0600806 - FZÚ 2025 RIV US eng J - Článek v odborném periodiku
Morozov, Y.M. - Gisbert Quilis, N. - Fossati, Stefan - De Laporte, L. - Gusenbauer, C. - Weber, A. - Toca-Herrera, J.L. - Wiesner, F. - Jonas, U. - Dostálek, Jakub
Plasmon-enhanced multiphoton polymer crosslinking for selective modification of plasmonic hotspots.
Journal of Physical Chemistry C. Roč. 128, č. 43 (2024), s. 18641-18650. ISSN 1932-7447. E-ISSN 1932-7455
Grant CEP: GA MŠMT(CZ) EH22_008/0004596; GA ČR(CZ) GC22-30456J
GRANT EU: European Commission(XE) 101046217 - VerSiLiB
Institucionální podpora: RVO:68378271
Klíčová slova: hydrogels * plasmonics * polymers * surface plasmon resonance * metal nanoparticles
Obor OECD: Optics (including laser optics and quantum optics)
Impakt faktor: 3.3, rok: 2023 ; AIS: 0.744, rok: 2023
Způsob publikování: Open access
DOI: https://doi.org/10.1021/acs.jpcc.4c05936

A novel approach to selectively modify narrow subareas of metallic nanostructures adjacent to plasmonic hotspots, where strong electromagnetic field amplification occurs upon localized surface plasmon (LSP) excitation, is reported. In contrast to surface plasmon-triggered polymerization, it relies on plasmonically enhanced multiphoton crosslinking MPC) of polymer chains carrying photoactive moieties. When they are contacted with metallic nanostructures and irradiated with a femtosecond near-infrared beam resonantly coupled with LSPs, the enhanced field intensity locally exceeds the threshold and initiates MPC only at plasmonic hotspots. This concept is demonstrated by using gold nanoparticle arrays coated with two specifically designed polymers. Local MPC of a poly(N,N-dimethylacrylamide)-based copolymer with an anthraquinone crosslinker is shown via atomic force microscopy. Additionally, MPC is tested with a thermoresponsive poly(N-isopropylacrylamide)-based terpolymer. The reversible thermally induced collapse and swelling of the MPC-formed hydrogel at specific nanoparticle locations are confirmed by polarization-resolved localized surface plasmon resonance (LSPR) spectroscopy. These hybrid metallic/hydrogel materials can be further postmodified, offering attractive characteristics for future spectroscopic/bioanalytical applications.
Trvalý link: https://hdl.handle.net/11104/0359070
Vědecká data: OSF