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Wearable sensor for sweat detection and preparation method thereof

A sensor and sweat technology, applied in the field of wearable devices, can solve the problems of poor sensor stability and inconvenience to carry, and achieve the effects of high load capacity, improved sensitivity, and excellent electrocatalytic performance.

Active Publication Date: 2020-06-30
XIAMEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Currently widely used glucose sensors are based on enzyme-catalyzed sensors, but the enzyme-based sensors are less stable and inconvenient to carry.

Method used

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  • Wearable sensor for sweat detection and preparation method thereof
  • Wearable sensor for sweat detection and preparation method thereof
  • Wearable sensor for sweat detection and preparation method thereof

Examples

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preparation example Construction

[0042] An embodiment of the present invention proposes a method for preparing a wearable sensor for sweat detection as described above, including the following steps:

[0043] S1, forming at least two metal regions separated from each other on the flexible substrate by magnetron sputtering, serving as the metal layers of the working electrode and the reference electrode respectively.

[0044] Preferably, in this embodiment, three metal regions are formed on the flexible substrate, serving as the metal layers of the first electrode, the second electrode and the reference electrode respectively.

[0045] S2, the reduced graphene oxide / Pt NPs composite film is deposited on the metal layer of the working electrode in an alkaline environment by electrochemical deposition reduction method to form a transport layer; then an oxidase layer is formed on the transport layer.

[0046] Further, in a preferred embodiment, this step is specifically: placing the flexible substrate with the me...

Embodiment 1

[0055] A wearable sensor for sweat detection provided in this embodiment is prepared according to the following steps:

[0056] (1) Using the natural silk fibroin film as a flexible substrate, gold is sputtered on the flexible substrate to obtain three metal regions, which are respectively used as the metal layers of the three electrodes, and each metal layer includes an electrode region 1 and a wire 2, wherein the wire The line width is 1 mm, the line length is 20 mm, and the electrode area is a circle with a radius of about 3 mm. like figure 1 shown. Wherein, the metal layer in the middle is used as a reference electrode A, and the metal layers on both sides are respectively used as a working electrode B1 for glucose detection and a working electrode B2 for lactic acid detection.

[0057] (2) Add chloroplatinic acid to 0.2 mg / ml graphene oxide dispersion (pH=11, and contain 0.1 mmol / LPBS buffer) to form 0.2 mmol / L chloroplatinic acid graphene oxide dispersion. Sputter the...

Embodiment 2

[0062] This embodiment provides a wearable sensor for sweat detection, which differs from Embodiment 1 in that: in step (2), the concentration of graphene oxide is 0.4 mg / ml.

[0063] For the sensor obtained in this example, the loading of Pt NPs in the transport layer of the working electrode is 6.03%.

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Abstract

The invention provides a wearable sensor for sweat detection and a preparation method thereof, and relates to the field of wearable devices. The wearable sensor includes a flexible substrate, a working electrode and a reference electrode formed on the flexible substrate, the flexible substrate is a protein film, the working electrode includes a metal layer, a transmission layer and an oxidase layer sequentially arranged from bottom to top, and the reference electrode includes The metal layer and the Ag / AgCl layer are arranged sequentially from bottom to top; wherein, the transport layer of the working electrode is a graphene / PtNPs composite thin film, which is obtained by an electrochemical deposition reduction method. The wearable sensor has high sensitivity, wide measurement range and simple fabrication, and can be attached to the skin surface to quickly realize sweat detection in real time.

Description

technical field [0001] The invention relates to the field of wearable devices, and in particular to a wearable sensor for sweat detection and a preparation method thereof. Background technique [0002] With the improvement of people's living standards, the intake of high-calorie diets leads to an increasing incidence of diabetes. Long-term hyperglycemia causes patients to suffer from physical and psychological torture. Therefore, blood glucose monitoring plays an important role for people. If a fast, fast, and non-invasive sensor can monitor the content of glucose and lactic acid in the human body, it will be possible to realize the monitoring of human blood glucose. The dynamic and continuous monitoring of concentration has important application value for monitoring human health. [0003] Existing blood glucose monitoring usually adopts the method of rapid fingertip blood collection to detect blood glucose. This monitoring method requires repeated blood collection, and onl...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25D9/04C23C14/35C23C14/20B22F9/24B22F1/00C25C1/20G01N27/26G01N27/327
CPCC25D9/04C23C14/35C23C14/205B22F9/24C25C1/20G01N27/3271G01N27/26B22F1/054
Inventor 刘向阳刘笑天黄亚芬
Owner XIAMEN UNIV
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