UV photo-mediated size-focusing synthesis of silver nanoclusters
UV photo-mediated size-focusing synthesis of silver nanoclusters
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DOI：
10.1039/c6ra10892j
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发表时间：
2016-08
期刊：
影响因子：
3.9
通讯作者：
C. Tominaga;H. Hasegawa;Kazuko Yamashita;R. Arakawa;H. Kawasaki
中科院分区：
文献类型：
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作者：
C. Tominaga;H. Hasegawa;Kazuko Yamashita;R. Arakawa;H. Kawasaki
在这项工作中，我们首次报道了光介导型尺寸聚焦合成了谷胱甘肽(SG)保护的原子精密银纳米团簇(AgNCs)。这种光介导的尺寸聚焦合成包括两个步骤：(I)用NaBH4还原银离子，形成多分散的Ag NC中间体；(Ii)在365 nm紫外光照射下，这些中间体通过光中介尺寸聚焦，生成单分散的Ag32(SG)19纳米管。研究了光在纳米银纳米颗粒尺寸聚焦合成中的作用。由于银的紫外光/氧敏感特性，我们已经证明了365 nm紫外光在空气/氧气中的照射是通过光介导的尺寸聚焦过程合成定义良好的银纳米管的一个重要参数。
In this work, we first report the photo-mediated size-focusing synthesis of glutathione (SG)-protected atomically precise Ag nanoclusters (Ag NCs). This photo-mediated size-focusing synthesis comprises a two-step protocol: (i) the reduction of Ag ions by NaBH4 to form polydisperse Ag NC intermediates and (ii) the subsequent photo-mediated size-focusing of these intermediates under 365 nm UV irradiation, producing monodisperse Ag32(SG)19 NCs. The role of light in the size-focusing synthesis of Ag NCs was investigated. We have demonstrated that 365 nm UV light irradiation under air/O2 is an important parameter for the synthesis of well-defined Ag NCs via the photo-mediated size-focusing process due to the UV light/oxygen-sensitive properties of Ag.