scholarly journals Encapsulation of cationic iridium(iii) tetrazole complexes into a silica matrix: synthesis, characterization and optical properties

2018 ◽  
Vol 42 (12) ◽  
pp. 9635-9644 ◽  
Author(s):  
Ilaria Zanoni ◽  
Valentina Fiorini ◽  
Marcos Rosado ◽  
Belén Ballesteros ◽  
Maria Androulidaki ◽  
...  
Keyword(s):  
Optical Properties ◽  
Silica Matrix ◽  
Matrix Synthesis ◽  
Multi Scale ◽  
Molecular Scale

We designed a multi-scale process, and obtained luminescent powders with preserved optical properties from molecular scale to microscale.

scholarly journals Impact of Magneto-optical Properties Depending on the Orientation in the Plane of Cobalt Ferrite Locked in a Silica Matrix

2021 ◽  
pp. 46-50
Author(s):  
Nandiguim Lamaï ◽  
Désiré Allassem ◽  
Alexis Mouangué Nanimina ◽  
Djimako Bongo ◽  
Togdjim Jonas
Keyword(s):  
Optical Properties ◽  
Faraday Effect ◽  
Cobalt Ferrite ◽  
Magnetic Moments ◽  
Silica Matrix ◽  
Preferential Orientation ◽  
Solid Matrix ◽  
Magnetic Orientation

In this work, we discuss the magneto-optical properties according to the orientation of 15nm-sized cobalt ferrite blocked in a silica matrix in comparison to the study done on 20nm-sized cobalt ferrite. This measurement shows that it is possible to increase the remanence of the Faraday effect by creating a magnetic orientation in the solid matrix, which is interesting for the production of self-polarized components. In addition, this remanence is greater for 15 nm than for 20 nm.A gelation field applied perpendicular to the plane of the layer therefore produces a preferential orientation of the magnetic moments in the direction of the field applied during the measurement.

Optical properties of Rh6G:C337 dye mixture in the sol-gel silica matrix

2004 ◽  
Vol 39 (12) ◽  
pp. 4017-4019 ◽  
Author(s):  
Dae Wook Choi ◽  
Chun Woo Lim ◽  
Sang Ho Sohn
Keyword(s):  
Optical Properties ◽  
Sol Gel ◽  
Silica Matrix

Synthesis, characterisation and optical properties of nanocrystalline Y2O3–Eu3+dispersed in a silica matrix by a deposition–precipitation method

2003 ◽  
Vol 13 (12) ◽  
pp. 3079-3084 ◽  
Author(s):  
Carla Cannas ◽  
Mariano Casu ◽  
Marina Mainas ◽  
Anna Musinu ◽  
Giorgio Piccaluga ◽  
...  
Keyword(s):  
Optical Properties ◽  
Silica Matrix ◽  
Precipitation Method

Microstructure and optical properties of nanocrystalline GaN embedded in silica matrix

2006 ◽  
Vol 96 (2-3) ◽  
pp. 296-300 ◽  
Author(s):  
Hailin Qiu ◽  
Chuanbao Cao ◽  
Dazhi Wang ◽  
Hesun Zhu
Keyword(s):  
Optical Properties ◽  
Silica Matrix

Influence of annealing conditions on size and optical properties of copper nanoparticles embedded in silica matrix

2007 ◽  
Vol 137 (1-3) ◽  
pp. 247-254 ◽  
Author(s):  
Oleg A. Yeshchenko ◽  
Igor M. Dmitruk ◽  
Andriy M. Dmytruk ◽  
Alexandr A. Alexeenko
Keyword(s):  
Optical Properties ◽  
Copper Nanoparticles ◽  
Silica Matrix ◽  
Annealing Conditions

Optical properties of γ-ferric oxide nanoparticles in a mesoporous silica matrix

2008 ◽  
Vol 34 (4) ◽  
pp. 288-291 ◽  
Author(s):  
M. V. Kharlamova ◽  
N. A. Sapoletova ◽  
A. A. Eliseev ◽  
A. V. Lukashin
Keyword(s):  
Optical Properties ◽  
Mesoporous Silica ◽  
Ferric Oxide ◽  
Silica Matrix ◽  
Oxide Nanoparticles

Nanocomposites Based on CdS Quantum Dots for Laser Control Devices

2015 ◽  
Vol 245 ◽  
pp. 67-71
Author(s):  
Alexander A. Sergeev ◽  
S.S. Voznesenskiy ◽  
Anna N. Galkina ◽  
Yu.V. Kuznetsova ◽  
I.D. Popov ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Optical Properties ◽  
Uv Light ◽  
Silica Matrix ◽  
Optical Control ◽  
Polarization Degree ◽  
The Novel ◽  
Optical Absorbance ◽  
Control Devices ◽  
Laser Control

Here we report about study the novel class of nanocomposite for optical control devices. It was observed that nanocomposite based on cadmium sulfide quantum dots in silica matrix can change its optical properties under irradiation of UV-light. These changes are expressed as increasing of optical absorbance coefficient and not only decreasing of luminescence intensity but in some cases red-shifting of maximum. Dependence of quantum dot optical properties upon the kind of matrix and polarization degree of modifying radiation was obtained.

Effects of the scale of precursor mixing on densification behaviors and phase-transformation kinetics of cordierite gels

1994 ◽  
Vol 9 (10) ◽  
pp. 2627-2633 ◽  
Author(s):  
Hyun M. Jang ◽  
Byung C. Lim
Keyword(s):  
Phase Transformation ◽  
Amorphous Silica ◽  
Single Phase ◽  
Spinel Phase ◽  
Silica Matrix ◽  
Nanometer Scale ◽  
Transformation Kinetics ◽  
Phase Transformation Kinetics ◽  
Molecular Scale ◽  
Kinetics Of

Effects of the scale of precursor mixing on densification behaviors and phase-transformation kinetics of multicomponent aluminosilicate gels were examined using cordierite gels prepared by two different processing routes: a monophasic (single phase) gel having molecular homogeneity, and a triphasic gel in which constitutive precursor phases are uniformly mixed in a nanometer scale (∼50 nm). In the case of the monophasic cordierite gel, homogeneous molecular-scale mixing of precursors induces a direction formation of μ-cordierite without a preceding crystallization, and the densification stops at the onset of crystallization to μ-cordierite at 960 °C. On the other hand, the densification of triphasic cordierite gel was not affected by the crystallization of intermediate spinel phase at 700 °C. The triphasic gel continues to densify until amorphous silica matrix crystallizes to quartz at 1180 °C. The enhanced densification observed in the triphasic gel was attributed to the retarded crystallization of amorphous silica component caused by the increase in diffusion distances.

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