NDLI: Optic and catalytic properties of gold nanoparticles tuned by homopolymers

Content Provider	Springer Nature Link
Author	Chen, Xi Zhao, DongYun Zhao, LiZhi An, YingLi Ma, RuJiang Shi, LinQi He, QiJun Chen, Li
Copyright Year	2009
Abstract	Gold nanoparticles (GNs) are prepared through in situ reduction using NaBH$_{4}$ in the presence of homopolymer PDMAEMA. The sizes of the GNs can be adjusted by alternating the molar ratio of gold to DMAEMA. Pure PDMAEMA aqueous solution shows a phase-transition at 50°C at pH 10 and 25°C at pH 14, while PDMAEMA-supported GNs aqueous solution shows a phase-transition at 47°C at pH 10 because of the increasing hydrophobic property resulting from GNs. Due to the pH and temperature-responsible characteristics of PDMAEMA, the resulting PDMAEMA-supported GNs exhibit pH adjustable temperature-responsive characteristics in optic and catalytic aspects. Under an acidic condition (pH 2), the GNs show unchanged surface Plasmon absorbance with a peak of 518 nm in a temperature range from 20 to 65°C. Under a basic condition (pH 10), the GNs first show the same absorbance with a peak at 518 nm in a temperature range from 20 to 40°C, and then the absorbance red shifts from 518 to 545 nm as temperature increases from 40 to 65°C. When the GNs are used as catalysts to catalyze the reduction of p-nitrophenol, the catalytic activity can be adjusted by changing the permeation of reactants in the PDMAEMA layer at low and high temperatures, respectively.
Starting Page	1372
Ending Page	1381
Page Count	10
File Format	PDF
ISSN	10069291
Journal	Science in China Series B: Chemistry
Volume Number	52
Issue Number	9
e-ISSN	18622771
Language	English
Publisher	SP Science in China Press
Publisher Date	2009-09-24
Publisher Place	Heidelberg
Access Restriction	Subscribed
Subject Keyword	gold nanoparticles catalyst homopolymer Chemistry/Food Science
Content Type	Text
Resource Type	Article
Subject	Chemistry

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