磁场驱动用螺旋碳纳米线截断筛选及磁性修饰  

Truncation, filtration and magnetic modification of helical carbon nanowires for magnetic-field driving motion

作　　者：白学元 叶子兴 佟浩[1] 王陈梓 李勇[1] 潘路军[3] BAI Xueyuan;YE Zixing;TONG Hao;WANG Chenzi;LI Yong;PAN Lujun(State Key Laboratory of Tribology in Advanced Equipment/Department of Mechanical Engineering,Tsinghua University,Beijing 100084,China;Department of Urology,Peking Union Medical College Hospital,Beijing 100730,China;School of Physics,Dalian University of Technology,Dalian 116024,China)

机构地区：[1]清华大学机械工程系/高端装备界面科学与技术全国重点实验室,北京100084 [2]中国医学科学院北京协和医院泌尿外科,北京100730 [3]大连理工大学物理学院,辽宁大连116024

出　　处：《功能材料》2023年第4期4020-4026,4064,共8页Journal of Functional Materials

基　　金：国家自然科学基金项目(51972039);清华大学机械系自由探索基金项目(2020JXA06)。

摘　　要：为实现螺旋碳纳米线新型微纳米机器人磁场驱动运动,开展了螺旋碳纳米线截断、磁性修饰及磁场驱动运动研究。提出硝酸氧化-超声振动-滤纸过滤的长度截断筛选方法,实现了螺旋碳纳米线分散且可控截取长度2~8μm。实验对比研究了磁控溅射镍、化学镀镍、水热法生长Fe_(3)O_(4)纳米颗粒的磁性修饰方法。通过扫描电子显微镜、能量色散X射线谱分析等方法对修饰效果进行了评价,获得了具有较强磁性的螺旋碳纳米线。微流道液体中磁场驱动特性实验表明:磁控溅射修饰的螺旋碳纳米线可实现较为快速(3.35μm/s)的微纳米机器人运动特性,轨迹运动精度可控小于5μm。To fabricate a new type of micro-nanorobot of helical carbon nanowires(HCNs),the truncation,filtration,and magnetic modification were studied for realizing the motion actuated by magnetic field.The treating method of nitric acid oxidation,ultrasonic vibration,and filter paper filtration was proposed to disperse and shorten into 2-8μm in length.Magnetic modification methods on the surface of HCNs including magnetron sputtering,electroless plating,and hydrothermal growth of Fe_(3)O_(4) nanoparticles were experimented and compared.The modification effect was evaluated by scanning electron microscopy and element analysis of energy dispersive X-ray spectroscopy.As a result,the HCNs with good magnetic characteristics were obtained.The magnetic-field driving experiments in a micro-channel showed that HCNs modified by magnetron sputtering realized the fast motion speed(3.35μm/s)and the controllable trajectory motion accuracy<5μm.

关 键 词：微纳米机器人 螺旋碳纳米线 截断筛选 磁性修饰 磁场驱动 

分 类 号：TB333[一般工业技术—材料科学与工程] TP242[自动化与计算机技术—检测技术与自动化装置]