The nature of the capping ligands used and the strength of their interactions with the surface atoms of the nanoparticles (NPs) impact greatly on the material properties and the stability of the resulting NPs. The structural analysis revealed that all the as‐prepared CdTe NPs samples had a zinc blende crystal structure of different phases. The glutathione and L‐cysteine capped CdTe NPs had the same zinc blende phase (JCPDS no. 75–2086) while thioglycolic acid capped and co‐capped CdTe NPs possessed another zinc blende phase (JCPDS no. 75–2083). The calculated crystallite sizes were in the range 2–26 nm for all the samples. The optical spectroscopy studies showed various properties when different capping ligands were used. The band gap energies for all the as‐prepared CdTe NPs confirmed the results obtained from the X‐ray diffraction. The band gap energies were in the range of 2.39–3.34 eV for all the as‐prepared CdTe NPs.

中文翻译：

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封端配体对通过简单湿化学工艺制备的CdTe纳米颗粒的结构，光学和发光性质的影响

所使用的封端配体的性质及其与纳米颗粒（NPs）的表面原子相互作用的强度对材料性能和所得NPs的稳定性影响很大。结构分析表明，所有制备的CdTe NP样品均具有不同相的锌共混物晶体结构。谷胱甘肽和L-半胱氨酸封端的CdTe NP具有相同的锌共混相（JCPDS编号75-2086），而巯基乙酸封端和共封端的CdTe NP具有另一个锌共混相（JCPDS 75-2083）。对于所有样品，计算出的微晶尺寸在2–26 nm范围内。当使用不同的封端配体时，光谱学研究显示出各种性质。所有制备的CdTe NP的带隙能证实了从X射线衍射获得的结果。