The Experts below are selected from a list of 5193 Experts worldwide ranked by ideXlab platform

Joseph Wang - One of the best experts on this subject based on the ideXlab platform.

  • ultrafast growth and locomotion of dandelion like microswarms with tubular Micromotors
    Small, 2020
    Co-Authors: Hui Shen, Joseph Wang, Ying Wei, Hanmin Peng, Wenjuan Liu
    Abstract:

    Dynamic assembly and cooperation represent future frontiers for next generations of advanced micro/nano robots, but the required local interaction and communication cannot be directly translated from macroscale robots through the minimization because of tremendous technological challenges. Here, an ultrafast growth and locomotion methodology is presented for dandelion-like microswarms assembled from catalytic tubular Micromotors. With ultrasound oscillation of self-generated bubbles, such microswarms could overcome the tremendous and chaotic drag force from extensive and disordered bubble generation in single units. Tubular MnO2 micromotor individuals headed by self-generated oxygen bubbles are ultrasonically driven to swim rapidly in surfactant-free H2 O2 solutions. A large bubble core fused from multiple microbubbles is excited to oscillate and the resultant local intensified acoustic field attracts the individual Micromotors to school around it, leading to a simultaneous growth of dandelion-like microswarms. The bubble-carried micromotor groups driven by ultrasound could swarm at a zigzag pattern with an average speed of up to 50 mm s-1 , which is validated in low H2 O2 concentrations. Additionally, such superfast locomotion could be ultrasonically modulated on demand. The ultrafast microswarm growth and locomotion strategy offers a new paradigm for constructing distinct dynamic assemblies and rapid transmission of artificial microrobots, paving the way to a myriad of promising applications.

  • multicompartment tubular Micromotors toward enhanced localized active delivery
    Advanced Materials, 2020
    Co-Authors: Berta Esteban-fernández De Ávila, Emil Karshalev, Liangfang Zhang, Doris E Ramirezherrera, Rodolfo Mundacauribe, Bryan Nguyen, Ronnie H Fang, Miguel Angel Lopezramirez, Xiaoli Wei, Joseph Wang
    Abstract:

    A tubular micromotor with spatially resolved compartments is presented toward efficient site-specific cargo delivery, with a back-end zinc (Zn) propellant engine segment and an upfront cargo-loaded gelatin segment further protected by a pH-responsive cap. The multicompartment Micromotors display strong gastric-powered propulsion with tunable lifetime depending on the Zn segment length. Such propulsion significantly enhances the motor distribution and retention in the gastric tissues, by pushing and impinging the front-end cargo segment onto the stomach wall. Once the micromotor penetrates the gastric mucosa (pH ≥ 6.0), its pH-responsive cap dissolves, promoting the autonomous localized cargo release. The fabrication process, physicochemical properties, and propulsion behavior are systematically tested and discussed. Using a mouse model, the multicompartment motors, loaded with a model cargo, demonstrate a homogeneous cargo distribution along with approximately four-fold enhanced retention in the gastric lining compared to monocompartment motors, while showing no apparent toxicity. Therapeutic payloads can also be loaded into the pH-responsive cap, in addition to the gelatin-based compartment, leading to concurrent delivery and sequential release of dual cargos toward combinatorial therapy. Overall, this multicompartment micromotor system provides unique features and advantages that will further advance the development of synthetic Micromotors for active transport and localized delivery of biomedical cargos.

  • effective removal of inorganic and organic heavy metal pollutants with poly amino acid based Micromotors
    Nanoscale, 2020
    Co-Authors: Ting Hou, Joseph Wang, Minfeng Zhou, Jie Liu, Xiaoli Zheng, Xiaolei Wang
    Abstract:

    The increasing extent of heavy metal pollution all over the world has resulted in many serious environmental and public health problems. To solve these problems, effective technologies for water treatment are urgently needed. Recent efforts have focused on the development of self-driven micro/nanomotors for eliminating inorganic and organic pollutants in an aqueous system. These synthetic micro/nanomotors can increase mass transfer through the transportation of reactive species, leading to higher decontamination rates. Here, we report a surface-tunable poly(amino acid) (PAA)-based micromotor. The property of the outer layer can be adjusted by changing the type and proportion of amino acids according to real requirements. Three kinds of Micromotors are fabricated, which consist of a microtube composed of PAAs (i.e., polyaspartic acid (PAsp), polycysteine (PCys) or a copolymer of both (PAsp-Cys)), a thin Ni intermediate layer, and a Pt inner layer. Due to the presence of various side-chain functional groups (e.g., amino, carboxyl, and sulfhydryl) on the surface of the poly(amino acid)s, these Micromotors can be used as effective scavengers for the removal of heavy metals (i.e., Cd2+, Pb2+ and methylmercury). Compared with PAsp and PCys Micromotors, the PAsp-Cys micromotor shows good acid resistance and can simultaneously adsorb various kinds of heavy metals with high removal efficiency. The outer layer of the surface-tunable micromotor has good biocompatibility and adsorption efficiency, which holds considerable promise for environmental and biomedical applications.

  • Multigear Bubble Propulsion of Transient Micromotors.
    Research (Washington D.C.), 2020
    Co-Authors: Amir Nourhani, Emil Karshalev, Fernando Soto, Joseph Wang
    Abstract:

    Transient, chemically powered Micromotors are promising biocompatible engines for microrobots. We propose a framework to investigate in detail the dynamics and the underlying mechanisms of bubble propulsion for transient chemically powered Micromotors. Our observations on the variations of the micromotor active material and geometry over its lifetime, from initial activation to the final inactive state, indicate different bubble growth and ejection mechanisms that occur stochastically, resulting in time-varying micromotor velocity. We identify three processes of bubble growth and ejection, and in analogy with macroscopic multigear machines, we call each process a gear. Gear 1 refers to bubbles that grow on the micromotor surface before detachment while in Gear 2 bubbles hop out of the micromotor. Gear 3 is similar in nature to Gear 2, but the bubbles are too small to contribute to micromotor motion. We study the characteristics of these gears in terms of bubble size and ejection time, and how they contribute to micromotor displacement. The ability to tailor the shell polarity and hence the bubble growth and ejection and the surrounding fluid flow is demonstrated. Such understanding of the complex multigear bubble propulsion of transient chemical Micromotors should guide their future design principles and serve for fine tuning the performance of these Micromotors.

  • Motile Micropump Based on Synthetic Micromotors for Dynamic Micropatterning
    ACS Applied Materials & Interfaces, 2019
    Co-Authors: Xiaocong Chang, Chuanrui Chen, Yuyan Liang, Dekai Zhou, Haocheng Wang, Guangyu Zhang, Joseph Wang
    Abstract:

    Micropump systems show great potential on the micropatterning process as a result of remarkable performance and functionality. However, existing micropumps cannot be employed as direct writing tools to perform the complex micropatterning process because of their lacking motility and controllability. Here, we propose a motile micropump system based on the combination of a water-driven ZnO/Ni/polystyrene Janus micromotor with a traditional immobilized micropump. This novel motile micropump system can translate the trajectory of Janus Micromotors into predefined micropatterns by pumping away passive silica particles around the micromotor under the effect of diffusiophoresis. The resolution and efficiency of the micropatterning process can be regulated by controlling the diameters of Janus Micromotors. Diverse surface micropatterns can be fabricated though remote magnetic control of the motile micropump system. Such ability to transform the versatile motile micropump into predetermined surface micropatterns creates new opportunities for mask-free micropatterning.

Renfeng Dong - One of the best experts on this subject based on the ideXlab platform.

  • One body, two hands: photocatalytic function- and Fenton effect-integrated light-driven Micromotors for pollutant degradation
    Nanoscale, 2019
    Co-Authors: Jiajia Wang, Qianxian Yang, Zijun Bi, Qiying Liang, Renfeng Dong, Qinglong Wang, Huiying Wu, Chun Wang, Yongfeng Mei, Yue-peng Cai
    Abstract:

    The threat of water pollution represents a serious global concern and requires rapid and efficient neutralization methods. Herein, we report novel two-in-one light-driven Micromotors, i.e., light-driven TiO2-Fe Janus Micromotors with both photocatalysis and photo-Fenton processes, for efficiently degrading organic pollutants in contaminated water. The TiO2-Fe Micromotors moved rapidly by utilizing the photocatalytic H2O2 decomposition over TiO2 under UV irradiation, as well as generating highly reactive oxygen species responsible for the in situ degradation of the organic pollutants into non-harmful products. Notably, such coupling of photocatalysis generated on the TiO2 sides and the photo-Fenton process generated on the Fe sides, along with the rapid movement of these catalytic Janus Micromotors, results in a synergetic effect that can greatly enhance the degradation of organic pollutants. The degradation efficiency of the TiO2-Fe Micromotors is 52-fold that of only Fenton effects, and it is further improved by 40% compared to photocatalytic degradation alone. Considering the excellent advantages of the high efficiency, simple structure, reusability and the bubble-driven property, the new “on-the-fly” TiO2-Fe micromotor-based method has a promising potential for future water cleaning and waste-water treatments.

  • glucose fueled Micromotors with highly efficient visible light photocatalytic propulsion
    ACS Applied Materials & Interfaces, 2019
    Co-Authors: Qinglong Wang, Renfeng Dong, Chun Wang, Wei Gao, Biye Ren, Decheng Chen, Yuying Liang, Yue-peng Cai
    Abstract:

    Synthetic micro/nanomotors fueled by glucose are highly desired for numerous practical applications because of the biocompatibility of their required fuel. However, currently all of the glucose-fueled micro/nanomotors are based on enzyme-catalytic-driven mechanisms, which usually suffer from strict operation conditions and weak propulsion characteristics that greatly limit their applications. Here, we report a highly efficient glucose-fueled cuprous oxide@N-doped carbon nanotube (Cu_2O@N-CNT) micromotor, which can be activated by environment-friendly visible-light photocatalysis. The speeds of such Cu_2O@N-CNT Micromotors can reach up to 18.71 μm/s, which is comparable to conventional Pt-based catalytic Janus Micromotors usually fueled by toxic H_2O_2 fuel. In addition, the velocities of such motors can be efficiently regulated by multiple approaches, such as adjusting the N-CNT content within the Micromotors, glucose concentrations, or light intensities. Furthermore, the Cu_2O@N-CNT Micromotors exhibit a highly controllable negative phototaxis behavior (moving away from light sources). Such motors with outstanding propulsion in biological environments and wireless, repeatable, and light-modulated three-dimensional motion control are extremely attractive for future practical applications.

  • Glucose-Fueled Micromotors with Highly Efficient Visible-Light Photocatalytic Propulsion
    2019
    Co-Authors: Qinglong Wang, Renfeng Dong, Chun Wang, Wei Gao, Biye Ren, Decheng Chen, Yuying Liang, Yue-peng Cai
    Abstract:

    Synthetic micro/nanomotors fueled by glucose are highly desired for numerous practical applications because of the biocompatibility of their required fuel. However, currently all of the glucose-fueled micro/nanomotors are based on enzyme-catalytic-driven mechanisms, which usually suffer from strict operation conditions and weak propulsion characteristics that greatly limit their applications. Here, we report a highly efficient glucose-fueled cuprous oxide@N-doped carbon nanotube (Cu2O@N-CNT) micromotor, which can be activated by environment-friendly visible-light photocatalysis. The speeds of such Cu2O@N-CNT Micromotors can reach up to 18.71 μm/s, which is comparable to conventional Pt-based catalytic Janus Micromotors usually fueled by toxic H2O2 fuel. In addition, the velocities of such motors can be efficiently regulated by multiple approaches, such as adjusting the N-CNT content within the Micromotors, glucose concentrations, or light intensities. Furthermore, the Cu2O@N-CNT Micromotors exhibit a highly controllable negative phototaxis behavior (moving away from light sources). Such motors with outstanding propulsion in biological environments and wireless, repeatable, and light-modulated three-dimensional motion control are extremely attractive for future practical applications

  • light driven au wo3 c janus Micromotors for rapid photodegradation of dye pollutants
    ACS Applied Materials & Interfaces, 2017
    Co-Authors: Qilu Zhang, Renfeng Dong, Yefei Wu, Zihan He
    Abstract:

    A novel light-driven Au-WO3@C Janus micromotor based on colloidal carbon WO3 nanoparticle composite spheres (WO3@C) prepared by one-step hydrothermal treatment is described. The Janus Micromotors can move in aqueous media at a speed of 16 μm/s under 40 mW/cm2 UV light due to diffusiophoretic effects. The propulsion of such Au-WO3@C Janus Micromotors (diameter ∼ 1.0 μm) can be generated by UV light in pure water without any external chemical fuels and readily modulated by light intensity. After depositing a paramagnetic Ni layer between the Au layer and WO3, the motion direction of the micromotor can be precisely controlled by an external magnetic field. Such magnetic Micromotors not only facilitate recycling of motors but also promise more possibility of practical applications in the future. Moreover, the Au-WO3@C Janus Micromotors show high sensitivity toward extremely low concentrations of sodium-2,6-dichloroindophenol (DCIP) and Rhodamine B (RhB). The moving speed of motors can be significantly acceler...

  • highly efficient light driven tio2 au janus Micromotors
    ACS Nano, 2016
    Co-Authors: Renfeng Dong, Wei Gao, Qilu Zhang, Allen Pei, Biye Ren
    Abstract:

    A highly efficient light-driven photocatalytic TiO2–Au Janus micromotor with wireless steering and velocity control is described. Unlike chemically propelled Micromotors which commonly require the addition of surfactants or toxic chemical fuels, the fuel-free Janus micromotor (diameter ∼1.0 μm) can be powered in pure water under an extremely low ultraviolet light intensity (2.5 × 10–3 W/cm2), and with 40 × 10–3 W/cm2, they can reach a high speed of 25 body length/s, which is comparable to common Pt-based chemically induced self-electrophoretic Janus Micromotors. The photocatalytic propulsion can be switched on and off by incident light modulation. In addition, the speed of the photocatalytic TiO2–Au Janus micromotor can be accelerated by increasing the light intensity or by adding low concentrations of chemical fuel H2O2 (i.e., 0.1%). The attractive fuel-free propulsion performance, fast movement triggering response, low light energy requirement, and precise motion control of the TiO2–Au Janus photocataly...

Biye Ren - One of the best experts on this subject based on the ideXlab platform.

  • glucose fueled Micromotors with highly efficient visible light photocatalytic propulsion
    ACS Applied Materials & Interfaces, 2019
    Co-Authors: Qinglong Wang, Renfeng Dong, Chun Wang, Wei Gao, Biye Ren, Decheng Chen, Yuying Liang, Yue-peng Cai
    Abstract:

    Synthetic micro/nanomotors fueled by glucose are highly desired for numerous practical applications because of the biocompatibility of their required fuel. However, currently all of the glucose-fueled micro/nanomotors are based on enzyme-catalytic-driven mechanisms, which usually suffer from strict operation conditions and weak propulsion characteristics that greatly limit their applications. Here, we report a highly efficient glucose-fueled cuprous oxide@N-doped carbon nanotube (Cu_2O@N-CNT) micromotor, which can be activated by environment-friendly visible-light photocatalysis. The speeds of such Cu_2O@N-CNT Micromotors can reach up to 18.71 μm/s, which is comparable to conventional Pt-based catalytic Janus Micromotors usually fueled by toxic H_2O_2 fuel. In addition, the velocities of such motors can be efficiently regulated by multiple approaches, such as adjusting the N-CNT content within the Micromotors, glucose concentrations, or light intensities. Furthermore, the Cu_2O@N-CNT Micromotors exhibit a highly controllable negative phototaxis behavior (moving away from light sources). Such motors with outstanding propulsion in biological environments and wireless, repeatable, and light-modulated three-dimensional motion control are extremely attractive for future practical applications.

  • Glucose-Fueled Micromotors with Highly Efficient Visible-Light Photocatalytic Propulsion
    2019
    Co-Authors: Qinglong Wang, Renfeng Dong, Chun Wang, Wei Gao, Biye Ren, Decheng Chen, Yuying Liang, Yue-peng Cai
    Abstract:

    Synthetic micro/nanomotors fueled by glucose are highly desired for numerous practical applications because of the biocompatibility of their required fuel. However, currently all of the glucose-fueled micro/nanomotors are based on enzyme-catalytic-driven mechanisms, which usually suffer from strict operation conditions and weak propulsion characteristics that greatly limit their applications. Here, we report a highly efficient glucose-fueled cuprous oxide@N-doped carbon nanotube (Cu2O@N-CNT) micromotor, which can be activated by environment-friendly visible-light photocatalysis. The speeds of such Cu2O@N-CNT Micromotors can reach up to 18.71 μm/s, which is comparable to conventional Pt-based catalytic Janus Micromotors usually fueled by toxic H2O2 fuel. In addition, the velocities of such motors can be efficiently regulated by multiple approaches, such as adjusting the N-CNT content within the Micromotors, glucose concentrations, or light intensities. Furthermore, the Cu2O@N-CNT Micromotors exhibit a highly controllable negative phototaxis behavior (moving away from light sources). Such motors with outstanding propulsion in biological environments and wireless, repeatable, and light-modulated three-dimensional motion control are extremely attractive for future practical applications

  • highly efficient light driven tio2 au janus Micromotors
    ACS Nano, 2016
    Co-Authors: Renfeng Dong, Wei Gao, Qilu Zhang, Allen Pei, Biye Ren
    Abstract:

    A highly efficient light-driven photocatalytic TiO2–Au Janus micromotor with wireless steering and velocity control is described. Unlike chemically propelled Micromotors which commonly require the addition of surfactants or toxic chemical fuels, the fuel-free Janus micromotor (diameter ∼1.0 μm) can be powered in pure water under an extremely low ultraviolet light intensity (2.5 × 10–3 W/cm2), and with 40 × 10–3 W/cm2, they can reach a high speed of 25 body length/s, which is comparable to common Pt-based chemically induced self-electrophoretic Janus Micromotors. The photocatalytic propulsion can be switched on and off by incident light modulation. In addition, the speed of the photocatalytic TiO2–Au Janus micromotor can be accelerated by increasing the light intensity or by adding low concentrations of chemical fuel H2O2 (i.e., 0.1%). The attractive fuel-free propulsion performance, fast movement triggering response, low light energy requirement, and precise motion control of the TiO2–Au Janus photocataly...

Wei Gao - One of the best experts on this subject based on the ideXlab platform.

  • glucose fueled Micromotors with highly efficient visible light photocatalytic propulsion
    ACS Applied Materials & Interfaces, 2019
    Co-Authors: Qinglong Wang, Renfeng Dong, Chun Wang, Wei Gao, Biye Ren, Decheng Chen, Yuying Liang, Yue-peng Cai
    Abstract:

    Synthetic micro/nanomotors fueled by glucose are highly desired for numerous practical applications because of the biocompatibility of their required fuel. However, currently all of the glucose-fueled micro/nanomotors are based on enzyme-catalytic-driven mechanisms, which usually suffer from strict operation conditions and weak propulsion characteristics that greatly limit their applications. Here, we report a highly efficient glucose-fueled cuprous oxide@N-doped carbon nanotube (Cu_2O@N-CNT) micromotor, which can be activated by environment-friendly visible-light photocatalysis. The speeds of such Cu_2O@N-CNT Micromotors can reach up to 18.71 μm/s, which is comparable to conventional Pt-based catalytic Janus Micromotors usually fueled by toxic H_2O_2 fuel. In addition, the velocities of such motors can be efficiently regulated by multiple approaches, such as adjusting the N-CNT content within the Micromotors, glucose concentrations, or light intensities. Furthermore, the Cu_2O@N-CNT Micromotors exhibit a highly controllable negative phototaxis behavior (moving away from light sources). Such motors with outstanding propulsion in biological environments and wireless, repeatable, and light-modulated three-dimensional motion control are extremely attractive for future practical applications.

  • Glucose-Fueled Micromotors with Highly Efficient Visible-Light Photocatalytic Propulsion
    2019
    Co-Authors: Qinglong Wang, Renfeng Dong, Chun Wang, Wei Gao, Biye Ren, Decheng Chen, Yuying Liang, Yue-peng Cai
    Abstract:

    Synthetic micro/nanomotors fueled by glucose are highly desired for numerous practical applications because of the biocompatibility of their required fuel. However, currently all of the glucose-fueled micro/nanomotors are based on enzyme-catalytic-driven mechanisms, which usually suffer from strict operation conditions and weak propulsion characteristics that greatly limit their applications. Here, we report a highly efficient glucose-fueled cuprous oxide@N-doped carbon nanotube (Cu2O@N-CNT) micromotor, which can be activated by environment-friendly visible-light photocatalysis. The speeds of such Cu2O@N-CNT Micromotors can reach up to 18.71 μm/s, which is comparable to conventional Pt-based catalytic Janus Micromotors usually fueled by toxic H2O2 fuel. In addition, the velocities of such motors can be efficiently regulated by multiple approaches, such as adjusting the N-CNT content within the Micromotors, glucose concentrations, or light intensities. Furthermore, the Cu2O@N-CNT Micromotors exhibit a highly controllable negative phototaxis behavior (moving away from light sources). Such motors with outstanding propulsion in biological environments and wireless, repeatable, and light-modulated three-dimensional motion control are extremely attractive for future practical applications

  • highly efficient light driven tio2 au janus Micromotors
    ACS Nano, 2016
    Co-Authors: Renfeng Dong, Wei Gao, Qilu Zhang, Allen Pei, Biye Ren
    Abstract:

    A highly efficient light-driven photocatalytic TiO2–Au Janus micromotor with wireless steering and velocity control is described. Unlike chemically propelled Micromotors which commonly require the addition of surfactants or toxic chemical fuels, the fuel-free Janus micromotor (diameter ∼1.0 μm) can be powered in pure water under an extremely low ultraviolet light intensity (2.5 × 10–3 W/cm2), and with 40 × 10–3 W/cm2, they can reach a high speed of 25 body length/s, which is comparable to common Pt-based chemically induced self-electrophoretic Janus Micromotors. The photocatalytic propulsion can be switched on and off by incident light modulation. In addition, the speed of the photocatalytic TiO2–Au Janus micromotor can be accelerated by increasing the light intensity or by adding low concentrations of chemical fuel H2O2 (i.e., 0.1%). The attractive fuel-free propulsion performance, fast movement triggering response, low light energy requirement, and precise motion control of the TiO2–Au Janus photocataly...

  • Water-driven Micromotors for rapid photocatalytic degradation of biological and chemical warfare agents
    ACS Nano, 2014
    Co-Authors: Jinxing Li, Yuri Fedorak, Kevin Kaufmann, Renfeng Dong, Sirilak Sattayasamitsathit, Virendra V. Singh, Jahir Orozco, Beatriz Jurado-sánchez, Wei Gao, Joseph Wang
    Abstract:

    Threats of chemical and biological warfare agents (CBWA) represent a serious global concern and require rapid and efficient neutralization methods. We present a highly effective micromotor strategy for photocatalytic degradation of CBWA based on light-activated TiO2/Au/Mg microspheres that propel autonomously in natural water and obviate the need for external fuel, decontaminating reagent, or mechanical agitation. The activated TiO2/Au/Mg Micromotors generate highly reactive oxygen species responsible for the efficient destruction of the cell membranes of the anthrax simulant Bacillus globigii spore, as well as rapid and complete in situ mineralization of the highly persistent organophosphate nerve agents into nonharmful products. The water-driven propulsion of the TiO2/Au/Mg Micromotors facilitates efficient fluid transport and dispersion of the photogenerated reactive oxidative species and their interaction with the CBWA. Coupling of the photocatalytic surface of the Micromotors and their autonomous wat...

Yue-peng Cai - One of the best experts on this subject based on the ideXlab platform.

  • One body, two hands: photocatalytic function- and Fenton effect-integrated light-driven Micromotors for pollutant degradation
    Nanoscale, 2019
    Co-Authors: Jiajia Wang, Qianxian Yang, Zijun Bi, Qiying Liang, Renfeng Dong, Qinglong Wang, Huiying Wu, Chun Wang, Yongfeng Mei, Yue-peng Cai
    Abstract:

    The threat of water pollution represents a serious global concern and requires rapid and efficient neutralization methods. Herein, we report novel two-in-one light-driven Micromotors, i.e., light-driven TiO2-Fe Janus Micromotors with both photocatalysis and photo-Fenton processes, for efficiently degrading organic pollutants in contaminated water. The TiO2-Fe Micromotors moved rapidly by utilizing the photocatalytic H2O2 decomposition over TiO2 under UV irradiation, as well as generating highly reactive oxygen species responsible for the in situ degradation of the organic pollutants into non-harmful products. Notably, such coupling of photocatalysis generated on the TiO2 sides and the photo-Fenton process generated on the Fe sides, along with the rapid movement of these catalytic Janus Micromotors, results in a synergetic effect that can greatly enhance the degradation of organic pollutants. The degradation efficiency of the TiO2-Fe Micromotors is 52-fold that of only Fenton effects, and it is further improved by 40% compared to photocatalytic degradation alone. Considering the excellent advantages of the high efficiency, simple structure, reusability and the bubble-driven property, the new “on-the-fly” TiO2-Fe micromotor-based method has a promising potential for future water cleaning and waste-water treatments.

  • glucose fueled Micromotors with highly efficient visible light photocatalytic propulsion
    ACS Applied Materials & Interfaces, 2019
    Co-Authors: Qinglong Wang, Renfeng Dong, Chun Wang, Wei Gao, Biye Ren, Decheng Chen, Yuying Liang, Yue-peng Cai
    Abstract:

    Synthetic micro/nanomotors fueled by glucose are highly desired for numerous practical applications because of the biocompatibility of their required fuel. However, currently all of the glucose-fueled micro/nanomotors are based on enzyme-catalytic-driven mechanisms, which usually suffer from strict operation conditions and weak propulsion characteristics that greatly limit their applications. Here, we report a highly efficient glucose-fueled cuprous oxide@N-doped carbon nanotube (Cu_2O@N-CNT) micromotor, which can be activated by environment-friendly visible-light photocatalysis. The speeds of such Cu_2O@N-CNT Micromotors can reach up to 18.71 μm/s, which is comparable to conventional Pt-based catalytic Janus Micromotors usually fueled by toxic H_2O_2 fuel. In addition, the velocities of such motors can be efficiently regulated by multiple approaches, such as adjusting the N-CNT content within the Micromotors, glucose concentrations, or light intensities. Furthermore, the Cu_2O@N-CNT Micromotors exhibit a highly controllable negative phototaxis behavior (moving away from light sources). Such motors with outstanding propulsion in biological environments and wireless, repeatable, and light-modulated three-dimensional motion control are extremely attractive for future practical applications.

  • Glucose-Fueled Micromotors with Highly Efficient Visible-Light Photocatalytic Propulsion
    2019
    Co-Authors: Qinglong Wang, Renfeng Dong, Chun Wang, Wei Gao, Biye Ren, Decheng Chen, Yuying Liang, Yue-peng Cai
    Abstract:

    Synthetic micro/nanomotors fueled by glucose are highly desired for numerous practical applications because of the biocompatibility of their required fuel. However, currently all of the glucose-fueled micro/nanomotors are based on enzyme-catalytic-driven mechanisms, which usually suffer from strict operation conditions and weak propulsion characteristics that greatly limit their applications. Here, we report a highly efficient glucose-fueled cuprous oxide@N-doped carbon nanotube (Cu2O@N-CNT) micromotor, which can be activated by environment-friendly visible-light photocatalysis. The speeds of such Cu2O@N-CNT Micromotors can reach up to 18.71 μm/s, which is comparable to conventional Pt-based catalytic Janus Micromotors usually fueled by toxic H2O2 fuel. In addition, the velocities of such motors can be efficiently regulated by multiple approaches, such as adjusting the N-CNT content within the Micromotors, glucose concentrations, or light intensities. Furthermore, the Cu2O@N-CNT Micromotors exhibit a highly controllable negative phototaxis behavior (moving away from light sources). Such motors with outstanding propulsion in biological environments and wireless, repeatable, and light-modulated three-dimensional motion control are extremely attractive for future practical applications