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Integrated optical and electrochemical detection of Cu 2+ ions in water using a sandwich amino acidgold nanoparticle-based nano-biosensor consisting of a transparent-conductive platform

In this paper, an optical-electrochemical nano-biosensor was introduced for measuring Cu 2+ ion concentrations in water. A multi-step procedure was used to fabricate the transparent-conductive biosensor platform consisting of an l -cysteinegold nanoparticle-based sandwich structure. First, colloidal... Full description

Journal Title: RSC Advances 2019, Vol.9(16), pp.8882-8893
Main Author: Atapour, Mehdi
Other Authors: Amoabediny, Ghasem , Ahmadzadeh-Raji, Mojgan
Format: Electronic Article Electronic Article
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ID: ISSN: 2046-2069 ; DOI: 10.1039/c8ra09659g
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recordid: rscc8ra09659g
title: Integrated optical and electrochemical detection of Cu 2+ ions in water using a sandwich amino acidgold nanoparticle-based nano-biosensor consisting of a transparent-conductive platform
format: Article
creator:
  • Atapour, Mehdi
  • Amoabediny, Ghasem
  • Ahmadzadeh-Raji, Mojgan
subjects:
  • Gold
  • Gold
  • Electrochemical Analysis
  • Ph
  • Sandwich Structures
  • Substrates
  • Nanoparticles
  • Square Waves
  • Conductivity
  • Copper
  • Copper
  • Biosensors
  • Voltammetry
  • Biosensors
  • Buffer Solutions
  • Nanoparticles
  • Cysteine
  • Selectivity
  • Voltammetry
  • Drinking Water
ispartof: RSC Advances, 2019, Vol.9(16), pp.8882-8893
description: In this paper, an optical-electrochemical nano-biosensor was introduced for measuring Cu 2+ ion concentrations in water. A multi-step procedure was used to fabricate the transparent-conductive biosensor platform consisting of an l -cysteinegold nanoparticle-based sandwich structure. First, colloidal gold nanoparticles (GNPs) were synthesized according to the TurkevichFrens method with some modifications and then functionalized with l -cysteine molecules (GNP/ l -cys). Then, cyclic voltammetry was preformed in buffered solutions containing HAuCl 4 3H 2 O for gold nanoparticle electrodeposition on cleaned ITO glasses. The GNP-electrodeposited ITO glasses (ITO/GNPs) were thermally treated in air atmosphere for 1 hour at a temperature of 300 C. Following the procedure, the gold nanoparticles on ITO/GNPs substrates were functionalized with l -cysteine to prepare ITO/GNPs/ l -cys substrates. Finally, the sandwich-type substrates of ITO/GNPs/ l -cysCu 2+ l -cys/GNPs were fabricated by accumulation of Cu 2+ ions using an open circuit technique performed in copper ion buffer solutions in the presence of previously produced colloidal GNP/ l -cys nanoparticles. The effective parameters including GNP/ l -cys solution volume, pre-concentration pH and pre-concentration time on the LSPR and SWV responses were investigated and optimized. The fabricated transparent-conductive platforms were successfully assessed as a nano-biosensor for detection of copper ions using two different methods of square wave voltammetry (SWV) and localized surface plasmon resonance (LSPR). As a result, the proposed biosensor showed a high sensitivity, selectivity and a wide detectable concentration range to copper ions. The total linear range and the limit of detection (LOD) of the nano-biosensor were 10100000 nM (0.66354.6 ppb) and below 5 nM (0.3 ppb), respectively. The results demonstrated the potential of combining two different optical and electrochemical methods for quantitation of the single analyte on the same biosensor platform and obtaining richer data. Also, these results indicated that the developed LSPR-SWV biosensor was superior to many other copper biosensors presented in the literature in terms of linear range and LOD. The developed nano-biosensor was successfully applied in the determination of trace Cu 2+ concentration in actual tap water samples.
language:
source:
identifier: ISSN: 2046-2069 ; DOI: 10.1039/c8ra09659g
fulltext: fulltext
issn:
  • 2046-2069
  • 20462069
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titleIntegrated optical and electrochemical detection of Cu 2+ ions in water using a sandwich amino acidgold nanoparticle-based nano-biosensor consisting of a transparent-conductive platform
creatorAtapour, Mehdi ; Amoabediny, Ghasem ; Ahmadzadeh-Raji, Mojgan
ispartofRSC Advances, 2019, Vol.9(16), pp.8882-8893
identifierISSN: 2046-2069 ; DOI: 10.1039/c8ra09659g
descriptionIn this paper, an optical-electrochemical nano-biosensor was introduced for measuring Cu 2+ ion concentrations in water. A multi-step procedure was used to fabricate the transparent-conductive biosensor platform consisting of an l -cysteinegold nanoparticle-based sandwich structure. First, colloidal gold nanoparticles (GNPs) were synthesized according to the TurkevichFrens method with some modifications and then functionalized with l -cysteine molecules (GNP/ l -cys). Then, cyclic voltammetry was preformed in buffered solutions containing HAuCl 4 3H 2 O for gold nanoparticle electrodeposition on cleaned ITO glasses. The GNP-electrodeposited ITO glasses (ITO/GNPs) were thermally treated in air atmosphere for 1 hour at a temperature of 300 C. Following the procedure, the gold nanoparticles on ITO/GNPs substrates were functionalized with l -cysteine to prepare ITO/GNPs/ l -cys substrates. Finally, the sandwich-type substrates of ITO/GNPs/ l -cysCu 2+ l -cys/GNPs were fabricated by accumulation of Cu 2+ ions using an open circuit technique performed in copper ion buffer solutions in the presence of previously produced colloidal GNP/ l -cys nanoparticles. The effective parameters including GNP/ l -cys solution volume, pre-concentration pH and pre-concentration time on the LSPR and SWV responses were investigated and optimized. The fabricated transparent-conductive platforms were successfully assessed as a nano-biosensor for detection of copper ions using two different methods of square wave voltammetry (SWV) and localized surface plasmon resonance (LSPR). As a result, the proposed biosensor showed a high sensitivity, selectivity and a wide detectable concentration range to copper ions. The total linear range and the limit of detection (LOD) of the nano-biosensor were 10100000 nM (0.66354.6 ppb) and below 5 nM (0.3 ppb), respectively. The results demonstrated the potential of combining two different optical and electrochemical methods for quantitation of the single analyte on the same biosensor platform and obtaining richer data. Also, these results indicated that the developed LSPR-SWV biosensor was superior to many other copper biosensors presented in the literature in terms of linear range and LOD. The developed nano-biosensor was successfully applied in the determination of trace Cu 2+ concentration in actual tap water samples.
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subjectGold ; Gold ; Electrochemical Analysis ; Ph ; Sandwich Structures ; Substrates ; Nanoparticles ; Square Waves ; Conductivity ; Copper ; Copper ; Biosensors ; Voltammetry ; Biosensors ; Buffer Solutions ; Nanoparticles ; Cysteine ; Selectivity ; Voltammetry ; Drinking Water;
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titleIntegrated optical and electrochemical detection of Cu 2+ ions in water using a sandwich amino acidgold nanoparticle-based nano-biosensor consisting of a transparent-conductive platform
descriptionIn this paper, an optical-electrochemical nano-biosensor was introduced for measuring Cu 2+ ion concentrations in water. A multi-step procedure was used to fabricate the transparent-conductive biosensor platform consisting of an l -cysteinegold nanoparticle-based sandwich structure. First, colloidal gold nanoparticles (GNPs) were synthesized according to the TurkevichFrens method with some modifications and then functionalized with l -cysteine molecules (GNP/ l -cys). Then, cyclic voltammetry was preformed in buffered solutions containing HAuCl 4 3H 2 O for gold nanoparticle electrodeposition on cleaned ITO glasses. The GNP-electrodeposited ITO glasses (ITO/GNPs) were thermally treated in air atmosphere for 1 hour at a temperature of 300 C. Following the procedure, the gold nanoparticles on ITO/GNPs substrates were functionalized with l -cysteine to prepare ITO/GNPs/ l -cys substrates. Finally, the sandwich-type substrates of ITO/GNPs/ l -cysCu 2+ l -cys/GNPs were fabricated by accumulation of Cu 2+ ions using an open circuit technique performed in copper ion buffer solutions in the presence of previously produced colloidal GNP/ l -cys nanoparticles. The effective parameters including GNP/ l -cys solution volume, pre-concentration pH and pre-concentration time on the LSPR and SWV responses were investigated and optimized. The fabricated transparent-conductive platforms were successfully assessed as a nano-biosensor for detection of copper ions using two different methods of square wave voltammetry (SWV) and localized surface plasmon resonance (LSPR). As a result, the proposed biosensor showed a high sensitivity, selectivity and a wide detectable concentration range to copper ions. The total linear range and the limit of detection (LOD) of the nano-biosensor were 10100000 nM (0.66354.6 ppb) and below 5 nM (0.3 ppb), respectively. The results demonstrated the potential of combining two different optical and electrochemical methods for quantitation of the single analyte on the same biosensor platform and obtaining richer data. Also, these results indicated that the developed LSPR-SWV biosensor was superior to many other copper biosensors presented in the literature in terms of linear range and LOD. The developed nano-biosensor was successfully applied in the determination of trace Cu 2+ concentration in actual tap water samples.
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titleIntegrated optical and electrochemical detection of Cu 2+ ions in water using a sandwich amino acidgold nanoparticle-based nano-biosensor consisting of a transparent-conductive platform
authorAtapour, Mehdi ; Amoabediny, Ghasem ; Ahmadzadeh-Raji, Mojgan
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abstractIn this paper, an optical-electrochemical nano-biosensor was introduced for measuring Cu 2+ ion concentrations in water. A multi-step procedure was used to fabricate the transparent-conductive biosensor platform consisting of an l -cysteinegold nanoparticle-based sandwich structure. First, colloidal gold nanoparticles (GNPs) were synthesized according to the TurkevichFrens method with some modifications and then functionalized with l -cysteine molecules (GNP/ l -cys). Then, cyclic voltammetry was preformed in buffered solutions containing HAuCl 4 3H 2 O for gold nanoparticle electrodeposition on cleaned ITO glasses. The GNP-electrodeposited ITO glasses (ITO/GNPs) were thermally treated in air atmosphere for 1 hour at a temperature of 300 C. Following the procedure, the gold nanoparticles on ITO/GNPs substrates were functionalized with l -cysteine to prepare ITO/GNPs/ l -cys substrates. Finally, the sandwich-type substrates of ITO/GNPs/ l -cysCu 2+ l -cys/GNPs were fabricated by accumulation of Cu 2+ ions using an open circuit technique performed in copper ion buffer solutions in the presence of previously produced colloidal GNP/ l -cys nanoparticles. The effective parameters including GNP/ l -cys solution volume, pre-concentration pH and pre-concentration time on the LSPR and SWV responses were investigated and optimized. The fabricated transparent-conductive platforms were successfully assessed as a nano-biosensor for detection of copper ions using two different methods of square wave voltammetry (SWV) and localized surface plasmon resonance (LSPR). As a result, the proposed biosensor showed a high sensitivity, selectivity and a wide detectable concentration range to copper ions. The total linear range and the limit of detection (LOD) of the nano-biosensor were 10100000 nM (0.66354.6 ppb) and below 5 nM (0.3 ppb), respectively. The results demonstrated the potential of combining two different optical and electrochemical methods for quantitation of the single analyte on the same biosensor platform and obtaining richer data. Also, these results indicated that the developed LSPR-SWV biosensor was superior to many other copper biosensors presented in the literature in terms of linear range and LOD. The developed nano-biosensor was successfully applied in the determination of trace Cu 2+ concentration in actual tap water samples.
doi10.1039/c8ra09659g
pages8882-8893
date2019-03-18