CdSe Nanoparticle Elasticity and Surface Energy

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• 作者：Vanessa M. Huxter ; Anna Lee ; Shun S. Lo ; Gregory D. Scholes
• 刊名：Nano Letters
• 出版年：2009
• 出版时间：January 14, 2009
• 年：2009
• 卷：9
• 期：1
• 页码：405-409
• 全文大小：159K
• 年卷期：v.9,no.1(January 14, 2009)
• ISSN：1530-6992

文摘

The acoustic phonon modes of colloidal CdSe nanoparticles in solution (293 K) are passively measured by a third order ultrafast heterodyne cross-polarized transient grating measurement. Using the observed size-dependence of the acoustic phonon frequency, the elastic properties of the nanoparticles are determined. The size-dependence of the elastic modulus is then used to ascertain information about the relative surface energies of the nanocrystals and suggests the extent and depth of surface reconstruction.