Ligands Exchange Process on Gold Nanoparticles in Acetone Solution

International Conference on Computer Information and Automation Engineering

计算机科学;运输工程

Hu, C.L.^1 ; Mu, Y.Y.^1 ; Bian, Z.C.^1 ; Luo, Z.H.^1 ; Luo, K.^1 ; Huang, A.Z.^2

Guangxi Key Lab. of Universities for Clean Metall. Compreh. Utilization of Nonferrous Metal Resource, Collab. Innov. Ctr. for Explor. of Hidden Nonfer. Metal Depos. and Devmt. of New Mat. in Guangxi, Guilin University of Technology, Guilin

541004, China^1

Humanwell Healthcare(GROUP)CO., LTD, Wuhan

430075, China^2

关键词: Acetone solution;    Differential capacity;    Electrochemical analysis;    Gold nanoparticles (GNPs);    Hydrophilic and hydrophobic;    Hydrophilic groups;    Hydrophobic groups;    Stable adsorption;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/359/1/012038/pdf
DOI  :  10.1088/1757-899X/359/1/012038

学科分类：计算机科学（综合）

来源: IOP

【 摘 要 】

The ligands exchange process on gold nanoparticles (GNPs) was proceeded by using hydrophobic group (PPh3) and hydrophilic group (THPO) in acetone solution. The FTIR and XPS results demonstrated that part of THPO was replaced by PPh3 which was dissolved in polar solution (acetone); the results were in accordance with the electrochemical analysis where the differential capacity decreased with increasing exchange time. After 12 h, the exchange process terminated and the final ratio of PPh3 and THPO was about 1.4: 1. This ratio remained unchanged although the PPh3 and THPO modified GNPs re-dispersed in the PPh3 acetone solution demonstrating the stable adsorption of both ligands after exchanging for 12 h. The TEM images showed that the gold nanoparticles were self-assembled from scattered to arranged morphology due to the existence of hydrophilic and hydrophobic ligands and led to Janus gold nanoparticles.