Magnetic and luminescent dual-functional SiO2 beads created through controlled sol-gel process
Zhongsen Yang*
State Key Laboratory of Crystal Materials, Shandong University, Jinan 250100, P. R. China
Adv. Mater. Lett., 2011, 2 (3), pp 195-199
DOI: 10.5185/amlett.2011.1212
Publication Date (Web): Apr 08, 2012
Copyright © 2019 VBRI Press
E-mail: zsyang@sdu.edu.cn
A controlled sol-gel approach was developed to encapsulate luminescent CdTe and magnetic Fe3O4 nanocrystals (NCs) into SiO2 beads. The preparation procedure included the preparation of SiO2-coated Fe3O4 NCs, the attachment of the CdTe NCs on the SiO2-coated Fe3O4 NCs, the assembly of the CdTe NCs-attached Fe3O4 NCs, and the growth of a SiO2 shell. To prevent the photoluminescence (PL) quenching, Fe3O4 NCs were coated with a thin SiO2 layer before encapsulating into SiO2 beads together with CdTe NCs. The CdTe NCs retained high PL efficiency (30 %) in dual functional SiO2 beads. These SiO2 beads also revealed superparamagnetic behavior. The result would be utilizable for further application because of their high PL efficiency and magnetic property. The strategy described here should give a useful enlightenment for the design and fabrication of multiple functional SiO2 beads.
Bi-functional SiO2 beads, iron oxide magnetic nanoparticlels, semiconduductor nanocrystal
Smart Healthcare pulls up Clouds for Virtual Medicine
Selecting the correct electromagnetic inspection technology
Influence of railway-track grinding on the track material condition and tribological behaviour
Micromechanical Fatigue Modelling of the Size Effect in Micro-Scale 316L Stainless Steel Specimens
Functionalization of Graphene and Reduced Graphene Oxide in Different Matrices
Effect of parasitic polytypes on ballistic electron transport in chemical vapor deposition grown 6H-SiC epitaxial layers
Photomemristive heterostructures based on two-dimensional crystals
Architecture - behaviour - properties relationship in Star-shaped MPA-PMMA and MPA-PS hyper-branched copolymers
Graphene and doped graphene: A comparative DFT study
Ag2CO3 / Magnetic reduced graphene oxide nanocomposite as advanced visible light photocatalytic hybrid materials for efficient degradation of azo dye
Optimization of acid hydrolysis process for the preparation cellulose nanofibrils
Alginate/k-carrageenan and alginate/gelatin composite hydrogel beads for controlled drug release of curcumin
Study of microstructure and mechanical properties of friction stir welded ferrite-martensite DP700 steel
9th Anniversary of Advanced Materials Letters: Progress and Opportunities
Coating - A potent method to enhance electrochemical performance of Li(NixMnyCoz)O2 cathodes for Li-ion batteries
Analysis of machined electron beam treated Ti6Al4V-ELI implant surfaces
Bottom-up design of hydrogels through click-chemistry modification of magnetic nanoparticles
Visualization of mechanical loads with semiconductor nanocrystals
Room temperature growth of ultra porous hot-wire deposited tantalum pentoxide
Substrate integrated circular cavity resonator filled with nano-fibrillated cellulose for humidity detection
Oxygen vacancy filament-based resistive switching in Hf0.5Zr0.5O2 thin films for non-volatile memory
Innovative silicon compatible materials for light emitting devices
Graphene micromesh for transparent conductive films application
Applications of nano-scale Cirrus DopantTM to improve existing coatings
Chitin nanofibrils in renewable materials for packaging and personal care applications
Synthesis of AgNPs embedded double network nanocomposite hydrogels having high swelling and anti-bacterial characteristics
Copyright ©2010-2019 VBRI Press
Full Article