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首页> 外文期刊>Journal of Crystal Growth >A novel one-pot route for the synthesis of water-soluble cadmium selenide nanoparticles
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A novel one-pot route for the synthesis of water-soluble cadmium selenide nanoparticles

机译：一种新颖的一锅法合成水溶性硒化镉纳米颗粒

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摘要

A novel, facile one-pot synthetic route to highly water dispersible and potentially biocompatible CdSe nanoparticles is reported. The monodispersed CdSe particles are passivated by cysteine, with water being the solvent. This route involves the reaction of selenium powder with sodium borohydride to produce selenide ions, followed by the addition of a cadmium salt and L-cysteine ethyl ester hydrochloride. The nanoparticles formed show quantum confinement fluorescing in the blue region. Fourier transform infrared spectroscopy study shows that CdSe nanoparticles are capped through mercapto group of the amino acid cysteine whilst its free amino and carboxylate groups make it amenable to bioconjugation establishing the possibility of using these as fluorescent biomarkers. High-resolution transmission electron spectroscopy images of these materials show well-defined, crystalline nanosized particles. Energy dispersive spectroscopy spectra confirm the presence of the corresponding elements.
机译：据报道，一种新颖，简便的一锅合成路线可实现高度水分散性和潜在生物相容性的CdSe纳米粒子。单分散的CdSe颗粒被半胱氨酸钝化，水为溶剂。该路线涉及硒粉与硼氢化钠反应生成硒离子，然后添加镉盐和L-半胱氨酸乙酯盐酸盐。形成的纳米颗粒在蓝色区域显示出量子限制发荧光。傅里叶变换红外光谱研究表明，CdSe纳米颗粒通过氨基酸半胱氨酸的巯基基团封端，而其游离氨基和羧酸根基团使其易于生物共轭，从而确立了将其用作荧光生物标记物的可能性。这些材料的高分辨率透射电子光谱图像显示了定义明确的结晶纳米尺寸颗粒。能量色散光谱证实了相应元素的存在。

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