Experimental evidence for the quantum confinement effect in 3C-SiC nanocrystallites.
Experimental evidence for the quantum confinement effect in 3C-SiC nanocrystallites.
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DOI：
10.1103/physrevlett.94.026102
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发表时间：
2005-01
影响因子：
8.6
通讯作者：
Xinglong Wu;Jiyang Fan;T. Qiu;Xiaopei Yang;G. Siu;P. Chu
中科院分区：
文献类型：
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作者：
Xinglong Wu;Jiyang Fan;T. Qiu;Xiaopei Yang;G. Siu;P. Chu
使用电化学蚀刻的多晶3C-SiC目标和随后的超声波处理在水溶液中，我们已经制造的3C-SiC纳米晶发光的悬浮液。透射电子显微镜观察表明，3C-SiC纳米晶均匀分散在水中，尺寸在1-6 nm范围内。光致发光和光致发光激发光谱研究表明，3C-SiC纳米晶的量子限制与发射带的最大值范围从440至560 nm的明确证据。可调的聚苯乙烯/SiC复合薄膜可以通过将聚苯乙烯加入到3C-SiC纳米晶的甲苯悬浮液中，然后将所得溶液涂覆到Si晶片上来制备。
Using electrochemical etching of a polycrystalline 3C-SiC target and subsequent ultrasonic treatment in water solution, we have fabricated suspensions of 3C-SiC nanocrystallites that luminesce. Transmission electron microscope observations show that the 3C-SiC nanocrystallites, which uniformly disperse in water, have sizes in the range of 1-6 nm. Photoluminescence and photoluminescence excitation spectral examinations show clear evidence for the quantum confinement of 3C-SiC nanocrystallites with the emission band maximum ranging from 440 to 560 nm. Tunable, composite polystyrene/SiC film can be made by adding polystyrene to a toluene suspension of the 3C-SiC nanocrystallites and then coating the resulting solution onto a Si wafer.