【摘要】：人工合成微納米馬達(dá)可以將能源轉(zhuǎn)換成驅(qū)動(dòng)力,幫助人類(lèi)完成一些復(fù)雜的任務(wù)。超聲控制和推進(jìn)微納米馬達(dá)具有可控性高、使用壽命長(zhǎng)和生物相容性好等優(yōu)點(diǎn),在富集檢測(cè)和靶向治療方面有巨大應(yīng)用前景。在本文中,我們展示了使用超聲來(lái)控制和推進(jìn)微納米馬達(dá),其中包括停止管狀微馬達(dá),Au-Pt納米線的聚集組裝行為,軌道誘導(dǎo)的金屬納米線組裝和磁-聲雙驅(qū)微納米馬達(dá)。主要內(nèi)容如下:1.超聲對(duì)管狀微納米馬達(dá)速度的快速和精確控制。施加超聲后,打斷了PEDOT/Ni/Pt管狀微納米馬達(dá)尾部氣泡的正常產(chǎn)生,導(dǎo)致在0.2 s內(nèi)馬達(dá)停止,關(guān)閉超聲后可以重新運(yùn)動(dòng)。并且調(diào)節(jié)超聲電壓大小可以對(duì)管狀微馬達(dá)的速度進(jìn)行精確調(diào)控。相比于其它控制方法具有響應(yīng)速度快的優(yōu)點(diǎn)。2.超聲下棒狀微納米馬達(dá)可逆的聚集和分散。其中包括棒狀微納米馬達(dá)的聚集和分散、控制納米馬達(dá)群的移動(dòng)、以及分離棒狀與Janus納米馬達(dá)。納米馬達(dá)在超聲下的聚集效應(yīng)依賴(lài)于聲場(chǎng)和單個(gè)納米馬達(dá)之間的相互作用,超聲觸發(fā)誘導(dǎo)馬達(dá)快速在最近的壓力節(jié)點(diǎn)周?chē)奂Ｂ晥?chǎng)誘發(fā)納米馬達(dá)的仿'生聚集行為在富集檢測(cè)和靶向藥物遞送中具有很大的應(yīng)用前景。3.超聲下Au納米棒在微軌道上的組裝和收集。微軌道的存在可以誘發(fā)周?chē)穆晥?chǎng)不均勻分布,導(dǎo)致納米線組裝到微軌道上。微軌道的寬度可以誘導(dǎo)納米線平行或垂直于微軌道的方向組裝,該結(jié)果也被數(shù)值模擬結(jié)果驗(yàn)證。微軌道輔助組裝和運(yùn)輸納米線的能力在光子晶體、細(xì)胞收集和納米電子制造中有潛在應(yīng)用價(jià)值。4.磁-超聲雙驅(qū)納米馬達(dá)。這種雙驅(qū)納米馬達(dá)在聲場(chǎng)或磁場(chǎng)的存在的情況下都可以實(shí)現(xiàn)高效驅(qū)動(dòng)。該馬達(dá)包括一個(gè)凹形納米棒端(聲驅(qū))和一個(gè)螺旋端(磁驅(qū)),通過(guò)模板輔助的電化學(xué)沉積和選擇性化學(xué)蝕刻合成。雙驅(qū)納米馬達(dá)在超聲和磁的共同作用下也表現(xiàn)出仿生的聚集行為。磁-超聲馬達(dá)的雙驅(qū)操控和聚集的行為在設(shè)計(jì)制造智能納米器件方面有巨大的應(yīng)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.
【學(xué)位授予單位】：北京科技大學(xué)
【學(xué)位級(jí)別】：博士
【學(xué)位授予年份】：2017
【分類(lèi)號(hào)】：TB383.1

【參考文獻(xiàn)】

相關(guān)期刊論文 前1條

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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本文編號(hào)：2119265