Journal
CRYSTENGCOMM
Volume 12, Issue 6, Pages 1856-1861Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/b919087m
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Funding
- National Natural Science Foundation of China [20873118]
- Program for New Century Excellent Talents in University [NCET-08-0665]
- Innovation Scientists and Technicians Troop Construction Projects of Henan Province [10410051001]
- Program for Science & Technology Innovation Talents in Universities of Henan Province [2008 HASTIT016]
- Science and Technology Key Project of Henan Province [082102230036]
- International Cooperation Program of Henan Province
- Education Department of Henan Province, China [2008A150023]
- Science & Technology Department of Henan Province, China [082300440120]
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Dendritic nanocrystals of copper selenide were fabricated in situ for the first time by using alcohol as the solvent. Cu2-xSe films composed of hierarchically ordered dendritic nanostructures were prepared on Cu substrates at a rather moderate temperature of 190-200 degrees C for just 1-3 h, while bunchy CuSe nanostructures could be further constructed above the Cu2-xSe dendrites by prolonging the reaction time of solvothermal growth with ethanol as the solvent. The resulting Cu2-xSe nanodendrites display highly symmetric corolitic morphology while the bunchy CuSe aggregations show particular nanostructures with a pronounced trunk and actinomorphic multi-branches. It is also found that the dendritic structures of crystalline Cu2-xSe could never be obtained when the reaction temperature is less than 190 degrees C, while the temperature needed is 160 degrees C for Ag2Se nanodendrites and higher than 220 degrees C for CdSe nanodendrites. These copper selenide nanostructures with hierarchically ordered 3-dimensional (3D) framework exhibited good absorbance and photoluminescence (PL) property and could bear potential applications in solar cell devices in the future.
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