ZnSe colloidal nanoparticles synthesized by solvothermal method in the presence of ZrCl4.
ZnSe colloidal nanoparticles synthesized by solvothermal method in the presence of ZrCl4.
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DOI：
10.1016/j.jcis.2008.04.021
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发表时间：
2008-06
影响因子：
9.9
通讯作者：
S. Jana;I. Baek;M. Lim;S. Seok
中科院分区：
文献类型：
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作者：
S. Jana;I. Baek;M. Lim;S. Seok
以醋酸锌和硒粉为前驱体，在高沸点三辛基膦（TOP）、油酸和ZrCl4中通过溶剂热法合成纳米晶ZnSe。随着前体溶液中 ZrCl4 浓度的增加，所产生的 ZnSe 纳米粒子表现出吸收边逐渐向蓝色波长区移动以及晶相从立方相转变为六方相。根据 ZnSe 纳米粒子的 XRD 测量计算得出的粒径随着 ZrCl4 浓度的增加而减小，反应时间为 240 分钟，从 6.5 nm 减小到 5.1 nm，而根据 TEM 测量，在 ZrCl4 为 0.0 mol% 和 22.5 mol% 时，粒径分别为 7.0 到 6.1 nm。通过 SEM-EDS 分析，在固体 ZnSe 纳米颗粒中没有发现锆的痕迹，但 Se 相对于 Zn 的原子百分比随着 ZrCl4 的增加而降低。吸收边蓝移是根据粒径减小来解释的。晶体相变可能是由于两相之间较小的内能差和微晶尺寸减小的综合作用。
The nanocrystalline ZnSe was synthesized from precursors of zinc acetate and Se powder in a high boiling trioctylphosphine (TOP), oleic acid, and ZrCl4by solvothermal method. The produced ZnSe nanoparticles showed gradual absorption edge shifting towards blue wavelength region as well as transformation of crystal phase from cubic to hexagonal with increasing ZrCl4concentrations in precursor solutions. The particle size calculated from XRD measurements for ZnSe nanoparticles was decreased with increasing ZrCl4concentrations for a reaction time of 240 min, from 6.5 nm to 5.1 nm whereas from TEM measurements it was 7.0 to 6.1 nm at 0.0 and 22.5 mol% of ZrCl4, respectively. No trace of zirconium was found in solid ZnSe nanoparticles by SEM-EDS analysis but the atomic percentage of Se with respective to Zn was decreased with increasing ZrCl4. The absorption edge blue shifting was explained on the basis of decreased particle size. The crystal phase transformation may be due to the combined effect of small internal energy difference between the two phases and the decrease of crystallite size.