Bioinspired Carbonized Polymer Microspheres for Full-Color Whispering Gallery Mode Emission for White Light Emission, Unclonable Anticounterfeiting, and Chemical Sensing Applications

Barman, BK and Hernández-Pinilla, D and Dao, TD and Deguchi, K and Ohki, S and Hashi, K and Goto, A and Miyazaki, T and Nanda, KK and Nagao, T (2023) Bioinspired Carbonized Polymer Microspheres for Full-Color Whispering Gallery Mode Emission for White Light Emission, Unclonable Anticounterfeiting, and Chemical Sensing Applications. In: ACS Applied Materials and Interfaces .

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Abstract

Light-element-based fluorescent materials, colloidal graphene quantum dots, and carbon dots (CDs) have sparked an immense amount of scientific interest in the past decade. However, a significant challenge in practical applications has emerged concerning the development of solid-state fluorescence (SSF) materials. This study addresses this knowledge gap by exploring the unexplored photonic facets of C-based solid-state microphotonic emitters. The proposed synthesis approach focuses on carbonized polymer microspheres (CPMs) instead of conventional nanodots. These microspheres exhibit remarkable SSF spanning the entire visible spectrum from blue to red. The highly spherical shape of CPMs imparts built-in photonic properties in addition to its intrinsic CD-based attributes. Leveraging their excitation-dependent photoluminescence property, these microspheres exhibit amplified spontaneous emission, assisted by the whispering gallery mode resonance across the visible spectral region. Remarkably, unlike conventional semiconductor quantum dots or dye-doped microresonators, this single microstructure showcases adaptable resonant emission without structural/chemical modifications. This distinctive attribute enables a plethora of applications, including microcavity-assisted energy transfer for white light emission, highly sensitive chemical sensing, and secure encrypted anticounterfeiting measures. This interdisciplinary approach, integrating photonics and chemistry, provides a robust solution for light-element-based SSF with inherent photonic functionality and wide-ranging applications. © 2024 American Chemical Society.

Item Type:	Journal Article
Publication:	ACS Applied Materials and Interfaces
Publisher:	American Chemical Society
Additional Information:	The copyright for this article belongs to American Chemical Society.
Keywords:	Chemical detection; Chemical sensors; Fluorescence; Microspheres; Nanocrystals; Optical resonators; Semiconductor quantum dots; Sols; Whispering gallery modes, Anti-counterfeiting; Carbon dots; Carbonized polymer microsphere; Element-based; Energy-transfer; Full color; Light elements; Polymer microspheres; Solid-state fluorescence; White light emission, Energy transfer, carbon; dye; graphene; microsphere; polymer; quantum dot, article; chemical modification; color; controlled study; drug analysis; energy transfer; excitation; fluorescence; nonhuman; pharmaceutics; photoluminescence; photonics; semiconductor; solid state; synthesis; white light
Department/Centre:	Division of Chemical Sciences > Materials Research Centre
Date Deposited:	22 May 2024 12:13
Last Modified:	22 May 2024 12:13
URI:	https://eprints.iisc.ac.in/id/eprint/85073

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