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 |
|---|---|
| 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 |
| Date of the Publication (Server): | 2023/01/25 |
| 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 |
| collections: | Verlag / MDPI |
| Open Access / Gold | |
| Licence (German): |  Creative Commons - Namensnennung |
