趋磁细菌
微尺度化学
磁性纳米粒子
纳米机器人学
纳米技术
磁化
材料科学
纳米颗粒
磁矩
磁场
物理
磁铁矿
凝聚态物理
数学教育
冶金
量子力学
数学
作者
Qilong Li,Haitao Chen,Xi‐Qiao Feng,Chanchan Yu,Feng Feng,Yunfeng Chai,Lu Pan,Tao Song,Xiuyu Wang,Li Yao
出处
期刊:Small
[Wiley]
日期:2019-03-07
卷期号:15 (15)
被引量:18
标识
DOI:10.1002/smll.201900427
摘要
Abstract Micro‐/nanomotors are widely used in micro‐/nanoprocessing, cargo transportation, and other microscale tasks because of their ability to move independently. Many biological hybrid motors based on bacteria have been developed. Magnetotactic bacteria (MTB) have been employed as motors in biological systems because of their good biocompatibility and magnetotactic motion in magnetic fields. However, the magnetotaxis of MTB is difficult to control due to the lack of effective methods. Herein, a strategy that enables control over the motion of MTB is presented. By depositing synthetic Fe 3 O 4 magnetic nanoparticles on the surface of MTB, semiartificial magnetotactic bacteria (SAMTB) are produced. The overall magnetic properties of SAMTB, including saturation magnetization, residual magnetization, and blocking temperature, are regulated in a multivariate and multilevel fashion, thus regulating the magnetic sensitivity of SAMTB. This strategy provides a feasible method to manoeuvre MTB for applications in complex fluid environments, such as magnetic drug release systems and real‐time tracking systems. Furthermore, this concept and methodology provide a paradigm for controlling the mobility of micro‐/nanomotors based on natural small organisms.
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