One pot fabrication of graphene-bimetallic nanoparticles-based acetylcholinesterase electrochemical biosensor with ultralow detection limit toward methyl parathion

2019 ◽  
Vol 6 (10) ◽  
pp. 105093 ◽  
Author(s):  
Xianzhe Chen ◽  
Jianfang Wang ◽  
Zhuoliang Liu ◽  
Yujiao Li ◽  
Jian Huang ◽  
...  
Keyword(s):  
Detection Limit ◽  
Methyl Parathion ◽  
Electrochemical Biosensor ◽  
Bimetallic Nanoparticles ◽  
One Pot

Sensitive Hg2+ Ion Detection Using Metal Enhanced Fluorescence of Novel Polyvinyl Pyrrolidone (PVP)-Templated Gold Nanoparticles

2018 ◽  
Vol 72 (11) ◽  
pp. 1645-1652 ◽  
Author(s):  
Kailong Dong ◽  
Jiasheng Zhou ◽  
Taiqun Yang ◽  
Shan Dai ◽  
Hao Tan ◽  
...  
Keyword(s):  
Gold Nanoparticles ◽  
Detection Limit ◽  
Au Nanoparticles ◽  
Polyvinyl Pyrrolidone ◽  
Quenching Mechanism ◽  
Ion Detection ◽  
Enhanced Fluorescence ◽  
Metal Enhanced Fluorescence ◽  
One Pot ◽  
Au Nps

In this study, we report a straightforward strategy for Hg2+ ion detection. Fluorescent Au nanoparticles (NPs) were one-pot synthesized using a polymer (polyvinyl pyrrolidone [PVP]) as both capping and fluorescence agent. The as-synthesized PVP-Au NPs showed a remarkably rapid response selectively for Hg2+ ions compared to 14 other metal ions. The detection limit of Hg2+ was estimated at 100 nM. We discuss the emission and quenching mechanism of the PVP-Au NPs, the former being attributed to metal enhanced fluorescence and the latter being related to static quenching by Hg2+. The fluorescence of PVP-Au NPs offers an efficient and reliable strategy for Hg2+ ions detection. They therefore have a great potential for applications in health and environmental monitoring.

A one-pot route to the synthesis of alloyed Cu/Ag bimetallic nanoparticles with different mass ratios for catalytic reduction of 4-nitrophenol

2015 ◽  
Vol 3 (7) ◽  
pp. 3450-3455 ◽  
Author(s):  
Wei Wu ◽  
Mei Lei ◽  
Shuanglei Yang ◽  
Li Zhou ◽  
Li Liu ◽  
...  
Keyword(s):  
Bimetallic Catalysts ◽  
High Performance ◽  
Bimetallic Nanoparticles ◽  
Catalytic Reduction ◽  
Low Cost ◽  
Industrial Applications ◽  
Research Interest ◽  
Alloy Nanoparticles ◽  
One Pot ◽  
Copper Based Alloy

Copper-based alloy nanoparticles (NPs) have recently triggered much research interest for the development of low-cost and high-performance bimetallic catalysts that have industrial applications.

One-pot, seedless synthesis of flowerlike Au–Pd bimetallic nanoparticles with core-shell-like structure via sodium citrate coreduction of metal ions

CrystEngComm ◽  
2012 ◽  
Vol 14 (20) ◽  
pp. 7036 ◽  
Author(s):  
Jishu Han ◽  
Ziwei Zhou ◽  
Yue Yin ◽  
Xintao Luo ◽  
Jing Li ◽  
...  
Keyword(s):  
Metal Ions ◽  
Sodium Citrate ◽  
Bimetallic Nanoparticles ◽  
Core Shell ◽  
One Pot

Electrochemical biosensor for miRNA-21 based on gold-platinum bimetallic nanoparticles coated 3-aminopropyltriethoxy silane

2020 ◽  
Vol 609 ◽  
pp. 113908 ◽  
Author(s):  
Anu Bharti ◽  
Sakshi Mittal ◽  
Shilpa Rana ◽  
Divya Dahiya ◽  
Navneet Agnihotri ◽  
...  
Keyword(s):  
Electrochemical Biosensor ◽  
Bimetallic Nanoparticles ◽  
Gold Platinum

scholarly journals Rapid flow injection electrochemical detection of 3,3′,4,4′ tetrachlorobiphenyl using stabilized lipid membranes with incorporated sheep antibody

2013 ◽  
Vol 11 (2) ◽  
pp. 320-323 ◽  
Author(s):  
Dimitrios Nikolelis ◽  
Nikolas Psaroudakis ◽  
Antonis Michaloliakos ◽  
Georgia-Paraskevi Nikoleli ◽  
Michael Scoullos
Keyword(s):  
Detection Limit ◽  
Ethylene Glycol ◽  
Electrochemical Detection ◽  
Flow Injection ◽  
Lipid Membranes ◽  
Electrochemical Biosensor ◽  
Glycol Dimethacrylate ◽  
Lipid Film ◽  
Rapid Flow ◽  
Number Of Cycles

AbstractAn electrochemical biosensor based on a supported polymerized lipid film with incorporated sheep anti-3,3′,4,4′ tetrachlorobiphenyl (PCB congener 77) antibody using flow injection analysis was developed. The polymerized lipid film contained 85% (w/w) dipalmitoylphosphatidylcholine (DPPC) and 15% (w/w) dipalmitoylphosphatidic acid (DPPA), methacrylic acid, ethylene glycol dimethacrylate, AIBN and sheep anti-congener 77 antiserum. Congener 77 was injected into flowing carrier electrolyte and the flow stopped to detect the antigen. These membranes gave only a single transient proportional to log [congener 77] from 10−8 to 10−5 M, with a detection limit of ca. 10−8 M. A membrane containing 35% (w/w) DPPA was used to examine regeneration. The maximum number of cycles was about 5.

scholarly journals Presence of oOrganophosphate Insecticides in fish of the Amazon River

2003 ◽  
Vol 33 (2) ◽  
pp. 325-338 ◽  
Author(s):  
Nicolas SOUMIS ◽  
Marc LUCOTTE ◽  
Delaine SAMPAIO ◽  
Diane C. ALMEIDA ◽  
Dalie GIROUX ◽  
...  
Keyword(s):  
Detection Limit ◽  
Lipid Content ◽  
Fish Consumption ◽  
Methyl Parathion ◽  
Daily Basis ◽  
Fish Diet ◽  
Interspecific Differences ◽  
Fish Lipid ◽  
Daily Intakes ◽  
Amazonian Region

Trace levels of three organophosphate insecticides (OPI) were detected in eight fish species from the region of Santarém, State of Pará, Brazil. Individual concentrations of OPI in fish ranged from less than the detection limit to 2,1 ppb. Mean concentrations of chlorpyrifos, malathion, and methyl-parathion were 0,3 ± 0,3, 0,1 ± 0,1, and 0,3 ± 0,3 ppb, respectively. Pellona flavipinnis, the largest and fattest piscivorous species analyzed, was the most contaminated. Since an inhabitant of this Amazonian region consumes 220 g of fish per day on average, ingested doses of chlorpyrifos, malathion, and methyl-parathion may reach up to 308, 220, and 462 ng·d-1, respectively. Compared to acceptable daily intakes (ADI), quantities of OPI absorbed via fish consumption on a daily basis are far below deleterious levels. We estimated that even considering the highest OPI contents detected, the average daily fish consumption of anadult of 60 kg would have to increase by ca. 1 950, 5 450, and 2 600 times to reach ADI of chlorpyrifos, malathion, and methyl-parathion, respectively. Neither fish diet nor fish lipid content enabled us to completely explain the interspecific differences observed.

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