• 主页
  • 查找结果
  • Near-infrared to visible upconversion in Tm3+ and Yb3+ codoped Lu2O3 nanocrystals synthesized by hydrothermal method.

Near-infrared to visible upconversion in Tm3+ and Yb3+ codoped Lu2O3 nanocrystals synthesized by hydrothermal method.

Journal of nanoscience and nanotechnology (2014-04-18)
Li Li, Xingli Zhang, Xiantao Wei, Guangchuan Wang, Changxin Guo
摘要

Lutetium oxide nanocrystals codoped with Tm3+ and Yb3+ have been successfully synthesized via adjusting the pH values of the precursor solution in a hydrothermal method followed by a subsequent calcination process. The samples were systematically characterized by X-ray diffraction, field-emission scanning microscopy, Fourier transform infrared transmittance spectroscopy, and upconversion luminescent spectra. The experimental results show that the pH values of the precursor solution have great effects on the structural, morphological, and upconversion luminescent properties of Lu2O3:2%Yb3+, 0.2%Tm3+ nanocrystals. The as-formed lutetium oxide precursors could transform to cubic Lu2O3 with the same morphology and a slight shrinkage in size after a calcination process. The upconversion emission intensity of Lu2O3:2%Yb3+, 0.2%Tm3+ nanocrystals obtained from the precursor solution with pH = 9 is the strongest. The enhancement of the upconversion luminescence is suggested to be the consequence of reducing the number of OH- groups and the enlarged nanocrystals size. Strong blue and weak red emissions from the prepared nanocrystals were observed under 980 nm laser excitation, which were attributed to the 1G4 --> 3H6 and 1G4 --> 3F4 transitions of Tm3+ ion, respectively.

材料
货号
品牌
产品描述

Sigma-Aldrich
水, Nuclease-Free Water, for Molecular Biology
Sigma-Aldrich
水, suitable for HPLC
Sigma-Aldrich
水, sterile-filtered, BioReagent, suitable for cell culture
Sigma-Aldrich
水, HPLC Plus
Supelco
水, suitable for ion chromatography
Sigma-Aldrich
水, deionized
Sigma-Aldrich
水, for molecular biology, sterile filtered
Sigma-Aldrich
水, for embryo transfer, sterile-filtered, BioXtra, suitable for mouse embryo cell culture
纯水密度标准物质RM, 0.9982 g/mL(20 °C), UKAS ISO/IEC17025 and ISO Guide 34 certified, density: 0.9982 g/mL at 20 °C, density: 0.9970 g/mL at 25 °C
Supelco
水, for TOC analysis
Supelco
水, ACS reagent, for ultratrace analysis
Sigma-Aldrich
水, BioPerformance Certified
Sigma-Aldrich
水, PCR Reagent
Sigma-Aldrich
E-Toxate 水, endotoxin, free
Sigma-Aldrich
水, for cell biology, sterile ultrafiltered
Supelco
密度标准品 998kg/m3, H&D Fitzgerald Ltd. Quality
Sigma-Aldrich
低氘水, ≤1 ppm (Deuterium oxide)
Sigma-Aldrich
水, ACS reagent
Sigma-Aldrich
水, tested according to Ph. Eur.
Supelco
水, for HPCE, for luminescence, suitable for UV/Vis spectroscopy
水, UKAS ISO/IEC17025 and ISO Guide 34 certified, density: 0.9982 g/mL at 20 °C, density: 0.9970 g/mL at 25 °C
Sigma-Aldrich
镱, powder, ≥99.9% trace rare earth metals basis
Sigma-Aldrich
水-16O, ≥99.94 atom % 16O
Sigma-Aldrich
镱, chunks, 99.9% trace metals basis
Sigma-Aldrich
镱, chips, 99.9% trace rare earth metals basis
Sigma-Aldrich
镱, ingot, 99.9% trace rare earth metals basis
铥, wire, 0.1m, diameter 0.6mm, 99%
铥, foil, 25x25mm, thickness 0.15mm, as rolled, 99%
铥, foil, 25x25mm, thickness 0.1mm, as rolled, 99%
铥, foil, 50x50mm, thickness 0.15mm, as rolled, 99%

社交媒体

LinkedIn icon
Twitter icon
Facebook Icon
Instagram Icon

Merck

科研、开发、生产。

作为生命科学行业的全球领先供应商,我们致力于为科研、生物技术开发和生产,以及制药药物疗法开发和生产提供各类解决方案和服务。

© 2021年版权归德国达姆施塔特默克集团(Merck KGaA)及/或其附属公司所有。版权所有。

未经许可,严禁复制本网站上的任何资料。