Structural transformations and metastability in semiconductor nanocrystals

A. B. Herhold*, Chia Chun Chen, C. S. Johnson, S. H. Tolbert, A. P. Alivisatos

*此作品的通信作者

研究成果: 雜誌貢獻期刊論文同行評審

12 引文 斯高帕斯(Scopus)

摘要

Pressure-induced structural phase transitions have been studied in CdSe, CdS, InP and Si semiconductor nanocrystals. Nanocrystals transform via single nucleation of the phase transition with a kinetic barrier that increases in increasing cluster size. The structural transition path causes a shape change in the nanocrystals, which dictates the surface energy and thus the kinetic and thermodynamic stability of the transformed nanocrystal. These finite size effects can be used to tune the metastability of the nanocrystals versus pressure. Enhanced metastability allows structural and optical measurements in a regime inaccessible to the bulk solid, as well as possible recovery of the dense high pressure phase to atmospheric pressure.

原文英語
頁(從 - 到)1-25
頁數25
期刊Phase Transitions
68
發行號1
DOIs
出版狀態已發佈 - 1999
對外發佈

ASJC Scopus subject areas

  • 儀器
  • 材料科學(全部)

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