Size dependence of a first order solid-solid phase transition: The wurtzite to rock salt transformation in CdSe nanocrystals

Journal Article · Fri Jul 15 04:00:00 EDT 1994 · Science (Washington, D.C.); (United States)

DOI:https://doi.org/10.1126/science.265.5170.373· OSTI ID:6923834

Tolbert, S H; Alivisatos, A P ^[1]

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1. Lawrence Berkeley Lab., CA (United States)

Measurements of the size dependence of a solid-solid phase transition are presented. High-pressure x-ray diffraction and optical absorption are used to study the wurtzite to rock salt structural transformation in CdSe nanocrystals. These experiments show that both the thermodynamics and kinetics of this transformation are altered in finite size, as compared to bulk CdSe. An explanation of these results in the context of transformations in bulk systems is presented. Insight into the kinetics of transformations in both bulk and nanocrystal systems can be gained.

• OSTI ID: 6923834
• Journal Information: Science (Washington, D.C.); (United States), Journal Name: Science (Washington, D.C.); (United States) Vol. 265:5170; ISSN SCIEAS; ISSN 0036-8075
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360202* -- Ceramics
Cermets
& Refractories-- Structure & Phase Studies
CADMIUM COMPOUNDS
CADMIUM SELENIDES
CHALCOGENIDES
CRYSTAL-PHASE TRANSFORMATIONS
KINETICS
PHASE TRANSFORMATIONS
SELENIDES
SELENIUM COMPOUNDS
THERMODYNAMICS