纳米棒
纤锌矿晶体结构
材料科学
纳米颗粒
乙二胺
带隙
光致发光
锌
吸收(声学)
纳米技术
分析化学(期刊)
结晶学
无机化学
光电子学
化学
冶金
复合材料
色谱法
作者
Bo Hee Hwang,Hongmei Xu,Su Jin Park,Sung Eun Choi,Sahn Nahm,Youn Woo Hong,Jong Hoo Paik,Tae Ho Shin,Jeong Su Kang
标识
DOI:10.1016/j.ceramint.2016.04.088
摘要
Hexagonal wurtzite (HWZ) ZnS nanorods were formed in specimens with a S/Zn ratio of 1.3, synthesized at temperatures ≥200 °C in a solution containing 80 vol% water and 20 vol% of ethylenediamine (EN). In contrast, HWZ ZnS nanoparticles were formed in specimens synthesized at temperatures lower than 200 °C. Also, cubic zinc blende (CZB) ZnS nanoparticles were formed in specimen synthesized in water. The absorption peak for the HWZ nanorods and CZB ZnS nanoparticles was at wavelength of 325 nm and 339 nm, respectively, indicating that the band gap energy of the former is larger than that of the latter. Moreover, the HWZ ZnS exhibited two emission peaks at 474 nm and 580 nm. The peak at 474 nm is attributed to Zn vacancies but the origin of the peak at 580 nm remains undetermined. Since the intensity of the emission peak at 580 nm was significantly higher for the HWZ nanoparticles than for nanorods, this peak might be associated with defects in the HWZ ZnS nanoparticles.
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