Results 11 to 20 of about 3,884 (187)

Upconversion Luminescence Sensitized pH-Nanoprobes [PDF]

Molecules, 2017
Photon upconversion materials, featuring excellent photophysical properties, are promising for bio-medical research due to their low autofluorescence, non-cytotoxicity, low photobleaching and high photostability.
Manoj Kumar Mahata, Hyeongyu Bae, Kang Taek Lee   +2 more
doaj   +3 more sources

The Combination of Upconversion Nanoparticles and Perovskite Quantum Dots with Temperature-Dependent Emission Colors for Dual-Mode Anti-Counterfeiting Applications

Nanomaterials, 2023
Novel and high-security anti-counterfeiting technology has always been the focus of attention and research. This work proposes a nanocomposite combination of upconversion nanoparticles (UCNPs) and perovskite quantum dots (PeQDs) to achieve color ...
Qun Zhang, Yuefeng Gao, Lihong Cheng, You Li, Sai Xu, Baojiu Chen   +5 more
doaj   +1 more source

Near‐IR to Near‐IR Upconversion Luminescence in Molecular Chromium Ytterbium Salts [PDF]

Angewandte Chemie - International Edition, 2020
Jens Kalmbach, Cui Wang, Christoph Förster   +2 more
exaly   +2 more sources

Spectroscopy and Near-Infrared to Visible Upconversion of Er³⁺ Ions in Aluminosilicate Glasses Manufactured with Controlled Optical Transmission

Applied Sciences, 2021
In this work we report on the spectroscopic properties and the near-infrared to visible upconversion of Er3+ ions in aluminosilicate glasses manufactured by directionally solidification with the laser floating zone technique. Glasses were manufactured in
Daniel Sola, Adrián Miguel, Eduardo Arias-Egido, Jose I. Peña   +3 more
doaj   +1 more source

Dynamic upconversion multicolour editing enabled by molecule-assisted opto-electrochemical modulation

Nature Communications, 2021
Though upconversion nanoparticles (UCNPs) are attractive for infrared detecting and modulating photonic devices, devising strategies to electrically manipulate upconversion emission remain a challenge.
Yiming Wu, Jiahui Xu, Xian Qin, Jun Xu, Xiaogang Liu   +4 more
doaj   +1 more source

Rare‐earth composite as optical upconversion temperature sensor

Electronics Letters, 2022
In this work, rare‐earth composite as an optical upconversion temperature dual mode sensing is practically demonstrated. NaGdF4:Yb3+/Er3+/Zn2+ phosphor was synthesized by the solvothermal method.
Wan Ying Xie, Peng Zhang, Hong Fang Lai, Yin Ling Lai, Zian Cheak Tiu   +4 more
doaj   +1 more source

On the decay time of upconversion luminescence

Nanoscale, 2019
Numerical simulations based on rate-equation models were performed to investigate how the upconversion luminescence decay is affected by the lifetimes of intermediate states, energy transfer, and cross-relaxation processes.
Jan Bergstrand, Qingyun Liu, Bingru Huang, Xingyun Peng, Christian Würth, Ute Resch-Genger, Qiuqiang Zhan, Jerker Widengren, Hans Ågren, Haichun Liu   +9 more
openaire   +4 more sources

Synthesis and Upconversion Luminescence Properties of BaBiO₂Cl:Yb³⁺,Er³⁺ Phosphor

Crystals, 2022
The interaction of near-infrared (NIR) light with matter that produces high-energy visible light emissions is known as photon upconversion, which has shown promising applications in different fields, including optoelectronics, biomedicine and ...
Zhuanzhuan Zhang, Yanjie Liang
doaj   +1 more source

Enhancement of single upconversion nanoparticle imaging by topologically segregated core-shell structure with inward energy migration

Nature Communications, 2022
Manipulating topological arrangement is a powerful tool for tuning the energy migration in molecular systems and inorganic materials. Here, authors synthesize NaErF4 and NaYbF4 upconversion nanoparticles with different architectures and demonstrate ...
Yanxin Zhang, Rongrong Wen, Jialing Hu, Daoming Guan, Xiaochen Qiu, Yunxiang Zhang, Daniel S. Kohane, Qian Liu   +7 more
doaj   +1 more source

Er³⁺-Ions-Doped Multiscale Nanoprobes for Fluorescence Imaging in Cellular and Living Mice

Nanomaterials, 2021
With the development of biotechnology, luminescent nanoprobes for biological disease detection are widely used. However, the further application in clinic is limited by the reduced penetration depth in the tissues and light scattering.
Cong Cao, Yu Xie, Shi-Wen Li, Chang Hong
doaj   +1 more source