Chemical corrosion resistance mechanism of fabric-like flexible plasma sensors

Impact Factor:6.3

DOI number:10.1016/j.apsusc.2024.161915

Affiliation of Author(s):西南交通大学

Teaching and Research Group:微纳制造及超精密传感技术

Journal:Applied Surface Science

Key Words:Flexible sensor；Plasmonic sensor；Nanostructures；Corrosion resistance；Oxygen plasma etching；Polydimethylsiloxane

Abstract:The flexible plasmonic sensor has triggered tremendous efforts for on-demand, on-site, in-situ, and real-time monitoring applications due to its ideal conformal contact, excellent optical tunability, high mechanical stability, and sensing repeatability. However, the corrosion resistance of flexible plasmonic sensors is often overlooked and remains an intractable obstruction. Herein, flexible fabric-like plasmonic nanostructures were developed and investigated in detail as a promising platform to resist chemical corrosion. The underlying mechanism for the chemical corrosion resistance of this fabric-like plasma nanostructure stems from two aspects: firstly, X-ray photoelectron spectroscopy (XPS) results demonstrate that oxygen plasma etching fractures the Si-O-Si and Si-C bonds, generating abundant Si–OH and C-OH bonds on the surface of the flexible substrate, thereby promoting condensation reactions between the flexible substrate material and Au, resulting in stable Si-O-Cr and C-O-Cr bonds; secondly, comparative experimental results indicate that the anchoring effect of the nanostructure with noble metals hinders the penetration and corrosion of liquid molecules at the interface. As a result, this plasmonic sensor with a fabric-like nanostructure can remain stable for more than 36 h in acidic, alkaline, and neutral solutions, and accurately identify target molecules at ultra-low concentrations. This work highlights the importance of surface nanostructures in enhancing acid and alkali resistance of flexible substrates, providing a reference strategy for the design and fabrication of other corrosion-resistant flexible sensors.

Co-author:Chunyang Wu,Yucong Mao,Zhi-jun Zhao,Bin Song,Bingjun Yu

First Author:Hongbo Wang

Indexed by:The basic research

Correspondence Author:Linmao Qian

Discipline:Engineering

Document Type:J

Volume:684

Page Number:161915

Translation or Not:no

Date of Publication:2024-11-29

Included Journals:SCI

Links to published journals:https://www.sciencedirect.com/science/article/pii/S016943322402631X