Results 11 to 20 of about 19,709 (232)

Toxicity of Upconversion Nanoparticles. Overview [PDF]

open access: yesИзвестия 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   +1 more
doaj   +1 more source

Microscale Self-Assembly of Upconversion Nanoparticles Driven by Block Copolymer

open access: yesFrontiers in Chemistry, 2020
Lanthanide-based upconversion nanoparticles can convert low-energy excitation to high-energy emission. The self-assembled upconversion nanoparticles with unique structures have considerable promise in sensors and optical devices due to intriguing ...
Qianqian Su   +6 more
doaj   +1 more source

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

open access: yesFrontiers 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   +2 more
doaj   +1 more source

Sub-20 nm Core-Shell-Shell Nanoparticles for Bright Upconversion and Enhanced Förster Resonant Energy Transfer. [PDF]

open access: yes, 2019
Upconverting nanoparticles provide valuable benefits as optical probes for bioimaging and Förster resonant energy transfer (FRET) due to their high signal-to-noise ratio, photostability, and biocompatibility; yet, making nanoparticles small yields a ...
Alivisatos, A Paul   +9 more
core   +1 more source

Multi-Color Luminescence Transition of Upconversion Nanocrystals via Crystal Phase Control with SiO2 for High Temperature Thermal Labels [PDF]

open access: yes, 2020
Upconversion nanocrystals (UCNs)-embedded microarchitectures with luminescence color transition capability and enhanced luminescence intensity under extreme conditions are suitable for developing a robust labeling system in a high-temperature thermal ...
Baek, Dahye   +8 more
core   +1 more source

Upconversion nanoparticles for bioimaging

open access: yesNanotechnology Reviews, 2017
Fluorescent labeling is a widely used indispensable tool in biology. Conventional downconversion fluorescence labels with ultraviolet or short-wavelength excitation suffer from autofluorescence, low signal-to-noise ratio, and incident photo damage to ...
Song Chenxi   +5 more
doaj   +1 more source

Rare earth based nanostructured materials: Synthesis, functionalization, properties and bioimaging and biosensing applications [PDF]

open access: yes, 2017
Rare earth based nanostructures constitute a type of functional materials widely used and studied in the recent literature. The purpose of this review is to provide a general and comprehensive overview of the current state of the art, with special focus ...
Becerro Nieto, Ana Isabel   +7 more
core   +1 more source

Upconversion Nanomaterials: Synthesis, Mechanism, and Applications in Sensing

open access: yesSensors, 2012
Upconversion is an optical process that involves the conversion of lower-energy photons into higher-energy photons. It has been extensively studied since mid-1960s and widely applied in optical devices. Over the past decade, high-quality rare earth-doped
Julia Xiaojun Zhao, Jiao Chen
doaj   +1 more source

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