Synthesis and Photoluminescence of SnO2/SiO2 Microrings


  • This work was supported by the Natural Science Foundation of China (Grant No. 10 374 092 and 50 271 068) and the Ministry of Science and Technology of China (Grant No. G1 999 064 501).


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A simple two-step heat-treatment process is used to create SnO2/SiO2 microrings. SnO2/SiO2 nanoparticles obtained in the first step are transformed into microrings (see Figure) in the second step owing to their low melting point and a decrease in the surface energy of the system. The SnO2/SiO2 microrings show favorable UV photoluminescence and may be used as UV laser emitters.