Tuning Carbon Nanofiber Density for Optimized Sensing of Ethanol

M. Shooshtari; S. Vollebregt; S. Pahlavan; T. Serrano-Gotarredona; B. Linares-Barranco

doi:10.1109/SENSORS59705.2025.11330369

Tuning Carbon Nanofiber Density for Optimized Sensing of Ethanol

M. Shooshtari, S. Vollebregt, S. Pahlavan, T. Serrano-Gotarredona, B. Linares-Barranco

Electronic Components, Technology and Materials

Research output: Chapter in Book/Conference proceedings/Edited volume › Conference contribution › Scientific › peer-review

Abstract

In this study, we investigated the effect of vertically aligned carbon nanofiber (VACNF) density on ethanol vapor sensing performance. VACNFs were synthesized on Si substrates using plasma-enhanced chemical vapor deposition (PECVD), where varying the acetylene flow rate resulted in different fiber densities. Morphological characterization confirmed that higher acetylene flow leads to improved alignment and denser CNF networks. Raman spectroscopy revealed reduced defect levels and increased graphitization with increasing density. Gas sensing measurements showed that moderate to high CNF densities significantly enhance sensor conductivity and ethanol sensitivity due to improved charge transport paths and increased active surface area. These results highlight the importance of CNF density optimization in designing high-performance gas sensors.

Original language	English
Title of host publication	Proceedings of the 2025 IEEE SENSORS
Place of Publication	Piscataway
Publisher	IEEE
Number of pages	4
ISBN (Electronic)	979-8-3315-4467-6
ISBN (Print)	979-8-3315-4468-3
DOIs	https://doi.org/10.1109/SENSORS59705.2025.11330369
Publication status	Published - 2025
Event	2025 IEEE SENSORS - Vancouver, Canada Duration: 19 Oct 2025 → 22 Oct 2025

Conference

Conference	2025 IEEE SENSORS
Country/Territory	Canada
City	Vancouver
Period	19/10/25 → 22/10/25

Keywords

Gas sensor
Fiber Density
Raman Spectroscopy

Access to Document

10.1109/SENSORS59705.2025.11330369

Embargoed Document

Tuning_Carbon_Nanofiber_Density_for_Optimized_Sensing_of_Ethanol
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Embargo ends: 19/07/26

Cite this

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title = "Tuning Carbon Nanofiber Density for Optimized Sensing of Ethanol",

abstract = "In this study, we investigated the effect of vertically aligned carbon nanofiber (VACNF) density on ethanol vapor sensing performance. VACNFs were synthesized on Si substrates using plasma-enhanced chemical vapor deposition (PECVD), where varying the acetylene flow rate resulted in different fiber densities. Morphological characterization confirmed that higher acetylene flow leads to improved alignment and denser CNF networks. Raman spectroscopy revealed reduced defect levels and increased graphitization with increasing density. Gas sensing measurements showed that moderate to high CNF densities significantly enhance sensor conductivity and ethanol sensitivity due to improved charge transport paths and increased active surface area. These results highlight the importance of CNF density optimization in designing high-performance gas sensors.",

keywords = "Gas sensor, Fiber Density, Raman Spectroscopy",

author = "M. Shooshtari and S. Vollebregt and S. Pahlavan and T. Serrano-Gotarredona and B. Linares-Barranco",

year = "2025",

doi = "10.1109/SENSORS59705.2025.11330369",

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T1 - Tuning Carbon Nanofiber Density for Optimized Sensing of Ethanol

AU - Shooshtari, M.

AU - Vollebregt, S.

AU - Pahlavan, S.

AU - Serrano-Gotarredona, T.

AU - Linares-Barranco, B.

PY - 2025

Y1 - 2025

N2 - In this study, we investigated the effect of vertically aligned carbon nanofiber (VACNF) density on ethanol vapor sensing performance. VACNFs were synthesized on Si substrates using plasma-enhanced chemical vapor deposition (PECVD), where varying the acetylene flow rate resulted in different fiber densities. Morphological characterization confirmed that higher acetylene flow leads to improved alignment and denser CNF networks. Raman spectroscopy revealed reduced defect levels and increased graphitization with increasing density. Gas sensing measurements showed that moderate to high CNF densities significantly enhance sensor conductivity and ethanol sensitivity due to improved charge transport paths and increased active surface area. These results highlight the importance of CNF density optimization in designing high-performance gas sensors.

AB - In this study, we investigated the effect of vertically aligned carbon nanofiber (VACNF) density on ethanol vapor sensing performance. VACNFs were synthesized on Si substrates using plasma-enhanced chemical vapor deposition (PECVD), where varying the acetylene flow rate resulted in different fiber densities. Morphological characterization confirmed that higher acetylene flow leads to improved alignment and denser CNF networks. Raman spectroscopy revealed reduced defect levels and increased graphitization with increasing density. Gas sensing measurements showed that moderate to high CNF densities significantly enhance sensor conductivity and ethanol sensitivity due to improved charge transport paths and increased active surface area. These results highlight the importance of CNF density optimization in designing high-performance gas sensors.

KW - Gas sensor

KW - Fiber Density

KW - Raman Spectroscopy

U2 - 10.1109/SENSORS59705.2025.11330369

DO - 10.1109/SENSORS59705.2025.11330369

M3 - Conference contribution

SN - 979-8-3315-4468-3

BT - Proceedings of the 2025 IEEE SENSORS

PB - IEEE

CY - Piscataway

T2 - 2025 IEEE SENSORS

Y2 - 19 October 2025 through 22 October 2025

ER -

Tuning Carbon Nanofiber Density for Optimized Sensing of Ethanol

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