Reversible Conversion between Schottky and Ohmic Contacts for Highly Sensitive, Multifunctional Biosensors. (28th November 2019)

• Record Type: Journal Article
• Authors: Zhao, Luming; Li, Hu; Meng, Jianping; Wang, Aurelia Chi; Tan, Puchuan; Zou, Yang; Yuan, Zuqing; Lu, Junfeng; Pan, Caofeng; Fan, Yubo; Zhang, Yaming; Zhang, Yan; Wang, Zhong Lin; Li, Zhou
• Is Part Of: Advanced functional materials. Volume 30:Number 5(2020)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2019-11-28
• Subjects: multifunctional biosensors -- reversible conversion -- Schottky/Ohmic contacts -- semiconductor nanowires -- triboelectric nanogenerators; Materials -- Periodicals; Chemical vapor deposition -- Periodicals; 620.11
• DOI: 10.1002/adfm.201907999
• Languages: English
• ISSNs: 1616-301X

Abstract

Abstract: Schottky and Ohmic contacts–based electronics play an important role in highly sensitive detection of biomolecules and neural electric impulses, respectively. The reversible conversion between these two contacts appears especially important for multifunctional sensing by just one biosensor. Here, Schottky barrier height (SBH) is successfully tuned by triboelectric nanogenerator (TENG) and the same device is made to achieve reversible conversion between Schottky contact and Ohmic contact. In the same Schottky to Ohmic reversible (SOR) biosensor, highly sensitive detections of biomolecule (i.e., neurotransmitter) and neural electric signal are achieved at different contact states. The SOR biosensor reveals the feasibility of using one device to realize multifunctional detection. This work proposes a simple and significant method to achieve reversible tuning between the Schottky contact and Ohmic contact on one device by TENG, which exhibits great potential in developing multifunctional and high‐sensitivity biosensors, rectifiers, and other functional electronic devices. Abstract : In this work, a novel Schottky barrier height tuning method is proposed, which realizes the reversible conversion between Schottky contact and Ohmic contact by the treatment of triboelectric nanogenerator. By this method, a Schottky to Ohmic reversible (SOR) biosensor is developed for achieving highly sensitive detection of a neurotransmitter and neural electric impulse in a physiological environment.