Field-Effect Capacitors Decorated with Ligand-Stabilized Gold Nanoparticles: Modeling and Experiments
- Nanoparticles are recognized as highly attractive tunable materials for designing field-effect biosensors with enhanced performance. In this work, we present a theoretical model for electrolyte-insulator-semiconductor capacitors (EISCAP) decorated with ligand-stabilized charged gold nanoparticles. The charged AuNPs are taken into account as additional, nanometer-sized local gates. The capacitance-voltage (C–V) curves and constant-capacitance (ConCap) signals of the AuNP-decorated EISCAPs have been simulated. The impact of the AuNP coverage on the shift of the C–V curves and the ConCap signals was also studied experimentally on Al–p-Si–SiO₂ EISCAPs decorated with positively charged aminooctanethiol-capped AuNPs. In addition, the surface of the EISCAPs, modified with AuNPs, was characterized by scanning electron microscopy for different immobilization times of the nanoparticles.
Author: | Arshak PoghossianORCiD, Tobias KarschuckORCiD, Patrick Wagner, Michael Josef SchöningORCiD |
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DOI: | https://doi.org/10.3390/bios12050334 |
ISSN: | 2079-6374 |
Parent Title (English): | Biosensors |
Publisher: | MDPI |
Place of publication: | Basel |
Document Type: | Article |
Language: | English |
Year of Completion: | 2022 |
Date of first Publication: | 2022/05/13 |
Tag: | aminooctanethiol; capacitive model; electrolyte-insulator-semiconductor capacitors; field-effect sensor; gold nanoparticles; nanoparticle coverage |
Volume: | 12 |
Issue: | 5 |
Length: | Artikel 334 |
Note: | This article belongs to the Special Issue "Biosensors in Nanotechnology" |
Link: | https://doi.org/10.3390/bios12050334 |
Zugriffsart: | weltweit |
Institutes: | FH Aachen / INB - Institut für Nano- und Biotechnologien |
open_access (DINI-Set): | open_access |
collections: | Verlag / MDPI |
Open Access / Gold | |
Licence (German): | Creative Commons - Namensnennung |