Dopamine sensor by Gold Nanoparticles Absorbed Redox behaving metal Complex

Sivasankari, G.; Boobalan, Selvakumar; Deepa, D.

doi:10.5958/2231-5713.2018.00013.2

Cited by 8 publications

(1 citation statement)

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“…These NPs are in colloidal forms suitable for biological applications as they do not contain any harmful chemicals (4,5). On the other hand, suitable selection is appropriate in this case, to find out which parts of the plant have excellent reducing or stabilizing components (6,7). Biological methods are among the best, cheapest, safest and easiest methods of preparation (8)(9)(10).…”

Section: Introductionmentioning

confidence: 99%

Biosynthetic Gold Nanoparticles as Sensitive and Selective Colorimetric Method for Mercury Ions

ABDULGHAFOR AHMED,

AHMED FARHAN,

MONİEM DADOOSH

et al. 2023

Journal of the Turkish Chemical Society Section A: Chemistry

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Gold nanoparticles (AuNPs) are widely studied materials that have intense applications in various fields. Different methods use to synthesize the AuNPs, one of them is eco-friendly biological method, known as "green synthesis" a simple and inexpensive method. The Synthesis of AuNPs, using ginger extract is described here. The components found in ginger work as a stabilizing and reducing agent. Hydrogen tetrachloroaurate (HAuCl4) are mixed with the ginger extract to produce AuNPs. The Surface Plasmon Resonance (SPR) measured at λmax = 540 nm. UV-Vis, FTIR and Zeta potential are used to identify AuNPs, as well as AFM and SEM. Data indicate that AuNPs has a spherical structure. The results demonstrate that AuNPs stabilized by ascorbic acid were used as a colorimetric probe for Hg2+ ions, based on the production of (Au-Hg) amalgamate which made changes in their absorbance, due to its ability to reduce Hg2+ to Hg0, to enhance amalgamation. Practically, this procedure has successfully worked to detect Hg2+ in tap water as a sensitive and selective probe with upper limit of detection equal to 120 µM as well as the limit of detection (LOD) equal to 0.65 µM, so the method proved to be sensitive and selective probe.

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Section: Introductionmentioning

confidence: 99%

Biosynthetic Gold Nanoparticles as Sensitive and Selective Colorimetric Method for Mercury Ions

ABDULGHAFOR AHMED,

AHMED FARHAN,

MONİEM DADOOSH

et al. 2023

Journal of the Turkish Chemical Society Section A: Chemistry

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Functionalization of Gold Nanoparticles with Monosaccharide Mannose

Dash

Rao

Kamath

et al. 2021

RJPT

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Gold nanoparticles have found a wide range of application in biomedical sciences. Unique properties of these metal nanoparticles include surface plasmon resonance and size dependent colour change. Various molecules have been functionalized on the gold nanoparticles surface but carbohydrates have garnered attention due to their properties and their role in living systems. However certain challenges make carbohydrate-gold nanoparticles association difficult to obtain and stabilize. This study was carried out to chemically remodel gold nanoparticles by adding a monosaccharide mannose to its surface. A modified phase transfer method was used to synthesize gold nanoparticles. The surface of the nanoparticles was fixed with cyanuric chloride to serve as a linker. Mannose was then linked to the linker molecule. All three stages of the process, gold nanoparticles, and gold nanoparticles with linker and gold nanoparticles with the carbohydrate were analyzed for size and stability. Zeta potential and UV-vis data exhibited stable gold nanoparticles dispersion, successful binding of linker molecule as well as the carbohydrate. This study shows a simple, cost-effective and robust method of glycomodification of gold nanoparticles surface which can further find use in wide ranging applications.

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Study the effect of biosynthesized gold nanoparticles on the enzymatic activity of alpha-Amylase

Hameed

Nathir

Abdulsahib³

et al. 2022

RJPT

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In this paper, investigates the biosynthesis of gold nanoparticles (AuNPs) by biochemical method using Myrtus communis leaves extract as reducing agent and Chloroauric acid (HAuCl4) as precursors. X-Ray Diffraction (XRD), Scanning Electron Microscopy (SEM) and FTIR were used in addition to UV-visible spectroscopy (UV) in order to characterize the AuNPs. The biosynthesized AuNPs exhibited inhibitory effects on alpha amylase and alkaline phosphatase in sera of patient with type 2 Diabetes Miletus and the sera of healthy control subjects; the inhibition percentage with alpha amylase was 72 % and 45 % for patient and control group respectively. Oral consent obtained from the most of patients and healthy subjects before them being under study. Biological activities were investigated against some bacteria species to exploit AuNPs potential. Kinetic studies of alpha amylase exanimated. The goal of this study is to synthesized gold nanoparticles using simple, economical and environmentally green method. This stage is more suited to large-scale manufacturing since it is speedy and removes the complex steps in other bio-based methods.

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Dopamine sensor by Gold Nanoparticles Absorbed Redox behaving metal Complex

Cited by 8 publications

References 0 publications

Biosynthetic Gold Nanoparticles as Sensitive and Selective Colorimetric Method for Mercury Ions

Biosynthetic Gold Nanoparticles as Sensitive and Selective Colorimetric Method for Mercury Ions

Functionalization of Gold Nanoparticles with Monosaccharide Mannose

Study the effect of biosynthesized gold nanoparticles on the enzymatic activity of alpha-Amylase

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