Highly efficient catalytic microengines: template electrosynthesis of polyaniline/platinum microtubes.

Highly efficient catalytic microtubular engines are synthesized rapidly and inexpensively using an electrochemical growth of bilayer polyaniline/platinum microtubes within the conically shaped pores of a polycarbonate template membrane. These mass-produced microtubular engines are only 8 μm long, are self-propelled at an ultrafast speed (of over 350 body lengths s(-1)), and can operate in very low levels of the hydrogen peroxide fuel (down to 0.2%). The propulsion characteristics and optimization of these microtubular engines are described, along with their efficient operation in different biological environments which holds great promise for biomedical applications.

[1]  Oliver G. Schmidt,et al.  Rolled-up nanotech on polymers: from basic perception to self-propelled catalytic microengines. , 2011, Chemical Society reviews.

[2]  Chad A Mirkin,et al.  Multisegmented one-dimensional nanorods prepared by hard-template synthetic methods. , 2006, Angewandte Chemie.

[3]  Oliver G. Schmidt,et al.  Versatile Approach for Integrative and Functionalized Tubes by Strain Engineering of Nanomembranes on Polymers , 2008 .

[4]  Susana Campuzano,et al.  Micromachine-enabled capture and isolation of cancer cells in complex media. , 2011, Angewandte Chemie.

[5]  O. Schmidt,et al.  Catalytic microtubular jet engines self-propelled by accumulated gas bubbles. , 2009, Small.

[6]  G. Ozin,et al.  Fuel for thought: chemically powered nanomotors out-swim nature's flagellated bacteria. , 2010, ACS nano.

[7]  Stephen J. Ebbens,et al.  In pursuit of propulsion at the nanoscale , 2010 .

[8]  C. R. Martin,et al.  Conical nanopore membranes. Preparation and transport properties. , 2004, Analytical chemistry.

[9]  Martin Pumera,et al.  Magnetic Control of Tubular Catalytic Microbots for the Transport, Assembly, and Delivery of Micro‐objects , 2010 .

[10]  S. Balasubramanian,et al.  Template-assisted fabrication of salt-independent catalytic tubular microengines. , 2010, ACS nano.

[11]  Joseph Wang,et al.  Can man-made nanomachines compete with nature biomotors? , 2009, ACS nano.

[12]  Li Wan,et al.  Tin/Platinum Bimetallic Nanotube Array and its Electrocatalytic Activity for Methanol Oxidation , 2005 .

[13]  Guy Denuault,et al.  Detection of hydrogen peroxide at mesoporous platinum microelectrodes. , 2002, Analytical chemistry.

[14]  N. Fiala.  The greenhouse hamburger. , 2009, Scientific American.

[15]  Samuel Sanchez,et al.  Dynamics of biocatalytic microengines mediated by variable friction control. , 2010, Journal of the American Chemical Society.

[16]  Charles R. Martin,et al.  Template-Synthesized Polyaniline Microtubules , 1994 .

[17]  S. Chakarvarti,et al.  Template synthesis—a membrane based technology for generation of nano-/micro materials: a review , 1998 .

[18]  Samuel Sanchez,et al.  Controlled manipulation of multiple cells using catalytic microbots. , 2011, Chemical communications.

[19]  Filiz Kuralay,et al.  Functionalized micromachines for selective and rapid isolation of nucleic acid targets from complex samples. , 2011, Nano letters.