Room temperature, water-based, microreactor synthesis of gold and silver nanoparticles
Room temperature, water-based, microreactor synthesis of gold and silver nanoparticles
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DOI：
10.1504/ijnt.2009.024645
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发表时间：
2009-04
影响因子：
0.5
通讯作者：
Akanksha D. Singh;M. Shirolkar;N. Lalla;C. Malek;S. Kulkarni
中科院分区：
文献类型：
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作者：
Akanksha D. Singh;M. Shirolkar;N. Lalla;C. Malek;S. Kulkarni
报道了在室温下用聚二甲基硅氧烷（PDMS）微反应器合成金和银纳米粒子。该反应已经使用金属盐水溶液和硼氢化物还原剂与柠檬酸三钠作为封端剂进行。研究了还原剂浓度对纳米粒子光学性质的影响。通过紫外-可见吸收光谱和透射电子显微镜对纳米颗粒进行了表征。UV-Vis吸收光谱显示随着还原剂浓度的增加，光谱发生蓝移，这表明随着还原剂量的增加，尺寸减小。在类似的反应条件下，与常规的分批合成相比，微反应器合成中的纳米颗粒的尺寸均匀地更小。微反应器合成非常快，并以优异的再现性改善了单分散性。
Synthesis of gold and silver nanoparticles at room temperature using a polydimethylsiloxane (PDMS) microreactor has been reported. The reactions have been performed using aqueous metal salt solutions and borohydride reducing agent with tri-sodium citrate as the capping agent. Effect of concentration of reducing agent on the optical properties of the nanoparticles has been investigated. The nanoparticles were characterised by UV-Vis absorption spectroscopy and transmission electron microscopy. The UV-Vis absorption spectra show a blue shift in the spectra with increasing concentration of the reducing agent, which indicates reduction in the size with increased amount of the reducing agent. The sizes of the nanoparticles are uniformly smaller in the microreactor synthesis as compared to those in the conventional batch synthesis, under similar reaction conditions. The microreactor synthesis is very fast and improves the monodispersity with excellent reproducibility.