一种外加电场增强甲醛探测灵敏度的系统及其使用方法
By introducing an external electric field and noble metal particles into a semiconductor formaldehyde detection device, the aggregation and reaction of formaldehyde molecules on the semiconductor surface are enhanced, solving the problem of insufficient detection sensitivity for low-concentration formaldehyde and achieving higher detection sensitivity.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- UNIV OF ELECTRONICS SCI & TECH OF CHINA ZHONGSHAN INST
- Filing Date
- 2024-01-26
- Publication Date
- 2026-07-17
AI Technical Summary
When the formaldehyde concentration is low, the sensitivity of semiconductor formaldehyde detection devices is low because fewer formaldehyde molecules react with the semiconductor, resulting in a small change in electron concentration and an insignificant change in resistance.
An external electric field is used to enhance the formaldehyde detection system. By setting a first electrode layer and a second electrode layer on both sides of the semiconductor layer, an electric field is formed, which causes formaldehyde molecules to gather on the semiconductor surface under the action of the electric field, increasing the reaction amount. Furthermore, the electron concentration change is enhanced by noble metal particles and protrusion structures.
The sensitivity of low-concentration formaldehyde detection was improved by enhancing the reaction strength between formaldehyde molecules and semiconductors and the change in electron concentration, thereby increasing the significance of the resistance change and improving the detection sensitivity.
Smart Images
Figure CN117929485B_ABST