Shape change as an indicator of mechanism in the high-pressure structural transformations of CdSe nanocrystals

Autor:	A. P. Alivisatos, Amy B. Herhold, Juanita N. Wickham
Rok vydání:	1999
Předmět:	Diffraction Physics Phase transition Chemical physics Phase (matter) X-ray crystallography Stacking General Physics and Astronomy Synchrotron radiation Nanotechnology Crystal structure human activities Stacking fault
Zdroj:	Physical review letters. 84(5)
ISSN:	1079-7114
Popis:	X-ray diffraction was used to monitor the structure of 45 A diameter CdSe nanocrystals as they transformed repeatedly between fourfold and sixfold coordinated crystal structures. Simulations of the diffraction patterns reveal that a shape change occurs as the crystals transform. They also show that stacking faults are generated in the transition from the high- to the low-pressure phase. The shape change and stacking fault generation place significant constraints on the possible microscopic mechanism of the phase transition.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ee1778aafc23443b45a2a0db793a642f https://pubmed.ncbi.nlm.nih.gov/11017406 Zobrazit plný text záznamu