Mechanical Properties of a Series of Macro- and Nanodimensional Organic Cocrystals Correlate with Atomic Polarizability
作者:Thilini P. Rupasinghe、Kristin M. Hutchins、Bimali S. Bandaranayake、Suman Ghorai、Chandana Karunatilake、Dejan-Krešimir Bučar、Dale C. Swenson、Mark A. Arnold、Leonard R. MacGillivray、Alexei V. Tivanski
DOI:10.1021/jacs.5b07873
日期:2015.10.14
A correlation between Young's modulus, as determined by using nanoindentation atomic force microscopy (AFM), and atomic polarizability is observed for members of a series of cocrystals based on systematic changes to one cocrystal component. Time domain spectroscopy over terahertz frequencies (THz-TDS) is used for the first time to directly measure the polarizability of macro- and nanosized organic solids. Cocrystals of both macro- and nanodimensions with highly polarizable atoms result in softer solids and correspondingly higher polarizabilities.