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Auxetics at the Molecular Level: A Negative Poisson's Ratio in Molecular Rods
Author(s) -
Pour Nir,
Itzhaki Lior,
Hoz Benaya,
Altus Eli,
Basch Harold,
Hoz Shmaryahu
Publication year - 2006
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.200601764
Subject(s) - auxetics , poisson's ratio , poisson distribution , rod , materials science , poisson regression , composite material , statistical physics , mathematics , physics , statistics , medicine , alternative medicine , pathology , population , demography , sociology
Negative feedback : Auxetic materials are materials that, counterintuitively, become thicker when stretched and thinner when compressed (negative Poisson's ratio). Quantum mechanical computations were used to identify poly[ n ]prismanes ( n =3–6), the first nanomolecular systems that manifest auxetic behavior at the molecular level. The magnitude of the negative Poisson's ratio in these prismanes ranges from 7 to 15 %.