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Photon Upconversion in Aqueous Nanodroplets.
Sanders, Samuel N; Gangishetty, Mahesh K; Sfeir, Matthew Y; Congreve, Daniel N.
  • Sanders SN; Rowland Institute at Harvard , Cambridge , Massachusetts 02142 , United States.
  • Gangishetty MK; Rowland Institute at Harvard , Cambridge , Massachusetts 02142 , United States.
  • Sfeir MY; Photonics Initiative, Advanced Science Research Center , City University of New York , New York , New York 10031 , United States.
  • Congreve DN; Department of Physics, Graduate Center , City University of New York , New York , New York 10016 , United States.
J Am Chem Soc ; 141(23): 9180-9184, 2019 06 12.
Article en En | MEDLINE | ID: mdl-31184152
Triplet fusion upconversion, the conversion of two low-energy photons into one higher-energy photon via excitonic intermediates, has the potential to revolutionize fields as diverse as biological imaging, photovoltaics, and optogenetics. However, important hurdles to widespread application still exist; for example, the vast majority of demonstrations are in nonpolar solvents, limiting applications. Furthermore, the necessary high concentrations of dyes limit optical penetration depth. Efforts toward aqueous solutions utilizing micelles and other nanoencapsulants have been limited by poor efficiencies or scatter from the nanoparticles. Here, we demonstrate a facile micellular fabrication method that drives a high boiling point solvent into the core of a block copolymer micelle, greatly reducing molecular aggregation. We show that this simple preparation is scalable and provides benefits across five different colors of photon upconversion. We expect this simple, user-friendly, and high-performance system to aid a multitude of photon upconversion applications, in particular, for optogenetics, photodynamic therapy, and photochemistry.
Asunto(s)

Texto completo: 1 Banco de datos: MEDLINE Asunto principal: Agua / Fotones / Nanoestructuras / Procesos Fotoquímicos Idioma: En Año: 2019 Tipo del documento: Article

Texto completo: 1 Banco de datos: MEDLINE Asunto principal: Agua / Fotones / Nanoestructuras / Procesos Fotoquímicos Idioma: En Año: 2019 Tipo del documento: Article