Catalytic gold nanoparticle driven pH specific chemical locomotion.

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 H(2)O(2) 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 H(2)O(2) 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.

[1]  Geoffrey A Ozin,et al.  Synthetic self-propelled nanorotors. , 2005, Chemical communications.

[2]  Roland Stracke,et al.  Motor protein-driven unidirectional transport of micrometer-sized cargoes across isopolar microtubule arrays , 2001 .

[3]  Walter F Paxton,et al.  Catalytic nanomotors: remote-controlled autonomous movement of striped metallic nanorods. , 2005, Angewandte Chemie.

[4]  Saurabh Basu,et al.  Chemical Locomotives Based on Polymer Supported Catalytic Nanoparticles , 2008 .

[5]  D. Mckee.  Catalytic decomposition of hydrogen peroxide by metals and alloys of the platinum group , 1969 .

[6]  Joseph Wang,et al.  Carbon-nanotube-induced acceleration of catalytic nanomotors. , 2008, ACS nano.

[7]  Yanyan Cao,et al.  Catalytic nanomotors: autonomous movement of striped nanorods. , 2004, Journal of the American Chemical Society.

[8]  Chad A Mirkin,et al.  Rational design and synthesis of catalytically driven nanorotors. , 2007, Journal of the American Chemical Society.

[9]  Kalayil Manian Manesh,et al.  Ultrafast catalytic alloy nanomotors. , 2008, Angewandte Chemie.

[10]  R. Shukla,et al.  Biocompatibility of gold nanoparticles and their endocytotic fate inside the cellular compartment: a microscopic overview. , 2005, Langmuir : the ACS journal of surfaces and colloids.

[11]  H. Gallard,et al.  Catalytic Decomposition of Hydrogen Peroxide by Fe(III) in Homogeneous Aqueous Solution: Mechanism and Kinetic Modeling , 1999 .

[12]  P. Fischer,et al.  Controlled propulsion of artificial magnetic nanostructured propellers. , 2009, Nano letters.

[13]  H. Craighead,et al.  Powering an inorganic nanodevice with a biomolecular motor. , 2000, Science.

[14]  J. Weiss.  The Free Radical Mechanism in the Reactions of Hydrogen peroxide , 1952 .

[15]  W. P. Davey.  Precision Measurements of the Lattice Constants of Twelve Common Metals , 1925 .

[16]  A. Murugadoss,et al.  A ‘green’ chitosan–silver nanoparticle composite as a heterogeneous as well as micro-heterogeneous catalyst , 2008, Nanotechnology.

[17]  Wallis S. Hamilton,et al.  Forces on a sphere accelerating in a viscous fluid , 1964, Journal of Fluid Mechanics.

[18]  Auke Meetsma,et al.  Catalytic molecular motors: fuelling autonomous movement by a surface bound synthetic manganese catalase. , 2005, Chemical communications.

[19]  T. W. Haas,et al.  THE HOMOGENEOUS BASE-CATALYZED DECOMPOSITION OF HYDROGEN PEROXIDE1 , 1961 .

[20]  Saurabh Basu,et al.  Veering the motion of a magnetic chemical locomotive in a liquid. , 2008, The Journal of chemical physics.

[21]  A. Chattopadhyay,et al.  Au nanoparticles and polyaniline coated resin beads for simultaneous catalytic oxidation of glucose and colorimetric detection of the product. , 2005, Langmuir : the ACS journal of surfaces and colloids.