The Experts below are selected from a list of 72561 Experts worldwide ranked by ideXlab platform

Jianguo Guan - One of the best experts on this subject based on the ideXlab platform.

  • single Component tio2 tubular microengines with motion controlled by light induced bubbles
    Small, 2015
    Co-Authors: Yan Li, Chuanrui Chen, Wei Li, Jianguo Guan
    Abstract:

    : In this work, light-controlled bubble-propelled single-Component Metal oxide tubular microengines have for the first time been demonstrated. For such a simple single-Component TiO2 tubular microengine in H2O2 aqueous solution under UV irradiation, when the inner diameter and length of the tube are regulated, the O2 molecules will nucleate and grow into bubbles preferentially on the inner concave surface rather than on the outer surface, resulting in a vital propulsion of the microengine. More importantly, the motion state and speed can be modulated reversibly, fast (the response time is less than 0.2 s) and wirelessly by adjusting UV irradiation. Consequently, the as-developed TiO2 tubular microengine promises potential challenged applications related to photocatalysis, such as "on-the-fly" photocatalytic degradation of organic pollutes and photocatalytic inactivation of bacteria due to the low cost, single Component, and simple structure, as well as the facile fabrication in a large-scale.

  • Single‐Component TiO2 Tubular Microengines with Motion Controlled by Light‐Induced Bubbles
    Small, 2015
    Co-Authors: Yan Li, Huiru Ma, Wei Li, Chuanrui Chen, Jianguo Guan
    Abstract:

    In this work, light-controlled bubble-propelled single-Component Metal oxide tubular microengines have for the first time been demonstrated. For such a simple single-Component TiO2 tubular microengine in H2O2 aqueous solution under UV irradiation, when the inner diameter and length of the tube are regulated, the O2 molecules will nucleate and grow into bubbles preferentially on the inner concave surface rather than on the outer surface, resulting in a vital propulsion of the microengine. More importantly, the motion state and speed can be modulated reversibly, fast (the response time is less than 0.2 s) and wirelessly by adjusting UV irradiation. Consequently, the as-developed TiO2 tubular microengine promises potential challenged applications related to photocatalysis, such as "on-the-fly" photocatalytic degradation of organic pollutes and photocatalytic inactivation of bacteria due to the low cost, single Component, and simple structure, as well as the facile fabrication in a large-scale.

Yan Li - One of the best experts on this subject based on the ideXlab platform.

  • single Component tio2 tubular microengines with motion controlled by light induced bubbles
    Small, 2015
    Co-Authors: Yan Li, Chuanrui Chen, Wei Li, Jianguo Guan
    Abstract:

    : In this work, light-controlled bubble-propelled single-Component Metal oxide tubular microengines have for the first time been demonstrated. For such a simple single-Component TiO2 tubular microengine in H2O2 aqueous solution under UV irradiation, when the inner diameter and length of the tube are regulated, the O2 molecules will nucleate and grow into bubbles preferentially on the inner concave surface rather than on the outer surface, resulting in a vital propulsion of the microengine. More importantly, the motion state and speed can be modulated reversibly, fast (the response time is less than 0.2 s) and wirelessly by adjusting UV irradiation. Consequently, the as-developed TiO2 tubular microengine promises potential challenged applications related to photocatalysis, such as "on-the-fly" photocatalytic degradation of organic pollutes and photocatalytic inactivation of bacteria due to the low cost, single Component, and simple structure, as well as the facile fabrication in a large-scale.

  • Single‐Component TiO2 Tubular Microengines with Motion Controlled by Light‐Induced Bubbles
    Small, 2015
    Co-Authors: Yan Li, Huiru Ma, Wei Li, Chuanrui Chen, Jianguo Guan
    Abstract:

    In this work, light-controlled bubble-propelled single-Component Metal oxide tubular microengines have for the first time been demonstrated. For such a simple single-Component TiO2 tubular microengine in H2O2 aqueous solution under UV irradiation, when the inner diameter and length of the tube are regulated, the O2 molecules will nucleate and grow into bubbles preferentially on the inner concave surface rather than on the outer surface, resulting in a vital propulsion of the microengine. More importantly, the motion state and speed can be modulated reversibly, fast (the response time is less than 0.2 s) and wirelessly by adjusting UV irradiation. Consequently, the as-developed TiO2 tubular microengine promises potential challenged applications related to photocatalysis, such as "on-the-fly" photocatalytic degradation of organic pollutes and photocatalytic inactivation of bacteria due to the low cost, single Component, and simple structure, as well as the facile fabrication in a large-scale.

Chuanrui Chen - One of the best experts on this subject based on the ideXlab platform.

  • single Component tio2 tubular microengines with motion controlled by light induced bubbles
    Small, 2015
    Co-Authors: Yan Li, Chuanrui Chen, Wei Li, Jianguo Guan
    Abstract:

    : In this work, light-controlled bubble-propelled single-Component Metal oxide tubular microengines have for the first time been demonstrated. For such a simple single-Component TiO2 tubular microengine in H2O2 aqueous solution under UV irradiation, when the inner diameter and length of the tube are regulated, the O2 molecules will nucleate and grow into bubbles preferentially on the inner concave surface rather than on the outer surface, resulting in a vital propulsion of the microengine. More importantly, the motion state and speed can be modulated reversibly, fast (the response time is less than 0.2 s) and wirelessly by adjusting UV irradiation. Consequently, the as-developed TiO2 tubular microengine promises potential challenged applications related to photocatalysis, such as "on-the-fly" photocatalytic degradation of organic pollutes and photocatalytic inactivation of bacteria due to the low cost, single Component, and simple structure, as well as the facile fabrication in a large-scale.

  • Single‐Component TiO2 Tubular Microengines with Motion Controlled by Light‐Induced Bubbles
    Small, 2015
    Co-Authors: Yan Li, Huiru Ma, Wei Li, Chuanrui Chen, Jianguo Guan
    Abstract:

    In this work, light-controlled bubble-propelled single-Component Metal oxide tubular microengines have for the first time been demonstrated. For such a simple single-Component TiO2 tubular microengine in H2O2 aqueous solution under UV irradiation, when the inner diameter and length of the tube are regulated, the O2 molecules will nucleate and grow into bubbles preferentially on the inner concave surface rather than on the outer surface, resulting in a vital propulsion of the microengine. More importantly, the motion state and speed can be modulated reversibly, fast (the response time is less than 0.2 s) and wirelessly by adjusting UV irradiation. Consequently, the as-developed TiO2 tubular microengine promises potential challenged applications related to photocatalysis, such as "on-the-fly" photocatalytic degradation of organic pollutes and photocatalytic inactivation of bacteria due to the low cost, single Component, and simple structure, as well as the facile fabrication in a large-scale.

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

  • single Component tio2 tubular microengines with motion controlled by light induced bubbles
    Small, 2015
    Co-Authors: Yan Li, Chuanrui Chen, Wei Li, Jianguo Guan
    Abstract:

    : In this work, light-controlled bubble-propelled single-Component Metal oxide tubular microengines have for the first time been demonstrated. For such a simple single-Component TiO2 tubular microengine in H2O2 aqueous solution under UV irradiation, when the inner diameter and length of the tube are regulated, the O2 molecules will nucleate and grow into bubbles preferentially on the inner concave surface rather than on the outer surface, resulting in a vital propulsion of the microengine. More importantly, the motion state and speed can be modulated reversibly, fast (the response time is less than 0.2 s) and wirelessly by adjusting UV irradiation. Consequently, the as-developed TiO2 tubular microengine promises potential challenged applications related to photocatalysis, such as "on-the-fly" photocatalytic degradation of organic pollutes and photocatalytic inactivation of bacteria due to the low cost, single Component, and simple structure, as well as the facile fabrication in a large-scale.

  • Single‐Component TiO2 Tubular Microengines with Motion Controlled by Light‐Induced Bubbles
    Small, 2015
    Co-Authors: Yan Li, Huiru Ma, Wei Li, Chuanrui Chen, Jianguo Guan
    Abstract:

    In this work, light-controlled bubble-propelled single-Component Metal oxide tubular microengines have for the first time been demonstrated. For such a simple single-Component TiO2 tubular microengine in H2O2 aqueous solution under UV irradiation, when the inner diameter and length of the tube are regulated, the O2 molecules will nucleate and grow into bubbles preferentially on the inner concave surface rather than on the outer surface, resulting in a vital propulsion of the microengine. More importantly, the motion state and speed can be modulated reversibly, fast (the response time is less than 0.2 s) and wirelessly by adjusting UV irradiation. Consequently, the as-developed TiO2 tubular microengine promises potential challenged applications related to photocatalysis, such as "on-the-fly" photocatalytic degradation of organic pollutes and photocatalytic inactivation of bacteria due to the low cost, single Component, and simple structure, as well as the facile fabrication in a large-scale.

Yuwen Zhang - One of the best experts on this subject based on the ideXlab platform.

  • Advances in Thermal Modeling of Selective Laser Sintering of Metal Powders
    arXiv: Computational Physics, 2016
    Co-Authors: Bin Xiao, Yuwen Zhang
    Abstract:

    Selective laser sintering (SLS) of single Component Metal powders is a rapid prototyping technology in which a high-energy laser beam scans, melts, shrinks and consolidates Metal powders with single Component. For better understanding physical mechanisms during laser sintering of single-Component Metal particles, a temperature transforming model with the consideration of shrinkage and convective flows is introduced to analyze the thermal/fluid behaviors in selective laser sintering of single powder layer. The model is also applied to investigate the sintering of powders on top of existing sintered layers under single- multiple-line scanning manners according to the practical manufacturing processes.

  • Two-dimensional modeling of sintering of a powder layer on top of nonporous substrate
    Frontiers of Mechanical Engineering in China, 2010
    Co-Authors: Tiebing Chen, Yuwen Zhang
    Abstract:

    Selective laser sintering (SLS) of a two-Component Metal powder layer on the top of multiple sintered layers by a moving Gaussian laser beam is modeled. The loose Metal powder layer is composed of a powder mixture with significantly different melting points. The physical model that accounts the shrinkage induced by melting is described by using a temperature-transforming model. The effects of the porosity and the thickness of the atop loose powder layer with different numbers of the existing sintered Metal powder layers below on the sintering process are numerically investigated. The present work will provide a better understanding to simulate much more complicated three-dimensional SLS process.

  • Analysis of partial melting in Metal powder bed with constant heat flux
    Heat Transfer Engineering, 2007
    Co-Authors: Bin Xiao, Yuwen Zhang
    Abstract:

    Rapid melting of a subcooled single-Component Metal powder bed in Selective Laser Sintering (SLS) is analyzed in this paper. Under irradiation of a pulse laser beam, the surface of the powder particle is molten first while the core of the particle remains solid. The temperature of the liquid layer is higher than the melting point, while the temperature of the solid core is below the melting point. Therefore, the mean temperature of the partially molten particle is within a range of temperature adjacent to the melting point. In addition, the powder bed experiences a significant density change during melting because the interstitial gas initially in the pore space is driven out as melting progresses. Melting in SLS of single-Component Metal powder can therefore be modeled as that occurring in a range of temperature with significant density change. The temperature distributions in the solid, liquid, and mushy zones and locations of the various interfaces are obtained by using an integral approximate method. The effects of initial porosity, dimensionless initial temperature, and dimensionless thermal conductivity of the interstitial gas on the surface temperature and locations of the interfaces are investigated.

  • Three-Dimensional Modeling of Laser Sintering of a Two-Component Metal Powder Layer on Top of Sintered Layers
    Journal of Manufacturing Science and Engineering, 2006
    Co-Authors: Tiebing Chen, Yuwen Zhang
    Abstract:

    A three-dimensional model of selective laser sintering of a two-Component loose Metal powder layer on top of previously sintered layers by a single-line laser scanning is presented. A temperature-transforming model is employed to model melting and resolidification accompanied by partial shrinkage during laser sintering. The heat losses at the top surface due to natural convection and radiation are taken into account. The liquid flow of the molten low-melting-point Metal powders, which is driven by capillary and gravity forces, is also considered and formulated by using Darcy’s law. The effects of the dominant processing parameters, such as laser-beam intensity, scanning velocity, and number of the existing sintered layers underneath, are investigated. DOI: 10.1115/1.2716714

  • Fundamental Models of Selective Laser Sintering of Metal Powders
    2006
    Co-Authors: Yuwen Zhang
    Abstract:

    Abstract : This project involves state-of-the-art, flindamental modeling of the laser beam-material interactions associated with Selective Laser Sintering (SLS) of single and multiple Components powders. The research tasks carried out in the project include modeling of (I) coupling of laser beam and Metal powders, (2) Liquid phase sintering of two-Component Metal powders, (3) Liquid phase sintering and Selective Laser Powder Remelting (SLPR) of single-Component Metal powders, and (4) the post-processing of the sintered parts with infiltration of liquid Metal. The developed models are capable to handle any material combination, and can handle selective placement of different materials prior to laser scanning.