Highly sensitive gas and ethanol vapor sensors based on carbon heterostructures for room temperature detection

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378271%3A_____%2F25%3A00617874" target="_blank" >RIV/68378271:_____/25:00617874 - isvavai.cz</a>

Alternative codes found

RIV/68407700:21230/25:00381831

Result on the web

<a href="https://hdl.handle.net/11104/0364728" target="_blank" >https://hdl.handle.net/11104/0364728</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1021/acsami.4c21591" target="_blank" >10.1021/acsami.4c21591</a>

Result language

angličtina

Original language name

Highly sensitive gas and ethanol vapor sensors based on carbon heterostructures for room temperature detection

Original language description

Graphene oxides (GOs) and hydrogen-terminated nanocrystalline diamonds (H-NCD) have attracted considerable attention due to their unique electronic structure and extraordinary physical and chemical properties in various applications, including gas sensing. Currently, there is a significant focus on air quality and the presence of pollutants (NH3, NO2, etc.), as well as volatile organic compounds (VOC) such as ethanol vapor from industry. This study examines the synthesis of GO, reduced graphene oxide (rGO), thiol-functionalized graphene oxide (SH-GO), and H-NCD thin films and their combination in heterostructures. The materials were analyzed for their ability to detect NO2, NH3, and ethanol vapor at room temperature (22 °C). Among the tested materials, the SH-GO/H-NCD heterostructure exhibited the highest sensitivity, with approximately 630% for ethanol vapor, 41% for NH3 and −19% for NO2. The SH-GO/H-NCD heterostructure also demonstrated reasonable response (272 s) and recovery (34 s) times. Cross-selectivity measurements revealed that the heterostructure’s response to ethanol vapor at 100 ppm remained dominant and was minimally affected by the presence of NH3 (100 ppm) or CO2 (100 ppm). The response variations were −1.3% for NO2 and 2.4% for NH3, respectively. These findings suggest that this heterostructure has the potential to be used as an active layer in low-temperature gas sensors. Furthermore, this research proposes a primary mechanism that explains the enhanced sensor response of the heterostructure compared with bare GOs and H-NCD layers.

Czech name

—

Czech description

—

Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

20501 - Materials engineering

Project

<a href="/en/project/EH22_008%2F0004596" target="_blank" >EH22_008/0004596: Sensors and Detectors for Future Information Society</a><br>

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2025

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

ACS Applied Materials and Interfaces

ISSN

1944-8244

e-ISSN

1944-8252

Volume of the periodical

17

Issue of the periodical within the volume

9

Country of publishing house

US - UNITED STATES

Number of pages

13

Pages from-to

14703-14715

UT code for WoS article

001428491200001

EID of the result in the Scopus database

2-s2.0-86000380258