Results 21 to 30 of about 3,807 (195)

Lanthanide-semiconductor probes for precise imaging-guided phototherapy and immunotherapy

Journal of Bio-X Research, 2020
. Objective:. Immunotherapy is an effective tumor treatment strategy. However, its long treatment cycle limits its wide application across all cancer types.
Yanxing Wang, Weidong Lü, Ruiyi Dai, Bi Lin, Ruichan Lv   +4 more
doaj   +1 more source

Development of efficient polymer films with upconversion particles

Journal of Physics: Conference Series, 2019
Abstract In this work, the polymer film based on the upconversion particles doped Er3+ and Yb3+ ions and polyethylene was obtained byusing extrusion and hot pressing methods. Upconversion luminescence spectra of polymer films were recorded in the visible spectral range upon excitation by laser radiation at wavelengths of 972 nm and 1532 ...
A A Lyapin, M V Chernov, A M Kuzmin, S V Gushchin, A S Ermakov, P A Ryabochkina   +5 more
openaire   +1 more source

Submicron polyacrolein particles in situ embedded with upconversion nanoparticles for bioassay

Nanoscale, 2015
We report a new surface modification of upconversion nanoparticles based on their encapsulation in the course of acrolein polymerization and demonstrate their in vivo application.
Generalova, AN, Kochneva, IK, Khaydukov, EV, Semchishen, VA, Guller, AE, Nechaev, AV, Shekhter, AB, Zubov, VP, Zvyagin, AV, Deyev, SM   +9 more
openaire   +3 more sources

Luminescent materials as spectral converters: Power dependent profiling of solid NaYF4:Yb3+, Er3+UCNP reveals highly efficient UVA–Blue emission

Energy Reports, 2020
Upconversion is a common process in lanthanides-based materials in which absorption of multiple low energy photons result in a high energy one. The emission spectrum is frequently tuned by changing the composition of the material.
Juan M. Bujjamer, M. Claudia Marchi, Beatriz C. Barja, Hernán E. Grecco   +3 more
doaj   +1 more source

Enhanced Upconversion Emission from K+‑Modified NaGdF4:Er3+/Yb3+ Particles in Flexible Free-Standing Films for Thermal Sensing Application [PDF]

ACS Omega
Ana Beatriz Acosta, Vitor dos Santos de Souza, Francisco Recco Torres, Yaman Masetto Nicolai, Luiz Fernando dos Santos, José Maurício Almeida Caiut, Rogéria Rocha Gonçalves   +6 more
doaj   +2 more sources

Coating on Upconversion Emissive Nano-particles with Photocuring Resin

Journal of Photopolymer Science and Technology, 2007
A coating technology for forming a nano-thickness hydrophobic polymer on upconversion nanophoshpors was developed. A mixed resin with pentaerythritol tetraacrylate and triethyleneglycol dimethacrylate was photocured on the surface of the upconversion phosphor particles with 200 nm size to form a solid coating film with 80 nm.
Soga, Kohei, Okada, Aya, Saito, Yu, Kameyama, Yuji, Konishi, Tomoya   +4 more
openaire   +2 more sources

Effect of different silica coatings on the toxicity of upconversion nanoparticles on RAW 264.7 macrophage cells

Beilstein Journal of Nanotechnology, 2021
Upconversion nanoparticles (UCNPs), consisting of NaYF4 doped with 18% Yb and 2% Er, were coated with microporous silica shells with thickness values of 7 ± 2 and 21 ± 3 nm.
Cynthia Kembuan, Helena Oliveira, Christina Graf   +2 more
doaj   +1 more source

Study of energy transfer processes between rare earth ions and photosensitizer molecules for photodynamic therapy with IR-excitation

Biomedical Photonics, 2022
Today, photodynamic therapy is one of the most promising minimally invasive methods of treatment of various diseases, including cancer. The main limitation of this method is the insufficient penetration into the tissue of laser radiation used to activate
D. V. Pominova, A. S. Bogatova, V. Y. Proydakova, I. D. Romanishkin, E. V. Akhlyustina, S. V. Kuznetsov, T. A. Saveleva, E. A. Lukyanets, V. B. Loschenov   +8 more
doaj   +1 more source

Efficient Lithium-Based Upconversion Nanoparticles for Single-Particle Imaging and Temperature Sensing

Materials, 2023
Upconversion Nanoparticles (UCNPs) have attracted exceptional attention due to their great potential in high-contrast, free-background biofluorescence deep tissue imaging and quantum sensing. Most of these interesting studies have been performed using an ensemble of UCNPs as fluorescent probes in bioapplications.
Yahya A. Alzahrani, Abdulaziz Alromaeh, Masfer Alkahtani   +2 more
openaire   +2 more sources

Characterizing the luminescent properties of upconversion nanoparticles in single and densely packed state [PDF]

Journal of Innovative Optical Health Sciences, 2019
Luminescent properties of Er3+- and Yb3+- co-doped CaF2 upconversion nanoparticles (UCNPs) were investigated in single particle and densely-packed states with a custom-built microscope.
Xiaohu Chen, Zhengyu Gui, Yong Liang, Xin Jin, Simin Li, Pengjiu Zhao, Zhangsen Yu, Aiguo Wu, Shoupeng Liu, Hui Li   +9 more
doaj   +1 more source