Results 1 to 10 of about 3,769 (158)

Upconversion Luminescence Response of a Single YVO₄:Yb, Er Particle

Micromachines, 2023
We present the results of the luminescence response studies of a single YVO4:Yb, Er particle of 1-µm size. Yttrium vanadate nanoparticles are well-known for their low sensitivity to surface quenchers in water solutions which makes them of special ...
Dmitry K. Zharkov, Andrey V. Leontyev, Artemi G. Shmelev, Larisa A. Nurtdinova, Anton P. Chuklanov, Niaz I. Nurgazizov, Victor G. Nikiforov   +6 more
doaj   +3 more sources

Enhanced Single-Particle Upconversion Imaging via Energy Migration Boosting. [PDF]

Adv Sci (Weinh)
Abstract Lanthanide‐doped upconversion nanoparticles (UCNPs) are promising bioimaging probes due to their exceptional photostability and minimal background interference. However, their limited single‐particle brightness has hindered broader applications.
Zhang Y, Wen R, Zhai T, Zhang W, Ding F, Ling H, Zhang Y, Liu Q.   +7 more
europepmc   +3 more sources

Synthesis of Upconversion β-NaYF4:Nd3+/Yb3+/Er3+ Particles with Enhanced Luminescent Intensity through Control of Morphology and Phase

Nanomaterials, 2015
Hexagonal NaYF4:Nd3+/Yb3+/Er3+ microcrystals and nanocrystals with well-defined morphologies and sizes have been synthesized via a hydrothermal route. The rational control of initial reaction conditions can not only result in upconversion (UC) micro and ...
Yunfei Shang, Shuwei Hao, Jing Liu, Meiling Tan, Ning Wang, Chunhui Yang, Guanying Chen   +6 more
doaj   +3 more sources

Sub-10 nm upconversion nanocrystals for long-term single-particle tracking. [PDF]

Nat Commun
Lanthanide-doped upconversion nanoparticles are attractive single-molecule imaging probes due to their high photostability and anti-Stokes luminescence. However, achieving both small particle size and strong brightness has remained a major challenge, as reducing size often leads to dimmer emission.
Qiu X, Guan D, Xia X, Ling H, Hu J, Zhang Y, Chan E, Li F, Liu Q.   +8 more
europepmc   +3 more sources

Cytotoxicity of various types of coated upconversion nanoparticles. Overview [PDF]

Известия Саратовского университета. Новая серия: Физика, 2022
Background and Objectives: The object of the study was the cytotoxicity of various types of coated upconversion nanoparticles. The aim is to overview the literature on the cytotoxicity of various types of upconversion nanoparticles without/with coating ...
Verkhovskii, Roman A., Anisimov, Roman A., Lomova, Maria V., Tuchina, Daria K., Lazareva, Ekaterina Nikolaevna, Doronkina, Anna A., Mylnikov, Artyom M., Navolokin, Nikita Aleksandrovich, Kochubey, Vyacheslav Ivanovich, Yanina, Irina Iur'evna   +9 more
doaj   +1 more source

Activation of Tomato Growth Under Photoconversion Coatings with Nanoluminophor Sr0.76Ba0.20Yb0.02Er0.02F2.04 [PDF]

BIO Web of Conferences, 2023
The effect of coatings containing upconversion luminescent nanoparticles on the cultivation of Solanum lycopersicum has been studied. Sr0.76Ba0.20Yb0.02Er0.02F2.04 particles capable of converting infrared radiation into visible light (λem = 660 nm, 545 ...
Paskhin Mark, Kazantseva Dina, Ermakova Julia, Grigorieva Daria, Yanykin Denis   +4 more
doaj   +1 more source

Effect of the Temperature of NaYF4 : Er,Yb Upсonversion Particles on the Formation of Luminescence [PDF]

Известия Саратовского университета. Новая серия: Физика, 2020
The intensity of upconversion luminescence depends nonlinearly on the excitation intensity. The aim of this work is to study the effect of the temperature of NaYF4:Er,Yb upconversion particles on the dependence of the luminescence intensity on the ...
Sagaidachnaya, Elena Aleksandrovna, Kochubey, Vyacheslav Ivanovich   +1 more
doaj   +1 more source

Toxicity of Upconversion Nanoparticles. Overview [PDF]

Известия Саратовского университета. Новая серия: Физика, 2020
Background and Objectives: The object of the study was the toxicity of upconversion nanoparticles. The aim is to overview the literature on the toxicity of various types of upconversion nanoparticles and to search for their maximum permissible ...
Yanina, Irina Iur'evna, Kochubey, Vyacheslav Ivanovich   +1 more
doaj   +1 more source

A Facile Approach for the Ligand Free Synthesis of Biocompatible Upconversion Nanophosphors

Frontiers in Chemistry, 2022
Upconversion nanophosphors, particles that can absorb low energy radiation and emit high energy light through multi-photon absorption processes, have gained augmented attention in recent years.
Elizabeth Shiby, Kumbam Lingeshwar Reddy, Jatish Kumar   +2 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