Staff
Head of group
Prof. Dr. hab. Krzysztof Witold Wojciechowski
phone: +48 61 86 95 260, room: 239, 262
The group
Prof. Dr. hab. Piotr Rozmej
e-mail: piotr.rozmej@ifmpan.poznan.pl
Dr. hab. Konstantin Tretiakov, Prof. IFM PAN
phone: +48 61 86 95 276, room: 260, 265
e-mail: konstantin.tretiakov@ifmpan.poznan.pl
www: home pageDr. hab. Przemysław Kędziora
phone: +48 61 86 95 166, room: 235
Dr. Eng. Jakub Narojczyk
phone: +48 61 86 95 151, room: 232
e-mail: jakub.narojczyk@ifmpan.poznan.pl
www: home page
Associates
Dr. Eng. Paweł Pigłowski
Dr. Eng. Artur Poźniak
Research
Head: Prof. Dr. habil. Krzysztof Witold Wojciechowski
Research goals
Investigations of counterintuitive phenomena, their description and explanation. In particular:
- studies of models and materials exhibiting anomalous properties (e.g. negative Poisson's ratio, negative thermal expansion, and negative mechanical compliance - local or directional) or extreme properties (e.g. containing instable inclusions),
- studies of the influence of various microscopic factors on macroscopic properties of the systems under consideration,
- the identification of the phenomena and mechanisms behind the specific properties of matter that offer the possibility of practical applications.
Research profile
The research concerns micro- and macroscopic models of complex systems in the context of their extraordinary physical properties: structural, dynamic and thermodynamic. Our studies concentrate on the so-called auxetics, i.e. systems exhibiting anomalous (negative) Poisson's ratio, as well as on materials with instable inclusions, systems exhibiting negative thermal expansion and magneto-elastic systems. Beside some theoretical methods, various computer simulation methods and numerical techniques are used in the department, e.g., molecular dynamics, Monte-Carlo, mesh methods (finite element method) and meshless methods (fundamental solutions method).
Research projects
- Project of the Polish National Center for Science: Computer modeling of auxetic foams (2013-2017, project leader: MSc. Eng. A.A.Pozniak, project supervisor: prof. Dr. Habil. K.W. Wojciechowski)
- Projects of the Ministry of Science and Higher Education:
- Influence of the particles' size polydispersity on the elastic properties of classical model systems (2010-2013, project leader Dr. Habil. K.W. Tretiakov)
- Influence of the particles' size polydispersity on the elastic properties of selected molecular model systems (2007-2009, project leader: Prof. Dr. Habil. K.W. Wojciechowski, PhD student: J.W. Narojczyk)
Scientific Achievements
- Microscopic studies, light transmission, dielectric and Hyper-Rayleigh scattering for two derivatives of bipiromidine showed high variety of physicochemical properties for both compounds. It has been discovered that both compounds exhibit liquid crystal properties in a certain range of temperatures. Besides strong fluorescence and two-photon absorption, these materials exhibit second-harmonic generation while subjected to laser illumination [S. van Cleuvenbergen, P. Kedziora, et al., Angew. Chem. Int. Ed. 56, 9546-9550 (2017)].
- Time evolution of magnetic domains in magnetic auxetics with Ising interactions (where magnetic interaction depends on the lattice constant) were studied by computer simulations. It has been shown that mechanical deformation of the structure impacts on the domains evolution and the rate of the domains increase does not fulfill the power dependence related to Ising model with fixed lattice constant. It has been also shown that by altering the rate of mechanical deformation for the studied model, one can control the rate of the magnetic domains increase and, in the consequence, magnetic properties of the system. This may be of significance for certain practical applications [K.K. Dudek, et al. Phys. Stat. Solidi RRL 11 (8) 1700122 (2017)].
- Selected structures of planar composites with periodic elliptical inclusions have been studied by computer simulations using finite element method. It has been shown that introducing non-auxetic macroinclusions in a non-auxetic matrix one can obtain an auxetic composite with high Young's modulus [A.A. Pozniak, K.W. Wojciechowski, J.N. Grima, L. Mizzi, Composites Part B 94, 379-388 (2016)].
- With the use of high scale computer simulations (1 million CPU hours) it has been shown how to obtain the thinest auxetic yet proposed, from a graphene sheet. The mechanism behind the auxetic properties has been explained [J.N. Grima et al., Adv. Mater. 27, 1455 (2015)].
- A novel, effective method for calculations of elastic constants for systems with long range inter-particle interactions has been proposed and tested for Lennard-Jones interactions [K.V. Tretiakov, K.W. Wojciechowski, Computer Phys. Commun. 189, 77 (2015)].
- The structure and the properties of thin smectic layers placed in water has been studied using McMilan mean field method. It has been concluded that the transition of molecules from smectic A phase to an isotropic phase, commonly referred to as "melting", starts from the center of the system and moves towards the surfaces [I. Śliwa, A.V. Zakharov, J. Chem. Phys. 141, 194706 (2014)].
- It has been shown that in the systems which are far from thermodynamic equilibrium, the nature favors the realization of states of lower energy dissipation. States with higher energy dissipation are also possible but less likely to occur [K.V. Tretiakov et al., Angewandte Chemie Intern. Ed. 52, 10304 (2013)].
- By finite element methods it has been shown that after uniform compression and the removal of internal tensions the planar model foams spontaneously transfer into the auxetic state (their Poisson's ratio becomes negative). This means that methods for the foam auxetization used to date, are the special case of a general strategy [A.A. Poźniak et al., Smart Mater. Struct. 22, 084009 (2013)].
- It has been shown that Poisson's ratio of two-dimensional system of polydisperse hard discs tends to +1 in the high pressure limit, for any non-zero polydispersity. This implies that Poisson's ratio is not continuous in this limit, when the polydispersity tends to zero [K.V. Tretiakov, K.W. Wojciechowski, J. Chem. Phys. 136, 204506 (2012)].
- It has been shown that carbon nanotube heterojunctions are able to filter specific vibration modes, what can be useful in construction of novel stress nano-sensors or vibration filters [F. Scarpa et al., Nanotechnology 22, 465501 (2011)].
- It has been shown that below a certain critical value of the Poisson's ratio, auxetic systems can exhibit locally negative mechanical compliance. This encourages one for applying auxetics as nano inclusions to produce materials with extreme mechanical properties (hardness, dumping, etc.) [A.A. Poźniak et al., Rev. Adv. Mater. Sci. 23,169 (2010)].
- The propagation of soliton waves in auxetic plates has been studied. The results can be helpful in a non-destructive analysis of materials (especially composites) with the use of soliton impulses that are significantly less suppressed compared to harmonic vibrations P. Kolat et al., J. Non-Cryst. Solids 356, 2001 (2010)].
- It has been shown that: (i) particle size polydispersity leads typically to an increase of the Poisson's ratio, which (ii) can be significantly lower for anisotropic systems than for isotropic systems. certain mechanisms leading to a decrease of Poisson's ratio has been identified [J.W. Narojczyk, PhD Thesis (2009)].
- The measurements of nonlinear dielectric effect relaxation in the isotropic, cholesteric and blue phases have been carried out for the first time [P. Kędziora, K.W. Wojciechowski, J. Phys. Chem. B 113, 9123 (2009)].
During the period of 2009-2017 three research projects were conducted. Two of them concerned the influence of particle size polydispersity on elastic properties of the studied model systems. Auxetic properties were observed in a number of systems. It has been also shown that (at high pressure limit) the disorder causes an increase of the average Poisson's ratio to the extreme positive value which is possible for isotropic materials. The third project concerned computer modeling of auxetic foams. Among others, it has been shown that by compressing model foams of positive Poisson's ratios and removing the internal stresses one obtains auxetic foams.
Cooperation
- Institut des Sciences Chimiques de Rennes, UMR 6226 CNRSUniversite de Rennes, Rennes, France (Prof. F. Camerel)
- Katholieke Univ Leuven, Department of Chemistry, Lab Mol Elect & Photon, Leuven, Belgium (Prof. K. Clays)
- Materials and Engineering Research Institute, Sheffield Hallam University, United Kingdom (Prof. A. Alderson)
- Instytut Fizyki, Uniwersytet w Zielonej Górze, Poland (Prof. M. Dudek)
- Department of Chemistry, University of Malta, Malta (Prof. J. N. Grima)
- Department of Chemistry at Ulsan National Institute of Science and Technology, South Korea (Prof. B. Grzybowski)
- Department of Physics, Royal Holloway, University of London, United Kingdom (Prof. D. M. Heyes)
- KFKI Atom Energy Res Inst, H-1525 Budapest, Hungary (Prof. A. R. Imre)
- Department of Engineering Physics, University of Wisconsin, USA (Prof. R. S. Lakes)
- School of Science and Technology, Singapore University of Social Sciences, Singapore (Prof. T.-C. Lim)
- Wydział Fizyki Technicznej i Matematyki Stosowanej, Politechnika Gdańska, Gdańsk, Polska (Prof. J. Rybicki)
- Aerospace Engineering, University of Bristol, United Kingdom (Prof. F. S. Scarpa)
- Instytut Mechaniki Stosowanej, Politechnika Poznańska, Poznań, Poland (Prof. T. Stręk)
- Department of Civil Engineering, National Cheng Kung University, Tajwan (Prof. Y.-C. Wang)
Conferences
Organized and co-organized Conferences
- The 17th International Conference on Functional and Nanostructured Materials, Paralia Katerinis, Greece, 4-11 September 2021.
- The 10th International Conference Auxetics and other materials and models with "negative" characteristics and 15th International Workshop Auxetics and related systems, Bedlewo near Poznan, Poland, 2-6 September, 2019.
- The 16th Conference on Functional and Nanostructured Materials, Athens and Agi Teodori, Greece, 31 August – 7 September, 2019.
- The 15th Conference on Functional and Nanostructured Materials, Paralia Katerinis, Greece, 1–8 September, 2018
- FNMA'2017 and PDS'17 joint conferences, held in Lviv, Ukraine, 25-26 September 2017 and continued in Yaremche, Ukraine, 27-29 September 2017
- Ósme Warsztaty Nanotechnologiczne PoWieFoNa'2017, 27-29 September 2017, Yaremche, Ukraine
- Siódme Warsztaty Nanotechnologiczne PoWieFoNa'2016, 26-30 September 2016, Swornegacie, Poland
- FNMA'2015, 12 Int. Workshop on Functional and Nanostructured MAterials, 6-10 September 2015, Zakynthos, Greece
- Szóste Warsztaty Nanotechnologiczne PoWieFoNa'2015, 22-25 June 2015, Łódź, Poland
- FNMA'2014 (11th Int. Workshop on Functional and Nanostructured MAterials, Camerino, Italy, 1-5 September 2014)
- 5th International Conference >>Auxetics and other materials and models with "negative" characteristics<< and 10th International Workshop >>Auxetics and related systems<<, Poznan, Poland, 15-19 September 2014
- PoWieFoNa'2014 (Piate Warsztaty Nanotechnologiczne, Szczecin, Poland, 16-18 June 2014)
- TRECOP'2014 (The International Symposium on Trends in Continuum Physics, 4-7 May 2014, Bedlewo, Poland)
- FNMA'2013 (10th Int. Workshop on Functional and Nanostructured MAterials, Poros, Greece, 8-12 September 2013)
- PoWieFoNa'2013 (Czwarte Warsztaty Nanotechnologiczne, Gdansk, Poland, 25-28 June 2013)
- FNMA'2012 (9th Int. Workshop on Functional and Nanostructured MAterials, Aegina, Greece, 23-27 September 2012)
- PoWieFoNa'2012 (Trzecie Warsztaty Nanotechnologiczne, Ostrów Wielkopolski, Poland, 3-6 June 2012)
- 8th Workshop on "Auxetics and Related Systems", Auxetics 2011, Szczecin, Poland, 6-9 September 2011
- Functional and Nanostructured Materials, Szczecin, Poland , 6-9 September 2011
- 3rd International Conference and the 7th International Workshop on Auxetics and Related Systems, AUXETICS'2010, Malta, 19-23 July 2010
- 7th International Workshop on Functional and Nanostructured Materials, FNMA 2010, Malta, 16-20 July 2010
- The International Symposium Trends in Continuum Mechanics, TRECOP 2010, Malta, 16-20 July 2010
- 5th International Conference Physics of Disordered Systems, PDS 2010, Gdansk-Sobieszewo, Poland, 23-27 May 2010
- 6th International Workshop on Functional and Nanostructured Materials, FNMA 2009, L'Aquila-Sulmona, Italy, 27-30 August, 2009
- Pierwsze Warsztaty Nanotechnologiczne, PoWieFoNa'2009, 28-30 June 2009, Mielno k/Koszalin, Poland
- 5th International Workshop on Functional and Nanostructured Materials, FNMA 2008, Lviv, Ukraine, 31 August- 6 September 2008
- US-Poland-Workshop on Interfacial Phenomena and Advanced Materials, Gdańsk, Poland, 3-6 June 2008
- The International Symposium on Trends in Continuum Physics, TRECOP 2007,Lviv, Ukraine, 16 - 20 September 2007
- 4th International Workshop on Functional and Nanostructured Materials, FNMA 2007, Gdańsk, Poland, 1 - 6 September 2007
- 3rd International Workshop on Functional Materials, FMA 2006, Ateny, Greece, 17 - 23 September 2006
- U.S. Poland Workshop on Nanoscience and Nano Structured Materials, Uniwersytet im. Adama Mickiewicza, Poznań, Poland, 26-28 June 2006
- 2nd Advanced Research Workshop on Auxetics and Other Unusual Systems, Poznań Będlewo, Poland, 19 25 August 2005
- Advanced Research Workshop on Auxetics and Related Systems, Poznań Będlewo, Poland, 27-30 June 2004
Lectures and announcements
- Jakub Narojczyk, „Poisson's Ratio of the f.c.c. Hard Sphere Crystals with Periodically Arranged Nanoinclusions of Hard Spheres of Another Diameter” 47th Congress of Polish Physicists Bydgoszcz, 19-23/09/2021 - (lectures);
- Jakub Narojczyk, „Modification of Elastic Properties of the f.c.c. Hard Sphere Crystals Using Periodically Arranged Nanoinclusions of Hard Spheres of Another Diameter” 17th International Conference on Functional and Nanostructured Materials, Paralia Katerinis, Greece, September 4-11, 2021, p.55 – (on-line lectures).
- Kędziora, S. van Cleuvenbergen, G. Depotter, K. Clays, „Second-order NLO response in chiral ferroelectric liquid crystals”, 17th Conference on Functional and Nanostructured Materials, Paralia Katerinis, Greece, September 4-11, 2021, p.40 – (on-line lectures)
- V. Tretiakov, „ Strategy locomotion of metastatic cancer cells: Is it a Lévy-like movement?”, 17th Conference on Functional and Nanostructured Materials, Paralia Katerinis, Greece, 2021, p.69 – (lectures)
- Krzysztof W. Wojciechowski, Mikołaj Bilski, and Paweł M. Pigłowski, „ Extreme (maximum) Poisson’s ratios in some planar systems”, 17th Conference on Functional and Nanostructured Materials, Paralia Katerinis, Greece, 2021, p.73 – (lectures)
Publications
Publications: 2021, 2020, 2019, 2018, 2017, 2016, 2015, 2014, 2013, 2012, 2011, 2010, 2009, 2008, 2007, 2006, 2005
2021
- Extreme Poisson's Ratios of Honeycomb, Re-Entrant, and Zig-Zag Crystals of Binary Hard DiscsSymmetry-Basel 13, 1127, 2021
- Shearing Deformations of beta-Cristobalite-Like Boron ArsenateSymmetry-Basel 13, 977, 2021
- Cancellation of Auxetic Properties in FCC Hard Sphere Crystals by Hybrid Layer-Channel Nanoinclusions Filled by Hard Spheres of Another DiameterMaterials 14, 3008, 2021
- Second-order NLO response in chiral ferroelectric liquid crystals: Molecular and bulk considerationJournal of Molecular Liquids 326, 115328, 2021
- Compression and low velocity impact response of wood-based sandwich panels with auxetic lattice coreEuropean Journal of Wood and Wood Products 79, 797-810, 2021
- Role of the phonon confinement effect and boundary scattering in reducing the thermal conductivity of argon nanowireJournal of Chemical Physics 154, 054702, 2021
- Wear Resistance Improvement of Cemented Tungsten Carbide Deep-Hole Drills after Ion ImplantationMaterials 14, 239, 2021
- Extremely Non-Auxetic Behavior of a Typical Auxetic Microstructure Due to Its Material PropertiesMaterials, 14, 7837, 2021
2020
- Auxetics and Other Systems with "Negative" CharacteristicsPhysica Status Solidi B-Basic Solid State Physics 257, 2000496, 2020
- Auxetic, Partially Auxetic, and Nonauxetic Behaviour in 2D Crystals of Hard Cyclic TetramersPhysica Status Solidi-Rapid Research Letters 14, 2000198, 2020
- Self-induced global rotation of chiral and other mechanical metamaterialsInternational Journal of Solids And Structures 191, 212-219, 2020
- The Influence of the Soft Yukawa Potential and Hard Core Interactions on Auxeticity of the Face Centered Cubic Crystal of Hard-Core Repulsive Yukawa ParticlesPhysica Status Solidi B-Basic Solid State Physics 257, 2000194, 2020
- Stiffness of Synclastic Wood-Based Auxetic Sandwich PanelsPhysica Status Solidi B-Basic Solid State Physics 257, 1900749, 2020
2019
- Determination of thermal conductivity coefficient by Green-Kubo formula using the minimum image methodComputational Methods in Science and Technology 25, 99-103 (2019)
- Magnetocaloric materials with ultra-small magnetic nanoparticles working at room temperatureScientific Reports 9, 17607, 2019
- Response of wood-based sandwich beams with three-dimensional lattice coreComposite Structures 216, 340-349, 2019
- Poisson's Ratio of the f.c.c. Hard Sphere Crystals with Periodically Stacked (001)-Nanolayers of Hard Spheres of Another DiameterMaterials 12, 700, 2019
- Auxetic Properties of a f.c.c. Crystal of Hard Spheres with an Array of [001]-Nanochannels Filled by Hard Spheres of Another DiameterPhysica Status Solidi B-Basic Solid State Physics 256, 1800611, 2019
- Auxetics and Other Systems of Anomalous CharacteristicsPhysica Status Solidi B-Basic Solid State Physics 256, 1800736, 2019
2018
- High Partial Auxeticity Induced by Nanochannels in [111]-Direction in a Simple Model with Yukawa InteractionsMaterials 11, 2550, 2018
- Selective enhancement of auxeticity through changing a diameter of nanochannels in Yukawa systemsSmart Materials and Structures 27, 115021, 2018
- Levy-like movement patterns of metastatic cancer cells revealed in microfabricated systems and implicated in vivoNature Communications 9, 4539, 2018
- Ion implantation of the tool's rake face for machining of the Ti-6Al-4V alloyJournal of Manufacturing Processes 34, 274-280, 2018
- Potential of mechanical metamaterials to induce their own global rotational motionSmart Materials and Structures 27, 055007, 2018
- Pressure-Volume Work for Metastable Liquid and Solid at Zero PressureEntropy 20, 338, 2018
- Auxetic Lattice Truss Cores Fabricated of LayWoodBioresources 13, 8823-8838, 2018
2017
- Computational Modelling of Structures with Non-Intuitive BehaviourMaterials 10, 1386, 2017
- Maximum Poisson's ratios in planar isotropic crystals of binary hard discs at high pressuresPhysica Status Solidi B 254, 1700543, 2017
- Auxetics and other systems of anomalous characteristics prefacePhysica Status Solidi B 254, 1770266, 2017
- Auxeticity enhancement due to size polydispersity in fcc crystals of hard-core repulsive Yukawa particlesSoft Matter 13, 7916-7921, 2017
- Auxeticity of Yukawa Systems with Nanolayers in the (111) Crystallographic PlaneMaterials 11, 1338, 2017
- Programmable magnetic domain evolution in magnetic auxetic systemsPhysica Status Solidi-Rapid Research Letters 11, 1700122, 2017
- Chiral side groups trigger second harmonic generation activity in 3D octupolar bipyrimidine-based organic liquid crystalsAngewandte Chemie-International Edition 56, 9546-9550, 2017
2016
- Auxetics and other systems of "negative" characteristics PrefacePhysica Status Solidi B 253, 1241-1242, 2016
- Tailoring Poisson's ratio by introducing auxetic layersPhysica Status Solidi B 253, 1318-1323, 2016
- Influence of nanochannels on Poisson's ratio of degenerate crystal of hard dimersPhysica Status Solidi B 253, 1324-1330, 2016
- Partial auxeticity induced by nanoslits in the Yukawa crystalPhysica Status Solidi-Rapid Research Letters 10, 566-569, 2016
- Planar auxeticity from elliptic inclusionsComposites Part B 94, 379-388, 2016
- Thermal conductivity of liquid argon in nanochannels from molecular dynamics simulationsJournal of Chemical Physics 144, 194507, 2016
- Auxetics in smart systems and structures 2015 PrefaceSmart Materials and Structures 25, 050301, 2016
- The influence of large deformations on mechanical properties of sinusoidal ligament structuresSmart Materials and Structures 25, 054002, 2016
- Enhanced auxeticity in Yukawa systems due to introduction of nanochannels in [001]-directionSmart Materials and Structures 25, 054007, 2016
- Unimode metamaterials exhibiting negative linear compressibility and negative thermal expansionSmart Materials and Structures 25, 025009, 2016
- Elasticity of the Sm1-xYxS alloy based on ultrasonic measurementsIOP Conference Series-Materials Science and Engineering 142, 012029, 2016
- Special issue trends in continuum physics (TRECOP 2014) PrefaceJournal of Mechanics of Materials and Structures 11, 1-2, 2016
- Limitations of Applicability of the Green-Kubo Approach for Calculating the Thermal Conductivity of a Confined Liquid in Computer SimulationsComputational Methods in Science and Technology 22(4), 197-200, 2016
- The application of the method of fundamental solutions in modeling auxetic materialsJournal of Mechanics of Materials and Structures 11, 79-90, 2016
2015
- Influence of translational disorder on the mechanical properties of hexachiral honeycomb systemsComposites Part B 80, 84-91, 2015
- Colossal magnetocaloric effect in magnetoauxetic systemsSmart Materials and Structures, 24, 085027, 2015
- Elastic properties of mono- and polydisperse two-dimensional crystals of hard-core repulsive Yukawa particlesPhys. Status Solidi B 252, 1508-1513, 2015
- Quick and accurate estimation of the elastic constants using the minimum image methodComputer Phys. Commun. 189, 77-83, 2015
- Solitary waves in auxetic rods with quadratic nonlinearity: Exact analytical solutions and numerical simulationsPhys. Status Solidi B 252, 1587-1594, 2015
- Tailoring Graphene to Achieve Negative Poisson’s Ratio PropertiesAdvanced Materials 27, 1455-1459, 2015
- Auxetics and other systems of "negative" characteristics PrefacePhys. Status Solidi B 252, 1421-1425, 2015
- Mesogenic, luminescence, and nonlinear optical properties of new bipyrimidine-based multifunctional octupolesJournal Of Physical Chemistry C 119, 3697-3710, 2015
2014
- Preface - Auxetic Materials and Related SystemsPhys. Status Solidi B 251, No. 2, 263–266 (2014)
- Dielectric relaxation modes in cholesteryl oleyl carbonate observed by non-linear dielectric spectroscopyLiq. Cryst., 41, 626-634 (2014)
- Poisson’s ratio of rectangular anti-chiral structures with size dispersion of circular nodesPhysica Status Solidi B 251, 367–374 (2014)
- Transition Helmholtz free energy, entropy and heat capacity of free-standing smectic films in water: A mean-field treatmentJournal of Chemical Physics 141, 194706, 2014
- Semi-Empirical Modelling of Glass Forming Ranges for Y-Co-Si SystemActa Physica Polonica A 126, pp. 62-63, 2014
- Partially auxetic behavior in fcc crystals of hard-core repulsive Yukawa particlesPhysica Status Solidi B 251, 383-387 (2014)
- Mesh versus meshless method of elastic displacement determination in a common and an auxetic materialPhys. Status Solidi B 251, No. 11, 2225–2232 (2014)
- Surface tension and disjoining pressure of free-standing smectic films above the bulk smectic-A-isotropic transition temperatureThe Journal of Chemical Physics 140, 124705, 2014
2013
- Smart metamaterials with tunable auxetic and other propertiesSmart Materials and Structures 22, 084016, 2013
- Smart hexagonal truss systems exhibiting negative compressibility through constrained angle stretchingSmart Materials and Structures 22, 084015, 2013
- Lattice summations for spread out particles: applications to neutral and charged systemsThe Journal of Chemical Physics 138, 034504, 2013
- Methods of Planes Normal Pressure for Slit Geometry in Molecular Dynamice SimulationsComputational Methods in Sciences and Technology 19(3), 167, 2013
- Computer simulations of auxetic foams in two dimensionsSmart Materials and Structures 22, 084009, 2013
- Elastic properties of fcc crystals of polydisperse soft spheresPhysica Status Solidi B 250, 2020-2029, 2013
- The Rate of Energy Dissipation Determines Probabilities of Non-equilibrium AssembliesAngewandte Chemie International Edition 52, 10304-10308, 2013
- Free Volume Approximation and Equation of State for the fcc Phase of Polydisperse Hard SpheresComputational Methods in Science and Technology 19(1), 59-64 (2013)
- Auxetic Materials and Related Systems PrefacePhysica Status Solidi B 250 (10), 1959-1962, 2013
2012
- Physica Status Solidi B 249(7), 1373-1378, 2012
- Computer simulation of solitary waves in a common or auxetic elastic rod with both quadratic and cubic nonlinearitiesPhysica Status Solidi B 249(7), 1386-1392, 2012
- Auxetic Materials and Related SystemsPhysica Status Solidi B 249(7), 1313-1314, 2012
- Mechanical properties of amorphous and partially crystalized Y50Cu24Al8 alloysIntermetallics 21, 75-79, 2012
- Inorganic salts direct the assembly of charged nanoparticles into composite nanoscopic spheres, plates, or needlesFaraday Discussions 159, 201-209, 2012
- Non-linear dielectric behaviour of 4,4‘-n-hexylcyanobiphenyl near the nematic-isotropic phase transitionLiquid Crystals Vol. 39, No. 4, 425-432, 2012
- Single particle force distributions in simple fluidsJournal of Chemical Physics 137, 094505, 2012
- Special issue Trends in Continuum Physics (TRECOP 2010) PREFACESource: Journal of Mechanics of Materials and Structures 7(3), 225-225 (2012)
- Calculation of glass forming ranges in the ternary Y-Cu-Al system and its sub-binaries based on geometric and Miedema's modelsintermetallics 26, 72-77, 2012
- Elasticity of twodimensional crystals of polydisperse hard disks near close packing: surprising behavior of the Poisson’s ratioThe Journal of Chemical Physics 136, 204506, 2012
2011
- Auxetic Materials and Related Systems – PrefacePhysica Status Solidi B 248, 28-29 (2011)
- Pair correlation function of soft-sphere fluidsJournal of Chemical Physics 134, art. 064115 (2011)
- Pair force distributions in simple fluidsJournal of Chemical Physics 135, art. 164507 (2011)
- Auxeticity of cubic materials under pressurePhysica Status Solidi B 248, 96-104 (2011)
- Solitary waves in auxetic rodsPhysica Status Solidi B 248, 148-157 (2011)
- Unusual deformation mechanisms in carbon nanotube heterojunctions (5,5)-(10,10) under tensile loadingPhysica Status Solidi B 248, 82-87 (2011)
- Self-filtering oscillations in carbon nanotube hetero-junctionsNanotechnology 22, art. 465501 (2011)
2010
- On relative stability of selected hard tetramer solids.Computational Methods in Science and Technology 16, 141-146, 2010
- Configurational temperature and Monte Carlo simulations.Computational Methods in Science and Technology 16, 119-125, 2010
- Anomalous Deformation of Constrained Auxetic Square.Reviews on Advanced Materials Science 23, 169-174, 2010
- Elastic properties of degenerate f.c.c. crystal of polydisperse soft dimers at zero temperature.Journal of Non-Crystalline Solids 356, 2026-2032, 2010
- Solitary waves in auxetic plates.Journal of Non-Crystalline Solids 356, 2001-2009, 2010
2009
- The dependence between forces and dissipation rates mediating dynamics self-assembly.Soft Matter 5, 1279-1284, 2009
- Auxeticity of cubic materials.Physica Status Solidi B, No. 9, 2063-2071, 2009
- Elastic properties of orientationally disordered crystal of mono- and polydisperse hard dumbbells in three dimensions.Materials Science Poland 26(4), 977-981, 2008)
- Influence of size polydispersity on the elastic constants of fcc crystals of static soft spheresMaterials Science Poland 26(4), 1001-1007, 2008
- Density and pressure dependence of the equation of state and transport coefficients of soft-sphere fluids.Molecular Physics Vol. 107, No. 4-6, 309-319, 2009
- Nonlinear dielectric relaxation in the isotropic phase and mesophases of cholesteryl oleyl carbonate.Journal of Physical Chemistry B 113, 9123-9128, 2009
- Additivity of the excess energy dissipation rate in a dynamically self-assembled system.Journal of Physical Chemistry B 113, 7574-7578, 2009
- Negative Poisson’s ratio of two-dimensional hard cyclic tetramers.Journal of Non-Crystalline Solids 355, 1435-1438, 2009
- Finite element analysis of auetic obstacle deformation and fluid flow in a channel.Journal of Non-Crystalline Solids 355, 1387-1392, 2009
- Soft-sphere soft glassesJ Chem Phys 131 (20): art. no. 204506 NOV 28 2009
- Interactions between microgel particlesSoft Matter 5, 2681, 2009
2008
- Elasticity of periodic and aperiodic structures of polydisperse dimers in two dimensions at zero temperature.phys. stat. sol. (b) 245, No. 11, 2463-2468, 2008
- Negative compressibility, negative Poisson’s ratio, and stability.physica status solidi (b) 245, No. 3, 545-551, 2008
- Elastic properties of the fcc crystals of soft spheres with size dispersion at zero temperature.physica status solidi (b) 245, No. 3, 606-613, 2008
- Self-diffusion coefficients and shear viscosity of inverse power fluids: from hard- to soft-spheres.Physical Chemistry Chemical Physics 10, 4036-4044, 2008
- Elastic properties of soft sphere crystal from Monte Carlo simulations.Journal of Physical Chemistry B 112, 1699-1705, 2008
- Spinodal strength of liquids, solids and glasses.Journal of Physics: Condensed Matter 20, 244104, 2008
- Transport coefficients of soft repulsive particle fluids.Journal of Physics: Condensed Matter 20, 115102, 2008
- Poisson's ratio of binary and polydisperse soft disk crystals.Journal of Non-Crystalline Solids 354, 4484-4487, 2008
- Finite element analysis of auxetic plate deformation.Journal of Non-Crystalline Solids 354, 4475-4480, 2008
- Magnetic films of negative Poisson’s ratio in rotating magnetic fields.Journal of Non-Crystalline Solids 354, 4304-4308, 2008
- The free energy of hard dimer solids revisited.Journal of Non-Crystalline Solids 354, 4354-4358, 2008
- Negative Poisson’s ratio behavior in the planar model of asymmetric trimers at zero temperature.Journal of Non-Crystalline Solids 354, 4242-4248, 2008
- Auxeticity of cubic materials: the role of repulsive core interaction.Journal of Non-Crystalline Solids 354, 4143-4145, 2008
- PrefacePhysica Status Solidi (b), vol. 245 (11), 2369-2372, 2008
- PrefaceJournal of Mechanics of Materials and Structures 3(6), 1033-1035, 2008
- ForewordJournal of Non-Crystalline Solids, vol. 354(35-39), vii-viii, 2008
- Auxetics and related systems - PrefacePhysica Status Solidi (b), 245 (3): 486-488, 2008
- Thermodynamic and mechanical stability of many-body systems interacting with coarse-grained bounded potentialsPhysica Status Solidi B, Nov. 2008; 245(11) 2415-2421
2007
- Poisson’s ratio of simple planar ‘isotropic’ solids in two dimensions.physica status solidi (b) 244, No. 3, 1038-1046, 2007
- Elastic properties of two-dimensional soft polydisperse trimers at zero temperature.physica status solidi (b) 244, No. 3, 943-954, 2007
- Physical properties of soft repulsive particle fluids.Physical Chemistry Chemical Physics 9, 5570-5575, 2007
- Poisson’s ratio of a soft sphere system.Materials Science - Poland Vol. 25, No. 2, 542-544, 2007
- Molecular dynamics simulations of auxetic ferrogelRev. Adv. Mater. Sci. 14, 167-173, 2007
- Elastic properties of soft disk crystalsRev. Adv. Mater. Sci. 14, 104-108, 2007
2006
- Infuence of disorder on the Poisson’s ratio of static solids in two dimensions.Reviews on Advanced Materials Sciences 12, 120-126, 2006
- Thermodynamic properties of inverse power fluids.Physical Review E 47, 031202-1 do 031202-11, 2006
- Computer simulation of Poisson’s ratio of soft polydisperse discs at zero temperature.Materials Science – Poland, Vol. 24, No 4, 921-927, 2006
- Percolation threshold of hard-sphere fluids in between the soft-core and hard-core limits.Molecular Physics Vol. 104, No. 20-21, 3137-3146, 2006
- First derivative of the hard-sphere radial distribution function at contact.Journal of Physics: Condensed Matter 18, 7553-7558, 2006
- A computational study of elastic properties of disordered systems with voids.Journal of Non-Crystalline Solids 352, 4283-4286, 2006
- Elastic properties of the degenerate crystalline phase of two-dimensional hard dimers.Journal of Non-Crystalline Solids 352, 4221-4228, 2006
- Elastic properties of two-dimensional soft discs of various diameters at zero temperature.Journal of Non-Crystalline Solids 352, 4292-4298, 2006
- Poisson’s ratio of orientationally disordered hard dumbbell crystal in three dimensions.Journal of Non-Crystalline Solids 352, 4269-4278, 2006
2005
- Monte Carlo simulation of two-dimensional hard body systems with extreme values of the Poisson’s ratio.physica status solidi (b) 242, No. 3, 2005, 730-741
- Extreme viscoelastic properties of composites of strongly inhomogeneous structures due to negative stiffness phases.physica status solidi b) 242, No. 3, 2005, 645-652
- Poisson’s ratio of degenerate crystalline phases of three-dimensional hard dimers and hard cyclic trimers.physica status solidi (b) 242, No. 3, 2005, 626-631
- Anomalous relaxation in dielectrics. Equations with fractional derivatives.Materials Science – Poland, Vol. 23, No. 4, 977-984, 2005
- Transport coefficients of soft sphere fluids.Physical Chemistry Chemical Physics 7, 2005, 1220-1227
- The effects of particle softness on the dynamics of molecular and colloidal systems.Molecular Physics, Vol. 103, No. 17, 2359-2373, 2005
- Poisson’s ratio of the fcc hard sphere crystal at high densities.The Journal of Chemical Physics 123, 074509-1 do 074509-8, 2005
- Poisson’s ratio of anisotropic systemsComputational Methods in Science and Technology 11(1), 73-79, 2005
- Preface.Special issue of the Physica Status Solidi (b)242, March 2005
Didactics
Wypromowani doktorzy:
- Krzysztof Hyżorek, Instytut Fizyki Molekularnej PAN 2019
(data obrony: 01.03.2019/ Data nadania stopnia: 2019-03-05)
Wpływ ograniczeń geometrycznych i polidyspersji rozmiarów cząstek na przewodnictwo cieplne układów modelowych
(prof. IFM PAN dr hab. K. V. Tretiekov) - Paweł Pigłowski, Instytut Fizyki Molekularnej PAN 2018
(data obrony: 29.03.2018/ Data nadania stopnia: 2018-04-10)
Badanie własności sprężystych strukturalnie zmodyfikowanych kryształów Yukawy za pomocą symulacji komputerowych
(prof. K.V. Tretiekov) - Artur A. Poźniak, Wydział Fizyki Technicznej, Politechnika Poznańska 2017
(data obrony: 20.12.2017/ Data nadania stopnia: 2017-12-22)
Symulacje komputerowe mechanizmów prowadzących do ujemnego współczynnika Poissona w różnych skalach
(prof. dr hab. Krzysztof W. Wojciechowski)
Działalność popularyzatorska
- Wykład popularno naukowy pt „Auksetyki - materiały inne niż wszystkie” wygłoszony w ramach cyklu „Fizyka Warta Poznania” 17 stycznia 2020 w IFM-PAN w Poznaniu - dr Jakub Narojczyk
- Udział w pokazach dla młodzieży w ramach Nocy Naukowców organizowanej w IFM-PAN w Poznaniu w 2019 - dr Jakub Narojczyk
- Wykład popularno naukowy pt „Wpływ nieporządku sieci krystalicznej na współczynnik Poissona w materiałach auksetycznych” wygłoszony w ramach warsztatów Lato z Helem 7 lipca 2017 w Odolanowie - dr Jakub Narojczyk
- Wykład popularno naukowy pt „Aplikacje open source w badaniach naukowych – na przykładzie komputerowych symulacji własności sprężystych wybranych materiałów modelowych” wygłoszony w ramach dnia wolnego oprogramowania – Software Freedom Day, 26 września 2017 na Politechnice Poznańskiej. - dr Jakub Narojczyk
Grants
- Zadania badawcze - Badania właściwości fizycznych metamateriałów mechanicznych, 2019 - 2021
Zakład Fizyki Komputerowej Układów Złożonych (Z10)
prof. dr hab. Krzysztof Wojciechowski - Auksetyczność poprzez nanoinkluzje - 2017/27/B/ST3/02955 (OPUS 14)
DEC-2017/27/B/ST3/02955 - prof. dr hab. Krzysztof Witold Wojciechowski
27.06.2018-26.06.2022 - Grant miniatura NCN (2021/05/X/ST3/01200) - Polish National Science Center, 2021 – 2022
„Kryształy f.c.c. twardych kul z inkluzjami atomowymi i molekularnymi – porównanie auksetyczności.”
dr Jakub Narojczyk - Projekt badawczy działań zintegrowanych PHC Polonium na lata 2016-2017
„Wielofunkcyjne chromofory ciekłokrystaliczne pochodnych bipirymidyny do trójwymiarowego (3CD) przechowywania danych.”
Projekt był wykonywany we współpracy IFM PAN (dr hab. P. Kędziora) oraz laboratorium Institute des Sciences Chimiques de Rennes, Universite de Rennes (prof. F. Camerel) - Grant obliczeniowy Poznańskiego Centrum Superkomputerowo Sieciowego, 2017-2022
„Komputerowe modelowanie inkluzji w wybranych modelach kryształów kubicznych”
dr Jakub Narojczyk