CN103121212B - The microrobot driven based on antibacterial - Google Patents

Abstract

The present invention relates to a microrobot driven by bacteria. The microrobot is placed in a solution. The microrobot includes a body, an induction coil, a bacterial culture colloid and flagellate bacteria. The flagellate bacteria are fixed on the bacterial culture colloid. The bacterial culture colloid and the induction coil are fixed on the body, and the induction coil is in an alternating electric field; after the alternating electric field is applied, an electric current is generated in the induction coil, the solution is electrolyzed, and a pH gradient field is generated to push the flagellar bacteria to move directionally, and the flagellar bacteria Push the body to move. Compared with the prior art, the present invention has the advantages of simple structure, easy realization, sufficient and stable power and the like.

Description

Bacteria-powered microrobots

technical field

The invention relates to a robot, in particular to a micro-robot driven by bacteria.

Background technique

In recent years, a lot of research has been done on the driving methods of robots at home and abroad. New driving principles are very important for expanding the range of human activities. The exploration of using bio-energy, especially micro-bio-energy, has just begun. Using the energy of micro organisms to control the motion of micro organisms to drive the movement of robots is a new research field.

Energy supply is the key and main challenge in the miniaturization design of micro-robots. It is a very effective attempt to use the energy of bacteria and other organisms as the energy drive of micro-robots. Research on environmental simulation and experimental technology that bacteria attach to micro-robots in liquid and promote robot movement can promote the use of bacterial movement control and promote the development of robots in medical, environmental and chemical industries. Due to the development of nanotechnology, this A low-cost microrobot has very practical prospects. However, the current micro-robots driven by microorganisms generally have defects such as insufficient power and unstable state.

Contents of the invention

The object of the present invention is to provide a bacteria-driven micro-robot with simple structure, easy implementation, sufficient and stable power, in order to overcome the above-mentioned defects in the prior art.

The purpose of the present invention can be achieved through the following technical solutions:

A micro-robot driven by bacteria is characterized in that the micro-robot is placed in a solution, and the micro-robot includes a body, an induction coil, a bacterial culture colloid and flagellate bacteria, and the flagellate bacteria are fixed on the bacterial culture colloid, The bacterial culture colloid and the induction coil are fixed on the body, and the induction coil is in an alternating electric field;

After an alternating electric field is applied, a current is generated in the induction coil, the solution is electrolyzed, and a pH gradient field is generated to push the directional movement of the flagellar bacteria, and the flagellar bacteria push the body to move.

The diameter of the body is 200-800 μm.

Both the body and the bacteria culture colloid are processed from insulating materials, and the bacteria culture colloid is located at the rear of the body.

The induction coil is fixed above or below the main body and immersed in the solution.

The solution is an alkaline solution with hydroxide.

Described solution is sodium hydroxide solution.

The diameter of the induction coil is 20-50 μm, and the induction coil forms a closed loop.

The induction coil is made of inert metal material.

The flagellated bacteria are arranged in the same direction and orderly on the bacterial culture colloid, and the flagella of the flagellated bacteria are located at the end of the body.

Compared with the prior art, the present invention has the advantages of simple structure, matching with an external alternating electric field, movement in solution, convenient processing, easy realization, sufficient and stable power.

Description of drawings

Fig. 1 is the front view structure schematic diagram of the present invention;

Fig. 2 is a schematic diagram of the three-dimensional structure of the present invention.

detailed description

The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

Example

As shown in Figure 1 and Figure 2, a microrobot driven by bacteria is placed in a solution, and the microrobot includes a body 1, an induction coil 2, a bacterial culture colloid 3 and a flagellate bacterium 4, and the microrobot is placed in a solution. The flagellar bacteria 4 are fixed on the bacteria culture colloid 3, the bacteria culture colloid 3 and the induction coil 2 are fixed on the body 1, and the induction coil 2 is in the alternating electric field; the current in the induction coil 2 is applied after the alternating electric field The electrolytic solution generates a pH gradient field to push the directional movement of the flagellated bacteria 4, and the flagellated bacteria 4 pushes the body to move.

(1) The microrobot is placed in the solution

The solution must be able to generate hydrogen ions by electrolysis, and the induction coil is immersed in the solution. The solution can be an alkaline solution with hydroxide radicals such as sodium hydroxide and potassium hydroxide.

(2), the induction coil adopts platinum wire

It is required that the coil does not undergo physical and chemical changes, and has a little chemical stability, so an inert metal material is used.

(3) Apply an alternating electric field to cover the area where the solution is located

Based on the principle of electromagnetic induction, an alternating electric field is applied to generate an induced current in the induction coil, and a current loop is formed in the metal wire. Based on the electrochemical principle, the electrode process is started, and the solution around the coil is electrolyzed. During the process of electrolyzing the solution, hydrogen ions and oxygen are produced in the area where the oxidation reaction occurs, and hydroxide ions and hydrogen gas are produced in the area where the reduction reaction occurs. Therefore, when the concentration of hydrogen ions increases, the pH value decreases. Similarly, the concentration of hydrogen ions at the reduction reaction decreases and the pH value increases. Generates a pH gradient field.

(4), micro robot movement

Due to chemotaxis, flagellar bacteria spontaneously move towards the pH value region suitable for survival in the pH gradient field, and because they are fixed on the bacterial culture colloid of the micro-robot, they push the robot to move.

(5), micro robot control

By changing the frequency, amplitude and direction of the applied alternating electric field, the movement speed and direction of bacteria and micro-robots can be controlled.

Due to the microscopic size of bacteria, it is necessary to use lightweight insulating materials to make the micro-robot body and culture colloids; cultivating cells and bacteria on colloids is a mature technology in tissue engineering; due to the limited living conditions of bacteria, attention should be paid to temperature, The influence of pH value, etc.; the amplitude of the alternating voltage should not be too large. According to the experimental experience, the induced electromotive force should not exceed 3.0V, otherwise the bacteria will lose their activity; the characteristics of bacteria have a great impact on the robot, and the one with high activity and pH sensitivity should be selected. Bacteria are cultivated, such as E. coli; the density of bacteria should not be too large, otherwise the bacteria will entangle with each other and lose power.

Claims (4)

1. the microrobot driven based on antibacterial, it is characterized in that, this microrobot is placed in solution, described microrobot includes body, induction coil, antibacterial culturing colloid and flagellar bacterium, described flagellar bacterium is fixed on antibacterial culturing colloid, described antibacterial culturing colloid, induction coil are fixed on body, and described induction coil is in alternating electric field；

Producing electric current in induction coil after applying alternating electric field, solution is electrolysed, and produces pH gradient fields and promotes flagellar bacterium displacement, and flagellar bacterium promotes body to move；

Described flagellar bacterium is arranged on antibacterial culturing colloid in the same direction, in an orderly manner, and the flagellum of described flagellar bacterium is positioned at the end of body；

Described solution is sodium hydroxide solution；A diameter of 20～50 μm of described induction coil, described induction coil constitutes closed-loop path；Described induction coil uses inert metal material.

A kind of microrobot driven based on antibacterial the most according to claim 1, it is characterised in that a diameter of 200～800 μm of described body.

A kind of microrobot driven based on antibacterial the most according to claim 1, it is characterised in that described body and antibacterial culturing colloid are processed by insulant, and antibacterial culturing colloid is positioned at rear body.

A kind of microrobot driven based on antibacterial the most according to claim 1, it is characterised in that described induction coil is fixed on above or below body, and submergence is in the solution.