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In Situ Growth of Surfactant-Free Gold Nanoparticles on Nitrogen-Doped Graphene Quantum Dots for Electrochemical Detection of Hydrogen Peroxide in Biological Environments

In this work, we report a green and simple strategy for the in situ growth of surfactant-free Au nanoparticles (Au NPs) on nitrogen-doped graphene quantum dots (Au NPs-N-GQDs). The formation of hybrid was achieved by just mixing the N-GQDs and HAuCl...-4H...O without addition of any other reductant... Full description

Journal Title: Analytical Chemistry (Washington) Feb 2015, Vol.87(3), p.1903
Main Author: Ju, Jian
Other Authors: Chen, Wei
Format: Electronic Article Electronic Article
Language: English
Subjects:
ID: ISSN: 0003-2700
Link: http://search.proquest.com/docview/1692394076/?pq-origsite=primo
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title: In Situ Growth of Surfactant-Free Gold Nanoparticles on Nitrogen-Doped Graphene Quantum Dots for Electrochemical Detection of Hydrogen Peroxide in Biological Environments
format: Article
creator:
  • Ju, Jian
  • Chen, Wei
subjects:
  • Biosensors
  • Graphene
  • Quantum Dots
  • Hydrogen Peroxide
  • Human
  • Gold
  • Nanoparticles
  • Surface Chemistry
  • Solid State Milieux (General) (So)
  • Analysis (MD)
  • Chemical Analysis (Ep)
  • Chemical Analysis (Ed)
  • Chemical Analysis (EC)
ispartof: Analytical Chemistry (Washington), Feb 2015, Vol.87(3), p.1903
description: In this work, we report a green and simple strategy for the in situ growth of surfactant-free Au nanoparticles (Au NPs) on nitrogen-doped graphene quantum dots (Au NPs-N-GQDs). The formation of hybrid was achieved by just mixing the N-GQDs and HAuCl...-4H...O without addition of any other reductant and surfactant. High-resolution transmission electron microscopy (HRTEM), X-ray diffraction (XRD), and X-ray photoelectron spectroscopy (XPS) characterizations clearly showed the formation of Au nanoparticles with predominantly exposed (111) facets which can provide more adsorption sites. Such nonsurfactant-capped Au NPs can provide naked catalytic surface with highly electrocatalytic activity. The Au NPs-N-GQDs exhibit high sensitivity and selectivity for electrochemical detection of hydrogen peroxide (H...O...) with a low detection limit of 0.12 ...M and sensitivity of 186.22 ...A/mM cm.... Importantly, the Au NPs-N-GQDs-based electrochemical biosensor has shown great potential applications for detection of H...O... levels in human serum samples and that released from human cervical cancer cells with satisfactory results. The present study demonstrates that such novel Au NPs-N-GQDs nanocomposite is promising for fabrication of nonenzymatic H...O... biosensors. (ProQuest: ... denotes formulae/symbols omitted.)
language: eng
source:
identifier: ISSN: 0003-2700
fulltext: no_fulltext
issn:
  • 00032700
  • 0003-2700
url: Link


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titleIn Situ Growth of Surfactant-Free Gold Nanoparticles on Nitrogen-Doped Graphene Quantum Dots for Electrochemical Detection of Hydrogen Peroxide in Biological Environments
creatorJu, Jian ; Chen, Wei
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ispartofAnalytical Chemistry (Washington), Feb 2015, Vol.87(3), p.1903
identifierISSN: 0003-2700
subjectBiosensors ; Graphene ; Quantum Dots ; Hydrogen Peroxide ; Human ; Gold ; Nanoparticles ; Surface Chemistry ; Solid State Milieux (General) (So) ; Analysis (MD) ; Chemical Analysis (Ep) ; Chemical Analysis (Ed) ; Chemical Analysis (EC)
descriptionIn this work, we report a green and simple strategy for the in situ growth of surfactant-free Au nanoparticles (Au NPs) on nitrogen-doped graphene quantum dots (Au NPs-N-GQDs). The formation of hybrid was achieved by just mixing the N-GQDs and HAuCl...-4H...O without addition of any other reductant and surfactant. High-resolution transmission electron microscopy (HRTEM), X-ray diffraction (XRD), and X-ray photoelectron spectroscopy (XPS) characterizations clearly showed the formation of Au nanoparticles with predominantly exposed (111) facets which can provide more adsorption sites. Such nonsurfactant-capped Au NPs can provide naked catalytic surface with highly electrocatalytic activity. The Au NPs-N-GQDs exhibit high sensitivity and selectivity for electrochemical detection of hydrogen peroxide (H...O...) with a low detection limit of 0.12 ...M and sensitivity of 186.22 ...A/mM cm.... Importantly, the Au NPs-N-GQDs-based electrochemical biosensor has shown great potential applications for detection of H...O... levels in human serum samples and that released from human cervical cancer cells with satisfactory results. The present study demonstrates that such novel Au NPs-N-GQDs nanocomposite is promising for fabrication of nonenzymatic H...O... biosensors. (ProQuest: ... denotes formulae/symbols omitted.)
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descriptionIn this work, we report a green and simple strategy for the in situ growth of surfactant-free Au nanoparticles (Au NPs) on nitrogen-doped graphene quantum dots (Au NPs-N-GQDs). The formation of hybrid was achieved by just mixing the N-GQDs and HAuCl...-4H...O without addition of any other reductant and surfactant. High-resolution transmission electron microscopy (HRTEM), X-ray diffraction (XRD), and X-ray photoelectron spectroscopy (XPS) characterizations clearly showed the formation of Au nanoparticles with predominantly exposed (111) facets which can provide more adsorption sites. Such nonsurfactant-capped Au NPs can provide naked catalytic surface with highly electrocatalytic activity. The Au NPs-N-GQDs exhibit high sensitivity and selectivity for electrochemical detection of hydrogen peroxide (H...O...) with a low detection limit of 0.12 ...M and sensitivity of 186.22 ...A/mM cm.... Importantly, the Au NPs-N-GQDs-based electrochemical biosensor has shown great potential applications for detection of H...O... levels in human serum samples and that released from human cervical cancer cells with satisfactory results. The present study demonstrates that such novel Au NPs-N-GQDs nanocomposite is promising for fabrication of nonenzymatic H...O... biosensors. (ProQuest: ... denotes formulae/symbols omitted.)
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abstractIn this work, we report a green and simple strategy for the in situ growth of surfactant-free Au nanoparticles (Au NPs) on nitrogen-doped graphene quantum dots (Au NPs-N-GQDs). The formation of hybrid was achieved by just mixing the N-GQDs and HAuCl...-4H...O without addition of any other reductant and surfactant. High-resolution transmission electron microscopy (HRTEM), X-ray diffraction (XRD), and X-ray photoelectron spectroscopy (XPS) characterizations clearly showed the formation of Au nanoparticles with predominantly exposed (111) facets which can provide more adsorption sites. Such nonsurfactant-capped Au NPs can provide naked catalytic surface with highly electrocatalytic activity. The Au NPs-N-GQDs exhibit high sensitivity and selectivity for electrochemical detection of hydrogen peroxide (H...O...) with a low detection limit of 0.12 ...M and sensitivity of 186.22 ...A/mM cm.... Importantly, the Au NPs-N-GQDs-based electrochemical biosensor has shown great potential applications for detection of H...O... levels in human serum samples and that released from human cervical cancer cells with satisfactory results. The present study demonstrates that such novel Au NPs-N-GQDs nanocomposite is promising for fabrication of nonenzymatic H...O... biosensors. (ProQuest: ... denotes formulae/symbols omitted.)
urlhttp://search.proquest.com/docview/1692394076/
date2015-02-01