The effect of quantum size confinement on the optical properties of PbSe nanocrystals as a function of temperature and hydrostatic pressure

2013 ◽  
Vol 24 (20) ◽  
pp. 205701 ◽  
Author(s):  
Esteban Pedrueza ◽  
Alfredo Segura ◽  
Rafael Abargues ◽  
Jose Bosch Bailach ◽  
Jean Claude Chervin ◽  
...  
Keyword(s):  
Optical Properties ◽  
Hydrostatic Pressure ◽  
Quantum Size ◽  
Size Confinement

Synthesis and Characterization of ZnO Nanoparticles Templated by SBS-OH

2013 ◽  
Vol 864-867 ◽  
pp. 694-697 ◽  
Author(s):  
Yan Ming Chen ◽  
Hong Wei Jia
Keyword(s):  
Optical Properties ◽  
Zno Nanoparticles ◽  
Polar Solvent ◽  
Reaction Process ◽  
Synthesis And Characterization ◽  
Confinement Effects ◽  
Quantum Size ◽  
Size Confinement

ZnO nanoparticles were synthesized by using N, N-dimethylformamide as solvent and poly(styrene-b-butadiene-b-styrene) SBS-OH as stablizer at 100°C through “in situ” reaction process. The optical properties and morphologies for the synthesized ZnO nanoparticles were measured through UV-Vis, PL and TEM methods. The results show that corona-embedded ZnO nanoparticles could be obtained by SBS-OH micelles in polar solvent DMF. The obtained ZnO nanoparticles could give an apparent quantum size confinement effects and PL results show that ZnO nanoparticles could give good luminescence properties.

QUANTUM-SIZE EFFECTS ON THE OPTICAL PROPERTIES OF SMALL PARTICLES

1983 ◽  
Vol 44 (C10) ◽  
pp. C10-375-C10-378 ◽  
Author(s):  
P. Ahlqvist ◽  
P. de Andrés ◽  
R. Monreal ◽  
F. Flores
Keyword(s):  
Optical Properties ◽  
Size Effects ◽  
Quantum Size Effects ◽  
Small Particles ◽  
Quantum Size

Exciton-related optical properties in zinc-blende GaN/InGaN quantum wells under hydrostatic pressure

2015 ◽  
Vol 252 (4) ◽  
pp. 670-677 ◽  
Author(s):  
C. M. Duque ◽  
A. L. Morales ◽  
M. E. Mora-Ramos ◽  
C. A. Duque
Keyword(s):  
Optical Properties ◽  
Hydrostatic Pressure ◽  
Quantum Wells ◽  
Zinc Blende ◽  
Ingan Quantum Wells

Applications of Quantum Dots in Cancer Research

2011 ◽  
Vol 345 ◽  
pp. 29-34
Author(s):  
Xue Feng Wang ◽  
Jing Ding ◽  
Ji Yu Li ◽  
Han Jiang ◽  
Zi Hao Wang ◽  
...  
Keyword(s):  
Cancer Research ◽  
Quantum Dots ◽  
Optical Properties ◽  
Nanocrystalline Materials ◽  
Mammary Cancer ◽  
Cell Tracking ◽  
Bohr Radius ◽  
Quantum Size ◽  
Highly Sensitive ◽  
Diagnosis Rate

Quantum dots(QDs) usually refers to nanocrystalline materials whose diameter is smaller than the exciton Bohr radius. These materials have quantum size effect,the most significant manifestation is their optical properties change with particle size.The unique optical properties make quantum dots to be Ideal markers for tumor cell tracking and targeting,such as mammary cancer, liver cancer, and melanoma.There are broad prospects in tapping the potential of this highly sensitive technology in serum and other body fluids, so as to increase the early diagnosis rate of tumors.

Optical properties of BP, BAs and BSb compounds under hydrostatic pressure

2005 ◽  
Vol 367 (1-4) ◽  
pp. 195-204 ◽  
Author(s):  
A. Zaoui ◽  
S. Kacimi ◽  
A. Yakoubi ◽  
B. Abbar ◽  
B. Bouhafs
Keyword(s):  
Optical Properties ◽  
Hydrostatic Pressure

Optical Properties of Microcrystalline Silicon in Oxide Matrix through Partial Oxidation of Anodized Porous Silicon

1991 ◽  
Vol 256 ◽  
Author(s):  
Toshimichi Ito ◽  
Toshimichi Ohta ◽  
Osamu Arakaki ◽  
Akio Hiraki
Keyword(s):  
Optical Properties ◽  
Porous Silicon ◽  
Partial Oxidation ◽  
Silicon Oxide ◽  
Light Emission ◽  
Wavelength Region ◽  
Microcrystalline Silicon ◽  
Quantum Size ◽  
Visible Luminescence ◽  
Oxide Matrix

ABSTRACTMicrocrystalline silicon embedded in silicon oxide has been prepared by means of partial oxidation of porous silicon produced anodically from degenerate p-Si wafers. Their optical properties such as absorption coefficients and luminescence have been characterized. Results show blue shifts in absorption and photoluminescence spectra in a visible wavelength region with decreasing size of the microcrystalline Si in the Si oxide matrix. The quantum size effect is discussed as well as possible origins of the observed visible luminescence, including light emission from as-anodized (or H-chemisorbed) porous silicon.

Tuning band gap and optical properties of SnX2 nanosheets: Hybrid functional studies

2016 ◽  
Vol 30 (10) ◽  
pp. 1650120 ◽  
Author(s):  
P. Guo ◽  
Y. W. Luo ◽  
Y. Jia
Keyword(s):  
Optical Properties ◽  
Optical Absorption ◽  
Band Gap ◽  
Electronic Structures ◽  
Threshold Values ◽  
Hybrid Functional ◽  
Functional Studies ◽  
Quantum Size ◽  
Light Activity ◽  
Optical Applications

Based on hybrid functional calculations, the electronic structures and optical properties are investigated in the monolayer and bilayer tin dichalcogenides SnX2 (X = S and Se) nanosheets. Numerical results show that quantum size effects are obvious on the electronic structures and optical absorption in the SnS2 and SnSe2 nanosheets. The band gap values increase when the nanosheets layer numbers decrease. Moreover, for SnSe2 nanosheet, the optical absorption coefficients are high and its threshold values lie in the visible light activity range. These results are interesting and indicate that SnS2 and SnSe2 nanosheets may serve as the promising candidates for visible optical applications.

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