UV photo-mediated size-focusing synthesis of silver nanoclusters

作者：Tominaga C; Hasegawa H; Yamashita K; Arakawa R; Kawasaki H^*

来源：RSC Advances, 2016, 6(77): 73600-73604.

DOI：10.1039/c6ra10892j

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 Ag-32(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/O-2 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.

• 出版日期2016