Results 51 to 60 of about 22,469 (293)
DNA-mediated excitonic upconversion FRET switching
New Journal of Physics, 2015 Excitonics is a rapidly expanding field of nanophotonics in which the harvesting of photons, ensuing creation and transport of excitons via Förster resonant energy transfer (FRET), and subsequent charge separation or photon emission has led to the ...
Donald L Kellis +7 more
doaj +1 more source
Advanced Materials, EarlyView.Specific ortho‐halogenation transforms crystalline TADF emitters into efficient organic scintillators. Fluorine reduces the effective singlet–triplet separation, while chlorine combines near‐degenerate excited states with vibrational modulation of spin–orbit coupling.
Illia E. Serdiuk +8 more
wiley +1 more source
Uniaxial Strain Tuning of Upconversion Photoluminescence in Monolayer WSe2
Advanced Photonics ResearchStrain engineering is one of the leading mechanical ways to tune the optical properties of monolayer transition metal dichalcogenides among different techniques.
Shrawan Roy, Xiaodong Yang, Jie Gao
doaj +1 more source
Photon upconversion with directed emission [PDF]
Nature Communications, 2016 AbstractPhoton upconversion has the potential to increase the efficiency of single bandgap solar cells beyond the Shockley Queisser limit. Efficient light management is an important point in this context. Here we demonstrate that the direction of upconverted emission can be controlled in a reversible way, by embedding anthracene derivatives together ...
K. Börjesson +3 more
openaire +3 more sources
Advanced Materials, EarlyView.Membrane‐bound multimodal transducers enable longitudinal ultrasound‐guided photoacoustic monitoring and in situ thermal control of CAR T cells in heterogeneous solid tumors. Imaging correlates T cell trafficking with tumor response, distinguishing responders from nonresponders.
Myeongsoo Kim +14 more
wiley +1 more source
NIR-II Upconversion Photoluminescence of Er3+ Doped LiYF4 and NaY(Gd)F4 Core-Shell Nanoparticles
Frontiers in Chemistry, 2021 The availability of colloidal nano-materials with high efficiency, stability, and non-toxicity in the near infrared-II range is beneficial for biological diagnosis and therapy.
Qilong Feng +4 more
doaj +1 more source
Advanced Materials, EarlyView.A plasmonic–photothermal–photocatalytic hybrid comprising Cu(II)‐grafted TiO2, yolk–shell Au@SiO2, and reduced graphene oxide sheets (CuT/AuSi‐GS) harvests full‐spectrum white light‐emitting diode (LED) light via complementary photocatalytic oxidation, localized surface‐plasmon‐resonance‐induced electric‐field enhancement, and photothermal acceleration.
Minhyung Lee +10 more
wiley +1 more source
Upconversion Nanomaterials: Synthesis, Mechanism, and Applications in Sensing
Sensors, 2012 Upconversion is an optical process that involves the conversion of lower-energy photons into higher-energy photons. It has been extensively studied since mid-1960s and widely applied in optical devices. Over the past decade, high-quality rare earth-doped
Julia Xiaojun Zhao, Jiao Chen
doaj +1 more source
Light-Emitting Diode Excitation for Upconversion Microscopy: A Quantitative Assessment
, 2020 Lanthanide-based upconversion nanoparticles (UCNPs) generally require high power laser excitation. Here, we report wide-field upconversion microscopy at single-nanoparticle sensitivity using incoherent excitation of a 970 nm light-emitting diode (LED ...
Zheng, Xianlin +6 more
core +1 more source
Oxygen-Enhanced Upconversion of near Infrared Light from Below the Silicon Band Gap [PDF]
, 2019 Here we demonstrate an upconversion composition using semiconductor nanocrystal sensitizers that employs molecular triplet states below the singlet oxygen energy.
Timothy, Schmidt +8 more
core +2 more sources