Controlled synthesis of polyethylenimine coated gold nanoparticles: Application in glutathione sensing and nucleotide delivery

2016 ◽  
Vol 105 (5) ◽  
pp. 1191-1199 ◽  
Author(s):  
Prem C. Pandey ◽  
Govind Pandey ◽  
Roger J. Narayan
Keyword(s):  
Gold Nanoparticles ◽  
Controlled Synthesis

scholarly journals Continuous Flow Controlled Synthesis of Gold Nanoparticles Using Pulsed Mixing Microfluidic System

2015 ◽  
Vol 2015 ◽  
pp. 1-11 ◽  
Author(s):  
Guojun Liu ◽  
Xuhao Yang ◽  
Yan Li ◽  
Zhigang Yang ◽  
Wen Hong ◽  
...  
Keyword(s):  
Gold Nanoparticles ◽  
Flow Rate ◽  
Research Work ◽  
Microfluidic System ◽  
Noble Metal Nanoparticles ◽  
Controlled Synthesis ◽  
Entrance Angle ◽  
Section Size ◽  
Pulsed Mixing ◽  
Entrance Flow

To prepare the gold nanoparticles (AuNPs) with uniform sizes, fine morphology, and good monodispersity, a pulsed mixing microfluidic system based on PZT actuation was presented. The system includes PZT micropump and Y type micromixer. By adjusting voltage (entrance flow rate), pulsed frequency, phase, and other parameters, a variety of mixing modes can be achieved, so as to realize the controllable synthesis of nanoparticles in a certain range. By numerical simulation and analysis, the channel section size, entrance angle, and pulse frequency were optimized. Based on the optimized structure and working parameters, the test prototype has been manufactured in lab, and the related synthesis tests of AuNPs were carried out. The test results indicate that AuNPs with uniform morphology and good monodispersity can be synthesized using the system with the section size (0.4 mm × 0.4 mm), the entrance channel angle (60°) under condition of the pulsed frequency (300 Hz), and the entrance flow rate (4 mL/min). The average diameter and its standard deviation of AuNPs synthesized were 21.6 nm, 4.83 nm, respectively. The research work above can be applied to the fields such as the controlled synthesis of noble metal nanoparticles, biomedicine, and microchemical system.

Flow-controlled synthesis of gold nanoparticles in a biphasic system with inline liquid–liquid separation

2020 ◽  
Vol 5 (2) ◽  
pp. 356-366 ◽  
Author(s):  
Edith Chow ◽  
Burkhard Raguse ◽  
Enrico Della Gaspera ◽  
Steven J. Barrow ◽  
Jungmi Hong ◽  
...  
Keyword(s):  
Gold Nanoparticles ◽  
Flow Reactor ◽  
Reactor System ◽  
Biphasic System ◽  
Controlled Synthesis ◽  
Liquid Separation

4-Dimethylaminopyridine-stabilised gold nanoparticles are synthesised in a biphasic flow reactor system using organic/aqueous membrane separators and gas-permeable tubing.

Size-Controlled Synthesis of Gold Nanoparticles via High-Temperature Reduction

Langmuir ◽  
2004 ◽  
Vol 20 (8) ◽  
pp. 3021-3023 ◽  
Author(s):  
David A. Fleming ◽  
Mary Elizabeth Williams
Keyword(s):  
Gold Nanoparticles ◽  
High Temperature ◽  
Controlled Synthesis ◽  
Temperature Reduction ◽  
Size Controlled

Water-Soluble N-Heterocyclic Carbene-Protected Gold Nanoparticles: Size-Controlled Synthesis, Stability, and Optical Properties

2017 ◽  
Vol 129 (22) ◽  
pp. 6294-6298 ◽  
Author(s):  
Kirsi Salorinne ◽  
Renee W. Y. Man ◽  
Chien-Hung Li ◽  
Masayasu Taki ◽  
Masakazu Nambo ◽  
...  
Keyword(s):  
Gold Nanoparticles ◽  
Optical Properties ◽  
Water Soluble ◽  
Controlled Synthesis ◽  
Size Controlled

scholarly journals Controlled Synthesis of Gold Nanoparticles UsingAspergillus terreusIF0 and Its Antibacterial Potential against Gram Negative Pathogenic Bacteria

2014 ◽  
Vol 2014 ◽  
pp. 1-9 ◽  
Author(s):  
Eepsita Priyadarshini ◽  
Nilotpala Pradhan ◽  
Lala B. Sukla ◽  
Prasanna K. Panda
Keyword(s):  
Gold Nanoparticles ◽  
Pathogenic Bacteria ◽  
Particle Diameter ◽  
Weight Fraction ◽  
Xrd Analysis ◽  
Controlled Synthesis ◽  
Chloroauric Acid ◽  
Gram Negative ◽  
Fungal Extract ◽  
Vis Spectroscopy

Biosynthesis of monodispersed nanoparticles, along with determination of potential responsible biomolecules, is the major bottleneck in the area of bionanotechnology research. The present study focuses on an ecofriendly, ambient temperature protocol for size controlled synthesis of gold nanoparticles, using the fungusAspergillus terreusIF0. Gold nanoparticles were formed immediately, with the addition of chloroauric acid to the aqueous fungal extract. Synthesized nanoparticles were characterized by UV-Vis spectroscopy, TEM-EDX, and XRD analysis. Particle diameter and dispersity of nanoparticles were controlled by varying the pH of the fungal extract. At pH 10, the average size of the synthesized particles was in the range of 10–19 nm. Dialysis to obtain high and low molecular weight fraction followed by FTIR analysis revealed that biomolecules larger than 12 kDa and having –CH, –NH, and –SH functional groups were responsible for bioreduction and stabilization. In addition, the synthesized gold nanoparticles were found to be selectively bactericidal against the pathogenic gram negative bacteria,Escherichia coli.

A simple shape-controlled synthesis of gold nanoparticles using nonionic surfactants

RSC Advances ◽  
2013 ◽  
Vol 3 (21) ◽  
pp. 7726 ◽  
Author(s):  
M. Reza Hormozi-Nezhad ◽  
Pari Karami ◽  
Hossein Robatjazi
Keyword(s):  
Gold Nanoparticles ◽  
Nonionic Surfactants ◽  
Controlled Synthesis ◽  
Simple Shape ◽  
Shape Controlled

scholarly journals Controlled synthesis of highly-branched plasmonic gold nanoparticles through peptoid engineering

2018 ◽  
Vol 9 (1) ◽  
Author(s):  
Feng Yan ◽  
Lili Liu ◽  
Tiffany R. Walsh ◽  
Yu Gong ◽  
Patrick Z. El-Khoury ◽  
...  
Keyword(s):  
Gold Nanoparticles ◽  
Controlled Synthesis
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