Laser engineering of microbial systems: a new tool for microbiology
Minaev N.V. 1, Zhigarkov V.S.1, Cheptsov V.S.1,2, Yusupov V.I.1
1Institute Photon Technologies Kurchatov Complex of Crystallography and Photonics NRC "Kurchatov Institute"
2Department of Soil Science, Lomonosov Moscow State University
Email: minaevn@gmail.com, vzhigarkov@gmail.com, cheptcov.vladimir@gmail.com, iouss@yandex.ru

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One of the new areas of laser bioprinting is laser engineering of microbial systems (LEMS). This technology involves controlled transfer of gel microdroplets containing microorganisms from a donor substrate to acceptor media using a nanosecond laser pulse. During such transfer, living systems are affected by various physical factors: radiation, shock waves, temperature surges. The work carried out a study of the effect on Escherichia coli cells of nanoparticles that are formed during the destruction of a thin gold absorbent coating of the donor plate. It has been shown that the sizes of these nanoparticles, their concentration in the colloid, and the zeta-potential depend significantly on the laser pulse energy. It has been established that Au nanoparticles have a certain effect on the kinetics of microbial growth. A systematization of the main physical factors influencing microorganisms during their laser-induced spatial transfer has been carried out, and the most important scientific results from a practical point of view obtained using promising LEMS technology have been analyzed. Keywords: laser bioprinting, laser engineering of microbial systems, LEMS, direct laser-induced transfer, microbiology, impact factors.
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