Anti-biofouling NH_(3) gas sensor based on reentrant thorny ZnO/graphene hybrid nanowalls  

作　　者：Tian Hang Jiangming Wu Shuai Xiao Baohong Li Hongbo Li Chengduan Yang Cheng Yang Ning Hu Yonghang Xu Yu Zhang Xi Xie 

机构地区：[1]State Key Laboratory of Optoelectronic Materials and Technologies,School of Electronics and Information Technology,Guangdong Province Key Laboratory of Display Material and Technology,Sun Yat-Sen University,Guangzhou 510006,China [2]School of Materials Science and Energy Engineering,Foshan University,Foshan 528000,China [3]The First Affiliated Hospital of Sun Yat-Sen University,Guangzhou 510080,China

出　　处：《Microsystems & Nanoengineering》2020年第1期706-716,共11页微系统与纳米工程（英文）

基　　金：The authors acknowledge the financial support from the National Natural Science Foundation of China(grant nos.61771498,61901535,51805556,51705543,and 31900954);the Youth Teachers’Development Program of Sun Yat-sen University(nos.18lgpy21 and 18lgpy18);the Science and Technology Planning Project of Guangdong Province for Industrial Applications(no.2017B090917001);the Guangdong Province Key Area R&D Program(grant no.2018B030332001);the Science and Technology Program of Guangzhou,China(grant no.201907010038);the Guangdong Basic and Applied Basic Research Foundation(grant no.2019A1515012087);the Open Research Fund of State Key Laboratory of Bioelectronics,Southeast University,for support.

摘　　要：Since toxic gas leakage may cause ecological environmental problems and even life-threatening damage,effective monitoring of toxic gas is of great importance and subject to increasing demand.However,complicated environmental factors,as well as various coexisting interferences can easily affect the sensitivity and selectivity of gas sensors,hindering their performance.Recent reports have successfully demonstrated the development of hierarchical nanostructures with desirable self-cleaning properties,yet gas sensors that can resist contamination have rarely been realized.Here,we developed a reentrant thorny ZnO/graphene hybrid nanowall structure that simultaneously repels liquid contamination and possesses NH_(3) gas sensing properties.The unique reentrant and hierarchical structure,featuring an interconnected vertical graphene nanowall framework with numerous ZnO nanospikes branched on the top nanowall,is highly repellent to liquids,even biofluids with low surface tension.The hierarchical structure consisting of gas sensing graphene and ZnO can be successfully applied as an NH_(3) gas sensor at room temperature,exhibiting not only excellent sensitivity,selectivity,and repeatability,but also outstanding stability even after bacterial contamination.This study provides a versatile method for fabricating reentrant and hierarchical structures with excellent liquid repellency,and offers a promising method for designing reliable gas sensors with anti-biofouling properties.

关 键 词：FOULING walls VERSATILE 

分 类 号：TP212[自动化与计算机技术—检测技术与自动化装置]