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The Metamaterials Unit is involved in the study of materials with unusual behaviour, namely materials with

 

A list of publications carried out by academics working in the Metamaterials Unit is given below.

 

Publication List:

Grima, Joseph N.; Chetcuti, Elaine; Manicaro, Elaine; Attard, Daphne; Camilleri, Matthew; Gatt, Ruben; Evans, Kenneth E., 2012. On the auxetic properties of generic rotating rigid triangles. Proceedings of the Royal Society A-Mathematical Physical And Engineering Sciences, 468, pp.810-830. DOI: 10.1098/rspa.2011.0273

Grima, Joseph N.; Attard, Daphne; Caruana-Gauci, Roberto; Gatt, Ruben, 2011. Negative linear compressibility of hexagonal honeycombs and related systems. Scripta Materialia, 65, pp.565-568. DOI: 10.1016/j.scriptamat.2011.06.011

Grima, Joseph N.; Attard, Daphne; Gatt, Ruben, 2011. Unusual Thermoelastic Properties of Methanol Monohydrate. Science, 331, pp.687-688. DOI: 10.1126/science.1201564

Grima, Joseph N.; Manicaro, Elaine; Attard, Daphne, 2011. Auxetic behaviour from connected different-sized squares and rectangles. Proceedings of the Royal Society A-Mathematical Physical And Engineering Sciences, 467, pp.439-458. DOI: 10.1098/rspa.2010.0171

Grima, Joseph N.; Ravirala, Naveen; Galea, Romina; Ellul, Brian; Attard, Daphne; Gatt, Ruben; Alderson, Andrew; Rasburn, John; Evans, Kenneth E., 2011. Modelling and testing of a foldable macrostructure exhibiting auxetic behaviour. Physica Status Solidi B-Basic Solid State Physics, 248, pp.117-122. DOI: 10.1002/pssb.201083982

Gatt, Ruben; Attard, Daphne; Manicaro, Elaine; Chetcuti, Elaine; Grima, Joseph N., 2011. On the effect of heat and solvent exposure on the microstructure properties of auxetic foams: A preliminary study. Physica Status Solidi B-Basic Solid State Physics, 248, pp.39-44. DOI: 10.1002/pssb.201083978

Gaspar, N.; Smith, C. W.; Alderson, A.; Grima, J. N.; Evans, K. E., 2011. A generalised three-dimensional tethered-nodule model for auxetic materials. Journal of Materials Science, 46, pp.372-384. DOI: 10.1007/s10853-010-4846-0

Grima, Joseph N.; Attard, Daphne; Ellul, Brian; Gatt, Ruben, 2011. An Improved Analytical Model for the Elastic Constants of Auxetic and Conventional Hexagonal Honeycombs. Cellular Polymers, 30, pp.287-310.

Attard, Daphne; Grima, Joseph N., 2011. Modelling of hexagonal honeycombs exhibiting zero Poisson's ratio. Physica Status Solidi B-Basic Solid State Physics, 248, pp.52-59. DOI: 10.1002/pssb.201083980

Grima, Joseph N.; Attard, Daphne, 2011. Molecular networks with a near zero Poisson's ratio. Physica Status Solidi B-Basic Solid State Physics, 248, pp.111-116. DOI: 10.1002/pssb.201083979

Grima, Joseph N.; Ellul, Brian; Attard, Daphne; Gatt, Ruben; Attard, Michael, 2010. Composites with needle-like inclusions exhibiting negative thermal expansion: A preliminary investigation. Composites Science And Technology, 70, pp.2248-2252. DOI: 10.1016/j.compscitech.2010.05.003

Grima, Joseph N.; Oliveri, Ludovica; Attard, Daphne; Ellul, Brian; Gatt, Ruben; Cicala, Gianluca; Recca, Giuseppe, 2010. Hexagonal Honeycombs with Zero Poisson's Ratios and Enhanced Stiffness. Advanced Engineering Materials, 12, pp.855-862. DOI: 10.1002/adem.201000140

Grima, Joseph N.; Gatt, Ruben, 2010. On the behaviour of natrolite under hydrostatic pressure. Journal of Non-Crystalline Solids, 356, pp.1881-1887. DOI: 10.1016/j.jnoncrysol.2010.05.069

Grima, Joseph N.; Gatt, Ruben; Ellul, Brian; Chetcuti, Elaine, 2010. Auxetic behaviour in non-crystalline materials having star or triangular shaped perforations. Journal of Non-Crystalline Solids, 356, pp.1980-1987. DOI: 10.1016/j.jnoncrysol.2010.05.074

Alderson, A.; Alderson, K. L.; Attard, D.; Evans, K. E.; Gatt, R.; Grima, J. N.; Miller, W.; Ravirala, N.; Smith, C. W.; Zied, K., 2010. Elastic constants of 3-, 4-and 6-connected chiral and anti-chiral honeycombs subject to uniaxial in-plane loading. Composites Science And Technology, 70, pp.1042-1048. DOI: 10.1016/j.compscitech.2009.07.009

Grima, Joseph N.; Gatt, Ruben, 2010. Perforated Sheets Exhibiting Negative Poisson's Ratios. Advanced Engineering Materials, 12, pp.460-464. DOI: 10.1002/adem.201000005

Grima, Joseph N.; Oliveri, Ludovica; Ellul, Brian; Gatt, Ruben; Attard, Daphne; Cicala, Gianluca; Recca, Giuseppe, 2010. Adjustable and negative thermal expansion from multilayered systems. Physica Status Solidi-Rapid Research Letters, 4, pp.133-135. DOI: 10.1002/pssr.201004076

Grima, Joseph N.; Gatt, Ruben; Attard, Daphne; Cassar, Richard N., 2010. Molecular-Level Deformations in Auxetic Organic Networked Polymers. Contemporary Science of Polymeric Materials, 1061, pp.197-214.

Ellul, Brian; Muscat, Martin; Grima, Joseph N., 2009. On the effect of the Poisson's ratio (positive and negative) on the stability of pressure vessel heads. Physica Status Solidi B-Basic Solid State Physics, 246, pp.2025-2032. DOI: 10.1002/pssb.200982033

Attard, Daphne; Manicaro, Elaine; Grima, Joseph N., 2009. On rotating rigid parallelograms and their potential for exhibiting auxetic behaviour. Physica Status Solidi B-Basic Solid State Physics, 246, pp.2033-2044. DOI: 10.1002/pssb.200982034

Attard, Daphne; Manicaro, Elaine; Gatt, Ruben; Grima, Joseph N., 2009. On the properties of auxetic rotating stretching squares. Physica Status Solidi B-Basic Solid State Physics, 246, pp.2045-2054. DOI: 10.1002/pssb.200982035

Grima, Joseph N.; Cassar, Richard N.; Gatt, Ruben, 2009. On the effect of hydrostatic pressure on the auxetic character of NAT-type silicates. Journal of Non-Crystalline Solids, 355, pp.1307-1312. DOI: 10.1016/j.jnoncrysol.2009.05.018

Grima, Joseph N.; Attard, Daphne; Gatt, Ruben; Cassar, Richard N., 2009. A Novel Process for the Manufacture of Auxetic Foams and for Their re-Conversion to Conventional Form. Advanced Engineering Materials, 11, pp.533-535. DOI: 10.1002/adem.200800388

Gatt, Ruben; Attard, Daphne; Grima, Joseph N., 2009. On the behaviour of bi-material strips when subjected to changes in external hydrostatic pressure. Scripta Materialia, 60, pp.65-67. DOI: 10.1016/j.scriptamat.2008.08.045

Grima, Joseph N.; Wojciechowski, Krzysztof W., 2008. Papers presented at the 4th International Workshop on Auxetics and Related Systems Malta, 24-26 September 2007 Preface. Physica Status Solidi B-Basic Solid State Physics, 245, pp.2369-2371. DOI: 10.1002/pssb.200880273

Attard, Daphne; Grima, Joseph N., 2008. Auxetic behaviour from rotating rhombi. Physica Status Solidi B-Basic Solid State Physics, 245, pp.2395-2404. DOI: 10.1002/pssb.200880269

Grima, Joseph N.; Attard, Daphne; Gatt, Ruben, 2008. Truss-type systems exhibiting negative compressibility. Physica Status Solidi B-Basic Solid State Physics, 245, pp.2405-2414. DOI: 10.1002/pssb.200880267

Grima, Joseph N.; Zammit, Victor; Gatt, Ruben; Attard, Daphne; Caruana, Christian; Bray, Trevor G. Chircop, 2008. On the role of rotating tetrahedra for generating auxetic behavior in NAT and related systems. Journal of Non-Crystalline Solids, 354, pp.4214-4220. DOI: 10.1016/j.jnoncrysol.2008.06.081

Gatt, Ruben; Grima, Joseph N., 2008. Negative compressibility. Physica Status Solidi-Rapid Research Letters, 2, pp.236-238. DOI: 10.1002/pssr.200802101

Grima, Joseph N.; Farrugia, Pierre S.; Caruana, Christian; Gatt, Ruben; Attard, Daphne, 2008. Auxetic behaviour from stretching connected squares. Journal of Materials Science, 43, pp.5962-5971. DOI: 10.1007/s10853-008-2765-0

Gatt, Ruben; Zammit, Victor; Caruana, Christian; Grima, Joseph N., 2008. On the atomic level deformations in the auxetic zeolite natrolite. Physica Status Solidi B-Basic Solid State Physics, 245, pp.502-510. DOI: 10.1002/pssb.200777703

Grima, Joseph N.; Gatt, Ruben; Farrugia, Pierre-Sandre, 2008. On the properties of auxetic meta-tetrachiral structures. Physica Status Solidi B-Basic Solid State Physics, 245, pp.511-520. DOI: 10.1002/pssb.200777704

Grima, Joseph N.; Farrugia, Pierre-Sandre; Gatt, Ruben; Attard, Daphne, 2008. On the auxetic properties of rotating rhombi and parallelograms: A preliminary investigation. Physica Status Solidi B-Basic Solid State Physics, 245, pp.521-529. DOI: 10.1002/pssb.200777705

Grima, Joseph N.; Attard, Daphne; Cassar, Richard N.; Farrugia, Luke; Trapani, Lara; Gatt, Ruben, 2008. On the mechanical properties and auxetic potential of various organic networked polymers. Molecular Simulation, 34, pp.1149-1158. DOI: 10.1080/08927020802512187

Grima, Joseph N.; Farrugia, Pierre S.; Gatt, Ruben; Zammit, Victor, 2007. A system with adjustable positive or negative thermal expansion. Proceedings of the Royal Society A-Mathematical Physical And Engineering Sciences, 463, pp.1585-1596. DOI: 10.1098/rspa.2007.1841

Grima, Joseph N.; Gatt, Ruben; Zammit, Victor; Williams, Jennifer J.; Evans, Kenneth E.; Alderson, Andrew; Walton, Richard I., 2007. Natrolite: A zeolite with negative Poisson's ratios. Journal of Applied Physics, 101. DOI: 10.1063/1.2718879

Grima, J. N.; Zammit, V.; Gatt, R.; Aldersod, A.; Evans, K. E., 2007. Auxetic behaviour from rotating semi-rigid units. Physica Status Solidi B-Basic Solid State Physics, 244, pp.866-882. DOI: 10.1002/pssb.200572706

Grima, Joseph N.; Farrugia, Pierre-Sandre; Gatt, Ruben; Zammit, Victor, 2007. Connected triangles exhibiting negative Poisson's ratios and negative thermal expansion. Journal of the Physical Society of Japan, 76. DOI: 10.1143/JPSJ.76.025001

Grima, JN; Gatt, R; Ravirala, N; Alderson, A; Evans, KE, 2006. Negative Poisson's ratios in cellular foam materials. Materials Science And Engineering A-Structural Materials Properties Microstructure And Processing, 423, pp.214-218. DOI: 10.1016/j.msea.2005.08.229

Grima, JN; Gatt, R; Alderson, A; Evans, KE, 2006. An alternative explanation for the negative Poisson's ratios in alpha-cristobalite. Materials Science And Engineering A-Structural Materials Properties Microstructure And Processing, 423, pp.219-224. DOI: 10.1016/j.msea.2005.08.230

Grima, JN; Evans, KE, 2006. Auxetic behavior from rotating triangles. Journal of Materials Science, 41, pp.3193-3196. DOI: 10.1007/s10853-006-6339-8

Alderson, A; Davies, PJ; Evans, KE; Alderson, KL; Grima, JN, 2005. Modelling of the mechanical and mass transport properties of auxetic molecular sieves: an idealised inorganic (zeolitic) host-guest system. Molecular Simulation, 31, pp.889-896. DOI: 10.1080/08927020500378055

Alderson, A; Davies, PJ; Williams, MR; Evans, KE; Alderson, KL; Grima, JN, 2005. Modelling of the mechanical and mass transport properties of auxetic molecular sieves: an idealised organic (polymeric honeycomb) host-guest system. Molecular Simulation, 31, pp.897-905. DOI: 10.1080/08927020500385852

Grima, JN; Williams, JJ; Gatt, R; Evans, KE, 2005. Modelling of auxetic networked polymers built from calix[4] arene building blocks. Molecular Simulation, 31, pp.907-913. DOI: 10.1080/08927020500392114

Grima, JN; Gatt, R; Bray, TGC; Alderson, A; Evans, KE, 2005. Empirical modelling using dummy atoms (EMUDA): an alternative approach for studying "auxetic" structures. Molecular Simulation, 31, pp.915-924. DOI: 10.1080/08927020500401121

Grima, JN; Gatt, R; Alderson, A; Evans, KE, 2005. On the potential of connected stars as auxetic systems. Molecular Simulation, 31, pp.925-935. DOI: 10.1080/08927020500401139

Grima, JN; Gatt, R; Alderson, A; Evans, KE, 2005. On the auxetic properties of 'rotating rectangles' with different connectivity. Journal of the Physical Society of Japan, 74, pp.2866-2867. DOI: 10.1143/JPSJ.74.2866

Gaspar, N; Ren, XJ; Smith, CW; Grima, JN; Evans, KE, 2005. Novel honeycombs with auxetic behaviour. Acta Materialia, 53, pp.2439-2445. DOI: 10.1016/j.actamat.2005.02.006

Grima, JN; Alderson, A; Evans, KE, 2005. An alternative explanation for the negative Poisson's ratios in auxetic foams. Journal of the Physical Society of Japan, 74, pp.1341-1342. DOI: 10.1143/JPSJ.74.1341

Alderson, A; Alderson, KL; Evans, KE; Grima, JN; Williams, MR; Davies, PJ, 2005. Modelling the deformation mechanisms, structure-property relationships and applications of auxetic nanomaterials. Physica Status Solidi B-Basic Solid State Physics, 242, pp.499-508. DOI: 10.1002/pssb.200460370

Grima, JN; Alderson, A; Evans, KE, 2005. Auxetic behaviour from, rotating rigid units. Physica Status Solidi B-Basic Solid State Physics, 242, pp.561-575. DOI: 10.1002/pssb.200460376

Grima, JN; Williams, JJ; Evans, KE, 2005. Networked calix[4]arene polymers with unusual mechanical properties. Chemical Communications, pp.4065-4067. DOI: 10.1039/b505839b

Grima, JN; Gatt, R; Alderson, A; Evans, KE, 2005. On the origin of auxetic behaviour in the silicate alpha-cristobalitet. Journal of Materials Chemistry, 15, pp.4003-4005. DOI: 10.1039/b508098c

Grima, Joseph N.; Gatt, Ruben; Farrugia, Pierre-Sandre; Alderson, Andrew; Evans, Kenneth E., 2005. Auxetic cellular materials and structures. Proceedings of the ASME Aerospace Division, pp.489-495.

Alderson, A; Alderson, KL; Evans, KE; Grima, JN; Williams, M, 2005. Modelling of negative Poisson's ratio nanomaterials: Deformation mechanisms, structure-property relationships and applications. Science And Technology of Nanomaterials - ICMAT 2003, 23, pp.55-58.

Grima, JN; Jackson, R; Alderson, A; Evans, KE, 2000. Do zeolites have negative Poisson's ratios?. Advanced Materials, 12, pp.1912. DOI: 10.1002/1521-4095(200012)12:24<1912::AID-ADMA1912>3.0.CO;2-7

Smith, CW; Grima, JN; Evans, KE, 2000. A novel mechanism for generating auxetic behaviour in reticulated foams: Missing rib foam model. Acta Materialia, 48, pp.4349-4356. DOI: 10.1016/S1359-6454(00)00269-X

Grima, JN; Evans, KE, 2000. Auxetic behavior from rotating squares. Journal of Materials Science Letters, 19, pp.1563-1565. DOI: 10.1023/A:1006781224002

Grima, JN; Evans, KE, 2000. Self expanding molecular networks. Chemical Communications, pp.1531-1532. DOI: 10.1039/b004305m


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PhD / MSc Metamaterials
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