Ultrathin Double-Shell Capsules for High Performance Photon Upconversion

Ji-Hwan Kang; Sang Seok Lee; Josefa Guerrero; Alberto Fernandez-Nieves; Shin-Hyun Kim; Elsa Reichmanis

doi:10.1002/adma.201606830

Ultrathin Double-Shell Capsules for High Performance Photon Upconversion

Adv Mater. 2017 Jun;29(21). doi: 10.1002/adma.201606830. Epub 2017 Mar 21.

Authors

Ji-Hwan Kang¹, Sang Seok Lee², Josefa Guerrero³, Alberto Fernandez-Nieves⁴, Shin-Hyun Kim², Elsa Reichmanis^{1

5}

Affiliations

¹ School of Chemical and Biomolecular Engineering, Georgia Institute of Technology, Atlanta, GA, 30332, USA.
² Department of Chemical and Biomolecular Engineering, KAIST, Daejeon, 305-701, South Korea.
³ Department of Chemistry and Physics, Augusta University, Augusta, GA, 30912, USA.
⁴ School of Physics, Georgia Institute of Technology, Atlanta, GA, 30332, USA.
⁵ School of Chemistry and Biochemistry School of Materials Science Engineering, Georgia Institute of Technology, Atlanta, 30332, USA.

PMID: 28323354
DOI: 10.1002/adma.201606830

Abstract

Triplet-fusion-based photon upconversion capsules with ultrathin double shells are developed through a single dripping instability in a microfluidic flow-focusing device. An inner separation layer allows use of a brominated hydrocarbon oil-based fluidic core, demonstrating significantly enhanced upconversion quantum yield. Furthermore, a perfluorinated photocurable monomer serves as a transparent shell phase with remote motion control through magnetic nanoparticle incorporation.

Keywords: anti-Stokes shift; emulsions; microfluidics; triplet-triplet annihilation; upconversion.