Polymer inclusion membranes as substrates for controlled in-situ gold nanoparticle synthesis

2018 ◽  
Vol 130 ◽  
pp. 81-89 ◽  
Author(s):  
Colin Specht ◽  
Robert W. Cattrall ◽  
Tony G. Spassov ◽  
Maya I. Spassova ◽  
Spas D. Kolev
Keyword(s):  
Gold Nanoparticle ◽  
Nanoparticle Synthesis ◽  
Gold Nanoparticle Synthesis

scholarly journals Rapid Nanoprobe Signal Enhancement by In Situ Gold Nanoparticle Synthesis

10.3791/57297 ◽  
2018 ◽  
Author(s):  
Jorge T. Dias ◽  
Gustav Svedberg ◽  
Mats Nystrand ◽  
Helene Andersson-Svahn ◽  
Jesper Gantelius
Keyword(s):  
Gold Nanoparticle ◽  
Nanoparticle Synthesis ◽  
Signal Enhancement ◽  
Gold Nanoparticle Synthesis

Novel Visual Detection of Mercury(II) Ion Based on In Situ Deposited Gold Nanoparticles

2017 ◽  
Vol 866 ◽  
pp. 398-401
Author(s):  
Woravith Chansuvarn ◽  
Apichat Imyim
Keyword(s):  
Gold Nanoparticle ◽  
Colorimetric Detection ◽  
Nanoparticle Synthesis ◽  
Observation Time ◽  
Red Color ◽  
One Step ◽  
Effective Stabilizer ◽  
Gold Nanoparticle Synthesis ◽  
Triton X

In this report, we present a new method for visual and colorimetric detection of Hg (II) ion by using in-situ composited gold nanoparticle (GNP). GNP was formed in one step at room temperature, using NaBH4 as reducing agent incorporated with 2-[5-(2-aminoethylsulfanyl)-pentylsulfanyl]-ethylamine (5-AEPE) as a stabilizer. A 5-AEPE ligand displayed an effective stabilizer for preventing the aggregation of gold nanoparticle in the absence of Hg (II) ion, showing a rose-red color. On the other hand, in the presence of Hg (II) ion, reduced Hg (0) can also deposit on the surface of gold nanoparticle, resulting solution turn to purple and blue immediately. Based on naked eye detection optimization, 125 μM Au (III), 0.6 mM 5-AEPE, 0.8 mM NaBH4 and 0.1%(v/v) Triton X-100 was achieved. By measuring at a wavelength of 680 nm, absorbance values increased linearly as two levels of concentration of Hg (II) ion range of 0.125-2.5 μM (low) and 2.5-15 μM (high). This method offer advantage of simplicity, rapidity, cost effectiveness and no requirement of any sophisticated instruments. Moreover, this method has several potential advantages as optical sensor, especially no as-prepared gold nanoparticle synthesis and shorter observation time.

A novel enzyme-mediated gold nanoparticle synthesis and its application for in situ detection of horseradish peroxidase inhibitor phenylhydrazine

2017 ◽  
Vol 41 (24) ◽  
pp. 15079-15086 ◽  
Author(s):  
Abhinav Parashar ◽  
Prachi Sachin Kedare ◽  
Sruthi Ann Alex ◽  
N. Chandrasekaran ◽  
Amitava Mukherjee
Keyword(s):  
Horseradish Peroxidase ◽  
Gold Nanoparticle ◽  
Nanoparticle Synthesis ◽  
Gold Nanoparticle Synthesis ◽  
In Situ Detection

Biocatalyzed gold nanoparticle synthesis for the in situ detection of horseradish peroxidase inhibitor (phenylhydrazine) has been demonstrated.

In-situ gold nanoparticle synthesis in polymer films

2020 ◽  
Author(s):  
Lidija Malic ◽  
Xuefeng Zhang ◽  
Keith Morton ◽  
Matthias Geissler ◽  
Jamal Daoud ◽  
...  
Keyword(s):  
Gold Nanoparticle ◽  
Polymer Films ◽  
Nanoparticle Synthesis ◽  
Gold Nanoparticle Synthesis

Effect of voltage polarity and supply frequency on properties of plasma contacting liquid electrode and gold nanoparticle synthesis

2021 ◽  
Author(s):  
Phuoc Van Thai ◽  
Nobuo Saito ◽  
Tsubasa Nakamura ◽  
Kazumasa Takahashi ◽  
Toru Sasaki ◽  
...  
Keyword(s):  
Gold Nanoparticle ◽  
Charged Particles ◽  
Nanoparticle Synthesis ◽  
Chemical Properties ◽  
Bulk Liquid ◽  
Solvated Electrons ◽  
Plasma Properties ◽  
Voltage Polarity ◽  
Specific Species ◽  
Gold Nanoparticle Synthesis

Abstract Plasma contacting with liquid provides many charged particles and reactive species into the liquid. The difficulty in controlling or selecting each specific species has significantly limited its applications in industry. Here, we present a study on using voltage polarity to regulate the type of charged particles absorbing from plasma into liquid. Detailed understanding of the processes at the plasma-liquid interface, electrolysis due to switching in voltage polarity was investigated via a visual pH observation, measuring the concentration of H2O2 and solvated electrons. The results indicated that changing in voltage polarity strongly affects the plasma properties, chemical properties, and electrolysis process in liquid, and further in the types of reducing species for gold nanoparticle synthesis. The results also showed using a suitable frequency could improve the efficiency of absorption of H2O2from plasma into the bulk liquid and the yield in the production of gold nanoparticles. The results provide a way to select desired species from plasma into the liquid for a distinct purpose and accompanying other properties in the system of plasma contacting with liquid.

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