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Friction-nanogenerator-based molecular sensor

A technology of molecular sensors and nanogenerators, which is applied in the field of molecular sensors, can solve problems such as achievement reports, and achieve the effects of convenient production, convenient controllability, and small size

Active Publication Date: 2013-10-23
BEIJING INST OF NANOENERGY & NANOSYST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, no corresponding results have been reported in the field of molecular sensing

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0098] Embodiment 1 Mercury ion sensor

[0099] A metal gold film layer with a thickness of 50nm and a size of 1cm×1cm is used as the first conductive element, a polydimethylsiloxane (PDMS for short) film layer with a thickness of 10μm is used as the first friction layer, and a thickness of 50nm, A metal gold thin film layer with a size of 1cm×1cm is used as the second friction layer and the second conductive element, and then 1,3-dimercaptopropane (1,3-dimercaptopropane) is used to assemble gold nanoparticles with a size of 56nm, and then on the gold 3-Mercaptopropanoic acid (3-MPA) is modified on the nanoparticles to form a modified layer to achieve anti-mercury ion (Hg 2+ ) selectivity, which in turn becomes a mercury ion sensor, such as Figure 7 as shown in a.

[0100] Both the first insulating support layer and the second insulating support layer are plexiglass plates, and the two are connected by springs. For the connection method, see Figure 6 . When no external f...

Embodiment 2

[0103] Embodiment 2 lead ion sensor

[0104] A metal aluminum sheet with a thickness of 5mm and a size of 1cm×1cm is used as the first conductive element, and a polydimethylsiloxane (PDMS for short) film layer with a thickness of 40μm is used as the first friction layer. A metal copper thin plate of 1cm×1cm is used as the second conductive element, and a 100μm thick silicon wafer is used as the second friction layer, and a layer of photoresist is spin-coated, and a photoresist is formed on the photoresist by photolithography. Micron or sub-micron square window array; the second friction layer after photolithography is chemically etched with hot potassium hydroxide to form a pyramid-shaped concave structure array at the window. Then, polyacrylic acid molecules with specific adsorption to lead ions are supported on it to form a modification layer. Use elastic rubber as an insulating elastic connector to connect the metal copper sheet and the metal aluminum sheet, so that the PD...

Embodiment 3

[0105] Example 3 Escherichia coli sensor

[0106] The polyethylene sheet is used as two insulating supports, elastic glue is used as an insulating elastic connector, a thin layer of metallic silver with a thickness of 1 μm is used as the first conductive element, a polytetrafluoroethylene film with a thickness of 50 μm is used as the first friction layer, and a metal layer with a thickness of 1 μm is used as the first friction layer. Aluminum is used as the second friction layer and the second conductive layer, and nano-silver particles are loaded on its surface by vapor deposition, and thiolated mannose molecules are attached to form a modified layer to achieve highly selective adsorption of Escherichia coli. Among them, after depositing gold with a thickness of about 10 nanometers on the surface of the polytetrafluoroethylene film with a sputtering device, put it into an inductively coupled plasma etching machine, etch the side where the gold is deposited, and pass O 2 , Ar ...

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Abstract

The invention provides a friction-nanogenerator-based molecular sensor. The sensor comprises a first conducting element, a first friction layer, a second conducting element, a second friction layer, a modified layer and an elastic connecting component, wherein the first friction layer is placed on the lower surface of the first conducting element in a contact mode, the second friction layer is placed on the upper surface of the second conducting element in the contact mode, and the modified layer is combined with the upper surface of the second friction layer; by the elastic connecting component, the lower surface of the first friction layer is opposite to the upper surface of the second friction layer, and a certain distance is respectively kept between the lower surface of the first friction layer and the upper surface of the second friction layer; the lower surface of the first friction layer is at least partially in contact with the upper surfaces of the second friction layer under the action of external force, and the distance respectively between the lower surface of the first friction layer and the upper surfaces of the second friction layer can be restored under the action of the elastic connecting component when external force is removed, and simultaneously, electrical signals are outputted outwards through the first conducting element and the second conducting element; the electrical signals can be changed after the modified layer is combined with a target material to be detected.

Description

technical field [0001] The invention relates to a molecular sensor manufactured by using the principle of a frictional nanogenerator, which can sense microorganisms, molecules or ions adsorbed on the surface by converting mechanical energy generated by an applied external force into electrical energy. Background technique [0002] Today, with the rapid development of microelectronics and material technology, a large number of new microelectronic devices with multiple functions and high integration have been developed continuously, and have shown unprecedented application prospects in various fields of people's daily life. The sensor network will be the fundamental driving force for future economic development. Sensing includes mechanical sensing, chemical sensing, biological sensing and gas sensing. Molecular sensor refers to a device that uses sensor devices to convert noteworthy molecular information in the environment (such as heavy metal content or changes in specific b...

Claims

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Application Information

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IPC IPC(8): G01N27/26
Inventor 王中林林宗宏朱光
Owner BEIJING INST OF NANOENERGY & NANOSYST
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