Size, shape-dependent growth of semiconductor heterostructures mediated by Ag2Se nanocrystals as seeds.
Size, shape-dependent growth of semiconductor heterostructures mediated by Ag2Se nanocrystals as seeds.
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DOI：
10.1021/am4018303
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发表时间：
2013-07
影响因子：
9.5
通讯作者：
Weiwei L. Xu;J. Niu;Hongzhe Wang;Huaibin Shen;L. Li
中科院分区：
文献类型：
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作者：
Weiwei L. Xu;J. Niu;Hongzhe Wang;Huaibin Shen;L. Li
采用溶液-液-固（SLS）法制备了尺寸和形状可控的Ag2Se-ZnS纳米棒和纳米线。以Ag2Se纳米晶（NCs）为种子和催化剂，通过改变Ag2Se纳米晶的直径、前驱体用量、反应时间和反应温度等实验变量，成功合成了粒径在5 ~ 12 nm和长度在15 ~ 600 nm范围内可控的胶体Ag2Se- zns NRs和NWs。Ag2Se纳米碳化物不仅对ZnS纳米碳化物的形状起着关键的控制作用，而且还影响着ZnS纳米碳化物的晶体结构。研究了异质结构Ag2Se-ZnS NWs的相关表面光电压，并证实了Ag2Se-ZnS异质结构的形成。此外，该方法还成功地用于合成Ag2S-ZnS异质结构。
Size- and shape-controllable Ag2Se-ZnS nanorods (NRs) and nanowires (NWs) have been synthesized successfully by the solution-liquid-solid (SLS) method. By using Ag2Se nanocrystals (NCs) as seeds and catalyst, colloidal Ag2Se-ZnS NRs and NWs with controllable diameters and lengths in ranges of 5-12 nm and 15-600 nm were successfully synthesized by altering the experimental variables, such as diameter of Ag2Se NCs, amount of precursor, reaction time, and reaction temperature. The Ag2Se NCs not only played a key role in the control of the shape of ZnS NCs but also influenced the crystal structure of ZnS NCs. The related surface photovoltage of heterostructured Ag2Se-ZnS NWs have also been studied and the formation of Ag2Se-ZnS heterostructure was confirmed. Moreover, this SLS method was successfully exploited to synthesize Ag2S-ZnS heterostructures.