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Flexible biological pH sensor based on nano wire texture and preparation method thereof

A pH sensor and nanowire technology, applied in the field of nanowire textured flexible biological pH sensor and its preparation, can solve the problems of inability to use for a long time, allergies, surface friction, etc., to eliminate allergic and uncomfortable reactions, and avoid direct contact , the effect of avoiding interference

Active Publication Date: 2017-07-14
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there are surface friction problems in practical use, which will have great problems in actual product applications, and cannot be used for a long time, and there are allergies or other safety issues in direct contact between materials and human skin.

Method used

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  • Flexible biological pH sensor based on nano wire texture and preparation method thereof
  • Flexible biological pH sensor based on nano wire texture and preparation method thereof
  • Flexible biological pH sensor based on nano wire texture and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047](1) The flexible PI substrate with a thickness of 100 μm is subjected to oxygen plasma treatment, and the specific parameters are: vacuum degree 0.1Pa, working pressure 20Pa, working gas O 2 , flow rate 20sccm, radio frequency power 60w, room temperature treatment 5min. After plasma treatment, hydrophilic groups are introduced on the surface and the adhesion of the surface is increased, and then cut into 1×1cm 2 films.

[0048] (2) Design such as figure 2 Photolithography template, on the processed PI sheet, make an electrode template through ultraviolet exposure, and deposit Ti / Au electrodes with a thickness of 110nm at a distance of 3μm by electron beam evaporation. Post-bake at 120°C for 2 minutes, expose for 20 seconds, and develop for 1 minute. Electron beam evaporation parameters: vacuum degree 5×10 -6 mbar, Ti / Au thickness is 10 / 100nm respectively. The electrodes at both ends are led out by pressure welding. A microchannel electrode layer is prepared.

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Embodiment 2

[0053] (1) Treat the flexible PET substrate with a thickness of 100 μm in oxygen plasma, specific parameters: vacuum degree 0.1Pa, working pressure 20Pa, working gas O 2 , flow rate 20sccm, radio frequency power 60w, room temperature treatment 5min. After plasma treatment, hydrophilic groups are introduced on the surface and the adhesion of the surface is increased, and then cut into 1×1cm 2 sheet, making a flexible substrate.

[0054] (2) Treat the single-walled carbon nanotubes to introduce carboxyl functional groups. The parameters are: take 15 mg of single-walled carbon nanotubes and disperse them in 9 mL of concentrated nitric acid (65% by mass fraction) and 27 mL of concentrated sulfuric acid (98% by mass fraction). Stir in an oil bath for 45 min at ℃, wash the carbon nanotubes to neutrality, add 2 mg of dried carbon nanotubes into a prepared 10 ml solution of sodium dodecylbenzenesulfonate (SDBS) solution with a mass fraction of 1%, and Ultrasonic dispersion at 300W f...

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Abstract

The invention discloses a flexible biological pH sensor based on nano wire texture and a preparation method thereof. The pH sensor comprises a flexible substrate, a micro channel electrode structure, an electrode lead, a nano wire texture sensitive layer, and an ion selectively penetrating membrane. Two opposite channel structures composed of electrodes are prepared on the flexible substrate through a template method. The electrodes are connected to the exterior through leads. A textured nano wire material is prepared in the channel areas of electrodes and is taken as the pH sensitive layer. The ion selectively penetrating membrane is covered on the surface of electrodes. The nano wire sensitive material is arranged on the substrate, the channel is composed of two electrodes, the electrodes are completely covered by the ion selectively penetrating membrane, the problems that an inorganic nonmetal nano wire is easily worn in a flexible wearable sensor and can be disturbed are solved, and the in-situ real-time measurement and analysis of human fluid pH value is realized.

Description

technical field [0001] The invention belongs to the field of preparation of electrochemical sensors, and in particular relates to a nanowire texture-based flexible biological pH sensor and a preparation method thereof, which are used to realize in-situ real-time detection and analysis of human body fluids including sweat and blood, and to ensure The sensor is suitable for long-term wear and accurate work by the human body. Background technique [0002] The high-efficiency and rapid detection characteristics of the new biosensor will bring about a new technological revolution in the fields of biomedicine, environmental detection, food, and pharmaceutical industries. Among them, the detection of pH value is a very important technical means in the application of biotechnology. For example, the rapid and accurate detection of pH value in human blood and urine is of great significance to the treatment and prevention of human diseases. However, the current pH testing methods, inc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/12
CPCG01N27/125
Inventor 王如志沈震张曼晨严辉张铭王波汪浩宋雪梅
Owner BEIJING UNIV OF TECH
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