Catalytic gold nanoparticle driven pH specific chemical locomotion

被引：18

作者：

Dey, Krishna Kanti ^{[2
]}

Panda, Biswa Ranjan ^{[3
]}

Paul, Anumita ^{[3
]}

Basu, Saurabh ^{[1
]}

Chattopadhyay, Arun ^{[2
,3
]}

机构：

[1] Indian Inst Technol Guwahati, Dept Phys, Gauhati 781039, India

[2] Indian Inst Technol Guwahati, Ctr Nanotechnol, Gauhati 781039, India

[3] Indian Inst Technol Guwahati, Dept Chem, Gauhati 781039, India

来源：

JOURNAL OF COLLOID AND INTERFACE SCIENCE | 2010年 / 348卷 / 02期

关键词：

H2O2; decomposition; Catalytic motors; Autonomous transport; pH; Nanoparticle; HYDROGEN-PEROXIDE; AUTONOMOUS MOVEMENT; DECOMPOSITION; NANOMOTORS; NANOROTORS; METALS; MOTOR;

D O I：

10.1016/j.jcis.2010.04.070

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070305 [高分子化学与物理];

摘要：

Gold nanoparticle (Au NP) catalyzed decomposition of alkaline hydrogen peroxide has been utilized in driving chemical locomotives in a liquid. Au NPs deposited on spherical micron sized polymer resin beads catalyzed the decomposition of H2O2 in the pH range 9.1-10.8. The O-2 gas bubbles produced in the decomposition moved the beads upward with average velocities that depended on the pH of the solution. The measured average velocity of the bead increased with the increase in pH in the range 9.1-10.8. Above this pH, the self-decomposition of H2O2 produced sufficient bubbles in the medium that made the motion haphazard and thus prevented a clear measurement of the velocity. The observed accelerated motion of the locomotive has been explained by considering the time-dependent growth of O-2 gas bubbles on the polymer, while taking into consideration desorption and other factors. (C) 2010 Elsevier Inc. All rights reserved.

引用

页码：335 / 341

页数：7

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