Abstract

pH is a vital physiological parameter that can be used for disease diagnosis and treatment as well as in monitoring other biological processes. Metal/metal oxide based pH sensors have several advantages regarding their reliability, miniaturization, and cost-effectiveness, which are critical characteristics for in vivo applications. In this work, WO3 nanoparticles were electrodeposited on flexible substrates over metal electrodes with a sensing area of 1 mm(2). These sensors show a sensitivity of -56.7 +/- 1.3 mV/pH, in a wide pH range of 9 to 5. A proof of concept is also demonstrated using a flexible reference electrode in solid electrolyte with a curved surface. A good balance between the performance parameters (sensitivity), the production costs, and simplicity of the sensors was accomplished, as required for wearable biomedical devices.
Original languageEnglish
Pages (from-to)12226-12234
JournalAcs Applied Materials & Interfaces
Volume6
Issue number15
DOIs
Publication statusPublished - 13 Aug 2014

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pH sensors
Metals
Nanoparticles
Electrodes
Solid electrolytes
Sensors
Cost effectiveness
Oxides
Monitoring
Substrates
Costs

Keywords

  • electrodeposition
  • flexible
  • hydrothermal synthesis
  • lightweight
  • pH sensor
  • tungsten oxide nanoparticles

Cite this

@article{2d0b8200c1e6482999f65c79ab62e22a,
title = "WO3 nanoparticles-based conformable pH sensor",
abstract = "pH is a vital physiological parameter that can be used for disease diagnosis and treatment as well as in monitoring other biological processes. Metal/metal oxide based pH sensors have several advantages regarding their reliability, miniaturization, and cost-effectiveness, which are critical characteristics for in vivo applications. In this work, WO3 nanoparticles were electrodeposited on flexible substrates over metal electrodes with a sensing area of 1 mm(2). These sensors show a sensitivity of -56.7 +/- 1.3 mV/pH, in a wide pH range of 9 to 5. A proof of concept is also demonstrated using a flexible reference electrode in solid electrolyte with a curved surface. A good balance between the performance parameters (sensitivity), the production costs, and simplicity of the sensors was accomplished, as required for wearable biomedical devices.",
keywords = "electrodeposition, flexible, lightweight, hydrothermal synthesis, tungsten oxide nanoparticles, pH sensor, electrodeposition , flexible , hydrothermal synthesis , lightweight , pH sensor , tungsten oxide nanoparticles",
author = "Santos, {L{\'i}dia Sofia Leit{\~a}o} and Neto, {Joana P.} and Ana Crespo and Daniela Nunes and Nuno Costa and Fonseca, {Isabel Maria de Figueiredo Ligeiro da} and Barquinha, {Pedro Miguel C{\^a}ndido} and Pereira, {Luis Miguel Nunes} and Jorge Silva and Martins, {Rodrigo Ferr{\~a}o de Paiva} and Fortunato, {Elvira Maria Correia}",
note = "This work was funded by the Portuguese Science Foundation (FCT-MEC) through project EXCL/CTM-NAN/0201/2012, Strategic Project PEst-C/CTM/LA0025/2013-14, and the FCT-MCTES doctoral grants SFRH/BD/73810/2010 given to L.S. and SFRH/BD/76004/2011 given to J.N. Moreover, this work was also supported by E.F.'s ERC 2008 Advanced Grant (INVISIBLE contract number 228144).",
year = "2014",
month = "8",
day = "13",
doi = "10.1021/am501724h",
language = "English",
volume = "6",
pages = "12226--12234",
journal = "Acs Applied Materials & Interfaces",
issn = "1944-8244",
publisher = "American Chemical Society",
number = "15",

}

TY - JOUR

T1 - WO3 nanoparticles-based conformable pH sensor

AU - Santos, Lídia Sofia Leitão

AU - Neto, Joana P.

AU - Crespo, Ana

AU - Nunes, Daniela

AU - Costa, Nuno

AU - Fonseca, Isabel Maria de Figueiredo Ligeiro da

AU - Barquinha, Pedro Miguel Cândido

AU - Pereira, Luis Miguel Nunes

AU - Silva, Jorge

AU - Martins, Rodrigo Ferrão de Paiva

AU - Fortunato, Elvira Maria Correia

N1 - This work was funded by the Portuguese Science Foundation (FCT-MEC) through project EXCL/CTM-NAN/0201/2012, Strategic Project PEst-C/CTM/LA0025/2013-14, and the FCT-MCTES doctoral grants SFRH/BD/73810/2010 given to L.S. and SFRH/BD/76004/2011 given to J.N. Moreover, this work was also supported by E.F.'s ERC 2008 Advanced Grant (INVISIBLE contract number 228144).

PY - 2014/8/13

Y1 - 2014/8/13

N2 - pH is a vital physiological parameter that can be used for disease diagnosis and treatment as well as in monitoring other biological processes. Metal/metal oxide based pH sensors have several advantages regarding their reliability, miniaturization, and cost-effectiveness, which are critical characteristics for in vivo applications. In this work, WO3 nanoparticles were electrodeposited on flexible substrates over metal electrodes with a sensing area of 1 mm(2). These sensors show a sensitivity of -56.7 +/- 1.3 mV/pH, in a wide pH range of 9 to 5. A proof of concept is also demonstrated using a flexible reference electrode in solid electrolyte with a curved surface. A good balance between the performance parameters (sensitivity), the production costs, and simplicity of the sensors was accomplished, as required for wearable biomedical devices.

AB - pH is a vital physiological parameter that can be used for disease diagnosis and treatment as well as in monitoring other biological processes. Metal/metal oxide based pH sensors have several advantages regarding their reliability, miniaturization, and cost-effectiveness, which are critical characteristics for in vivo applications. In this work, WO3 nanoparticles were electrodeposited on flexible substrates over metal electrodes with a sensing area of 1 mm(2). These sensors show a sensitivity of -56.7 +/- 1.3 mV/pH, in a wide pH range of 9 to 5. A proof of concept is also demonstrated using a flexible reference electrode in solid electrolyte with a curved surface. A good balance between the performance parameters (sensitivity), the production costs, and simplicity of the sensors was accomplished, as required for wearable biomedical devices.

KW - electrodeposition

KW - flexible

KW - lightweight

KW - hydrothermal synthesis

KW - tungsten oxide nanoparticles

KW - pH sensor

KW - electrodeposition

KW - flexible

KW - hydrothermal synthesis

KW - lightweight

KW - pH sensor

KW - tungsten oxide nanoparticles

U2 - 10.1021/am501724h

DO - 10.1021/am501724h

M3 - Article

VL - 6

SP - 12226

EP - 12234

JO - Acs Applied Materials & Interfaces

JF - Acs Applied Materials & Interfaces

SN - 1944-8244

IS - 15

ER -