Abstract

Semiconductor Physics, Quantum Electronics & Optoelectronics, 28 (1), P. 109-120 (2024).
DOI: https://doi.org/10.15407/spqeo28.01.109

Enhancement of sensory properties of chemoresistive conductive nanocomposites of carbon nanotubes and polypyrrole by functionalized calixarenes

A.A. Pud^1,*, Yu.V. Noskov¹, N.A. Ogurtsov¹, O.L. Kukla², O.S. Kruglyak¹, A.V. Mamykin², S.O. Cherenok³, S.G. Vyshnevskyy³, V.I. Kalchenko³

¹V. Kukhar Institute of Bioorganic Chemistry and Petrochemistry, NAS of Ukraine
50 Kharkivske Highway, 02160 Kyiv, Ukraine
²V. Lashkaryov Institute of Semiconductor Physics, NAS of Ukraine
41 Nauky Avenue, 03028 Kyiv, Ukraine
³Institute of Organic Chemistry, NAS of Ukraine
1 Academician Kukhar Street, 02660 Kyiv, Ukraine
^*Corresponding author e-mail: alexander.pud@gmail.com

Abstract. This work presents for the first time the modification and enhancement of sensory properties of a chemoresistive conductive core-shell nanocomposite of multi-walled carbon nanotubes (MWCNTs) and polypyrrole (PPy) doped by p-toluenesulfonate anions (TS) (MWCNT/PPy-TS) under long ultrasonic treatment in joint dispersions and, hence, under physico-chemical interactions with functionalized calixarenes (CA), namely calix[4]arene methylene-bis-phosphonic acid octasodium salt (CPA) and calix[4]arene sulfonic acid (CSA). The interactions are confirmed by a detailed analysis of FTIR spectra of a parent binary MWCNT/PPy-TS nanocomposite and its counterpart ternary MWCNT/PPy-TS/CA nanocomposites as well as by sensor measurements. The results of the latter show a strong enhancement of the sensitivity of the MWCNT/PPy-TS to isopropanol, acetone and ammonia vapors due to CSA and CPA additives, which, however, depends on the nature of functional groups of these CA.

Keywords: sensor nanocomposites, carbon nanotubes, polypyrrole, calix[4]arenes, interactions, sensitivity enhancement.

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