胶体纳米晶体薄膜中的粘塑性和颗粒行为。
Viscoplastic and granular behavior in films of colloidal nanocrystals.
作者信息
Lee Dongyun, Jia Shengguo, Banerjee Sarbajit, Bevk Joze, Herman Irving P, Kysar Jeffrey W
机构信息
Department of Mechanical Engineering, Columbia University, New York, New York 10027, USA.
出版信息
Phys Rev Lett. 2007 Jan 12;98(2):026103. doi: 10.1103/PhysRevLett.98.026103. Epub 2007 Jan 9.
Nanoindentation measurements of electrophoretically deposited films of colloidal CdSe nanocrystals, capped by organic ligands, show the films have an elastic stiffness modulus of approximately 10 GPa and exhibit viscoplasticity. This mechanical response suggests polymeric features that are attributable to the ligands. After particle cross-linking and partial ligand removal, the films exhibit more features of granularity.
对由有机配体包覆的胶体CdSe纳米晶体的电泳沉积膜进行的纳米压痕测量表明，这些膜具有约10 GPa的弹性刚度模量，并表现出粘塑性。这种力学响应表明存在可归因于配体的聚合物特性。在颗粒交联和部分配体去除后，这些膜表现出更多的颗粒状特征。
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