Etched and non-etched polystyrene nanoballs coated with AuNPs on Indium Tin Oxide (ITO) electrode as H2O2 sensor

3rd International Symposium on Green Technology for Value Chains 2018

生态环境科学;自然科学（总论）

Saputra, G.M.A.^1 ; Purwidyantri, A.^2 ; Yang, C.-M.^3^4^5 ; Prabowo, B.A.^3^6 ; Lai, C.-S.^3^7^8

Boyolangu 1 State High School, Tulungagung, Indonesia^1

Research Unit for Clean Technology, Indonesian Institute of Sciences, Bandung, Indonesia^2

Department of Electronic Engineering, Chang Gung University, Taoyuan, Taiwan^3

Institute of Electro-Optical Engineering, Chang Gung University, Taoyuan, Taiwan^4

Department of General Surgery, Chang Gung Memorial Hospital, Taoyuan, Taiwan^5

Research Center for Electronics and Telecommunications, Indonesian Institute of Sciences, Bandung, Indonesia^6

Department of Nephrology, Chang Gung Memorial Hospital, Taoyuan, Taiwan^7

Department of Materials Engineering, Ming-Chi University of Technology, New Taipei City, Taiwan^8

关键词: Analytical applications;    Electrochemical signals;    Energy dispersive X ray spectroscopy;    Field emission scanning electron microscopy;    Indium tin oxide electrodes;    Indium tin oxide substrates;    Lower limit of detections;    Thermal evaporation systems;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/277/1/012032/pdf
DOI  :  10.1088/1755-1315/277/1/012032

来源: IOP

【 摘 要 】

In electro-analytical applications, metallic nanoparticles (NPs) facilitate roughening of the conductive sensing interface and electrochemical signal amplification as a result of some metal NPs catalytic properties. In this study, natural lithography, termed as nanospheres lithography (NSL), was used to fabricate 5 nm thick AuNPs from thermal evaporation system on an Indium Tin Oxide (ITO) substrate patterned with polystyrene (PS) nanoballs (d=100 nm). The electrode substrate was characterized by field-emission scanning electron microscopy (FE-SEM), energy-dispersive X-ray spectroscopy (EDX), and cyclic voltammetry (CV) and utilized as a sensor to measure H2O2. More prominent features were shown by the etched PS on the fabricated electrode that left AuNPs honeycomb-like pattern than the non-etched one. Higher oxidation peak was demonstrated by the etched electrode than non-etched electrode as recorded with cyclic voltammogram, as well as in H2O2 measurement. CV outcomes denoted higher surface area at the substrate with etched PS and resulted in a lower limit of detection (LOD) of H2O2 than the non-etched substrates.