The use of advanced spectral imaging to reveal nanoparticle identity in biological samples

Abstract

Metal nanoparticles (NPs) have been used in drug delivery therapy, medical diagnostic strategy, and the current Covid-19 vaccine carriers. Many microscope-based imaging systems have been introduced to facilitate detection and...

Broadly tunable filter based on a graphene MEMS-photonic crystal composite structure and its application in single-pixel full-color displays

“…Tunable narrowband optical filters refer to optical devices that allow only a very narrow range of light wavelengths to transmit within a specified spectral range, and the center wavelength of the transmitted light can be tuned. These optical devices have significant applications in fields such as optical communication, 1,2 optical sensing, 3,4 spectral and chemical analysis, [5][6][7][8][9] and wearable smart devices. 10,11 Currently, tunable narrowband optical filters mainly include liquid crystal tunable filters, [12][13][14] acousto-optic tunable filters, 15,16 tunable filters based on volume Bragg gratings, 17,18 and Fabry Pe ´rot (FP) tunable filters.…”