Self-catalytic growth and photoluminescence properties of ZnS nanostructures

Self-catalytic growth and photoluminescence properties of ZnS nanostructures
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ZnS纳米结构的自催化生长和光致发光特性

DOI:
10.1016/j.materresbull.2005.04.004
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发表时间:
2005-08
影响因子:
5.4
通讯作者:
陈林
陈林
中科院分区:
材料科学2区
文献类型:
--
作者:
何照元;苏勇;陈翌庆;姜晶;蔡东;陈林

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采用h2辅助热蒸发技术实现了均匀纤锌矿ZnS纳米结构的批量生产。x射线衍射(XRD)分析、扫描电子显微镜(SEM)和高分辨率透射电子显微镜(HRTEM)观察表明,ZnS纳米结构由纳米带、纳米片和六方纤锌矿结构组成。合成的纳米带的长度为几十微米,宽度为几百纳米。由于在合成过程中没有引入金属催化剂和模板,因此提出了自催化气-液-固(VLS)生长和气-固(VS)生长的方法来制备ZnS纳米结构。室温光致发光测试表明,合成的ZnS纳米结构在443nm波长处具有较强的发射带,这可能是由于多种表面态的存在所致。
Mass production of uniform wurtzite ZnS nanostructures has been achieved by a H2-assisted thermal evaporation technique. X-ray diffraction (XRD) analyses, scanning electron microscopy (SEM) and high-resolution transmission electron microscopy (HRTEM) observations show that the ZnS nanostructures consist of nanobelts, nanosheets with a hexagonal wurtzite structure. The as-synthesized nanobelts have a length of several tens of micrometers and a width of several hundreds of nanometers. Self-catalytic vapor–liquid–solid (VLS) growth and vapor-solid (VS) growth are proposed for the formation of the ZnS nanostructures because neither a metal catalyst nor a template was introduced in the synthesis process. Room-temperature photoluminescence measurement indicates that the synthesized ZnS nanostructures have a strong emission band at a wavelength of 443nm, which may be attributed to the presence of various surface states.
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