CdS nanocrystal induced chemiluminescence: reaction mechanism and applications
CdS nanocrystal induced chemiluminescence: reaction mechanism and applications
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DOI：
10.1088/0957-4484/18/22/225602
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发表时间：
2007-06
期刊：
影响因子：
3.5
通讯作者：
Yongxin Li;Ping Yang;Po Wang;Xue Huang;Lun Wang
中科院分区：
文献类型：
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作者：
Yongxin Li;Ping Yang;Po Wang;Xue Huang;Lun Wang
在水溶液中合成了用巯基乙酸 (MA) 封端的水溶性 CdS 纳米晶体 (NC)。过氧化氢直接氧化 MA 封端的 CdS NC，并在碱性条件下产生强烈的化学发光（CL）发射。研究发现，CdS NCs 的发光强度与尺寸有关，并且发光强度随着 CdS NCs 尺寸的增加而增加。使用紫外可见光谱、CL 光谱、光致发光（PL）光谱和透射电子显微镜（TEM）来研究 CL 反应机理。此外，还仔细研究了反应物浓度、表面活性剂以及一些生物分子和金属离子的影响。一些生物分子和金属离子被观察到抑制H2O2-CdS NCs系统的CL信号，这使得该系统适用于此类物种的检测。
Water-soluble CdS nanocrystals (NCs) capped with mercaptoacetic acid (MA) were synthesized in aqueous solution. Hydrogen peroxide directly oxidized the MA-capped CdS NCs and produced strong chemiluminescence (CL) emission in basic conditions. It was found that the CL of CdS NCs was size-dependent, and the CL intensity increased with increasing CdS NCs size. UV–visible spectra, CL spectra, photoluminescence (PL) spectra, and transmission electron microscopy (TEM) were used to investigate the CL reaction mechanism. Moreover, the effects of reactant concentrations, surfactants, and some biological molecules and metal ions were carefully investigated. Some biological molecules and metal ions were observed to inhibit the CL signal of the H2O2–CdS NCs system, which makes it applicable for the detection of such species.