超声控制与驱动微纳米马达
发布时间：2018-07-13 11:46
【摘要】：人工合成微纳米马达可以将能源转换成驱动力,帮助人类完成一些复杂的任务。超声控制和推进微纳米马达具有可控性高、使用寿命长和生物相容性好等优点,在富集检测和靶向治疗方面有巨大应用前景。在本文中,我们展示了使用超声来控制和推进微纳米马达,其中包括停止管状微马达,Au-Pt纳米线的聚集组装行为,轨道诱导的金属纳米线组装和磁-声双驱微纳米马达。主要内容如下:1.超声对管状微纳米马达速度的快速和精确控制。施加超声后,打断了PEDOT/Ni/Pt管状微纳米马达尾部气泡的正常产生,导致在0.2 s内马达停止,关闭超声后可以重新运动。并且调节超声电压大小可以对管状微马达的速度进行精确调控。相比于其它控制方法具有响应速度快的优点。2.超声下棒状微纳米马达可逆的聚集和分散。其中包括棒状微纳米马达的聚集和分散、控制纳米马达群的移动、以及分离棒状与Janus纳米马达。纳米马达在超声下的聚集效应依赖于声场和单个纳米马达之间的相互作用,超声触发诱导马达快速在最近的压力节点周围聚集。声场诱发纳米马达的仿'生聚集行为在富集检测和靶向药物递送中具有很大的应用前景。3.超声下Au纳米棒在微轨道上的组装和收集。微轨道的存在可以诱发周围的声场不均匀分布,导致纳米线组装到微轨道上。微轨道的宽度可以诱导纳米线平行或垂直于微轨道的方向组装,该结果也被数值模拟结果验证。微轨道辅助组装和运输纳米线的能力在光子晶体、细胞收集和纳米电子制造中有潜在应用价值。4.磁-超声双驱纳米马达。这种双驱纳米马达在声场或磁场的存在的情况下都可以实现高效驱动。该马达包括一个凹形纳米棒端(声驱)和一个螺旋端(磁驱),通过模板辅助的电化学沉积和选择性化学蚀刻合成。双驱纳米马达在超声和磁的共同作用下也表现出仿生的聚集行为。磁-超声马达的双驱操控和聚集的行为在设计制造智能纳米器件方面有巨大的应用前景。
[Abstract]:Synthetic micro-and-nano motors can convert energy into driving forces, helping humans accomplish complex tasks. Ultrasonic control and propulsion of micro-nano motors have many advantages, such as high controllability, long service life and good biocompatibility. It has great application prospect in enrichment detection and targeted therapy. In this paper, we demonstrate the use of ultrasound to control and propel micro and nano motors, including stopping the aggregation and assembly behavior of tubular micro motors Au-Pt nanowires, orbital induced metal nanowires assembly and magnetoacoustic dual drive micro and nano motors. The main content is as follows: 1. Fast and accurate control of the velocity of tubular micro-nano motor by ultrasonic. After ultrasonic application, the normal formation of air bubbles in the tail of PEDOT / Ni / Pt tubular micro / nano motor was interrupted, which caused the motor to stop within 0.2 seconds and then remove after turning off the ultrasound. The speed of the tubular micromotor can be accurately adjusted by adjusting the ultrasonic voltage. Compared with other control methods, it has the advantage of fast response speed. Ultrasonic rod-shaped micro-nano motor reversible aggregation and dispersion. These include the aggregation and dispersion of rod-shaped micromotors, the control of the movement of nanometers, and the separation of rod-like and Janus nanometers. The aggregation effect of nanometer-motor under ultrasound depends on the interaction between the sound field and the single nanometer-motor, and the ultrasonic trigger induces the motor to rapidly gather around the nearest pressure node. The acoustic field induced aggregation behavior of nanometers has great application prospect in enrichment detection and target drug delivery. Assembly and collection of au nanorods on microorbital under ultrasound. The existence of microorbital can induce the non-uniform distribution of sound field around it, leading to the assembly of nanowires onto the microorbital. The width of the microorbital can induce the nanowires to be assembled parallel or perpendicular to the microorbital, and the results are verified by the numerical simulation results. The ability of microorbital assisted assembly and transport of nanowires has potential applications in photonic crystals, cell collection and nanoelectronics fabrication. Magnetic-ultrasonic dual-drive nano motor. The dual-drive nano-motor can be driven efficiently in the presence of sound field or magnetic field. The motor consists of a concave nanorod end (acoustic drive) and a spiral end (magnetic drive), which are synthesized by template assisted electrochemical deposition and selective chemical etching. The dual-drive nano-motor also exhibits bionic aggregation behavior under the combined action of ultrasonic and magnetic. The dual-drive control and aggregation of magnetic-ultrasonic motors have great application prospects in the design and manufacture of smart nanodevices.
【学位授予单位】：北京科技大学
【学位级别】：博士
【学位授予年份】：2017
【分类号】：TB383.1
本文编号：2119265
[Abstract]:Synthetic micro-and-nano motors can convert energy into driving forces, helping humans accomplish complex tasks. Ultrasonic control and propulsion of micro-nano motors have many advantages, such as high controllability, long service life and good biocompatibility. It has great application prospect in enrichment detection and targeted therapy. In this paper, we demonstrate the use of ultrasound to control and propel micro and nano motors, including stopping the aggregation and assembly behavior of tubular micro motors Au-Pt nanowires, orbital induced metal nanowires assembly and magnetoacoustic dual drive micro and nano motors. The main content is as follows: 1. Fast and accurate control of the velocity of tubular micro-nano motor by ultrasonic. After ultrasonic application, the normal formation of air bubbles in the tail of PEDOT / Ni / Pt tubular micro / nano motor was interrupted, which caused the motor to stop within 0.2 seconds and then remove after turning off the ultrasound. The speed of the tubular micromotor can be accurately adjusted by adjusting the ultrasonic voltage. Compared with other control methods, it has the advantage of fast response speed. Ultrasonic rod-shaped micro-nano motor reversible aggregation and dispersion. These include the aggregation and dispersion of rod-shaped micromotors, the control of the movement of nanometers, and the separation of rod-like and Janus nanometers. The aggregation effect of nanometer-motor under ultrasound depends on the interaction between the sound field and the single nanometer-motor, and the ultrasonic trigger induces the motor to rapidly gather around the nearest pressure node. The acoustic field induced aggregation behavior of nanometers has great application prospect in enrichment detection and target drug delivery. Assembly and collection of au nanorods on microorbital under ultrasound. The existence of microorbital can induce the non-uniform distribution of sound field around it, leading to the assembly of nanowires onto the microorbital. The width of the microorbital can induce the nanowires to be assembled parallel or perpendicular to the microorbital, and the results are verified by the numerical simulation results. The ability of microorbital assisted assembly and transport of nanowires has potential applications in photonic crystals, cell collection and nanoelectronics fabrication. Magnetic-ultrasonic dual-drive nano motor. The dual-drive nano-motor can be driven efficiently in the presence of sound field or magnetic field. The motor consists of a concave nanorod end (acoustic drive) and a spiral end (magnetic drive), which are synthesized by template assisted electrochemical deposition and selective chemical etching. The dual-drive nano-motor also exhibits bionic aggregation behavior under the combined action of ultrasonic and magnetic. The dual-drive control and aggregation of magnetic-ultrasonic motors have great application prospects in the design and manufacture of smart nanodevices.
【学位授予单位】：北京科技大学
【学位级别】：博士
【学位授予年份】：2017
【分类号】：TB383.1
【参考文献】
相关期刊论文 前1条
1 Famin Qiu;Bradley J.Nelson;;Magnetic Helical Micro-and Nanorobots:Toward Their Biomedical Applications[J];Engineering;2015年01期
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