Fabrication of a new modified gold electrode based on gold nanoparticles and nanomagnetic Fe3O4/SiO2–(CH2)3–SH core shell for electrochemical evaluation and determination of dinitramine herbicide in water

RSC Advances ◽  
2016 ◽  
Vol 6 (55) ◽  
pp. 49798-49805 ◽  
Author(s):  
Mohsen Irandoust ◽  
Maryam Haghighi
Keyword(s):  
Gold Nanoparticles ◽  
Electrochemical Oxidation ◽  
Gold Electrode ◽  
Gold Electrodes ◽  
Core Shell ◽  
Au Nps ◽  
Voltammetric Method ◽  
Electrochemical Evaluation

A novel sensitive voltammetric method is described for the determination of dinitramine based on its electrochemical oxidation on gold electrodes modified with Fe3O4@SiO2–Si–(CH2)3–SH core shell (Au/Au–NPs–S–(CH2)3–Si–SiO2@Fe3O4).

scholarly journals The highly sensitive determination of serotonin by using gold nanoparticles (Au NPs) with a localized surface plasmon resonance (LSPR) absorption wavelength in the visible region

RSC Advances ◽  
2020 ◽  
Vol 10 (51) ◽  
pp. 30858-30869
Author(s):  
Phuong Que Tran Do ◽  
Vu Thi Huong ◽  
Nguyen Tran Truc Phuong ◽  
Thi-Hiep Nguyen ◽  
Hanh Kieu Thi Ta ◽  
...  
Keyword(s):  
Gold Nanoparticles ◽  
Visible Region ◽  
Localized Surface Plasmon ◽  
Au Nps ◽  
Highly Sensitive ◽  
Surface Enhanced ◽  
Surface Enhanced Raman ◽  
Enhanced Raman Scattering ◽  
Sensitive Determination

The development of improved methods for the synthesis of monodisperse gold nanoparticles (Au NPs) is of high priority because they can be used as substrates for surface-enhanced Raman scattering (SERS) applications relating to biological lipids.

Improved host–guest electrochemical sensing of dopamine in the presence of ascorbic and uric acids in a β-cyclodextrin/Nafion®/polymer nanocomposite

2014 ◽  
Vol 6 (15) ◽  
pp. 5962-5971 ◽  
Author(s):  
Nada F. Atta ◽  
Ahmed Galal ◽  
Shimaa M. Ali ◽  
Dalia M. El-Said
Keyword(s):  
Ascorbic Acid ◽  
Uric Acid ◽  
Gold Electrode ◽  
Polymer Nanocomposite ◽  
Electrochemical Sensing ◽  
Voltammetric Method

A voltammetric method based on a combination of β-cyclodextrin, Nafion® and a gold electrode modified with poly(3,4-ethylene-dioxythiophene) has been successfully developed for the determination of dopamine in the presence of ascorbic acid or uric acid.

Immobilization of Cellulase onto Core-Shell Magnetic Gold Nanoparticles Functionalized by Aspartic Acid and Determination of its Activity

2020 ◽  
Vol 39 (4) ◽  
pp. 328-336
Author(s):  
Elahe Poorakbar ◽  
Ali Akbar Saboury ◽  
Behzad Laame Rad ◽  
Kamyar Khoshnevisan
Keyword(s):  
Gold Nanoparticles ◽  
Aspartic Acid ◽  
Core Shell

scholarly journals Optical Heating and Temperature Determination of Core-Shell Gold Nanoparticles and Single-Walled Carbon Nanotube Microparticles

Small ◽  
2014 ◽  
Vol 11 (11) ◽  
pp. 1320-1327 ◽  
Author(s):  
Alexey Yashchenok ◽  
Admir Masic ◽  
Dmitry Gorin ◽  
Olga Inozemtseva ◽  
Bong Sup Shim ◽  
...  
Keyword(s):  
Gold Nanoparticles ◽  
Carbon Nanotube ◽  
Core Shell ◽  
Single Walled Carbon Nanotube ◽  
Single Walled Carbon ◽  
Temperature Determination ◽  
Optical Heating

scholarly journals Gold Electrodes Modified with Self-Assembled Layers Made of Sulphur Compounds and Gold Nanoparticles Used for Selective Electrocatalytic Oxidation of Catecholamine in the Presence of Interfering Ascorbic and Uric Acids

2011 ◽  
Vol 2011 ◽  
pp. 1-10 ◽  
Author(s):  
Teresa Łuczak
Keyword(s):  
Gold Nanoparticles ◽  
Detection Limit ◽  
Electrocatalytic Oxidation ◽  
Modified Electrodes ◽  
Gold Electrodes ◽  
Current Response ◽  
Good Sensitivity ◽  
Sulphur Compounds ◽  
Peak Separation

Gold electrodes modified with S-containing compounds and gold nanoparticles were used for determination of epinephrine (EP) in aqueous solution. The modified electrodes exhibited a good sensitivity, reproducibility, and stability. The results have shown that modified electrodes could clearly resolve the oxidation peaks of epinephrine, ascorbic acid (AA), and uric acid (UA) with peak-to-peak separation enabling determination of EP, AA, and UA in their simultaneous presence. A linear relationship between EP concentration and current response was obtained in the range of 0.1 μM to 700 μM with the detection limit ≥0.034 μM for the electrodes modified at 2D template and in the range of 0.1 μM to 800 μM with the detection limit ≥0.030 μM for the electrodes modified at 3D template.

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