Journal
LANGMUIR
Volume 26, Issue 13, Pages 11435-11440Publisher
AMER CHEMICAL SOC
DOI: 10.1021/la101545w
Keywords
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Funding
- Worcester Polytechnic Institute
- National 863 Projects of China [2007AA03Z112, 2007AA06Z112]
- NSFC [20773043]
- National Basic Research Program of China [2005CB724400, 200703808000]
- U.S. Department of Energy
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An investigation show that the temperature-induced band gap (E-g) variation of PbSe nanocrystals is strongly size-dependent. The temperature coefficients (dE(g)/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 degrees C).
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