ZnO/ZnS Core/Shell Nanostructures on Biologically Inspired Gold Wires for Uric Acid Sensing

2020 ◽  
Vol 18 (6) ◽  
pp. 510-513
Author(s):  
Trishna Moni Das ◽  
Hoque Shehenaz Shamim ◽  
Dipjyoti Kalita ◽  
Sankar Moni Borah ◽  
Sunandan Baruah
Keyword(s):  
Gold Nanoparticles ◽  
Uric Acid ◽  
Aspergillus Niger ◽  
Monosodium Glutamate ◽  
Aqueous Media ◽  
Core Shell ◽  
Chloroauric Acid ◽  
Au Nps ◽  
Shell Nanostructures ◽  
Gold Wires

In this work, microwires of gold nanoparticles (Au NPs) were grown using the fungus Aspergillus niger as a biological template. Au NPs were synthesized through the reduction of chloroauric acid using monosodium glutamate (MSG) in an aqueous media. The MSG here, served as a nutritional trigger behind the self-organization of Au NPs on Aspergillus niger apart from being the reducing as well as stabilizing agent. The fungal hyphae coated with gold nanoparticles were spread over the glass slide. The ZnO/ZnS core/shell nanostructures were deposited in a 2 mm gap of gold microwires’ spread. Uric acid sensing behavior of these ZnO/ZnS core/shell nanostructures were studied using the gold microwires as electrode.

Novel Synthesis of Gold Nanoparticles in Aqueous Media

2005 ◽  
Vol 901 ◽  
Author(s):  
Abhilash Sugunan ◽  
Joydeep Dutta
Keyword(s):  
Gold Nanoparticles ◽  
Monosodium Glutamate ◽  
Aqueous Media ◽  
Trisodium Citrate ◽  
Chloroauric Acid ◽  
Size Distributions ◽  
Uniform Size ◽  
Aqueous Synthesis ◽  
Starting Solution ◽  
Highly Uniform

AbstractAqueous synthesis of glutamate functionalized single crystal gold nanoparticles was achieved by reducing a solution of chloroauric acid with monosodium glutamate. Highly uniform size distributions of the nanoparticles can be obtained by having an excess of monosodium glutamate in the starting solution. Similar to the conventional synthesis of gold nanoparticles by reduction of chloroauric acid with trisodium citrate, the obtained particle sizes were varied in the range of 14 – 25 nm without loosing the uniformity in its size distribution by varying the concentration of the reducing agent.

scholarly journals Design of gold nanoparticles-decorated SiO2@TiO2 core/shell nanostructures for visible light-activated photocatalysis

RSC Advances ◽  
2017 ◽  
Vol 7 (13) ◽  
pp. 7469-7475 ◽  
Author(s):  
Ryeri Lee ◽  
Yogeenth Kumaresan ◽  
Sei Young Yoon ◽  
Soong Ho Um ◽  
Il Keun Kwon ◽  
...  
Keyword(s):  
Gold Nanoparticles ◽  
Titanium Dioxide ◽  
Visible Light ◽  
Silicon Dioxide ◽  
Au Nanoparticles ◽  
Core Shell ◽  
Photocatalytic Reaction ◽  
Shell Nanostructures ◽  
Visible Light Driven

In this study, we designed core/shell nanostructures (CSNs) of silicon dioxide (SiO2)/titanium dioxide (TiO2), which were decorated with gold (Au) nanoparticles (NPs), to activate the visible light-driven photocatalytic reaction.

Water-Based Route to Synthesis of High-Quality UV-Blue Photoluminescing ZnSe/ZnS Core/Shell Quantum Dots and their Physicochemical Characterization

2016 ◽  
Vol 680 ◽  
pp. 553-557 ◽  
Author(s):  
Yong Ling Ding ◽  
Hua Dong Sun ◽  
Kang Ning Sun ◽  
Fu Tian Liu
Keyword(s):  
Ph Value ◽  
Aqueous Media ◽  
Physicochemical Characterization ◽  
Luminescent Properties ◽  
Core Shell ◽  
Reaction Flask ◽  
High Quality ◽  
Shell Nanostructures ◽  
Thiol Ligand ◽  
Znse Nanocrystals

Epitaxially overgrowing a semiconductor material with higher bandgap around the QDs has proven to be a crucial approach for improving the PL efficiency and stability of nanocrystals. In this paper, a ZnS shell was deposited around ZnSe nanocrystal cores via a noninjection approach in aqueous media. The deposition procedure conducted at 100°C in a reaction flask in the presence of the shell precursor compounds, together with the crude ZnSe nanocrystal cores and the thiol ligand glutathione. The influences of various experimental variables, including the reaction time, amount of thiourea, as well as pH value, on the growth rate and luminescent properties of the obtained core/shell nanocrystals have been systematically investigated. In comparison with the original ZnSe nanocrystals, the PL efficiency of the obtained ZnSe/ZnS core/shell nanostructures can be improved significantly with a QY up to 62.8%.

Gold coated iron oxide core shell nanostructures for oxidation of indoles and synthesis of uracil-derived spirooxindoles

2022 ◽  
Author(s):  
Shivanee Borpatra Gohain ◽  
Purna K Boruah ◽  
Manash Ranjan Das ◽  
Ashim Jyoti Thakur
Keyword(s):  
Iron Oxide ◽  
Core Shell ◽  
Hydrophilic Surface ◽  
Iron Species ◽  
Au Nps ◽  
Shell Nanostructures ◽  
Iron Oxide Core

Encapsulation of iron oxide (Fe3O4) based nanoparticles (NPs) with Au NPs hold promising scope for catalysis, which overcomes the hindrance of the inherent hydrophilic surface of iron species and facilitates...

Ag/Polypyrrole Core−Shell Nanostructures:  Interface Polymerization, Characterization, and Modification by Gold Nanoparticles

2007 ◽  
Vol 111 (24) ◽  
pp. 8463-8468 ◽  
Author(s):  
Xiaomiao Feng ◽  
Haiping Huang ◽  
Qingqing Ye ◽  
Jun-Jie Zhu ◽  
Wenhua Hou
Keyword(s):  
Gold Nanoparticles ◽  
Core Shell ◽  
Shell Nanostructures

New Insight into the Role of Gold Nanoparticles in Au@CdS Core-Shell Nanostructures for Hydrogen Evolution

Small ◽  
2014 ◽  
Vol 10 (22) ◽  
pp. 4664-4670 ◽  
Author(s):  
Xiang Ma ◽  
Kun Zhao ◽  
Hongjie Tang ◽  
Ying Chen ◽  
Chenguang Lu ◽  
...  
Keyword(s):  
Gold Nanoparticles ◽  
Hydrogen Evolution ◽  
Core Shell ◽  
Shell Nanostructures ◽  
Insight Into

scholarly journals X-ray powder diffraction to analyse bimetallic core–shell nanoparticles (gold and palladium; 7–8 nm)

RSC Advances ◽  
2019 ◽  
Vol 9 (46) ◽  
pp. 26628-26636 ◽  
Author(s):  
A. Rostek ◽  
K. Loza ◽  
M. Heggen ◽  
M. Epple
Keyword(s):  
Gold Nanoparticles ◽  
Diffraction Study ◽  
Powder Diffraction ◽  
Au Nanoparticles ◽  
Vinyl Pyrrolidone ◽  
Core Shell ◽  
Shell Nanoparticles ◽  
X Ray ◽  
Shell Nanostructures ◽  
Core Shell Nanoparticles

A comparative X-ray powder diffraction study on poly(N-vinyl pyrrolidone) (PVP)-stabilized palladium and gold nanoparticles and bimetallic Pd–Au nanoparticles (both types of core–shell nanostructures) was performed.

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