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.
| Verfasserangaben: | Arshak PoghossianORCiD, Tobias KarschuckORCiD, Patrick Wagner, Michael Josef SchöningORCiD |
|---|---|
| DOI: | https://doi.org/10.3390/bios12050334 |
| ISSN: | 2079-6374 |
| Titel des übergeordneten Werkes (Englisch): | Biosensors |
| Verlag: | MDPI |
| Verlagsort: | Basel |
| Dokumentart: | Wissenschaftlicher Artikel |
| Sprache: | Englisch |
| Erscheinungsjahr: | 2022 |
| Datum der Erstveröffentlichung: | 13.05.2022 |
| Datum der Publikation (Server): | 25.01.2023 |
| Freies Schlagwort / Tag: | aminooctanethiol; capacitive model; electrolyte-insulator-semiconductor capacitors; field-effect sensor; gold nanoparticles; nanoparticle coverage |
| Jahrgang: | 12 |
| Ausgabe / Heft: | 5 |
| Umfang: | Artikel 334 |
| Bemerkung: | This article belongs to the Special Issue "Biosensors in Nanotechnology" |
| Link: | https://doi.org/10.3390/bios12050334 |
| Zugriffsart: | weltweit |
| Fachbereiche und Einrichtungen: | FH Aachen / INB - Institut für Nano- und Biotechnologien |
| collections: | Verlag / MDPI |
| Open Access / Gold | |
| Lizenz (Deutsch): |  Creative Commons - Namensnennung |
