scholarly journals Photoelectrochemical Imaging Using Carbon Dots (CDs) Derived from Chitosan

Proceedings ◽  
2018 ◽  
Vol 2 (13) ◽  
pp. 778 ◽  
Author(s):  
Dewen Zhang ◽  
Nikolaos Papaioannou ◽  
Maria-Magdalena Titirici ◽  
Steffi Krause
Keyword(s):  
Tin Oxide ◽  
Indium Tin Oxide ◽  
Carbon Dots ◽  
Electrochemical Sensors ◽  
Solvothermal Method ◽  
Photogenerated Electron ◽  
Photocurrent Imaging ◽  
New Applications

Carbon dots (CDs) derived from chitosan via a solvothermal method were covalentlylinked to an indium tin oxide (ITO) surface and showed a direct photoelectrochemical response.We attribute the photocurrent of the ITO-silane-CD surface to a photogenerated electron-transferprocess by CDs under illumination. The ITO-silane-CD surface was successfully used forac-photocurrent imaging. This opens up new applications for CDs as biocompatible andlight-addressable electrochemical sensors in bioimaging applications.

Highly sensitive and stable sensor for the detection of capsaicin using electrocatalytic carbon dots grafted onto indium tin oxide

2020 ◽  
pp. 129160
Author(s):  
Preeyanuch Supchocksoonthorn ◽  
Nichaphat Thongsai ◽  
Wei Wei ◽  
Padma Gopalan ◽  
Peerasak Paoprasert
Keyword(s):  
Tin Oxide ◽  
Indium Tin Oxide ◽  
Carbon Dots ◽  
Highly Sensitive

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 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.

Synthesis and characterization of carbon nanotube\iron oxide hybrids

2012 ◽  
Vol 1387 ◽  
Author(s):  
Lígia P. Souza ◽  
Thais M. Ferreira ◽  
Juliana R. Franco ◽  
Sergio de Oliveira ◽  
Viviany Geraldo ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Tin Oxide ◽  
Indium Tin Oxide ◽  
Treatment Duration ◽  
Solvothermal Method ◽  
Synthesis And Characterization ◽  
Reaction Parameters ◽  
Oxide Substrates ◽  
Synthesis Of Carbon Nanotubes

ABSTRACTIn this work, the synthesis of carbon nanotubes/hematite hybrids was investigated. The hybrids were produced by solvothermal method and a systematic study exploring different reaction parameters such as treatment duration, temperature and solvent was performed. Results from different characterization techniques demonstrate that the CNTs were effectively decorated with hematite (α-Fe2O3). The size and concentration of the NPs varies with the reaction parameters and the smallest obtained NPs have ∼100 nm diameter. It was demonstrated that translucent and homogeneous thin films made of the resulting hybrid material can be deposited on indium-tin oxide substrates by electrophoretic deposition or by vaccum filtration.

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