Dual Monitoring of Surface Reactions in Real Time by Combined Surface-Plasmon Resonance and Field-Effect Transistor Interrogation

By combining surface plasmon resonance (SPR) and electrolyte gated field-effect transistor (EG-FET) methods in a single analytical device we introduce a novel tool for surface investigations, enabling simultaneous measurements of the surface mass and charge density changes in real time. This is real...

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Autores principales: Aspermair, Patrik, Ramach, Ulrich, Reiner-Rozman, Ciril, Fossati, Stefan, Lechner, Bernadette, Moya, Sergio E., Azzaroni, Omar, Dostalek, Jakub, Szunerits, Sabine, Knoll, Wolfgang, Bintinger, Johannes
Formato: Articulo
Lenguaje:Inglés
Publicado: 2020
Materias:
Ciencias Exactas
Química
field-effect transistor
surface plasmon resonance
surface mass
charge density changes
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/140330
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-140330
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Ciencias Exactas
Química
field-effect transistor
surface plasmon resonance
surface mass
charge density changes
spellingShingle Ciencias Exactas
Química
field-effect transistor
surface plasmon resonance
surface mass
charge density changes
Aspermair, Patrik
Ramach, Ulrich
Reiner-Rozman, Ciril
Fossati, Stefan
Lechner, Bernadette
Moya, Sergio E.
Azzaroni, Omar
Dostalek, Jakub
Szunerits, Sabine
Knoll, Wolfgang
Bintinger, Johannes
Dual Monitoring of Surface Reactions in Real Time by Combined Surface-Plasmon Resonance and Field-Effect Transistor Interrogation
topic_facet Ciencias Exactas
Química
field-effect transistor
surface plasmon resonance
surface mass
charge density changes
description By combining surface plasmon resonance (SPR) and electrolyte gated field-effect transistor (EG-FET) methods in a single analytical device we introduce a novel tool for surface investigations, enabling simultaneous measurements of the surface mass and charge density changes in real time. This is realized using a gold sensor surface that simultaneously serves as a gate electrode of the EG-FET and as the SPR active interface. This novel platform has the potential to provide new insights into (bio)adsorption processes on planar solid surfaces by directly relating complementary measurement principles based on (i) detuning of SPR as a result of the modification of the interfacial refractive index profile by surface adsorption processes and (ii) change of output current as a result of the emanating effective gate voltage modulations. Furthermore, combination of the two complementary sensing concepts allows for the comparison and respective validation of both analytical techniques. A theoretical model is derived describing the mass uptake and evolution of surface charge density during polyelectrolyte multilayer formation. We demonstrate the potential of this combined platform through the observation of layer-by-layer assembly of PDADMAC and PSS. These simultaneous label-free and real-time measurements allow new insights into complex processes at the solid-liquid interface (like non-Fickian ion diffusion), which are beyond the scope of each individual tool.
format Articulo
Articulo
author Aspermair, Patrik
Ramach, Ulrich
Reiner-Rozman, Ciril
Fossati, Stefan
Lechner, Bernadette
Moya, Sergio E.
Azzaroni, Omar
Dostalek, Jakub
Szunerits, Sabine
Knoll, Wolfgang
Bintinger, Johannes
author_facet Aspermair, Patrik
Ramach, Ulrich
Reiner-Rozman, Ciril
Fossati, Stefan
Lechner, Bernadette
Moya, Sergio E.
Azzaroni, Omar
Dostalek, Jakub
Szunerits, Sabine
Knoll, Wolfgang
Bintinger, Johannes
author_sort Aspermair, Patrik
title Dual Monitoring of Surface Reactions in Real Time by Combined Surface-Plasmon Resonance and Field-Effect Transistor Interrogation
title_short Dual Monitoring of Surface Reactions in Real Time by Combined Surface-Plasmon Resonance and Field-Effect Transistor Interrogation
title_full Dual Monitoring of Surface Reactions in Real Time by Combined Surface-Plasmon Resonance and Field-Effect Transistor Interrogation
title_fullStr Dual Monitoring of Surface Reactions in Real Time by Combined Surface-Plasmon Resonance and Field-Effect Transistor Interrogation
title_full_unstemmed Dual Monitoring of Surface Reactions in Real Time by Combined Surface-Plasmon Resonance and Field-Effect Transistor Interrogation
title_sort dual monitoring of surface reactions in real time by combined surface-plasmon resonance and field-effect transistor interrogation
publishDate 2020
url http://sedici.unlp.edu.ar/handle/10915/140330
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