Synthesis of Phosphor Photonic Crystals by Self-Assembly of SiO[sub 2]/Y[sub 2]O[sub 3]:Tb[sup 3+] Core/Shell Particles and Its Photoluminescence Properties

2010 ◽  
Vol 157 (10) ◽  
pp. J358 ◽  
Author(s):  
Hyoung Sun Yoo ◽  
Sung Wook Kim ◽  
Duk Young Jeon
Keyword(s):  
Photonic Crystals ◽  
Self Assembly ◽  
Core Shell ◽  
Photoluminescence Properties ◽  
Shell Particles

scholarly journals EXPERIMENTAL STUDY OF 3D SELF-ASSEMBLED PHOTONIC CRYSTALS AND COLLOIDAL CORE-SHELL SEMICONDUCTOR QUANTUM DOTS

2017 ◽  
Vol 24 (1&2) ◽  
pp. 161-170
Author(s):  
Pham Thu Nga ◽  
Vu Duc Chinh ◽  
Nguyen Xuan Nghia ◽  
Nguyen Viet Huy ◽  
Dao Nguyen Thuan ◽  
...  
Keyword(s):  
Experimental Study ◽  
Quantum Dots ◽  
Optical Properties ◽  
Photonic Crystal ◽  
Photonic Crystals ◽  
Self Assembly ◽  
Photonic Band Gap ◽  
Semiconductor Quantum Dots ◽  
Core Shell ◽  
Sphere Diameter

In this contribution we present an experimental study of 3D opal photonic crystals. The samples are opals constituted by colloidal silica spheres, realized with self-assembly technique. The sphere diameter is selected in order to obtain coupling of the photonic band gap with the emission from CdSe/ZnS colloidal quantum dots. The quantum dots infiltrated in the opals is expected to be enhanced or suppressed depending on the detection angle from the photonic crystal. The structural and optical characterization of the SiO2 opal photonic crystals are performed by field-emission scanning electron microscopy and reflectivity spectroscopy. Measurements performed on samples permits to put into evidence the influence of the different preparation methods on the optical properties. Study of self-activated luminescence of the pure opals is also presented. It is shown that the luminescence of the sample with QDs have original QD emission and not due to the photonic crystal structure. The optical properties of colloidal core-shell semiconductor quantum dots of CdSe/ZnS which are prepared in our lab will be mention.

Sonochemically Produced ZnS-Coated Polystyrene Core−Shell Particles for Use in Photonic Crystals

Langmuir ◽  
2001 ◽  
Vol 17 (3) ◽  
pp. 903-907 ◽  
Author(s):  
M. L. Breen ◽  
A. D. Dinsmore ◽  
R. H. Pink ◽  
S. B. Qadri ◽  
B. R. Ratna
Keyword(s):  
Photonic Crystals ◽  
Core Shell ◽  
Shell Particles

Tuning the Mechanical Properties of Hydrogel Core–Shell Particles by Inwards Interweaving Self-Assembly

2016 ◽  
Vol 8 (2) ◽  
pp. 1493-1500 ◽  
Author(s):  
Houwen Matthew Pan ◽  
Maximilian Seuss ◽  
Martin P. Neubauer ◽  
Dieter W. Trau ◽  
Andreas Fery
Keyword(s):  
Mechanical Properties ◽  
Self Assembly ◽  
Core Shell ◽  
Shell Particles

scholarly journals Preparation, Properties, and Self-Assembly Behavior of PTFE-Based Core-Shell Nanospheres

2012 ◽  
Vol 2012 ◽  
pp. 1-15 ◽  
Author(s):  
Katia Sparnacci ◽  
Diego Antonioli ◽  
Simone Deregibus ◽  
Michele Laus ◽  
Giampaolo Zuccheri ◽  
...  
Keyword(s):  
Particle Size ◽  
Self Assembly ◽  
Colloidal Crystal ◽  
Colloidal Crystals ◽  
Direct Consequence ◽  
Core Shell ◽  
Precise Control ◽  
Assembly Behavior ◽  
Shell Particles ◽  
High Degree

Nanosized PTFE-based core-shell particles can be prepared by emulsifier-free seed emulsion polymerization technique starting from spherical or rod-like PTFE seeds of different size. The shell can be constituted by the relatively high Tg polystyrene and polymethylmethacrylate as well as by low Tg polyacrylic copolymers. Peculiar thermal behavior of the PTFE component is observed due to the high degree of PTFE compartmentalization. A very precise control over the particle size can be exerted by properly adjusting the ratio between the monomers and the PTFE seed. In addition, the particle size distribution self-sharpens as the ratio monomer/PTFE increases. Samples with uniformity ratios suited to build 2D and 3D colloidal crystals are easily prepared. In particular, 2D colloidal crystal of spheres leads to very small 2D nanostructuration, useful for the preparation of masks with a combination of nanosphere lithography and reactive ion etching. 3D colloidal crystals were also obtained featuring excellent opal quality, which is a direct consequence of the monodispersity of colloids used for their growth.

Cross-Linking Density and Temperature Effects on the Self-Assembly of SiO2-PNIPAAm Core-Shell Particles at Interfaces

2013 ◽  
Vol 19 (18) ◽  
pp. 5586-5594 ◽  
Author(s):  
Kadriye Özlem Nazli ◽  
Christian W. Pester ◽  
Artjom Konradi ◽  
Alexander Böker ◽  
Patrick van Rijn
Keyword(s):  
Self Assembly ◽  
Temperature Effects ◽  
The Self ◽  
Cross Linking ◽  
Core Shell ◽  
Shell Particles

Synthesis and Photoluminescence Properties of Monodisperse Spherical SiO2@Lu2O3: Eu3+ Particles with Core-Shell Structure

2014 ◽  
Vol 1004-1005 ◽  
pp. 389-392
Author(s):  
Huan Wang
Keyword(s):  
Smooth Surface ◽  
Sol Gel ◽  
Spherical Shape ◽  
Core Shell ◽  
Narrow Size Distribution ◽  
Photoluminescence Properties ◽  
The Core ◽  
Sol Gel Process ◽  
Core Shell Structure ◽  
Shell Particles

Spherical submicron SiO2 particles have been coated with luminescent Lu2O3: Eu3+ layers by a Pechini sol-gel process, resulting in the formation of SiO2@Lu2O3: Eu3+ core-shell particles(300, 500 nm). The obtained core–shell phosphors have perfect spherical shape with narrow size distribution, smooth surface and non-agglomeration. The thickness of shells could be easily controlled by changing the number of deposition cycles (50 nm for four deposition cycles). Under the excitation of ultraviolet, the Eu3+ ion mainly shows its characteristic emissions in the core-shell particles from Lu2O3: Eu3+) shells. The PL intensity of Eu3+ increases with the number of coating cycles.

Magnetic Fe2O3−Polystyrene/PPy Core/Shell Particles:  Bioreactivity and Self-Assembly

Langmuir ◽  
2007 ◽  
Vol 23 (22) ◽  
pp. 10940-10949 ◽  
Author(s):  
Claire Mangeney ◽  
Meriem Fertani ◽  
Smain Bousalem ◽  
Ma Zhicai ◽  
Souad Ammar ◽  
...  
Keyword(s):  
Self Assembly ◽  
Core Shell ◽  
Shell Particles

Inside Cover: Cross-Linking Density and Temperature Effects on the Self-Assembly of SiO2-PNIPAAm Core-Shell Particles at Interfaces (Chem. Eur. J. 18/2013)

2013 ◽  
Vol 19 (18) ◽  
pp. 5498-5498
Author(s):  
Kadriye Özlem Nazli ◽  
Christian W. Pester ◽  
Artjom Konradi ◽  
Alexander Böker ◽  
Patrick van Rijn
Keyword(s):  
Self Assembly ◽  
Temperature Effects ◽  
The Self ◽  
Cross Linking ◽  
Core Shell ◽  
Shell Particles
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