Baughman RH, Stafstrom S, Cui C, Dantas SO
R. H. Baughman and C. Cui, Allied Signal, Research and Technology, Morristown, NJ 07962-1021, USA. S. Stafstrom, Department of Physics and Measurement Technology, Linkoping University, S-581 83, Linkoping, Sweden. S. O. Dantas, Departamento.
Science. 1998 Mar 6;279(5356):1522-4. doi: 10.1126/science.279.5356.1522.
Rare crystal phases that expand in one or more dimensions when hydrostatically compressed are identified and shown to have negative Poisson's ratios. Some of these crystals (i) decrease volume and expand in two dimensions when stretched in a particular direction and (ii) increase surface area when hydrostatically compressed. Possible mechanisms for achieving such negative linear and area compressibilities are described for single crystals and composites, and sensor applications are proposed. Materials with these properties may be used to fabricate porous solids that either expand in all directions when hydrostatically compressed with a penetrating fluid or behave as if they are incompressible.
已识别出在静水压力压缩下会在一个或多个维度上膨胀的稀有晶体相，并表明它们具有负泊松比。其中一些晶体：(i) 在特定方向拉伸时体积减小并在二维方向上膨胀；(ii) 在静水压力压缩时表面积增加。针对单晶和复合材料描述了实现这种负线性和面积压缩率的可能机制，并提出了传感器应用。具有这些特性的材料可用于制造多孔固体，这些多孔固体在用渗透流体进行静水压力压缩时会在所有方向上膨胀，或者表现得好像它们是不可压缩的。
