Results 21 to 30 of about 3,884 (187)

A Generalized Approach to Photon Avalanche Upconversion in Luminescent Nanocrystals

Nano Letters, 2023
Photon avalanching nanoparticles (ANPs) exhibit extremely nonlinear upconverted emission valuable for sub-diffraction imaging, nanoscale sensing, and optical computing. Avalanching has been demonstrated with Tm3+, Nd3+ or Pr3+-doped nanocrystals, but their emission is limited to 600 and 800 nm, restricting applications.
Skripka, Artiom, Lee, Minji, Qi, Xiao, Pan, Jia-Ahn, Yang, Haoran, Lee, Changhwan, Schuck, P. James, Cohen, Bruce E., Jaque, Daniel, Chan, Emory M.   +9 more
openaire   +5 more sources

Enhanced Upconversion Luminescence in Yb3+/Tm3+-Codoped Fluoride Active Core/Active Shell/Inert Shell Nanoparticles through Directed Energy Migration

Nanomaterials, 2014
The luminescence efficiency of lanthanide-doped upconversion nanoparticles is of particular importance for their embodiment in biophotonic and photonic applications.
Hailong Qiu, Chunhui Yang, Wei Shao, Jossana Damasco, Xianliang Wang, Hans Ågren, Paras N. Prasad, Guanying Chen   +7 more
doaj   +1 more source

CaWO4:Yb3+,Tm3+ Crystals and SrAl2O4:Eu2+,Dy3+ Phosphors in Glass-Based Composites for Green Afterglow after NIR Excitation [PDF]

EPJ Web of Conferences, 2023
Here, we present the preparation of composites with green persistent luminescence using melting process. The composites are phosphate glass (75NaPO3-25CaF2 and 90NaPO3-10NaF (in mol%)) with embedded phosphors: CaWO4: Yb3+, Tm3+ crystals with blue ...
Santos Magalhães Evellyn, Sedda Ahmed, Bondzior Bartosz., Vuori Sami, Van der Heggen David, Smet Philippe F., Lastusaari Mika, Petit Laeticia   +7 more
doaj   +1 more source

VISUALIZATION OF Nd3+-DOPED LaF3 NANOPARTICLES FOR NEAR INFRARED BIOIMAGING VIA UPCONVERSION LUMINESCENCE AT MULTIPHOTON EXCITATION MICROSCOPY

Biomedical Photonics, 2018
Recent developments in the field of biophotonics facilitate the raise of interest to inorganic nanoparticles (NPs) doped with Nd3+ ions, because of their near-infrared (NIR) absorption.
A. V. Ryabova, K. Keevend, E. Tsolaki, S. Bertazzo, D. V. Pominova, I. D. Romanishkin, P. V. Grachev, V. I. Makarov, I. A. Burmistrov, A. S. Vanetsev, E. O. Orlovskaya, A. E. Baranchikov, M. Rähn, I. Sildos, V. Sammelselg, V. B. Loschenov, Y. V. Orlovskii   +16 more
doaj   +1 more source

Luminescent upconversion nanoparticles evaluating temperature-induced stress experienced by aquatic organisms owing to environmental variations

iScience, 2022
Summary: Growing anthropogenic activities are significantly influencing the environment and especially aquatic ecosystems. Therefore, there is an increasing demand to develop techniques for monitoring and assessing freshwater habitat changes so that ...
Alexey Popov, Maxim Timofeyev, Alexander Bykov, Igor Meglinski   +3 more
doaj   +1 more source

JUDD-OFELT ANALYSIS OF Tb3+ AND UPCONVERSION STUDY IN Yb3+-Tb3+ CO-DOPED CALIBO GLASSES

Química Nova
We report on the study of the spectroscopic properties in Ytterbium-Terbium (Yb3+-Tb3+) co-doped calcium lithium borate (CaLiBO) glasses, with the study’s focus being on the upconversion process.
Idelma A. A. Terra, Luis J. Borrero-González, Juliana M. P. Almeida, Antonio C. Hernandes, Luiz A. O. Nunes   +4 more
doaj   +1 more source

Full shell coating or cation exchange enhances luminescence

Nature Communications, 2021
Core-shell designs enhance the luminescence of lanthanide-doped upconversion nanoparticles (UCNPs), but the effect of shell coverage was insufficiently characterized.
Yi Zhang, Pengpeng Lei, Xiaohui Zhu, Yong Zhang   +3 more
doaj   +1 more source

Ultrasensitive Anti‐Stokes Luminescence Thermometry in Transition Metal Dichalcogenide Monolayers

Advanced Functional Materials, EarlyView.
We demonstrate a highly sensitive nanothermometer using anti‐Stokes photoluminescence, also known as photoluminescence upconversion (UPL), in monolayer tungsten disulfide. A strong resonantly enhanced UPL is observed, confirming the central role of optical phonons in the PL upconversion mechanism.
Sharada Nagarkar, Fahrettin Sarcan, Elanur Hut, Emiliano R. Martins, Stuart A. Cavill, Thomas F. Krauss, Yue Wang   +6 more
wiley   +1 more source

Mechanoluminescent HOF Nanotransducers Enabled Sono‐Optogenetics in Parkinsonian Rats

Advanced Functional Materials, EarlyView.
We present a mechanoluminescent system utilizing porous hydrogen‐bonded organic frameworks (HOFs) as a toolkit for focused ultrasound‐triggered, non‐invasive light delivery to the deep brain in rats. This approach enables the specific activation of PV‐GPe neurons in dopamine‐depleted Parkinson's disease rat models, resulting in a comparable alleviation
Wenliang Wang, Ilya Pyatnitskiy, Yanshu Shi, Kai Wing Kevin Tang, Yi Xie, Sihan Yu, Thomas Wynn, Xiangping Liu, Ju‐Chun Hsieh, Jinmo Jeong, Weilong He, Brinkley Artman, Anakaren Romero Lozano, Xi Shi, Arjun Sangani, Lief E Fenno, Samantha Santacruz, Banglin Chen, Huiliang Wang   +18 more
wiley   +1 more source

Upconversion amplification through dielectric superlensing modulation

Nature Communications, 2019
Emission levels useful for applications from upconversion nanoparticles require high laser irradiance. Here, Liang et al. exploit the superlensing effect from dielectric microbeads to enhance the luminescence efficiency of upconversion nanoparticles and ...
Liangliang Liang, Daniel B. L. Teh, Ngoc-Duy Dinh, Weiqiang Chen, Qiushui Chen, Yiming Wu, Srikanta Chowdhury, Akihiro Yamanaka, Tze Chien Sum, Chia-Hung Chen, Nitish V. Thakor, Angelo H. All, Xiaogang Liu   +12 more
doaj   +1 more source