微纳马达的制备及驱动控制方法研究

发布时间：2018-01-02 21:35

本文关键词：微纳马达的制备及驱动控制方法研究　出处：《哈尔滨工业大学》2016年博士论文　论文类型：学位论文

【摘要】：微纳马达是一种在微纳尺度上能够将化学能、光能、磁能以及电能等能量转化为动能推动自身运动的装置。作为探究微观世界的重要载体,微纳马达具有重量轻、体积小和输出推力大等优点,在生物传感检测、微纳器件制造和靶向药物释放等领域具有广阔的应用前景。目前,微纳马达的研究尚处在方兴未艾阶段,有别于传统的大型动力输出装置,微纳马达在驱动、控制和结构间具有耦合作用,因而存在制备方法复杂、驱动效率低以及控制精度差等诸多科学问题。针对微纳马达在生物检测传感领域应用存在的不足,本文以驱动方式为主线,结合控制方法和应用对微纳马达的运动行为及驱动控制机理进行研究。对于阴阳球微米马达,采用实验和分子动力学仿真相结合方法系统地研究了溶液浓度、催化材料和马达形状等因素对微米马达驱动性能的影响规律。研究表明在浓度为15%的过氧化氢水溶液中,阴阳球微米马达的运动速度最快可达36.8μm/s。应用金铂阴阳球微米马达对微缺陷进行修复,在浓度为15%的过氧化氢溶液中,阴阳球微米马达在32 min后可完成微缺陷的修复,修复后的电阻仅为76Ω。利用二氧化硅铂阴阳球微米马达实现超分辨显微成像检测分辨率高达20 nm,显著提高了光学显微成像的分辨率。对于管状微米马达,采用实验和理论分析相结合方法对微米马达的化学驱动性能影响因素进行系统地研究。研究表明在浓度为15%的过氧化氢水溶液中,直径5μm、长度20μm的复合多层膜微米马达的运动速度最快可达1550μm/s。并且,利用气泡驱动微米马达对神经毒素(甲基对氧磷)和有机染料(罗丹明6G)进行吸附,最高吸附效率可达95%。基于鱼类依靠躯体和尾鳍摆动的驱动机理,提出了一种柔性纳米马达的振荡磁场驱动方法,并通过实验和沉浸边界仿真相结合研究磁场频率、马达形状和溶液环境等因素对柔性纳米马达运动速度的影响规律。研究表明在频率为11 Hz的振荡磁场驱动下,身长5μm的柔性仿鱼型纳米马达运动速度最快可达30.9μm/s,此外,通过控制振荡磁场可实现对仿鱼型纳米马达运动速度和运动方向进行调控。通过对柔性微米马达的结构进行优化,本文提出了一种运动效率更高的柔性双臂型纳米马达。研究表明在频率为25 Hz的振荡磁场驱动下,双臂型柔性纳米马达的运动速度最快可达59.3μm/s。基于超声场驱动和磁场驱动提出一种微纳马达多物理场混合驱动新方法,并通过实验和仿真相结合的方法对多物理场混合驱动性能进行研究。研究表明,随着磁场驱动频率和超声场驱动电压的增加,多物理场混合驱动纳米马达运动速度呈增大的趋势。并且,通过控制物理场可以实现对多物理场混合驱动纳米马达的运动状态进行调控。此外,在超声场和磁场共同作用下,多物理场混合驱纳米马达出现了群集效应。基于图像识别技术与自动控制技术提出一种微纳马达自主导航控制方法。微纳马达自动控制系统主要由工业相机、自主导航控制系统、磁场控制系统和电磁铁组四部分构成,可用于对不同驱动方式微纳马达的运动状态进行控制。在自主导航系统控制下,微纳马达可对运动路径进行规划,在单一障碍、多路径障碍、多目的地障碍、简单迷宫和复杂迷宫中进行自主运动。综上所述,本文在微纳马达新驱动方式、新控制方法以及新功能应用等方面开展深入的研究。上述研究为微纳马达的研究提供理论和技术支持,可推动微纳马达在生物检测传感和药物靶向释放等领域的应用发展。
[Abstract]:Micro motor is a kind of micro nano scale can convert chemical energy, energy, energy and electricity energy conversion device of self motion. As an important carrier of kinetic energy to promote the micro world, micro motor has the advantages of small volume and light weight, large output thrust, in biological sensing, micro nano manufacturing and targeting drug delivery systems has a wide application prospect. At present, the research of micro motor is still in the stage of large power output is just unfolding, different from the traditional device, micro motor drive, with coupling between control and structure, so there is a complicated preparation method, low driving efficiency and control the accuracy of many scientific problems. Aiming at the deficiency in the application of micro Namada biological detection sensor field, based on the driving mode as the main line, combined with the control method and application of micro motor and drive the movement The control mechanism is studied. The Yin and Yang spheres motor, by experiments and molecular dynamics simulation method combining the systematic study of the influence of solution concentration, catalytic materials and motor driven shape properties of micron motor. The results indicate that the concentration of water in hydrogen peroxide solution 15%, velocity of the ball micro motor of Yin and Yang up to 36.8 mu m/s. application of gold and platinum spheres of micro defects of yin and Yang Motor repair, at the concentration of 15% hydrogen peroxide solution, micro motor can complete the repair ball and micro defects in 32 min after the resistance after repair is only 76 ohm. Realizing super-resolution imaging detection resolution up to 20 by nm platinum silica spheres of yin and Yang motor, significantly improve the optical microscopic imaging resolution. For tubular micro motor, using the method of combining experimental and theoretical analysis on the chemical micro motor The systematic research on driving performance influencing factors. The research showed that at the concentration of 15% aqueous solution of hydrogen peroxide, 5 m diameter, velocity of composite multilayer micro motor length of 20 m up to 1550 m/s. and the driving motor of the neurotoxin (micro bubble methyl paraoxon) and organic dyes (Luo Danming 6G) were investigated. The highest adsorption efficiency can reach 95%. driving mechanism of fish rely on body and caudal fin based on the proposed method of driving an oscillating magnetic field of flexible nano motor, and through experiment and simulation combined with the immersed boundary of magnetic field frequency, influence of motor shape and solution environment on flexible nano motor speed the research results show that the frequency of oscillation. The driving magnetic field is 11 Hz, the Flexible Biomimetic Fish type nano motor speed measuring 5 m up to 30.9 m/s, in addition, by controlling the oscillating magnetic field. The field can be realized to control fish like nano motor speed and direction of motion. By optimizing structure of flexible micro motor, the paper puts forward the flexible arms type nano motor a higher efficiency. The results show that in the frequency oscillation driving magnetic field is 25 Hz, speed of arms type flexible nano motor up to 59.3 m/s. presents a micro motor multiphysics hybrid drive new method based on magnetic field driving and driven by ultrasonic method, and through the combination of experiment and simulation study of multi physical field mixed driving performance. The results show that with the driving frequency of magnetic field and ultrasonic field driving voltage increases, the multi physical field hybrid nano motor speed increases. And, through the control of the physical field can be achieved to control the motion state of the multi physical field of hybrid driven nanomotor. In addition, In the ultrasonic field and electromagnetic field, multi field drive motor hybrid nano cluster effect. The image recognition technology and automatic control technology of a micro motor autonomous navigation control method based on micro motor automatic control system is mainly composed of industrial camera, autonomous navigation control system, magnetic field control system and an electromagnet group four part which can be used to control the motion state of different driving modes of micro nano motor. In the control of autonomous navigation system, motor micro nano planning of the motion path, in a single obstacle, multi path obstacle, multi destination obstacles, autonomous motion and simple maze maze. In summary, in this paper a new driving mode micro motor, study the new control method and new function application. These studies provide theoretical and technical support for research of micro motor, can drive the micro Namada's application in the fields of biosensing sensing and drug targeting release.

【学位授予单位】：哈尔滨工业大学
【学位级别】：博士
【学位授予年份】：2016
【分类号】：TH-39

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