Visible-Light-Driven BiOI-Based Janus Micromotor in Pure Water.

Light-driven synthetic micro-/nanomotors have attracted considerable attention due to their potential applications and unique performances such as remote motion control and adjustable velocity. Utilizing harmless and renewable visible light to supply energy for micro-/nanomotors in water represents a great challenge. In view of the outstanding photocatalytic performance of bismuth oxyiodide (BiOI), visible-light-driven BiOI-based Janus micromotors have been developed, which can be activated by a broad spectrum of light, including blue and green light. Such BiOI-based Janus micromotors can be propelled by photocatalytic reactions in pure water under environmentally friendly visible light without the addition of any other chemical fuels. The remote control of photocatalytic propulsion by modulating the power of visible light is characterized by velocity and mean-square displacement analysis of optical video recordings. In addition, the self-electrophoresis mechanism has been confirmed for such visible-light-driven BiOI-based Janus micromotors by demonstrating the effects of various coated layers (e.g., Al2O3, Pt, and Au) on the velocity of motors. The successful demonstration of visible-light-driven Janus micromotors holds a great promise for future biomedical and environmental applications.

[1]  Ying Dai,et al.  Engineering BiOX (X = Cl, Br, I) nanostructures for highly efficient photocatalytic applications. , 2014, Nanoscale.

[2]  Carmen C. Mayorga-Martinez,et al.  Nano/micromotors in (bio)chemical science applications. , 2014, Chemical reviews.

[3]  T. Mallouk,et al.  Bipolar electrochemical mechanism for the propulsion of catalytic nanomotors in hydrogen peroxide solutions. , 2006, Langmuir : the ACS journal of surfaces and colloids.

[4]  Mingjun Xuan,et al.  Near Infrared Light-Powered Janus Mesoporous Silica Nanoparticle Motors. , 2016, Journal of the American Chemical Society.

[5]  Changling Yu,et al.  Synthesis and characterization of Pt/BiOI nanoplate catalyst with enhanced activity under visible light irradiation , 2010 .

[6]  V. Montes,et al.  A comparative study of hydrogen photocatalytic production from glycerol and propan-2-ol on M/TiO2 systems (M=Au, Pt, Pd) , 2017 .

[7]  Meilan Pan,et al.  Facet-dependent catalytic activity of nanosheet-assembled bismuth oxyiodide microspheres in degradation of bisphenol A. , 2015, Environmental science & technology.

[8]  Martin Pumera,et al.  Chemical energy powered nano/micro/macromotors and the environment. , 2015, Chemistry.

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

[10]  Xin Xiao,et al.  Facile synthesis of nanostructured BiOI microspheres with high visible light-induced photocatalytic activity , 2010 .

[11]  Wei Wang,et al.  Density and Shape Effects in the Acoustic Propulsion of Bimetallic Nanorod Motors. , 2016, ACS nano.

[12]  Samuel Sánchez,et al.  Enzyme Catalysis To Power Micro/Nanomachines , 2016, ACS nano.

[13]  Thomas E Mallouk,et al.  Schooling behavior of light-powered autonomous micromotors in water. , 2009, Angewandte Chemie.

[14]  Falong Jia,et al.  Facile construction of low-cost flexible solar cells with p-type BiOI nanoflake arrays fabricated via oriented attachment , 2013 .

[15]  Wei Li,et al.  Single-Component TiO2 Tubular Microengines with Motion Controlled by Light-Induced Bubbles. , 2015, Small.

[16]  Marlies Nijemeisland,et al.  Dynamic Loading and Unloading of Proteins in Polymeric Stomatocytes: Formation of an Enzyme-Loaded Supramolecular Nanomotor. , 2016, ACS nano.

[17]  Yan Li,et al.  Light-controlled bubble propulsion of amorphous TiO2/Au Janus micromotors , 2016 .

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

[19]  Wei Wang,et al.  Small power: Autonomous nano- and micromotors propelled by self-generated gradients , 2013 .

[20]  Joseph Wang,et al.  Rocket Science at the Nanoscale. , 2016, ACS nano.

[21]  D. Shu,et al.  Enhanced photocatalytic disinfection of E. coli 8099 using Ag/BiOI composite under visible light irradiation , 2012 .

[22]  Samuel Sánchez,et al.  Graphene-Based Microbots for Toxic Heavy Metal Removal and Recovery from Water , 2016, Nano letters.

[23]  Leilei Xu,et al.  Light-controlled propulsion, aggregation and separation of water-fuelled TiO2/Pt Janus submicromotors and their "on-the-fly" photocatalytic activities. , 2016, Nanoscale.

[24]  Longqiu Li,et al.  Magnetically Propelled Fish-Like Nanoswimmers. , 2016, Small.

[25]  Qiang He,et al.  Superfast Near-Infrared Light-Driven Polymer Multilayer Rockets. , 2016, Small.

[26]  Qiang He,et al.  Recent Progress on Bioinspired Self-Propelled Micro/Nanomotors via Controlled Molecular Self-Assembly. , 2016, Small.

[27]  Wei Wang,et al.  Autonomous motion of metallic microrods propelled by ultrasound. , 2012, ACS nano.

[28]  Allen Pei,et al.  Catalytic iridium-based Janus micromotors powered by ultralow levels of chemical fuels. , 2014, Journal of the American Chemical Society.

[29]  Daniela A Wilson,et al.  Autonomous movement of platinum-loaded stomatocytes. , 2012, Nature chemistry.

[30]  Tristan Tabouillot,et al.  Enzyme molecules as nanomotors. , 2013, Journal of the American Chemical Society.

[31]  Kevin Kaufmann,et al.  Molybdenum Disulfide‐Based Tubular Microengines: Toward Biomedical Applications , 2016 .

[32]  Soichiro Tottori,et al.  Magnetic helical micromachines. , 2013, Chemistry.

[33]  Chiing-Chang Chen,et al.  Synthesis of bismuth oxyiodides and their composites: characterization, photocatalytic activity, and degradation mechanisms , 2015 .

[34]  Wei Gao,et al.  The environmental impact of micro/nanomachines: a review. , 2014, ACS nano.

[35]  Samuel Sanchez,et al.  Enzyme-Powered Hollow Mesoporous Janus Nanomotors. , 2015, Nano letters (Print).

[36]  R. Jin,et al.  Novel noble metal (Rh, Pd, Pt)/BiOX(Cl, Br, I) composite photocatalysts with enhanced photocatalytic performance in dye degradation , 2013 .

[37]  M W Berns,et al.  Effects of ultraviolet exposure and near infrared laser tweezers on human spermatozoa. , 1996, Human reproduction.

[38]  B. Nelson,et al.  Artificial Swimmers Propelled by Acoustically Activated Flagella. , 2016, Nano letters.

[39]  D. Wiersma,et al.  Structured light enables biomimetic swimming and versatile locomotion of photoresponsive soft microrobots. , 2016, Nature materials.

[40]  Sirilak Sattayasamitsathit,et al.  Propulsion of nanowire diodes. , 2010, Chemical communications.

[41]  Fei Peng,et al.  Micro- and nano-motors for biomedical applications. , 2014, Journal of materials chemistry. B.

[42]  M. Ueda,et al.  UV-induced skin damage. , 2003, Toxicology.

[43]  Samuel Sánchez,et al.  Chemically powered micro- and nanomotors. , 2015, Angewandte Chemie.

[44]  Flory Wong,et al.  Progress toward Light-Harvesting Self-Electrophoretic Motors: Highly Efficient Bimetallic Nanomotors and Micropumps in Halogen Media. , 2016, ACS nano.

[45]  Hironori Arakawa,et al.  Direct splitting of water under visible light irradiation with an oxide semiconductor photocatalyst , 2001, Nature.

[46]  Haiquan Xie,et al.  Recent advances in BiOX (X = Cl, Br and I) photocatalysts: synthesis, modification, facet effects and mechanisms , 2014 .

[47]  Samuel Sánchez,et al.  Reversed Janus Micro/Nanomotors with Internal Chemical Engine , 2016, ACS nano.