Speaker
Description
The global problem associated with the growth of terrorism has significantly worsened in the conditions of war in Ukraine due to the large-scale contamination of soil and water resources with explosives and explosion products. This makes the development of a sensitive, fast, cheap, portable and mass-producible sensor for the detection of explosives an urgent issue.
A number of attempts have been made to solve the problem of developing such a sensor using various recognition elements and sensor principles, including optical, electrochemical, surface-acoustic and immunological methods. Also, plasmonic enhancement is a well-known method of improving the sensitivity of optical sensors [1].
We propose to implement the optical method of fluorescent detection of explosives in a portable version with sensitive sensor elements in the form of composite materials with plasmonic nanostructures. Previous experience in the development of nanochip technology with a molecularly imprinted polymer coating for the detection of chemical analogs and taggants of explosives based on localized surface plasmon resonance [2, 3] and a highly selective aflatoxin sensor based on plasmon-enhanced fluorescence [4] will be used.
Therefore, the development of a portable sensor based on plasmon-enhanced fluorescence using molecularly imprinted polymers to ensure the selective detection of explosive nitro compounds and/or their chemical analogues in the gas and liquid phase with a sensitivity that allows the registration of picomoles (nanograms) or less of the specified substances with a response time of several minutes looks promising.
This work was supported by the National Research Foundation of Ukraine, project 2023.04/0057.
- Li, M., Cushing, S. K., & Wu, N. (2015). Plasmon-enhanced optical sensors: a review. Analyst, 140(2), 386-406.
- V.I. Chegel, A.M. Lopatynskyi, V.K. Lytvyn, P.V. Demydov, J.P. Martínez-Pastor, R. Abargues, E.A. Gadea, S.A. Piletsky. Localized surface plasmon resonance nanochips with molecularly imprinted polymer coating for explosives sensing // Semiconductor Physics, Quantum Electronics & Optoelectronics. – Vol. 23. – 2020. – pp. 431-436.
- E. Aznar-Gadea, P. J. Rodríguez-Canto, J. P. Martínez-Pastor, A. Lopatynskyi, V. Chegel, R. Abargues. Molecularly imprinted silver nanocomposites for explosive taggant sensing // ACS Applied Polymer Materials. – Vol. 3. – 2021. – pp. 2960-2970.
- T. Sergeyeva, D. Yarynka, V. Lytvyn, P. Demydov, A. Lopatynskyi, Y. Stepanenko, O. Brovko, A. Pinchuk, V. Chegel. Highly-selective and sensitive plasmon-enhanced fluorescence sensor of aflatoxins // Analyst. – Vol. 147. – 2022. – pp. 1135-1143.
| Type of presence | Presence at Taras Shevchenko National University |
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