Optical force aggregation of gold nanoparticles as a tool to fabrication a multifunctional sensor

0568149 - ÚPT 2023 RIV US eng C - Konferenční příspěvek (zahraniční konf.)
Bernatová, Silvie - Kizovský, Martin - Donato, M. G. - Foti, A. - Samek, Ota - Ježek, Jan - Maragò, O. M. - Zemánek, Pavel - Gucciardi, P. G.
Optical force aggregation of gold nanoparticles as a tool to fabrication a multifunctional sensor.
22nd Polish-Slovak-Czech Optical Conference on Wave and Quantum Aspects of Contemporary Optics. Bellingham: SPIE, 2022 - (Masajada, J.; Urbańczyk, W.), č. článku 125020U. Proceedings of SPIE, 12502. ISBN 978-1-5106-6112-7. ISSN 0277-786X. E-ISSN 1996-756X.
[Polish-Slovak-Czech Optical Conference on Wave and Quantum Aspects of Contemporary Optics /22./. Wojanów (PL), 05.09.2022-09.09.2022]
Grant ostatní: AV ČR(CZ) MSM100652101
Program: Program na podporu mezinárodní spolupráce začínajících výzkumných pracovníků
Institucionální podpora: RVO:68081731
Klíčová slova: nanoplastics * optical printing * optical pushing * sensor * surface enhanced Raman spectroscopy
Obor OECD: Optics (including laser optics and quantum optics)
https://www.spiedigitallibrary.org/conference-proceedings-of-spie/12502/2664176/Optical-force-aggregation-of-gold-nanoparticles-as-a-tool-to/10.1117/12.2664176.short

Optical nano-printing provides a versatile platform to print various nanoparticles into arbitrary configurations. Optical printing, the use of light to direct the formation of a desired structure, has been of significant interest in the last two decades. For particles much smaller than the laser wavelength, optical forces can be well described in the dipole approximation. For a focused laser beam, two main optical force components are identified: the gradient force, which attracts particles toward the high-intensity focal spot, and the scattering force, which tends to push particles along the beam propagation direction. When the wavelength light is close to the particle localized surface plasmons resonance, a scattering force is dominant and can be used to efficiently push nanoparticles along the beam optical axis onto a substrate. In this context, optical forces can be applied to optically print nanoparticles into patterns aggregated on surfaces such as glass. Here, we report on use optical nanoprinting of plasmonic nanoparticles to create an active aggregate in a solution containing dyes or nanoplastics. The active aggregate, produced by optical forces, serves as a sensitive sensor which is used to detect dyes in concentrations below the limit of detection for Raman spectroscopy and/or to detection of plastic nanoparticles.
Trvalý link: https://hdl.handle.net/11104/0339490