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Sol–gel synthesis and optical properties of size controlled Indium Arsenide nanocrystals embedded in silica glasses |
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| Authors: | Heqing Yang Banglao Zhang Xiaoguang Wang Xingjun Wang Tie Li Songhai Xie Xi Yao |
| Affiliation: | aSchool of Chemistry & Material Science, Shaanxi Normal University, Xi’an 710062, People's Republic of China bSurface Physics Laboratory, Fudan University, Shanghai 200433, People's Republic of China cNational Laboratory for infrared Physics, Shanghai Institute of Technical Physics, Chinese Academy of Science, Shanghai 200083, People's Republic of China dDepartment of Chemistry, Fudan University, Shanghai 200433, People's Republic of China eElectronic Materials Research Laboratory, Xian Jiaotong University, Xi’an 710049, People's Republic of China |
| Abstract: | III–V semiconductor Indium Arsenide (InAs) nanocrystals embedded in silica glasses was synthesized by combining the sol–gel process and heat treatment in H2 gas. The size of InAs nanocrystals can be easily controlled via changing the In and As content in the starting materials and the heating temperature in a H2 gas atmosphere. Absorption measurements indicate a blue shift in energy with a reduction on the In and As content in the SiO2 gel glasses as a result of quantum confinement effects. A near-infrared photoluminescence with peak at 3.40 μm was observed at 6 K under 514.5 nm Ar+ laser excitation from InAs nanocrystals embedded in the silica gel glasses. |
| Keywords: | A1. Electron microscopy A1. Photoluminescence A1. Sol–gel chemistry A1. X-ray diffraction B1. Glass B1. Nanomaterials B2. InAs |
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