A silicon nanowire-based gas sensor element and its preparation method and application in detecting acetone

Abstract

The invention discloses a silicon nanowire-based gas sensor element, its preparation method and its application in the detection of acetone. The nano-Ag and APTES double modification structure is introduced on the surface of the silicon nanowire, that is, the process of forming the silicon nanowire by chemical etching The metal Ag by-products generated in the reaction can realize the modification of silicon nanowires. APTES interacts with silicon nanowires in ethanol solution, and the effective attachment of the amino functional groups of APTES is formed on the surface of nanowires, thereby greatly enhancing the strength of silicon nanowires. The surface adsorption ability of organic acetone molecules significantly improves and improves the sensitivity response of silicon nanowire sensors to acetone. The element of the invention can accurately identify 1ppm and 2ppm acetone at room temperature and relative humidity of 80%, and is expected to be applied to the detection and diagnosis of early diabetes.

Description

technical field [0001] The invention belongs to the technical field of gas detection, and more specifically discloses an ordered porous silicon nanowire-based gas sensor element based on double modification of nano silver (Ag) and 3-aminopropyltriethoxysilane (APTES) , the sensor element has high sensitivity and ultrafast response characteristics to acetone gas at room temperature and high humidity. Background technique [0002] With the continuous development of the global economy, people's living standards continue to improve. However, an unexpected disease is sweeping the globe, especially in developed countries - diabetes. Diabetes is a chronic long-term disease that brings endless suffering to patients. Medical analysis points out that diabetes can be divided into three categories, 5-10% of patients suffer from type 1 diabetes, 90-95% of patients suffer from type 2 diabetes and gestational diabetes mellitus (GDM). In 2014, 442 million adults worldwide had diabetes. ...

AI Technical Summary

Problems solved by technology

The current clinical detection of diabetes mostly uses various invasive methods, but invasive methods are likely to cause discomfort to patients and the risk of infection of other diseases, and usually require specialized instruments and laboratory personnel, resulting in the detection of diabetes by invasive methods is not only expensive but also unfavorable Timely Diagnosis and Confirmation of Early Patients

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