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Solid-Phase Flexibility in Ag2Se Semiconductor Nanocrystals
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DOI：10.1021/nl4041498.png)
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摘要
En 中文
Nanocrystals are known to alter the relative stability of bulk solid phases. Here we test the limits of this effect on Ag2Se nanocrystals, a promising new electronic and infrared material. In the bulk, Ag2Se exhibits a solid-solid phase transition to a superionic conducting phase at moderate temperatures. We map this phase transition as a function of size, temperature, and surface treatment in Ag2Se core-only and core-shell nanocrystals. We show that the transition can be tuned not just below but also above the bulk phase-transition temperature. This phase flexibility has implications for applications in optoelectronic and phase-memory devices.
Keyword:
Semiconductor nanocrystals
colloidal quantum dots
Ag2Se
solid-solid phase transition
phase diagram
core-shell
期刊
IF:
9.1
论文数:
2.7W
被引数:
16.5W
机构
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