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首页> 外文期刊>Physica, B. Condensed Matter >Controllable synthesis of water-soluble luminescent Cd_xZn _(1-x)S nanocrystals
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Controllable synthesis of water-soluble luminescent Cd_xZn _(1-x)S nanocrystals

机译：水溶性发光Cd_xZn _（1-x）S纳米晶体的可控合成

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摘要

Multicolored luminescent Cd_xZn_(1-x)S nanocrystals in aqueous solution have been controllably synthesized with thioglycollic acid (TGA) as a surface modifier. The Cd_xZn_(1-x)S nanocrystals were characterized by X-ray diffraction (XRD) patterns, transmission electron microscope (TEM), energy dispersive X-ray spectroscopy (EDX), Fourier transform infrared (FT-IR) spectrum, ultravioletvisible (UVvis) spectra, and photoluminescence (PL) spectra. From a combination of TEM data and computing methods according to UVvis spectra and XRD patterns, the particle size of CdS nanocrystal was found to be about 4 nm. Homogeneous Cd_xZn _(1-x)S nanocrystals have the same well-crystallized cubic lattice structure. FT-IR spectrum indicates that the carboxyl group of TGA is coated on the surface of nanocrystals successfully. The composition dependent UVvis and PL spectra reveal that the series Cd_xZn_(1-x)S nanocrystals exhibit good optical properties, which can be modulated by changing the cation molar ratio of Zn:Cd in the reactants. The green and yellow luminescence of Cd_xZn_(1-x)S nanocrystals is brightly eye-viewable under UV irradiation.
机译：以巯基乙酸（TGA）为表面改性剂，可控地合成了水溶液中的彩色发光Cd_xZn_（1-x）S纳米晶体。 Cd_xZn_（1-x）S纳米晶体的特征在于X射线衍射（XRD）图，透射电子显微镜（TEM），能量色散X射线光谱（EDX），傅立叶变换红外（FT-IR）光谱，紫外可见（ UVvis）光谱和光致发光（PL）光谱。通过结合TEM数据和根据UVvis光谱和XRD图的计算方法，发现CdS纳米晶体的粒径为约4nm。同质Cd_xZn _（1-x）S纳米晶体具有相同的良好结晶的立方晶格结构。 FT-IR光谱表明TGA的羧基被成功地包覆在纳米晶体的表面。取决于组成的UVvis和PL光谱表明，Cd_xZn_（1-x）S系列纳米晶体显示出良好的光学性质，可以通过改变反应物中Zn：Cd的阳离子摩尔比来调节。在紫外线照射下，Cd_xZn_（1-x）S纳米晶体的绿色和黄色发光可见。

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