Nanoparticle Capping Agent Controlled Electron-Transfer Dynamics in Ionic Liquids

作者：Tanner Eden E L; Batchelor McAuley Christopher; Compton Richard G

来源：Chemistry - A European Journal, 2016, 22(17): 5976-5981.

DOI：10.1002/chem.201505117

• capping agents
• ionic liquids
• polymer-gating
• nanoparticles
• single nanoparticle impacts

Herein, we report a change in the mechanism of the oxidation of silver nanoparticles (Ag NPs) with the molecular weight of a poly(ethylene) glycol (PEG) capping agent. Characterisation of the modified nanoparticles is undertaken using dynamic light scattering and UV/Vis spectroscopy. Electrochemical analyses reveal that the oxidation of 6000molecular weight (MW) PEG is consistent with a polymer-gated mechanism, whilst for 2000MW PEG the polymer does not hinder the oxidation. The 10,000MW PEG Ag NPs are rendered almost electrochemically inactive. This study demonstrates the ability to alter and better understand the electron-transfer mechanism in a room temperature ionic liquid (RTIL) by systematically altering the capping agent.

• 出版日期2016-4-18