Au nanoparticle in situ decorated RGO nanocomposites for highly sensitive electrochemical genosensors

2019 ◽  
Vol 7 (5) ◽  
pp. 768-777 ◽  
Author(s):  
Chiara Ingrosso ◽  
Michela Corricelli ◽  
Francesca Bettazzi ◽  
Evgenia Konstantinidou ◽  
Giuseppe V. Bianco ◽  
...  
Keyword(s):  
Carboxylic Acid ◽  
Au Nanoparticle ◽  
Hybrid Nanocomposite ◽  
Au Nps ◽  
Highly Sensitive ◽  
Mirna Detection

A novel hybrid nanocomposite formed by RGO flakes, surface functionalized by 1-pyrene carboxylic acid (PCA), densely and uniformly in situ decorated by Au NPs, is reported, for miRNA detection.

Electrosynthesis of diphenyl carbonate by homogeneous Pd electrocatalysts using Au nanoparticles on graphene as efficient anodes

2016 ◽  
Vol 6 (15) ◽  
pp. 6002-6010 ◽  
Author(s):  
Ryoichi Kanega ◽  
Hitoshi Ogihara ◽  
Ichiro Yamanaka
Keyword(s):  
Au Nanoparticles ◽  
Au Nanoparticle ◽  
Diphenyl Carbonate ◽  
Au Nps

Electrochemical carbonylation of phenol (PhOH) with CO (1 atm) to form diphenyl carbonate (DPC) was studied by using a Pd-(in situ NHC) electrocatalyst and graphene-supported Au nanoparticle (Au NPs/GR) anodes.

DNA-templated in situ growth of AgNPs on SWNTs: a new approach for highly sensitive SERS assay of microRNA

2015 ◽  
Vol 51 (30) ◽  
pp. 6552-6555 ◽  
Author(s):  
Jing Zheng ◽  
Junhui Bai ◽  
Qifeng Zhou ◽  
Jishan Li ◽  
Yinhui Li ◽  
...  
Keyword(s):  
In Situ Growth ◽  
Hybrid Nanocomposite ◽  
New Approach ◽  
Microrna Detection ◽  
Highly Sensitive

The SWNT@AgNPs hybrid nanocomposite was employed to achieve microRNA detection.

Highly sensitive in situ monitoring of catalytic reactions by surface enhancement Raman spectroscopy on multifunctional Fe3O4/C/Au NPs

Nanoscale ◽  
2014 ◽  
Vol 6 (14) ◽  
pp. 7954-7958 ◽  
Author(s):  
Wenya Cai ◽  
Xianghu Tang ◽  
Bai Sun ◽  
Liangbao Yang
Keyword(s):  
Magnetic Field ◽  
Raman Spectroscopy ◽  
Catalytic Reaction ◽  
Catalytic Reactions ◽  
In Situ Monitoring ◽  
Au Nps ◽  
Highly Sensitive ◽  
Kinetics Of ◽  
The Magnetic Field

In situ monitoring and characterizing kinetics of catalytic reaction with SERS on multifunctional Fe3O4/C/Au NPs in the magnetic field.

scholarly journals Comparative Study of In Situ Techniques to Enlarge Gold Nanoparticles for Highly Sensitive Lateral Flow Immunoassay of SARS-CoV-2

Biosensors ◽  
2021 ◽  
Vol 11 (7) ◽  
pp. 229
Author(s):  
Vasily G. Panferov ◽  
Nadezhda A. Byzova ◽  
Sergey F. Biketov ◽  
Anatoly V. Zherdev ◽  
Boris B. Dzantiev
Keyword(s):  
Limit Of Detection ◽  
Lateral Flow ◽  
Lateral Flow Immunoassay ◽  
Silver Layer ◽  
Galvanic Replacement ◽  
Silver Enhancement ◽  
Ag Nps ◽  
Au Nps ◽  
Highly Sensitive

Three techniques were compared for lowering the limit of detection (LOD) of the lateral flow immunoassay (LFIA) of the receptor-binding domain of severe acute respiratory syndrome-related coronavirus 2 (SARS-CoV-2) based on the post-assay in situ enlargement of Au nanoparticles (Au NPs) on a test strip. Silver enhancement (growth of a silver layer over Au NPs—Au@Ag NPs) and gold enhancement (growth of a gold layer over Au NPs) techniques and the novel technique of galvanic replacement of Ag by Au in Au@Ag NPs causing the formation of Au@Ag-Au NPs were performed. All the enhancements were performed on-site after completion of the conventional LFIA and maintained equipment-free assay. The assays demonstrated lowering of LODs in the following rows: 488 pg/mL (conventional LFIA with Au NPs), 61 pg/mL (silver enhancement), 8 pg/mL (galvanic replacement), and 1 pg/mL (gold enhancement). Using gold enhancement as the optimal technique, the maximal dilution of inactivated SARS-CoV-2-containing samples increased 500 times. The developed LFIA provided highly sensitive and rapid (8 min) point-of-need testing.

Tuning the Photocatalytic Performance of Plasmonic Nanocomposites (ZnO/Aux) Driven in Visible Light

2019 ◽  
Vol 8 (1) ◽  
pp. 56-61
Author(s):  
Aneeya K. Samantara ◽  
Debasrita Dash ◽  
Dipti L. Bhuyan ◽  
Namita Dalai ◽  
Bijayalaxmi Jena
Keyword(s):  
Electron Transfer ◽  
Photocatalytic Activity ◽  
Visible Light ◽  
Transfer Rate ◽  
Photocatalytic Performance ◽  
Light Exposure ◽  
Au Nanoparticle ◽  
Electron Transfer Rate ◽  
Au Nps ◽  
Zno Nanostructure

: In this article, we explored the possibility of controlling the reactivity of ZnO nanostructures by modifying its surface with gold nanoparticles (Au NPs). By varying the concentration of Au with different wt% (x = 0.01, 0.05, 0.08, 1 and 2), we have synthesized a series of (ZnO/Aux) nanocomposites (NCs). A thorough investigation of the photocatalytic performance of different wt% of Au NPs on ZnO nanosurface has been carried out. It was observed that ZnO/Au0.08 nanocomposite showed the highest photocatalytic activity among all concentrations of Au on the ZnO surface, which degrades the dye concentration within 2 minutes of visible light exposure. It was further revealed that with an increase in the size of plasmonic nanoparticles beyond 0.08%, the accessible surface area of the Au nanoparticle decreases. The photon absorption capacity of Au nanoparticle decreases beyond 0.08% resulting in a decrease in electron transfer rate from Au to ZnO and a decrease of photocatalytic activity. Background: Due to the industrialization process, most of the toxic materials go into the water bodies, affecting the water and our ecological system. The conventional techniques to remove dyes are expensive and inefficient. Recently, heterogeneous semiconductor materials like TiO2 and ZnO have been regarded as potential candidates for the removal of dye from the water system. Objective: To investigate the photocatalytic performance of different wt% of Au NPs on ZnO nanosurface and the effect of the size of Au NPs for photocatalytic performance in the degradation process. Methods: A facile microwave method has been adopted for the synthesis of ZnO nanostructure followed by a reduction of gold salt in the presence of ZnO nanostructure to form the composite. Results: ZnO/Au0.08 nanocomposite showed the highest photocatalytic activity which degrades the dye concentration within 2 minutes of visible light exposure. The schematic mechanism of electron transfer rate was discussed. Conclusion: Raspberry shaped ZnO nanoparticles modified with different percentages of Au NPs showed good photocatalytic behavior in the degradation of dye molecules. The synergetic effect of unique morphology of ZnO and well anchored Au nanostructures plays a crucial role.

Synthesis of 3D hierarchically porous carbon@Bi-BiOCl nanocomposites via in situ generated NaCl crystals as templates for highly sensitive detection of Pb2+ and Cd2+

2019 ◽  
Vol 318 ◽  
pp. 460-470 ◽  
Author(s):  
Xiaolei Zhu ◽  
Bingchuan Liu ◽  
Longsheng Wu ◽  
Sijing Chen ◽  
Jiakuan Yang ◽  
...  
Keyword(s):  
Porous Carbon ◽  
Sensitive Detection ◽  
Hierarchically Porous ◽  
Highly Sensitive ◽  
Highly Sensitive Detection

scholarly journals Easy and fast in-situ functionalization of exfoliated 2D black phosphorus with gold nanoparticles

2021 ◽  
Author(s):  
Salvatore Moschetto ◽  
Andrea Ienco ◽  
Gabriele Manca ◽  
Manuel Serrano-Ruiz ◽  
Maurizio Peruzzini ◽  
...  
Keyword(s):  
Gold Nanoparticles ◽  
Black Phosphorus ◽  
Au Nps ◽  
In Situ Functionalization

Heterostructures of single- and few-layer black phosphorus (2D bP) functionalized with gold nanoparticles (Au NPs) have been recently reported in the literature, exploiting their intriguing properties and biocompatibility for catalytic,...

Highly Sensitive and Specific Mass Spectrometric Platform for miRNA Detection Based on the Multiple-Metal-Nanoparticle Tagging Strategy

2021 ◽  
Author(s):  
Yan-Li Zhu ◽  
Yan-Mei Lian ◽  
Ji-Kai Wang ◽  
Zeng-Ping Chen ◽  
Ru-Qin Yu
Keyword(s):  
Mass Spectrometric ◽  
Metal Nanoparticle ◽  
Specific Mass ◽  
Highly Sensitive ◽  
Mirna Detection

Macroscopical monolayer films of ordered arrays of gold nanoparticles as SERS substrates for in-situ quantitative detection in aqueous solutions

Nanoscale ◽  
2021 ◽  
Author(s):  
Lixiang Xing ◽  
Cui Wang ◽  
Yi Cao ◽  
Jihui Zhang ◽  
Haibing Xia
Keyword(s):  
Gold Nanoparticles ◽  
Volume Fraction ◽  
Water Volume ◽  
Quantitative Detection ◽  
Monolayer Films ◽  
Au Nps ◽  
Sers Substrates ◽  
Ordered Arrays ◽  
Water Volume Fraction

In this work, macroscopical monolayer films of ordered arrays of gold nanoparticles (MMF-OA-Au NPs) are successfully prepared at the interfaces of toluene-diethylene glycol (DEG) with a water volume fraction of...

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