Results 161 to 170 of about 3,807 (195)

Manipulating upconversion luminescence intensity in a single crystal particle with a waveguide structure

Physical Chemistry Chemical Physics, 2022
A high UCL efficiency of a single β-NaYF4:Yb3+,Er3+ MT was obtained by modulating the angle between the wedge-shaped end plane of the MT and the microscope slide.
Qingyan Han, Bochao Zhao, Wei Gao, Yunxiang Li, Zeyu Sun, Chen Wang, Ye Chen, Yongkai Wang, Xuewen Yan, Jun Dong   +9 more
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Enhanced upconversion via plasmonic near-field effects: role of the particle shape [PDF]

Journal of Optics, 2019
The large energy-density enhancements, associated with the near-field of plasmonic metal nanoparticles (MNPs), can potentially be utilized to increase the efficiency of nonlinear processes such as upconversion (UC). A drawback of employing metallic structures for UC applications is luminescence quenching, i.e.
Emil H Eriksen, Søren P Madsen, Brian Julsgaard, Clarissa L M Hofmann, Jan Christoph Goldschmidt, Peter Balling   +5 more
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Polarization modulated upconversion luminescence: single particle vs. few-particle aggregates

Nanoscale, 2015
Luminescence from crystals is often anisotropic and it leads to the polarization behavior of luminescence from single crystalline particles, as exemplified here with the upconversion luminescence from a single NaYF4 nanodisk. Nanodisk aggregates exhibit polarization dependent luminescence with different polarization degrees, which depends on the ...
Ping, Chen, Min, Song, E, Wu, Botao, Wu, Jiajia, Zhou, Heping, Zeng, Xiaofeng, Liu, Jianrong, Qiu   +7 more
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Triplet Fusion Upconversion for Photocuring 3D‐Printed Particle‐Reinforced Composite Networks

Advanced Materials, 2023
AbstractHigh energy photons (λ < 400 nm) are frequently used to initiate free radical polymerizations to form polymer networks, but are only effective for transparent objects. This phenomenon poses a major challenge to additive manufacturing of particle‐reinforced composite networks since deep light penetration of short‐wavelength photons limits the
Jitkanya Wong, Shixuan Wei, Rinat Meir, Naroa Sadaba, Nathan A. Ballinger, Elizabeth K. Harmon, Xin Gao, Gokce Altin‐Yavuzarslan, Lilo D. Pozzo, Luis M. Campos, Alshakim Nelson   +10 more
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Revisiting the optimized doping ratio in core/shell nanostructured upconversion particles

Nanoscale, 2017
The development of rare-earth doped upconversion nanoparticles (RE-UCNPs) in various applications is fuelling the demand for nanoparticles with highly enhanced upconversion luminescence (UCL). Although the core/shell structure is proved to enhance the UCL effectively, there is still plenty of room to further improve the UCL by optimizing the doping ...
Bin Shen, Shengming Cheng, Yuyang Gu, Danrui Ni, Yilin Gao, Qianqian Su, Wei Feng, Fuyou Li   +7 more
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Lanthanide‐Doped Upconversion Nanoparticles for Single‐Particle Imaging

ChemBioChem
Lanthanide‐doped upconversion nanoparticles (UCNPs) have recently demonstrated great promise in single‐particle imaging (SPI) due to their exceptional photostability and minimal background fluorescence. However, their limited brightness has posed a significant barrier to wider adoption in SPI applications.
Huan Ling, Wenrui Zhang, Yunxiang Zhang, Jie Shen, Qian Liu   +4 more
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Spectroscopic assessment of biological tissue temperature using upconversion particles

2016 International Conference Laser Optics (LO), 2016
The optimum pair of bands in the fine structure of nanoparticles luminescence spectra used for measuring local temperature of biological tissue had been determined.
Volkova, E. K., Yanina, Irina Yu., Popov, Alexey P., Skaptsov, A. A., Konyukhova, Julia G., Kochubey, V. I., Tuchin, V. V., Meglinski, I. V.   +7 more
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Upconversion in Ho3+-doped YbF3 particle prepared by coprecipitation method

Applied Physics B, 2008
YbF3 particles doped with Ho3+ were synthesized by coprecipitation method, from which the ultraviolet and visible emission bands of the Ho3+ and the 480 nm cooperative upconversion emission of Yb3+–Yb3+ are observed under 980 nm excitation. Under the same excitation power, the emission intensity of Ho3+ in coprecipitation method is enhanced by about ...
X. Wang, Y. Bu, S. Xiao, X. Yang, J. W. Ding   +4 more
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Upconversion particle-based optical tweezers for sensing applications

Nature Protocols
Optical tweezers use focused laser beams to manipulate small particles, primarily for force sensing. Recent advances in nanoscale-trapping approaches have enabled the development of multiplexed sensing applications, such as temperature and viscosity detection.
Tiange Zhang, Fengchan Zhang, Xuchen Shan, Patricia Haro-González, Daniel Jaque, Fan Wang   +5 more
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Extremely deep photopolymerization using upconversion particles as internal lamps

Polymer Chemistry, 2016
More than 10 centimeters of photopolymerization depth is obtained using upconversion nanoparticles as internal lamps.
Ren Liu, Hao Chen, Zhiquan Li, Feng Shi, Xiaoya Liu   +4 more
openaire   +1 more source