| Autor: |
J. Smulko, K. Drozdowska, A. Rehman, T. Welearegay, L. Österlund, S. Rumyantsev, G. Cywiński, B. Stonio, A. Krajewska, M. Filipiak, P. Sai |
| Rok vydání: |
2023 |
| Popis: |
We report results of the current-voltage characteristics and low-frequency noise in Au nanoparticle (AuNP) decorated graphene-Si Schottky barrier diodes. Measurements were conducted in ambient air with addition of either of two organic vapours, tetrahydrofuran ((CH2)4O; THF) and chloroform (CHCl3), as also during yellow light illumination (592 nm), close to the measured particle plasmon polariton frequency of the Au nanoparticle layer. We observed a shift of the DC characteristics at forward voltages (forward resistance region) when tetrahydrofuran vapour was admitted (in Au-decorated graphene-Si Schottky diode), and a tiny shift under yellow irradiation when chloroform was added (in not decorated graphene-Si Schottky diode). Significantly larger difference in the low-frequency noise was observed for the two gases during yellow light irradiation, compared with no illumination. The noise intensity was suppressed by AuNPs when compared with noise in graphene-Si Schottky diode without an AuNP layer. We conclude that flicker noise generated in the investigated Au-decorated Schottky diodes can be utilized for gas detection. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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