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One-Step Preparation of Fuel-Containing Anisotropic Nanocapsules with Stimuli-Regulated Propulsion.
ACS Nano ( IF 15.8 ) Pub Date : 2020-01-09 , DOI: 10.1021/acsnano.9b06408
Shuai Jiang 1, 2 , Anke Kaltbeitzel 1 , Minghan Hu 1 , Oksana Suraeva 1 , Daniel Crespy 2, 3 , Katharina Landfester 1
Affiliation  

One of the dreams of nanotechnology is to create tiny objects, nanobots, that are able to perform difficult tasks in dimensions and locations that are not directly accessible. One basic function of these nanobots is motility. Movements created by self-propelled micro- and nanovehicles are usually dependent on the production of propellants from catalytic reactions of fuels present in the environment. Developing self-powered nanovehicles with internally stored fuels that display motion regulated by external stimuli represents an intriguing and challenging alternative. Herein, a one-step preparation of fuel-containing nanovehicles that feature a motion that can be regulated by external stimuli is reported. Nanovehicles are prepared via a sol-gel process confined at the oil/water interface of miniemulsions. The nanovehicles display shapes ranging from mushroom-like to truncated cones and a core-shell structure so that the silica shell acts as a hull for the nanovehicles while the core is used to store the fuel. Azo-based initiators are loaded in the nanovehicles, which are activated to release nitrogen gas upon increase of temperature or exposure to UV light. Enhanced diffusion of nanovehicles is achieved upon decomposition of the fuel.

中文翻译:

一步一步制备含燃料的各向异性纳米胶囊,具有刺激调节的推进作用。

纳米技术的梦想之一是创建微小的物体,即纳米机器人,它们能够在无法直接访问的尺寸和位置执行艰巨的任务。这些纳米机器人的一项基本功能是运动性。由自行式微型和纳米车辆产生的运动通常取决于环境中存在的燃料的催化反应产生的推进剂。用内部存储的燃料开发能显示出受外部刺激调节的运动的自供电纳米汽车,是一种有趣且具有挑战性的选择。在本文中,报道了一种一步制备含燃料的纳米车辆,其特征在于可以通过外部刺激来调节运动。通过限制在细乳液的油/水界面处的溶胶-凝胶法制备纳米载体。纳米车辆显示出从蘑菇状到截头圆锥形的形状以及核-壳结构,使得二氧化硅壳充当纳米车辆的船体,而核用于存储燃料。基于偶氮的引发剂被装载在纳米载体中,当温度升高或暴露于紫外光时,其被活化以释放氮气。当燃料分解时,纳米车辆的扩散得以增强。
更新日期:2020-01-10
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