Details

Autor(en) / Beteiligte

• Sahu, Ayaskanta
• Braga, Daniele
• Waser, Oliver
• Kang, Moon Sung
• Deng, Donna
• Norris, David J

Titel

Solid-Phase Flexibility in Ag2Se Semiconductor Nanocrystals

Ist Teil von

• Nano letters, 2014-01, Vol.14 (1), p.115-121

Ort / Verlag

Washington, DC: American Chemical Society

Erscheinungsjahr

2014

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• 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.