阅读说明：本技术 一种基于分子器件的微弱磁场探测器 (Weak magnetic field detector based on molecular device ) 是由 不公告发明人 于 2020-05-20 设计创作，主要内容包括：本发明提供了一种基于分子器件的微弱磁场探测器,在源极和漏极间设置有机分子,在有机分子侧面设置四氧化三铁颗粒。在交变微弱磁场的作用下,四氧化三铁颗粒发生微振动,从而改变四氧化三铁颗粒与有机分子之间的距离,从而改变源极与漏极之间的势垒,改变源极与漏极之间的导电特性,根据导电特性的变化确定微弱磁场。因为,电极间有机分子的势垒对有机分子周围的环境非常敏感,而且四氧化三铁颗粒的微振动对交变磁场非常敏感,所以本发明能够实现高灵敏度的微弱磁场测量。另外,本发明中尺寸小；本发明基于电磁学原理实现磁场测量的,易于集成,在微弱磁场探测领域具有重要的应用前景。(The invention provides a weak magnetic field detector based on a molecular device, wherein organic molecules are arranged between a source electrode and a drain electrode, and ferroferric oxide particles are arranged on the side surface of the organic molecules. Under the action of an alternating weak magnetic field, the ferroferric oxide particles vibrate slightly, so that the distance between the ferroferric oxide particles and organic molecules is changed, the potential barrier between a source electrode and a drain electrode is changed, the conductive characteristic between the source electrode and the drain electrode is changed, and the weak magnetic field is determined according to the change of the conductive characteristic. Because the potential barrier of the organic molecules between the electrodes is very sensitive to the environment around the organic molecules and the micro-vibration of the ferroferric oxide particles is very sensitive to the alternating magnetic field, the method can realize high-sensitivity weak magnetic field measurement. In addition, the invention has small size; the invention realizes magnetic field measurement based on the electromagnetic principle, is easy to integrate, and has important application prospect in the field of weak magnetic field detection.)

1. A weak magnetic field detector based on a molecular device is characterized by comprising an electric insulating layer, a source electrode, a drain electrode, organic molecules and ferroferric oxide particles, wherein the source electrode, the drain electrode, the organic molecules and the ferroferric oxide particles are arranged on the electric insulating layer, the organic molecules extend between the source electrode and the drain electrode, and the ferroferric oxide particles are arranged on the side surface of the organic molecules; when the device is used, under the action of a weak magnetic field to be detected, the ferroferric oxide particles vibrate slightly, so that the distance between the ferroferric oxide particles and the organic molecules is changed, the potential barrier between the source electrode and the drain electrode is changed, the conductive characteristic between the source electrode and the drain electrode is changed, and the weak magnetic field is determined through the conductive characteristic.

2. The weak magnetic field detector based on molecular device as claimed in claim 1, wherein: the source electrode and the drain electrode are made of gold or graphene.

3. The weak magnetic field detector based on molecular device as claimed in claim 2, wherein: the organic molecules are dodecyl mercaptan, anthracene mercaptan and octanediol.

4. The weak magnetic field detector based on molecular device as claimed in claim 3, wherein: the size of the ferroferric oxide particles is 10-100 nanometers.

5. The weak magnetic field detector based on molecular device as claimed in claim 4, wherein: the distance between the ferroferric oxide particles and the organic molecules is 0-20 nanometers.

6. The weak magnetic field detector based on molecular device according to any one of claims 1 to 5, wherein: the number of the ferroferric oxide particles is multiple.

7. The weak magnetic field detector based on molecular device as claimed in claim 6, wherein: the ferroferric oxide particles are distributed on two sides of the organic molecules.

8. The weak magnetic field detector based on molecular device as claimed in claim 7, wherein: the sizes of the ferroferric oxide particles are different.

Technical Field

The invention relates to the field of weak magnetic field detection, in particular to a weak magnetic field detector based on a molecular device.

Background

The magnetic field strength is an important basic physical quantity. The measurement of magnetic field strength relates to various fields in life and production. The traditional magnetic field measurement is based on Hall effect and electromagnetic induction, the device size is large, the measurement sensitivity is low, and weak magnetic field measurement cannot be realized.

Disclosure of Invention

In order to solve the problems, the invention provides a weak magnetic field detector based on a molecular device, which comprises an electric insulating layer, a source electrode, a drain electrode, molecules and ferroferric oxide particles. The source electrode, the drain electrode, the molecules and the ferroferric oxide particles are arranged on the electric insulation layer, the molecules extend between the source electrode and the drain electrode, and the ferroferric oxide particles are arranged on the side surface of the molecules. When the device is used, under the action of a weak magnetic field to be detected, the ferroferric oxide particles vibrate slightly, so that the distance between the ferroferric oxide particles and molecules is changed, the potential barrier between the source electrode and the drain electrode is changed, the conductive characteristic between the source electrode and the drain electrode is changed, and the weak magnetic field is determined through the conductive characteristic.

Further, the material of the source electrode and the drain electrode is gold or graphene.

Further, the molecule is dodecyl mercaptan, anthracene mercaptan, octanediol.

Furthermore, the size of the ferroferric oxide particles is 10-100 nanometers.

Furthermore, the distance between the ferroferric oxide particles and the organic molecules is 0 to 20 nanometers.

Furthermore, the number of the ferroferric oxide particles is more than one.

Furthermore, the ferroferric oxide particles are distributed on two sides of the organic molecules.

Furthermore, the sizes of the ferroferric oxide particles are different.

The invention has the beneficial effects that: the invention provides a weak magnetic field detector based on a molecular device, wherein organic molecules are arranged between a source electrode and a drain electrode, and ferroferric oxide particles are arranged on the side surface of the organic molecules. Under the action of an alternating weak magnetic field, the ferroferric oxide particles vibrate slightly, so that the distance between the ferroferric oxide particles and organic molecules is changed, the potential barrier between a source electrode and a drain electrode is changed, the conductive characteristic between the source electrode and the drain electrode is changed, and the weak magnetic field is determined according to the change of the conductive characteristic. Because the potential barrier of the organic molecules between the electrodes is very sensitive to the environment around the organic molecules and the micro-vibration of the ferroferric oxide particles is very sensitive to the alternating magnetic field, the method can realize high-sensitivity weak magnetic field measurement. In addition, the invention has small size; the invention realizes magnetic field measurement based on the electromagnetic principle, is easy to integrate, and has important application prospect in the field of weak magnetic field detection.

The present invention will be described in further detail below with reference to the accompanying drawings.

Drawings

Fig. 1 is a schematic diagram of a weak magnetic field detector based on a molecular device.

Fig. 2 is a schematic diagram of another weak magnetic field detector based on a molecular device.

In the figure: 1. a source electrode; 2. a drain electrode; 3. an organic molecule; 4. ferroferric oxide particles.

Detailed Description

To further explain the technical means and effects of the present invention adopted to achieve the intended purpose, the following detailed description of the embodiments, structural features and effects of the present invention will be made with reference to the accompanying drawings and examples.