Results 191 to 200 of about 9,394 (232)
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Overcoming thermal quenching in upconversion nanoparticles
Nanoscale, 2021Recent efforts for alleviating energy dissipation and enhancement of energy collection are reviewed to combat thermal quenching in UCNPs.
Yanze Wang, Bing Chen, Feng Wang
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Lanthanide-doped upconversion nanoparticles
Physics Today, 2015A new class of nanomaterials that convert near-IR radiation into tunable visible light has important implications for many fields of science and technology.
BETTINELLI, Marco Giovanni +2 more
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FRET with Upconversion Nanoparticles
Accounts of Chemical ResearchConspectusUpconversion nanoparticles (UCNPs) have become one of the most frequently used nanomaterials for optical biosensing and imaging. UCNPs unique properties include high photostability, low toxicity, large anti-Stokes shifts, and negligible sample background fluorescence under near-infrared (NIR) excitation.
Eduard Madirov, Niko Hildebrandt
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Upconversion luminescence behavior of single nanoparticles
Nanoscale, 2015The angle of this review is novel because it surveys the characterization methods, photophysical phenomena, and applications of single upconversion nanoparticles.
Jiajia, Zhou +3 more
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Combating Concentration Quenching in Upconversion Nanoparticles
Accounts of Chemical Research, 2019Lanthanide-doped upconversion nanoparticles (UCNPs) are a special class of luminescent nanomaterials that convert multiwavelength near-infrared (NIR) excitation into tunable emissions spanning the deep ultraviolet (UV) to NIR regions. In addition to large anti-Stokes shift, UCNPs also feature a sharp emission bandwidth, long excited-state lifetime, as ...
Bing Chen, Feng Wang
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Upconversion luminescence from CdSe nanoparticles
The Journal of Chemical Physics, 2005Efficient upconversion luminescence has been observed from CdSe nanoparticles ranging in size from 2.5 to 6 nm. The upconversion luminescence exhibits a near-quadratic laser power dependence. Emissions from both excitons and trap states are observed in the upconversion and photoluminescence spectra, and in the upconversion luminescence the emission ...
Wei, Chen +2 more
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PET imaging with multimodal upconversion nanoparticles
Dalton Transactions, 2014A series of new upconversion nanoparticles have been functionalised with tumour-targeting molecules and metal chelates, prepared following standard peptidic and thiol chemistry. The targeting strategy has been delivered via the αvβ3 integrin, which is a heterodimeric cell surface receptor that is up-regulated in a variety of cancers, such as melanoma ...
Juan, Gallo +6 more
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Photon upconversion in core–shell nanoparticles
Chemical Society Reviews, 2015This tutorial review highlights recent advances in the development of upconversion core–shell nanoparticles to cater for biological and energy applications.
Xian, Chen +3 more
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Upconversion Nanoparticles for Bioimaging
2016Rare earth lanthanide-doped upconversion nanoparticles (UCNPs), which can nonlinearly convert long wavelength near-infrared (NIR) light illumination into multiplex emissions, have been widely used in biomedical applications for in vitro and in vivo biolabeling and optical data storage based on their controllable multicolor emission properties. Compared
Xiangzhao Ai, Junxin Aw, Bengang Xing
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Spectroscopic properties and upconversion in Pr3+:YF3 nanoparticles
Physical Chemistry Chemical Physics, 2011The synthesis and spectroscopic investigation of Pr(3+):YF(3) nanoparticles with nominal concentration between 0.05% and 5 at% Pr(3+) are reported. Pr(3+) emission in the visible range of the spectrum is investigated at room temperature and at 10 K as well as time resolved spectroscopy as a function of Pr(3+) concentration.
F Pellé +6 more
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