Micro-acoustic flow driven rotary nano-motor and working method thereof

Abstract

The invention discloses a micro-acoustic flow driven rotary nano-motor and a working method thereof. The nano-motor comprises a guiding structure, a nano-rotor, a piezoelectric transducer, a driving substrate and a liquid medium, wherein the piezoelectric transducer excites the driving substrate to perform ultrasonic vibration, and in a certain vibration mode, the liquid medium is caused to generate local flow in the vicinity of the guiding structure, and the nano-rotor is attracted to the vicinity of the guiding structure under the action of local strong convection and rotates circumferentially. According to the scheme of the invention, the flow of liquid is caused by ultrasonic vibration, a local flow field is generated in the vicinity of a specific guiding structure, tiny rotors nearbycan be captured, and a rotational motion is generated under the action of the acoustic flow. The nano-motor with the actuation mode adopts acoustic vibration as a power source of the motor, does not require chemical fuels, and also has no special requirements for materials of the rotor, and thus the nano-motor has good biocompatibility.

Description

technical field [0001] The invention belongs to the technical field of micro-nano mechanical power devices, and particularly refers to a rotary nanomotor driven by micro-acoustic flow for the field of biomedicine and a working method thereof. Background technique [0002] A nanomotor is a micro power device that can convert other forms of energy (chemical energy, magnetic energy, static electricity, light energy, thermal energy, and sound energy, etc.) into mechanical energy at the nanoscale. By studying the biological motors contained in tiny living organisms in nature such as insects and Escherichia coli, scientists have developed several new types of artificial micro-scale motor devices. Preliminary application research shows that artificial nanomotor technology has great application prospects and markets in cancer treatment, cell surgery, nanoassembly and environmental governance. However, the current nanomotors are mainly driven by chemical energy, and the structure an...

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Problems solved by technology

[0004] Aiming at the deficiencies of the above-mentioned prior art, the purpose of the present invention is to provide a rotary nanomotor driven by a micro-acoustic flow and its working method, which solves the problem of the randomness of the movement mode of the nanomotor in the prior art and the difficulty in controlling the movement posture. etc., the present invention induces the flow of liquid through ultrasonic vibration, generates a local flow field near a specific guide structure, captures nearby tiny rotors, and generates rotational motion under the action of acoustic flow

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