Solid-phase flexibility in Ag2Se semiconductor nanocrystals

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

Research output: Contribution to journalArticle

Abstract

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.

Original languageEnglish (US)
Pages (from-to)115-121
Number of pages7
JournalNano Letters
Volume14
Issue number1
DOIs
StatePublished - Jan 8 2014

Fingerprint

Nanocrystals
solid phases
nanocrystals
flexibility
Phase transitions
Semiconductor materials
surface treatment
Optoelectronic devices
Superconducting transition temperature
Surface treatment
transition temperature
Infrared radiation
Data storage equipment
conduction
Temperature
temperature
electronics

Keywords

  • AgSe
  • colloidal quantum dots
  • core-shell
  • phase diagram
  • Semiconductor nanocrystals
  • solid-solid phase transition

ASJC Scopus subject areas

  • Bioengineering
  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanical Engineering

Cite this

Sahu, A., Braga, D., Waser, O., Kang, M. S., Deng, D., & Norris, D. J. (2014). Solid-phase flexibility in Ag2Se semiconductor nanocrystals. Nano Letters, 14(1), 115-121. https://doi.org/10.1021/nl4041498

Solid-phase flexibility in Ag2Se semiconductor nanocrystals. / Sahu, Ayaskanta; Braga, Daniele; Waser, Oliver; Kang, Moon Sung; Deng, Donna; Norris, David J.

In: Nano Letters, Vol. 14, No. 1, 08.01.2014, p. 115-121.

Research output: Contribution to journalArticle

Sahu, A, Braga, D, Waser, O, Kang, MS, Deng, D & Norris, DJ 2014, 'Solid-phase flexibility in Ag2Se semiconductor nanocrystals', Nano Letters, vol. 14, no. 1, pp. 115-121. https://doi.org/10.1021/nl4041498
Sahu A, Braga D, Waser O, Kang MS, Deng D, Norris DJ. Solid-phase flexibility in Ag2Se semiconductor nanocrystals. Nano Letters. 2014 Jan 8;14(1):115-121. https://doi.org/10.1021/nl4041498
Sahu, Ayaskanta ; Braga, Daniele ; Waser, Oliver ; Kang, Moon Sung ; Deng, Donna ; Norris, David J. / Solid-phase flexibility in Ag2Se semiconductor nanocrystals. In: Nano Letters. 2014 ; Vol. 14, No. 1. pp. 115-121.
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