A Method for Guiding Micro-Nanomotors Using Magnetically Responsive Topological Orbitals

Abstract

The present invention discloses a method for guiding micro-nano motor by employing a mangnetic responsiveness topology orbit. The method comprises the following steps of: dispersing magnetic particlesinto solution, and assembling the magnetic particles in a magnetic field to form a one-dimensional chain as a topology orbit; dispersing the magnetic particles into the solution, applying an externalmagnetic field, allowing the magnetic particles to perform orientation in a direction of a magnetic induction line to form a one-dimensional chain as a topology orbit; and changing the direction of an external magnetic field to change the direction of the topology orbit, and changing the switching state of the external magnetic field to control appearance or disappearance of the topology orbit soas to dynamically control the movement direction of the micro-nano motor. The method overcomes the defect that a traditional magnetic field control method needs to perform complex and high-cost construction for the micro-nano motor, does not need to perform extra processing of the micro-nano motor itself, simplifies the preparation process of the micro-nano motor, has a certain biocompatibility and can achieve dynamic real-time regulation and control of the nonmagnetic micro-nano motor without special construction and microorganism movement directions and tracks.

Description

technical field [0001] The invention belongs to the technical field of micro-nano motors, and relates to a motion control method of a micro-nano motor. Background technique [0002] A micro-nano motor is a tiny device that can convert other forms of energy into kinetic energy, realize its own movement in a liquid medium, and perform complex tasks at the same time. It is expected that micro-nano motors can bring about radical changes in the fields of micro-nano engineering, biomedicine, and environmental science (Chem Rev, 2015, 115(16), 8704; Nanoscale, 2011, 3(2), 557; Angew Chem Int Ed Engl, 2015, 54(5), 1414-1444). Due to the unique motion properties of micro-nano motors, they have great potential in performing complex tasks such as cargo transportation, microsurgery, and micro-nano manufacturing (Nanoscale2013, 5(11), 4696; Chem.Rev.2014, 114, 6285; Nanoscale Letter 2007, 5). In order to realize the practical application of micro-nano motors, it is necessary to contro...

AI Technical Summary

Problems solved by technology

Although this method is effective, its large-scale production and practical application are hindered by the high cost and complicated and cumbersome steps of magnetic modification of micro-nano motors. At the same time, the ferromagnetic materials used in traditional methods are poor in biocompatibility and difficult to apply In the field of biomedicine, in addition, when controlling the movement of microorganisms, such an artificial modification process can easily lead to the death of microorganisms

On the other hand, when using methods such as local micro-patterns and micro-pipes to control the movement of micro-nano motors, since the patterns are pre-engraved on the substrate, the movement of the micro-nano motors can only be realized according to a predetermined route, and real-time regulation cannot be performed.

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