Raman Spectroscopy of Graphene/CNT Layers Deposited on Interdigit Sensors for Application in Gas Detection
Graphene/CNT layers were deposited onto platinum electrodes of an interdigitated sensor using radio-frequency magnetron sputtering. The graphene/CNTs were synthesized in an Argon atmosphere at a pressure of (2 × 10<sup>−2</sup>–5 × 10<sup>−3</sup>) mbar, with the substrate ma...
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MDPI AG
2025-01-01
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| author | Stefan-Marian Iordache Ana-Maria Iordache Ana-Maria Florea (Raduta) Stefan Caramizoiu Catalin Parvulescu Flaviu Baiasu Irina Negut Bogdan Bita |
| author_facet | Stefan-Marian Iordache Ana-Maria Iordache Ana-Maria Florea (Raduta) Stefan Caramizoiu Catalin Parvulescu Flaviu Baiasu Irina Negut Bogdan Bita |
| author_sort | Stefan-Marian Iordache |
| collection | DOAJ |
| description | Graphene/CNT layers were deposited onto platinum electrodes of an interdigitated sensor using radio-frequency magnetron sputtering. The graphene/CNTs were synthesized in an Argon atmosphere at a pressure of (2 × 10<sup>−2</sup>–5 × 10<sup>−3</sup>) mbar, with the substrate maintained at 300 °C either through continuous heating with an electronically controlled heater or by applying a −200 V bias using a direct current power supply throughout the deposition process. The study compares the surface morphology, carbon atom arrangement within the layer volumes, and electrical properties of the films as influenced by the different methods of substrate heating. X-ray diffraction and Raman spectroscopy confirmed the formation of CNTs within the graphene matrix. Additionally, scanning electron microscopy revealed that the carbon nanotubes are aligned and organized into cluster-like structure. The graphene/CNT layers produced at higher pressures present exponential I–V characteristics that ascertain the semiconducting character of the layers and their suitability for applications in gas sensing. |
| format | Article |
| id | doaj-art-362dac8d275a491e9bd1008bc8f965bd |
| institution | DOAJ |
| issn | 2311-5629 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | C |
| spelling | doaj-art-362dac8d275a491e9bd1008bc8f965bd2025-08-20T02:42:39ZengMDPI AGC2311-56292025-01-01111910.3390/c11010009Raman Spectroscopy of Graphene/CNT Layers Deposited on Interdigit Sensors for Application in Gas DetectionStefan-Marian Iordache0Ana-Maria Iordache1Ana-Maria Florea (Raduta)2Stefan Caramizoiu3Catalin Parvulescu4Flaviu Baiasu5Irina Negut6Bogdan Bita7Optospintronics Department, National Institute of Research and Development for Optoelectronics-INOE 2000, 409 Atomistilor, 077125 Magurele, RomaniaOptospintronics Department, National Institute of Research and Development for Optoelectronics-INOE 2000, 409 Atomistilor, 077125 Magurele, RomaniaOptospintronics Department, National Institute of Research and Development for Optoelectronics-INOE 2000, 409 Atomistilor, 077125 Magurele, RomaniaOptospintronics Department, National Institute of Research and Development for Optoelectronics-INOE 2000, 409 Atomistilor, 077125 Magurele, RomaniaNational Institute of Microtechnologies, Erou Iancu Nicolae, No. 126A, P.O. Box MG 07, 077190 Voluntari, RomaniaDepartment of Electricity, Solid-State Physics and Biophysics, Faculty of Physics, University of Bucharest, 405 Atomistilor, 077125 Magurele, RomaniaNational Institute for Laser, Plasma and Radiation Physics, 409 Atomistilor Street, P.O. Box MG 36, 077125 Magurele, RomaniaOptospintronics Department, National Institute of Research and Development for Optoelectronics-INOE 2000, 409 Atomistilor, 077125 Magurele, RomaniaGraphene/CNT layers were deposited onto platinum electrodes of an interdigitated sensor using radio-frequency magnetron sputtering. The graphene/CNTs were synthesized in an Argon atmosphere at a pressure of (2 × 10<sup>−2</sup>–5 × 10<sup>−3</sup>) mbar, with the substrate maintained at 300 °C either through continuous heating with an electronically controlled heater or by applying a −200 V bias using a direct current power supply throughout the deposition process. The study compares the surface morphology, carbon atom arrangement within the layer volumes, and electrical properties of the films as influenced by the different methods of substrate heating. X-ray diffraction and Raman spectroscopy confirmed the formation of CNTs within the graphene matrix. Additionally, scanning electron microscopy revealed that the carbon nanotubes are aligned and organized into cluster-like structure. The graphene/CNT layers produced at higher pressures present exponential I–V characteristics that ascertain the semiconducting character of the layers and their suitability for applications in gas sensing.https://www.mdpi.com/2311-5629/11/1/9graphenecarbon nanotubesrf magnetron sputtering dischargesRaman spectroscopy |
| spellingShingle | Stefan-Marian Iordache Ana-Maria Iordache Ana-Maria Florea (Raduta) Stefan Caramizoiu Catalin Parvulescu Flaviu Baiasu Irina Negut Bogdan Bita Raman Spectroscopy of Graphene/CNT Layers Deposited on Interdigit Sensors for Application in Gas Detection C graphene carbon nanotubes rf magnetron sputtering discharges Raman spectroscopy |
| title | Raman Spectroscopy of Graphene/CNT Layers Deposited on Interdigit Sensors for Application in Gas Detection |
| title_full | Raman Spectroscopy of Graphene/CNT Layers Deposited on Interdigit Sensors for Application in Gas Detection |
| title_fullStr | Raman Spectroscopy of Graphene/CNT Layers Deposited on Interdigit Sensors for Application in Gas Detection |
| title_full_unstemmed | Raman Spectroscopy of Graphene/CNT Layers Deposited on Interdigit Sensors for Application in Gas Detection |
| title_short | Raman Spectroscopy of Graphene/CNT Layers Deposited on Interdigit Sensors for Application in Gas Detection |
| title_sort | raman spectroscopy of graphene cnt layers deposited on interdigit sensors for application in gas detection |
| topic | graphene carbon nanotubes rf magnetron sputtering discharges Raman spectroscopy |
| url | https://www.mdpi.com/2311-5629/11/1/9 |
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