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Volume 25
Issue 22
10.3390/s25227069
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This is an early access version, the complete PDF, HTML, and XML versions will be available soon.
Article

Acousto-Electronic Sensor Based on Langmuir-Blodgett Films of Tetra-Tert-Butylphthalocyaninate Zinc for Chemical Vapor Detection

by
Ilya Gorbachev
1,
Andrey Smirnov
1,
Vladimir Kolesov
1,
Alexey Yagodin
2,
Alexander Martynov
2,
Yulia Gorbunova
2,3 and
Iren Kuznetsova
1,*
1
Kotelnikov Institute of Radio Engineering and Electronics of RAS, Moscow 125009, Russia
2
Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences, 31-4, Leninsky Prospect, Moscow 119071, Russia
3
Kurnakov Institute of General and Inorganic Chemistry, Russain Academy of Science, 31-4, Leninsky Prospect, Moscow 119991, Russia
*
Author to whom correspondence should be addressed.
Sensors 2025, 25(22), 7069; https://doi.org/10.3390/s25227069 (registering DOI)
Submission received: 15 October 2025 / Revised: 7 November 2025 / Accepted: 17 November 2025 / Published: 19 November 2025
(This article belongs to the Section Electronic Sensors)
Versions Notes

Abstract

In this work, the sensor properties of multilayered Langmuir-Blodgett (LB) films of tetra-tert-butylphthalocyaninate zinc (tBuZnPc) were studied using an acoustoelectronic method. The morphology and optical properties of the fabricated films were characterized by atomic force microscopy and ultraviolet-visible spectroscopy, respectively. The LB films were deposited on surface acoustic wave (SAW) delay lines, and their gas-sensing properties were investigated. The films demonstrated high selectivity towards chloroform vapor compared to acetone, methanol, ethanol, and isopropanol. The highest selectivity was observed for the five-layer film, which can be attributed to the specific interaction of chloroform molecules with the hydrophobic cavities formed by the tert-butyl groups. Increasing the film thickness to 41 layers enhanced the absolute response to chloroform to 370 ppm; however, the selectivity decreased due to increased nonspecific adsorption. The results demonstrate the potential of using tBuZnPc LB films as sensitive coatings for the selective detection of chloroform in environmental and industrial monitoring applications.
Keywords: acousto-electronic sensor; surface acoustic waves; Langmuir-Blodgett films; tetra-tert-butylphthalocyaninatozinc; chloroform; selective detection; film morphology acousto-electronic sensor; surface acoustic waves; Langmuir-Blodgett films; tetra-tert-butylphthalocyaninatozinc; chloroform; selective detection; film morphology

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MDPI and ACS Style

Gorbachev, I.; Smirnov, A.; Kolesov, V.; Yagodin, A.; Martynov, A.; Gorbunova, Y.; Kuznetsova, I. Acousto-Electronic Sensor Based on Langmuir-Blodgett Films of Tetra-Tert-Butylphthalocyaninate Zinc for Chemical Vapor Detection. Sensors 2025, 25, 7069. https://doi.org/10.3390/s25227069

AMA Style

Gorbachev I, Smirnov A, Kolesov V, Yagodin A, Martynov A, Gorbunova Y, Kuznetsova I. Acousto-Electronic Sensor Based on Langmuir-Blodgett Films of Tetra-Tert-Butylphthalocyaninate Zinc for Chemical Vapor Detection. Sensors. 2025; 25(22):7069. https://doi.org/10.3390/s25227069

Chicago/Turabian Style

Gorbachev, Ilya, Andrey Smirnov, Vladimir Kolesov, Alexey Yagodin, Alexander Martynov, Yulia Gorbunova, and Iren Kuznetsova. 2025. "Acousto-Electronic Sensor Based on Langmuir-Blodgett Films of Tetra-Tert-Butylphthalocyaninate Zinc for Chemical Vapor Detection" Sensors 25, no. 22: 7069. https://doi.org/10.3390/s25227069

APA Style

Gorbachev, I., Smirnov, A., Kolesov, V., Yagodin, A., Martynov, A., Gorbunova, Y., & Kuznetsova, I. (2025). Acousto-Electronic Sensor Based on Langmuir-Blodgett Films of Tetra-Tert-Butylphthalocyaninate Zinc for Chemical Vapor Detection. Sensors, 25(22), 7069. https://doi.org/10.3390/s25227069

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