Colloidal Photoluminescent Refractive Index Nanosensor Using Plasmonic Effects
1
Yanka Kupala State University of Grodno, Grodno 230023, Belarus
2
B. I. Stepanov Institute of Physics, National Academy of Sciences, Minsk 220072, Belarus
3
Department of Electrical and Electronics Engineering, Department of Physics, and UNAM–Institute of Materials Science and Nanotechnology, Bilkent University, Ankara 06800, Turkey
4
LUMINOUS! Center of Excellence for Semiconductor Lighting and Displays, School of Electrical and Electronic Engineering, School of Physical and Mathematical Sciences, Nanyang Technological University, 50 Nanyang Ave 639798, Singapore, Singapore
Cite as: Dmitry V. Guzatov, Sergey V. Gaponenko, Hilmi V. Demir. Colloidal Photoluminescent Refractive Index Nanosensor Using Plasmonic Effects, nano Online. (2019). DOI: https://doi.org/10.1515/nano.0048.00093
Cite as: Dmitry V. Guzatov, Sergey V. Gaponenko, Hilmi V. Demir. Colloidal Photoluminescent Refractive Index Nanosensor Using Plasmonic Effects, Zeitschrift für Physikalische Chemie. 232, 1431 (2018). DOI: https://doi.org/10.1515/zpch-2018-1127
Abstract
Fluorescence enhancement by metal nanostructures which is sensitive to refractive index n of an ambient medium is suggested as an operation principle of a novel refractive index sensor for liquids. Calculations are made for spherical and spheroidal Ag particles, and potential feasibility of sensitivity of the order of Δn=10−4 is demonstrated. Sensors of this type can be made fully colloidal with metal bodies deposited on a substrate or comprising a metal layer covering colloidal assembly of dielectric particles to serve as a test strip as well as placed on a fiber tip end to get local probing of refractive index in the tip-enhanced refractometry mode. Colloidal core-shell semiconductor nanocrystals may become the best candidates for this type of sensors whereas molecular probes may be affected by chemical properties of tested liquids.
Keywords: Nanoparticles and Colloids; Metallic; Self-assembling Materials; Optical Materials; Simulation and Computation; colloidal nanostructures; fluorescence; plasmonics; refractive index; sensors
