All‐Dielectric Nanostructures with a Thermoresponsible Dynamic Polymer Shell. (5th May 2021)

• Record Type: Journal Article
• Authors: Nikitina, Anna A.; Milichko, Valentin A.; Novikov, Alexander S.; Larin, Artem O.; Nandi, Proloy; Mirsaidov, Utkur; Andreeva, Daria V.; Rybin, Mikhail V.; Kivshar, Yuri S.; Skorb, Ekaterina V.
• Is Part Of: Angewandte Chemie. Volume 133:Number 23(2021)
• Page Start: 12847
• Page End: 12851
• Publication Date: 2021-05-05
• Subjects: all-dielectric nanophotonics -- polyelectrolyte assembly -- silicon nanoparticles -- stimuli-responsive structures; Chemistry -- Periodicals; 540
• DOI: 10.1002/ange.202101188
• Languages: English
• ISSNs: 0044-8249

Abstract

Abstract: We suggest a new strategy for creating stimuli‐responsive bio‐integrated optical nanostructures based on Mie‐resonant silicon nanoparticles covered by an ensemble of similarity negatively charged polyelectrolytes (heparin and sodium polystyrene sulfonate). The dynamic tuning of the nanostructures' optical response is due to light‐induced heating of the nanoparticles and swelling of the polyelectrolyte shell. The resulting hydrophilic/hydrophobic transitions significantly change the shell thickness and reversible shift of the scattering spectra for individual nanoparticles up to 60 nm. Our findings bring novel opportunities for the application of smart nanomaterials in nanomedicine and bio‐integrated nanophotonics. Abstract : Light‐induced tuning of the optical response of silicon nanoparticles covered by polyelectrolyte shell occurs due to light‐induced heating and concomitant swelling of the shell reversibly up to 120 C.