scholarly journals Optimization and Analytical Behavior of Electrochemical Sensors Based on the Modification of Indium Tin Oxide (ITO) Using PANI/MWCNTs/AuNPs for Mercury Detection

Sensors ◽  
2020 ◽  
Vol 20 (22) ◽  
pp. 6502
Author(s):  
Noor Aini Bohari ◽  
Shafiquzzaman Siddiquee ◽  
Suryani Saallah ◽  
Mailin Misson ◽  
Sazmal Effendi Arshad
Keyword(s):  
Tin Oxide ◽  
Indium Tin Oxide ◽  
Electrochemical Sensors ◽  
High Sensitivity ◽  
Operating Conditions ◽  
Multiwalled Carbon ◽  
Mercury Detection ◽  
Security Controls ◽  
Ito Electrode ◽  
Analytical Behavior

In the present study, indium tin oxide (ITO) was used as a transparent working electrode for the development of an electrochemical sensor for the detection of mercury (II) ions (Hg2+). The electrode was modified by direct electrodeposition of polyaniline (PANI), multiwalled carbon nanotubes (MWCNTs) and gold nanoparticles (AuNPs) followed by optimization of the analyte and operating conditions, aiming to improve the selectivity, sensitivity and reliability of the electrode for mercury detection. Successful immobilization of the PANI and nanomaterials (MWCNTs and AuNPs) on the ITO electrode was confirmed by Scanning Electron Microscope (SEM), Energy Dispersive X-ray (EDX) and Fourier Transform Infrared Spectroscopy (FTIR) analyses. The optimum conditions for mercury detection using the modified ITO electrode were pH 7.0 of Tris-HCl buffer (50 mM) in the presence of 1 mM methylene blue (MB) as a redox indicator, a scan rate of 0.10 V·s−1 and a 70 s interaction time. The electrochemical behavior of the modified electrode under the optimized conditions indicated a high reproducibility and high sensitivity of mercury detection. It is therefore suggested that the PANI/MWCNT/AuNP-modified ITO electrode could be a promising material for the development of on-site mercury detection tools for applications in fields such as diagnostics, the environment, safety and security controls or other industries.

scholarly journals Performance of GaN-Based LEDs with Nanopatterned Indium Tin Oxide Electrode

2016 ◽  
Vol 2016 ◽  
pp. 1-7
Author(s):  
Zhanxu Chen ◽  
Wenjie Liu ◽  
Wei Wan ◽  
Gengyan Chen ◽  
Yongzhu Chen ◽  
...  
Keyword(s):  
Tin Oxide ◽  
Indium Tin Oxide ◽  
Ohmic Contacts ◽  
Three Dimensional ◽  
Light Output ◽  
Light Extraction Efficiency ◽  
Experimental Result ◽  
Indium Tin Oxide Electrode ◽  
Light Emitting ◽  
Ito Electrode

The indium tin oxide (ITO) has been widely applied in light emitting diodes (LEDs) as the transparent current spreading layer. In this work, the performance of GaN-based blue light LEDs with nanopatterned ITO electrode is investigated. Periodic nanopillar ITO arrays are fabricated by inductive coupled plasma etching with the mask of polystyrene nanosphere. The light extraction efficiency (LEE) of LEDs can be improved by nanopatterned ITO ohmic contacts. The light output intensity of the fabricated LEDs with nanopatterned ITO electrode is 17% higher than that of the conventional LEDs at an injection current of 100 mA. Three-dimensional finite difference time domain simulation matches well with the experimental result. This method may serve as a practical approach to improving the LEE of the LEDs.

Characterization of electrocatalytic proton reduction and surface adsorption of platinum nanoparticles supported by a polymeric stabilizer on an ITO electrode

2022 ◽  
Author(s):  
Yuta Tsubonouchi ◽  
Masashi Kajita ◽  
Taichi Hayasaka ◽  
Hamada S. A. Mandour ◽  
Mohamed R Berber ◽  
...  
Keyword(s):  
Tin Oxide ◽  
Indium Tin Oxide ◽  
Platinum Nanoparticles ◽  
Colloidal Solution ◽  
Surface Adsorption ◽  
Chemical Adsorption ◽  
Proton Reduction ◽  
Ito Electrode ◽  
Polymeric Stabilizer

Platinum nanoparticles (PAA-Pt) stabilized by polyacrylic acid (PAA) of a polymeric stabilizer were adsorbed on an indium tin oxide (ITO) surface from their colloidal solution due to the chemical adsorption...

scholarly journals Electrochemical Impedance Characterization of Cell Growth on Reduced Graphene Oxide–Gold Nanoparticles Electrodeposited on Indium Tin Oxide Electrodes

2019 ◽  
Vol 9 (2) ◽  
pp. 326 ◽  
Author(s):  
Somasekhar Chinnadayyala ◽  
Jinsoo Park ◽  
Yonghyun Choi ◽  
Jae-Hee Han ◽  
Ajay Yagati ◽  
...  
Keyword(s):  
Gold Nanoparticles ◽  
Graphene Oxide ◽  
Cell Growth ◽  
Reduced Graphene Oxide ◽  
Tin Oxide ◽  
Indium Tin Oxide ◽  
Electrochemical Impedance ◽  
Hek293 Cells ◽  
Ito Electrode ◽  
Reduced Graphene

The improved binding ability of graphene–nanoparticle composites to proteins or molecules can be utilized to develop new cell-based assays. In this study, we fabricated reduced graphene oxide–gold nanoparticles (rGO-AuNP) electrodeposited onto a transparent indium tin oxide (ITO) electrode and investigated the feasibility of the electrochemical impedance monitoring of cell growth. The electrodeposition of rGO–AuNP on the ITO was optically and electrochemically characterized in comparison to bare, rGO-, and AuNP-deposited electrodes. The cell growth on the rGO–AuNP/ITO electrode was analyzed via electrochemical impedance measurement together with the microscopic observation of HEK293 cells transfected with a green fluorescent protein expression vector. The results showed that rGO–AuNP was biocompatible and induced an increase in cell adherence to the electrode when compared to the bare, AuNP-, or rGO-deposited ITO electrode. At 54 h cultivation, the average and standard deviation of the saturated normalized impedance magnitude of the rGO–AuNP/ITO electrode was 3.44 ± 0.16, while the value of the bare, AuNP-, and rGO-deposited ITO electrode was 2.48 ± 0.15, 2.61 ± 0.18, and 3.01 ± 0.25, respectively. The higher saturated value of the cell impedance indicates that the impedimetric cell-based assay has a broader measurement range. Thus, the rGO–AuNP/ITO electrode can be utilized for label-free and real-time impedimetric cell-based assays with wider dynamic range.

Preparation of Electro-codeposited Film Consisting of Phthalocyanine and Perylene Derivatives

1999 ◽  
Vol 03 (04) ◽  
pp. 310-315 ◽  
Author(s):  
TERUHISA KUDO ◽  
MUTSUMI KIMURA ◽  
KENJI HANABUSA ◽  
HIROFUSA SHIRAI
Keyword(s):  
Tin Oxide ◽  
Indium Tin Oxide ◽  
Cathodic Polarization ◽  
Supporting Electrolyte ◽  
Glass Electrode ◽  
Aluminum Electrode ◽  
Cyclic Voltammogram ◽  
Coated Glass ◽  
Ito Electrode ◽  
Perylene Derivatives

A novel electro-codeposited film was homogeneously obtained on an indium tin oxide (ITO)-coated glass electrode by cathodic polarization of a solution of 2,9,16,23-tetracarboxyphthalocyaninatomagnesium(II) ( Mg II taPc ), N,N′-4-hydroxyphenyl-3,4,9,10-perylenetetra-carboxylic-diimide (4-hph-PTC) and ZnCl 2 as supporting electrolyte in N,N-dimethylformamide (DMF). The cyclic voltammogram for the codeposited film showed a reduction at −0.8 V vs SCE which was assigned to the reduction of Mg II taPc and one at −1.5 V vs SCE which was assigned to the reduction of 4-hph-PTC. A device based on the codeposited film was prepared by the formation of an aluminum electrode on the codeposited film. The device exhibited rectification and photoconduction. The results suggest that the codeposited film forms a number of p-n junction interfaces which are distributed on the ITO electrode.

High-sensitivity SPR sensor based on the eightfold eccentric core PQF with locally coated indium tin oxide

2020 ◽  
Vol 59 (22) ◽  
pp. 6484
Author(s):  
Qiang Liu ◽  
Jiudi Sun ◽  
Yudan Sun ◽  
Wei Liu ◽  
Jingwei Lv ◽  
...  
Keyword(s):  
Tin Oxide ◽  
Indium Tin Oxide ◽  
High Sensitivity ◽  
Spr Sensor

Three-dimensional hydrogel-modified indium tin oxide electrode with enhanced performance for in situ electrochemical detection of extracellular H2O2

The Analyst ◽  
2021 ◽  
Author(s):  
Shiying Zhou ◽  
Xianfeng Wang ◽  
Liuyi Jiang ◽  
Human Sun ◽  
Danqun Huo ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Electrochemical Detection ◽  
Tin Oxide ◽  
Indium Tin Oxide ◽  
Electrochemical Sensors ◽  
Three Dimensional ◽  
Oxide Electrode ◽  
Indium Tin Oxide Electrode ◽  
H2o2 Reduction

Two different electrochemical sensors (Hemin-G4/Au/GCE and Hemin-G4/Au/ITO) were developed and applied to explore the electrocatalytic capacity of H2O2 reduction. Due to the excellent catalytic activity of Hemin-G4 and the high...

scholarly journals A Novel Transparent pH Sensor Based on a Nanostructured ITO Electrode Coated with [3,3′-Co(1,2-C2B9H11)2]-Doped Poly(pyrrole)

Proceedings ◽  
2018 ◽  
Vol 2 (13) ◽  
pp. 869 ◽  
Author(s):  
Raquel Pruna ◽  
Francisco Palacio ◽  
Isabel Fuentes ◽  
Clara Viñas ◽  
Francesc Teixidor ◽  
...  
Keyword(s):  
Tin Oxide ◽  
Indium Tin Oxide ◽  
Biomedical Applications ◽  
Chemical Resistance ◽  
Point Of Care ◽  
Low Cost ◽  
Ph Sensor ◽  
Ito Electrode ◽  
Sensitive Electrode

A novel transparent and nanostructured ion-sensitive electrode based on indium tin oxide (ITO) coated with cobaltbis(dicarbollide)-doped poly(pyrrole) (PPy) is presented in this work. This metallacarborane-doped PPy was used as conducting polymer due to its high stability and chemical resistance. The ion-sensitive electrode was coupled to a miniaturized and low-cost potentiostat, in a final autonomous kit for potentiometric determination of pH. Qualitative calibration of the system revealed Nernstian behavior, resulting promising for novel point-of-care biomedical applications.

scholarly journals Boosting the performance of resistive switching memory with a transparent ITO electrode using supercritical fluid nitridation

RSC Advances ◽  
2017 ◽  
Vol 7 (19) ◽  
pp. 11585-11590 ◽  
Author(s):  
Cong Ye ◽  
Jia-Ji Wu ◽  
Chih-Hung Pan ◽  
Tsung-Ming Tsai ◽  
Kuan-Chang Chang ◽  
...  
Keyword(s):  
Supercritical Fluid ◽  
Tin Oxide ◽  
Indium Tin Oxide ◽  
Hafnium Oxide ◽  
Random Access ◽  
Random Access Memory ◽  
Resistive Random Access Memory ◽  
Access Memory ◽  
Resistive Switching Memory ◽  
Ito Electrode

A low temperature supercritical fluid nitridation (SCF-nitridation) technique was investigated to dope nitrogen into a indium-tin-oxide (ITO) electrode to boost the performance of hafnium oxide resistive random access memory (RRAM).

A cobalt nanoparticle ion-implantation-modified indium tin oxide electrode for direct electrocatalytic oxidation of methanol in alkaline media

RSC Advances ◽  
2015 ◽  
Vol 5 (96) ◽  
pp. 79178-79183 ◽  
Author(s):  
Wen Su ◽  
Yingyi Fu ◽  
Tong Wang ◽  
Yanan Yu ◽  
Jingbo Hu
Keyword(s):  
Tin Oxide ◽  
Indium Tin Oxide ◽  
Alkaline Media ◽  
Oxide Electrode ◽  
Sem Images ◽  
Indium Tin Oxide Electrode ◽  
Oxidation Of Methanol ◽  
Ito Electrode ◽  
Direct Methanol ◽  
Cobalt Nanoparticle

SEM images of the CoNPs/ITO electrode (A), and the CoNPs/ITO electrode exhibits a good electrocatalytic ability and stability towards direct methanol oxidation in alkaline medium (B, C and D).

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