Highly Sensitive Room-Temperature Ammonia Sensors Based on Single-Wall Carbon Nanotubes Modified by PEDOT

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61388955%3A_____%2F22%3A00555107" target="_blank" >RIV/61388955:_____/22:00555107 - isvavai.cz</a>

Alternative codes found

RIV/49777513:23220/22:43964879

Result on the web

<a href="https://ieeexplore.ieee.org/document/9678311" target="_blank" >https://ieeexplore.ieee.org/document/9678311</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1109/JSEN.2022.3142405" target="_blank" >10.1109/JSEN.2022.3142405</a>

Result language

angličtina

Original language name

Highly Sensitive Room-Temperature Ammonia Sensors Based on Single-Wall Carbon Nanotubes Modified by PEDOT

Original language description

An ammonia gas sensor material based on sulf- onic functionalized single-wall carbon nanotubes modified by poly(3,4-ethylenedioxythiophene), namely, PEDOT/SWCNT-SO3H, was prepared via in situ polymerization. A thin active layer of PEDOT/SWCNT-SO3H was deposited on a polyimide substrate with interdigital electrodes by air-brush spray coating. The morphology of the prepared material was studied by scanning electron microscopy, and the presence of PEDOT in the structure of SWCNT-SO3H was examined with Raman spectroscopy. The obtained results showed that PEDOT was successfully bound to SWCNT-SO3H and that this modification significantly improved the NH3 sensing performance of the sensor. The sensor exhibited a strong response to ammonia (102% at 50 ppm), minimal drift in the electrical resistance during cyclic exposure, and good spontaneous desorption, all at room temperature. In the range from 20 ppm to 100 ppm ammonia, the calibration curve is considered linear, with a sensitivity of a 0.7% resistance change per 1 ppm ammonia. Furthermore, the sensor shows the ability to detect ammonia at sub-ppm concentration, and the response is 4.4% at 300 ppb. With regard to the material structure, the sensing mechanisms of both materials, i.e., PEDOT/SWCNT-SO3H and SWCNT-SO3H, are discussed in the article.

Czech name

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Czech description

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Type

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

CEP classification

—

OECD FORD branch

10403 - Physical chemistry

Project

Result was created during the realization of more than one project. More information in the Projects tab.

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2022

Confidentiality

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

Name of the periodical

IEEE Sensors Journal

ISSN

1530-437X

e-ISSN

1558-1748

Volume of the periodical

22

Issue of the periodical within the volume

4

Country of publishing house

US - UNITED STATES

Number of pages

9

Pages from-to

3024-3032

UT code for WoS article

000754264700015

EID of the result in the Scopus database

2-s2.0-85123368389