Seawater-driven magnesium based Janus micromotors for environmental remediation.

We describe the use of seawater as fuel to propel Janus micromotors. The new micromotors consist of biodegradable and environmentally friendly magnesium microparticles and a nickel-gold bilayer patch for magnetic guidance and surface modification. Such seawater-driven micromotors, which utilize macrogalvanic corrosion and chloride pitting corrosion processes, eliminate the need for external fuels to offer efficient and prolonged propulsion towards diverse applications in aquatic environments.

[1]  Wei Gao,et al.  Nanomotor-based biocatalytic patterning of helical metal microstructures. , 2013, Nanoscale.

[2]  M. Pumera.  Electrochemically powered self-propelled electrophoretic nanosubmarines. , 2010, Nanoscale.

[3]  Susana Campuzano,et al.  Bacterial isolation by lectin-modified microengines. , 2012, Nano letters.

[4]  Alberto Escarpa,et al.  Superhydrophobic alkanethiol-coated microsubmarines for effective removal of oil. , 2012, ACS nano.

[5]  Ryan Pavlick,et al.  Intelligent, self-powered, drug delivery systems. , 2013, Nanoscale.

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

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

[8]  Joseph Wang,et al.  Nanomachines: Fundamentals and Applications , 2013 .

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

[10]  E. Fullerton,et al.  Cargo-towing fuel-free magnetic nanoswimmers for targeted drug delivery. , 2012, Small.

[11]  Sirilak Sattayasamitsathit,et al.  Rapid delivery of drug carriers propelled and navigated by catalytic nanoshuttles. , 2010, Small.

[12]  Joseph Wang,et al.  Hydrogen-bubble-propelled zinc-based microrockets in strongly acidic media. , 2012, Journal of the American Chemical Society.

[13]  Yunchang Xin,et al.  Influence of aggressive ions on the degradation behavior of biomedical magnesium alloy in physiological environment. , 2008, Acta biomaterialia.

[14]  Joseph Wang,et al.  Multi-fuel driven Janus micromotors. , 2013, Small.

[15]  Martin Pumera,et al.  Nanorobots: the ultimate wireless self-propelled sensing and actuating devices. , 2009, Chemistry, an Asian journal.

[16]  Alexander Kuhn,et al.  Electric field-induced chemical locomotion of conducting objects. , 2011, Nature communications.

[17]  Allen Pei,et al.  Water-driven micromotors. , 2012, ACS nano.

[18]  G. Song,et al.  Understanding Magnesium Corrosion—A Framework for Improved Alloy Performance , 2003 .

[19]  G. Frankel.  Pitting Corrosion of Metals A Review of the Critical Factors , 1998 .

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

[21]  Giehyeon Lee,et al.  Reaction of zero-valent magnesium with water: Potential applications in environmental remediation , 2013 .

[22]  Wei Gao,et al.  Nano/Microscale motors: biomedical opportunities and challenges. , 2012, ACS nano.

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

[24]  R. Tunold,et al.  The corrosion of magnesium in aqueous solution containing chloride ions , 1977 .

[25]  J. Kruger,et al.  Corrosion of magnesium , 1993 .

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

[27]  Martin Pumera,et al.  Self-propelled nanojets via template electrodeposition. , 2013, Nanoscale.

[28]  G. Song,et al.  The anodic dissolution of magnesium in chloride and sulphate solutions , 1997 .

[29]  Alexander Kuhn,et al.  Propulsion of microobjects by dynamic bipolar self-regeneration. , 2010, Journal of the American Chemical Society.

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

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

[32]  Sirilak Sattayasamitsathit,et al.  Highly efficient catalytic microengines: template electrosynthesis of polyaniline/platinum microtubes. , 2011, Journal of the American Chemical Society.