June 2010

Journal

Size-Dependent Temperature Effects on PbSe Nanocrystals

By:
Dai, Quanqin ; Zhang, Yu; Wang, Yingnan; Hu, Michael Z; Zou, Bo; Yu, Williams
Journal Name:
Langmuir
Page Number:
11435-11440
Volume:
26
Issue Number:
13
Publication Date:
June 2010
View DOI Listing:
https://doi.org/10.1021/la101545w

Abstract

An investigation show that the temperature-induced band gap (Eg) variation of PbSe nanocrystals is strongly sizedependent. The temperature coefficients (dEg/dT) evolve from negative to zero and then to positive values, with the increase of PbSe nanocrystal sizes. Such phenomena imply that PbSe nanocrystals may be the potential candidate as sensitive temperature markers. Additional analyses disclose that the molar extinction coefficients of PbSe nanocrystals remain unchanged in the investigated temperature range (25-120 oC).