Results 161 to 170 of about 22,469 (293)

Giant anomalous exciton-multiphoton nonlinearities in layered hybrid perovskites. [PDF]

Light Sci Appl
Xu Y, Liu Y, Yu C, Xu J, Huang W, Mo W, Xu C, Sun Z, Huang Y, Cao X, Xie Z, Lu R.   +11 more
europepmc   +1 more source

Near‐White Circularly Polarized Luminescence by Color Mixing Utilizing Surface‐Fluorophore‐Modified Cellulose Nanocrystals in Composite Films

Chemistry – A European Journal, Volume 32, Issue 36, 24 September 2026.
Robust, bio‐derived, and freestanding films based on cellulose nanocrystals (CNCs), covalently decorated with achiral fluorophores, transduce shape chirality and supramolecular helicity into near‐white circularly polarized luminescence (CPL). With composites covering the visible spectrum, near‐white, right‐handed CPL with high luminescence dissymmetry (
Asmita Shah, Timothy G. Lerch, Gourab Acharjee, Grace A. R. Rohaley, Shamima Akhter, Nicholas M. Kamuti, Ashwathanarayana Gowda, Ryan A. Williams, Elda Hegmann, Marianne E. Prévôt, Torsten Hegmann   +10 more
wiley   +1 more source

Open- and Closed-Shell Roles of Sensitizer and Annihilator in Pseudo-Single Component Mixtures for Upconversion. [PDF]

J Am Chem Soc
Richards KD, Wang W, Thielert P, Green JD, Hudson JM, Tonnelé C, Casanova D, Olivier Y, Hele TJH, Richert S, Li F, Evans EW.   +11 more
europepmc   +1 more source

Dependence of upconversion on direct luminescence decay in energy-transfer upconversion

, 2003
For several decades, energy-transfer upconversion (ETU) in rare-earth-ion doped systems [1,2] has attracted much attention, firstly, because of the fundamental interest in the physical nature of this process and, secondly, because of very practical considerations, namely the demonstration of near-infrared pumped visible light sources and, in reverse ...
Laversenne, L., Pollnau, Markus, Bigotta, S., Toncelli, A., Tonelli, M.   +4 more
openaire   +1 more source

Molecular upconversion nanoparticles for live-cell imaging

Precise molecular control has become a highly attractive feature to develop the next generation of upconversion materials for autofluorescence-free deep tissue imaging.
Fayad, Nour, Knighton, Richard, Light, Mark, Benard, Magalie, Gagliazzo, Francesco, Reisch, Andreas, Pini, Federico, Natile, Marta Maria, Charbonnière, Loïc J., Knighton, Richard C., Haye, Lucie, Hildebrandt, Niko, Soro, Lohona Kevin, Light, Mark E, Charbonnière, Loïc   +14 more
core   +1 more source

The Cyano‐Diels–Alder Reaction: From Nitrile Activation to Functional Molecular Architectures

European Journal of Organic Chemistry, Volume 29, Issue 34, 11 September 2026.
This Concept Article presents the evolution of the cyano‐Diels–Alder reaction from its early examples to its current development as a valuable synthetic tool for the preparation of N‐heterocycles, fused polycycles and functional chromophores, tracing the key breakthroughs that have transformed this underexplored transformation into a relevant platform ...
Giovanni Bottari
wiley   +1 more source

Overcoming the limitation: energy-gap tailoring of thermally coupled levels from Er³⁺ in fiber microspheres for optical thermometry over 213-823 K. [PDF]

Nanoscale Adv
Zhang X, Bao G, Hu S, Huang J, Lin C, Guo X, Yuan M, Han K.   +7 more
europepmc   +1 more source

Upconversion emission of a Er3+-doped glass microsphere under 633 nm excitation

, 2004
In this work, The TBS glass microspheres doped with Er3+ for morphology-dependent resonances of upconversion emission were designed. The glass sample components are 25TiO(2)-27BaCO(3)-8Ba(NO3)(2)-6ZnO(2)-9CaCO(3)-5H(3)BO(3)-10SiO(2)-7water glass-3Er(2)O ...
Wang, JY, Zhao, LJ, Wang, JY, Bewing Univ Technol, Coll Appl Sci, Beijing 100022, Peoples R China. 电子邮箱地址: wangjiyou@bjut.edu.cn, Ji, GR, Jin, P, Zhang, CZ   +5 more
core  

Radio‐Frequency Front‐End‐Free Hybrid Code‐Division and Space‐Division Wireless Multiplexing Using Space‐Time‐Coding Metasurface

Nanophotonics, Volume 15, Issue 17, 11 September 2026.
This work constructs a radio‐frequency front‐end‐free hybrid code‐division and space‐division‐multiplexing wireless communication system built on programmable space‐time‐coding metasurfaces. Orthogonal pseudo‐random codes reliably separate overlapped multistream signals that share identical frequency, time, and spatial resources.
Yuzhen Chen, Xiaoyi Wang, Guo‐Min Yang, Ya‐Qiu Jin   +3 more
wiley   +1 more source

Photophysical lock-in detection enables background-free upconversion emission imaging. [PDF]

Light Sci Appl
Bagheri N, Wang C, Guo D, Lakshmanan A, Zhu Q, Chen X, Ghazyani N, Zhan Q, Sotiriou GA, Liu H, Widengren J.   +10 more
europepmc   +1 more source