Rich Capping Ligand鈥揂g Colloid Interactions

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• 作者：Muqing Ren ; Yuekang Jin ; Wentian Chen ; Weixin Huang
• 刊名：Journal of Physical Chemistry C
• 出版年：2015
• 出版时间：December 10, 2015
• 年：2015
• 卷：119
• 期：49
• 页码：27588-27593
• 全文大小：324K
• ISSN：1932-7455

文摘

Ag cubes, plates, and irregular particles were acquired by the reduction of AgNO₃ respectively in poly(vinylpyrrolidone) (PVP) and ethylene glycol, PVP and dimethylformamide (DMF), and DMF. The surface adsorbates on various Ag colloids were studied with X-ray photoelectron spectroscopy, infrared spectroscopy, and Raman spectroscopy. PVP adsorbs on Ag cubes via its N and O atoms with charge transferring from PVP to Ag. DMF adsorbs on irregular Ag particles in two configurations with charge transferring from Ag to DMF. One adsorbs via the N atom, and the other adsorbs via the N and O atoms. PVP adsorbs on Ag plates via the N atoms with charge transferring from PVP to Ag, whereas DMF adsorbs on Ag plates via the N and O atoms with charge transferring from Ag to DMF. These results reveal rich capping ligand鈥揂g colloid interactions that will strongly affect the surface chemistry and surface-mediated properties of Ag colloids.