Publication detail

Cadmium telluride/polypyrrole nanocomposite based Love wave sensors highly sensitive to acetone at room temperature

ŠETKA, M. BAHOS, F. CHMELA, O. MATATAGUI, D. GRÁCIA, I. DRBOHLAVOVÁ, J. VALLEJOS VARGAS, S.

Original Title

Cadmium telluride/polypyrrole nanocomposite based Love wave sensors highly sensitive to acetone at room temperature

Type

journal article in Web of Science

Language

English

Original Abstract

Cadmium telluride/polypyrrole (CdTe/PPy) nanocomposites are synthesized and integrated into Love mode surface acoustic wave (L SAW) sensors, achieving high sensitivity to various volatile organic compounds including acetone, ethanol, and toluene. Chemical/physical analysis of the composites and their integration as second/guiding sensitive layer into the L SAW structure show no evidence of strong chemical interaction among the structural components based on CdTe quantum dots and PPy nanoparticles. The gas sensing tests are focus on the performance of L SAW sensors consisting of CdTe/PPy (1:10), CdTe/PPy (1:2), and non-modified PPy layers. Results reveal that the L SAW sensors containing CdTe/PPy (1:10) composite improve the sensing performances to acetone showing a sensitivity of 771 Hz/ppm, an estimated limit of detection (LOD) of 5 ppb, and low interference to ethanol and toluene, compared to the sensors with CdTe/PPy (1:2) or without CdTe modification. The high sensitivity of the L SAW sensors to acetone is connected with the adsorption of acetone at PPy via dipole-dipole interaction and the incorporation of CdTe in the guiding/sensitive L SAW layers.Cadmium telluride/polypyrrole (CdTe/PPy) nanocomposites are synthesized and integrated into Love mode surface acoustic wave (L SAW) sensors, achieving high sensitivity to various volatile organic compounds including acetone, ethanol, and toluene. Chemical/physical analysis of the composites and their integration as second/guiding sensitive layer into the L SAW structure show no evidence of strong chemical interaction among the structural components based on CdTe quantum dots and PPy nanoparticles. The gas sensing tests are focus on the performance of L SAW sensors consisting of CdTe/PPy (1:10), CdTe/PPy (1:2), and non-modified PPy layers. Results reveal that the L SAW sensors containing CdTe/PPy (1:10) composite improve the sensing performances to acetone showing a sensitivity of 771 Hz/ppm, an estimated limit of detection (LOD) of 5 ppb, and low interference to ethanol and toluene, compared to the sensors with CdTe/PPy (1:2) or without CdTe modification. The high sensitivity of the L SAW sensors to acetone is connected with the adsorption of acetone at PPy via dipole-dipole interaction and the incorporation of CdTe in the guiding/sensitive L SAW layers.

Keywords

Polypyrrole Quantum dots Composite Surface acoustic wave Gas sensors

Authors

ŠETKA, M.; BAHOS, F.; CHMELA, O.; MATATAGUI, D.; GRÁCIA, I.; DRBOHLAVOVÁ, J.; VALLEJOS VARGAS, S.

Released

15. 10. 2020

Publisher

Elsevier

ISBN

0925-4005

Periodical

Sensors and Actuators B: Chemical

Year of study

321

Number

1

State

Swiss Confederation

Pages from

1

Pages to

9

Pages count

9

URL

https://www.sciencedirect.com/science/article/pii/S0925400520309199

BibTex

@article{BUT164545,
  author="Milena {Šetka} and Fabio {Bahos} and Ondřej {Chmela} and Daniel {Matatagui} and Isabel {Grácia} and Jana {Drbohlavová} and Stella {Vallejos Vargas}",
  title="Cadmium telluride/polypyrrole nanocomposite based Love wave sensors highly sensitive to acetone at room temperature",
  journal="Sensors and Actuators B: Chemical",
  year="2020",
  volume="321",
  number="1",
  pages="1--9",
  doi="10.1016/j.snb.2020.128573",
  issn="0925-4005",
  url="https://www.sciencedirect.com/science/article/pii/S0925400520309199"
}