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dc.contributor.author
Piccinini, Esteban
dc.contributor.author
Alberti, Sebastián
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Longo, Gabriel Sebastian
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Berninger, Teresa
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Breu, Josef
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Dostalek, Jakub
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Azzaroni, Omar
dc.contributor.author
Knoll, Wolfgang
dc.date.available
2020-03-20T18:09:44Z
dc.date.issued
2018-05
dc.identifier.citation
Piccinini, Esteban; Alberti, Sebastián; Longo, Gabriel Sebastian; Berninger, Teresa; Breu, Josef; et al.; Pushing the Boundaries of Interfacial Sensitivity in Graphene FET Sensors: Polyelectrolyte Multilayers Strongly Increase the Debye Screening Length; American Chemical Society; Journal of Physical Chemistry C; 122; 18; 5-2018; 10181-10188
dc.identifier.issn
1932-7447
dc.identifier.uri
http://hdl.handle.net/11336/100432
dc.description.abstract
Nanomaterial-based FET sensors represent an attractive platform for ultrasensitive, real-time, and label-free detection of chemical and biological species. Nevertheless, because their response is screened by mobile ions, it remains a challenge to use them to sense in physiological ionic strength solutions. In this work, it is demonstrated, both experimentally and theoretically, that polyelectrolyte multilayers are capable of increasing the sensing range of graphene-based FETs. Potential shifts at graphene surfaces and film thickness are recorded upon the construction of PDADMAC/PSS polyelectrolyte multilayer (PEM) films. By correlation of the potential shift with the film thickness, the electrostatic screening length and the concentration of mobile ion inside the films have been deduced. Across the polymer interface the Debye length is increased more than 1 order of magnitude. The fundamentals of this strategy are described by a conceptually simple thermodynamic model, which accounts for the entropy loss of ion confinement and incorporates the effect of ions finite volume. Interestingly, the electrostatic screening inside the film strongly depends on the polymer density and the ionic strength of the solution. Of particular interest in physiological condition sensing, the PEM interfaces can extend the Debye length from 0.8 to 10 nm.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
American Chemical Society
dc.rights
info:eu-repo/semantics/restrictedAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
FET SENSORS
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POLYELECTROLYTE MULTILAYER
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DEBYE LENGTH
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THERMODYNAMIC MODEL
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Físico-Química, Ciencia de los Polímeros, Electroquímica
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Ciencias Químicas
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CIENCIAS NATURALES Y EXACTAS
dc.title
Pushing the Boundaries of Interfacial Sensitivity in Graphene FET Sensors: Polyelectrolyte Multilayers Strongly Increase the Debye Screening Length
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2020-03-16T14:02:18Z
dc.journal.volume
122
dc.journal.number
18
dc.journal.pagination
10181-10188
dc.journal.pais
Estados Unidos
dc.journal.ciudad
Washington
dc.description.fil
Fil: Piccinini, Esteban. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas. Universidad Nacional de La Plata. Facultad de Ciencias Exactas. Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas; Argentina
dc.description.fil
Fil: Alberti, Sebastián. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas. Universidad Nacional de La Plata. Facultad de Ciencias Exactas. Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas; Argentina
dc.description.fil
Fil: Longo, Gabriel Sebastian. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas. Universidad Nacional de La Plata. Facultad de Ciencias Exactas. Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas; Argentina
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Fil: Berninger, Teresa. Austrian Institute of Technology; Austria
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Fil: Breu, Josef. University of Bayreuth; Alemania
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Fil: Dostalek, Jakub. Austrian Institute of Technology; Austria
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Fil: Azzaroni, Omar. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas. Universidad Nacional de La Plata. Facultad de Ciencias Exactas. Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas; Argentina
dc.description.fil
Fil: Knoll, Wolfgang. Austrian Institute of Technology; Austria
dc.journal.title
Journal of Physical Chemistry C
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/http://pubs.acs.org/doi/10.1021/acs.jpcc.7b11128
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1021/acs.jpcc.7b11128
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