Formation of Single-phase CuO Quantum Particles

2002 ◽  
Vol 17 (5) ◽  
pp. 1220-1223 ◽  
Author(s):  
Kavita Borgohain ◽  
Shailaja Mahamuni
Keyword(s):  
Optical Absorption ◽  
Absorption Spectra ◽  
Size Effects ◽  
Single Phase ◽  
Absorption Feature ◽  
Quantum Size Effects ◽  
Optical Absorption Spectra ◽  
Quantum Size ◽  
Quantum Particles ◽  
Cuo Nanocrystals

CuO nanocrystals of three different sizes 3.5, 6.5, and 10.0 nm were synthesized by a novel electrochemical route. Quantum size effects in these nanocrystals are evident from the optical absorption spectra. The optical absorption feature is observed to be blue shifted by about 1 eV with size reduction. The CuO q-particles were found to be single-phased and very stable as far as the size and phase is concerned.

OPTICAL ABSORPTION OF CONFINED EXCITONS IN Tl HALIDE THIN FILMS

2001 ◽  
Vol 15 (28n30) ◽  
pp. 3769-3772
Author(s):  
A. FUJII ◽  
T. ONO ◽  
W. YU ◽  
R. MAKI
Keyword(s):  
Thin Films ◽  
Optical Absorption ◽  
Size Effect ◽  
Exchange Interaction ◽  
Absorption Spectra ◽  
Crystal Size ◽  
Experimental Results ◽  
Optical Absorption Spectra ◽  
Electron Hole ◽  
Quantum Size

Optical absorption spectra of the direct exciton of TlCl and TlBr micro-crystals are measured in evaporated thin films at 5.0K. The energy of the direct exciton bands shift to higher energy with decreasign micro-crystal size. The lower component of the doublet of the exciton in TlCl decreases its intensity with decreasing micro-crystal size. The experimental results are discussed with the quantum-size effect on the exciton states and on the electron-hole exchange interaction in an exciton.

Quantum Size Effects on Dielectric Constants and Optical Absorption of Ultrathin Silicon Films

2008 ◽  
Vol 29 (12) ◽  
pp. 1302-1305 ◽  
Author(s):  
Gang Zhang ◽  
Ming-Bin Yu ◽  
Chih-Hang Tung ◽  
Guo-Qiang Lo
Keyword(s):  
Optical Absorption ◽  
Size Effects ◽  
Dielectric Constants ◽  
Silicon Films ◽  
Quantum Size Effects ◽  
Quantum Size

Search for quantum size effects in ultrathin epitaxial metallic films

1991 ◽  
Vol 16 (6) ◽  
pp. 623-638 ◽  
Author(s):  
P.A. Badoz ◽  
F. Arnaud d'Avitaya ◽  
E. Rosencher
Keyword(s):  
Size Effects ◽  
Quantum Size Effects ◽  
Metallic Films ◽  
Quantum Size

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

Quantum size effects in semiconducting and semimetallic films

1968 ◽  
Vol 96 (9) ◽  
pp. 61-86 ◽  
Author(s):  
B.A. Tavger ◽  
V.Ya. Demikhovskii
Keyword(s):  
Size Effects ◽  
Quantum Size Effects ◽  
Quantum Size
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