Determination of critical points on silicon nanofilms: surface and quantum confinement effects

2008 ◽  
Vol 5 (12) ◽  
pp. 3776-3779 ◽  
Author(s):  
Emmanouil Lioudakis ◽  
Andreas Othonos ◽  
A. G. Nassiopoulou
Keyword(s):  
Critical Points ◽  
Quantum Confinement ◽  
Confinement Effects ◽  
Quantum Confinement Effects

scholarly journals Observation of Quantum Confinement Effects with cmd="newline" Ultrashort Excitation in the Vicinity of Direct Critical Points cmd="newline" in Silicon Nanofilms

2008 ◽  
Vol 2008 ◽  
pp. 1-5 ◽  
Author(s):  
Andreas Othonos ◽  
Demetra Tsokkou ◽  
Emmanouil Lioudakis
Keyword(s):  
Film Thickness ◽  
Critical Points ◽  
Quantum Confinement ◽  
Transient Absorption ◽  
Energy Curve ◽  
Confinement Effects ◽  
Quantum Confinement Effects ◽  
Uv Excitation ◽  
State Filling ◽  
Absorption Measurements

We report on the observation of quantum confinement effects and the influence of surface-related states due to the formation of nanograins on ultrashort relaxation near the direct critical points of silicon nanofilms following UV-excitation. Direct photoexcitation of the samples in the vicinity of the critical points of the first Brillouin zone has been achieved using femtosecond pulses in the spectra range of 290–400 nm. Transient absorption measurements show a substantial enhancement of state filling with decreasing the film thickness down to 5 nm due to quantum confinement in the z-direction. Furthermore, the state filling of surface-related states of nanograins suggests that the critical points of these states follow the ellipsometry extracted energy-curve.

Quantum confinement effects and strain-induced band-gap energy shifts in core-shell Si-SiO2nanowires

2011 ◽  
Vol 83 (24) ◽  
Author(s):  
O. Demichel ◽  
V. Calvo ◽  
P. Noé ◽  
B. Salem ◽  
P.-F. Fazzini ◽  
...  
Keyword(s):  
Band Gap ◽  
Quantum Confinement ◽  
Band Gap Energy ◽  
Core Shell ◽  
Confinement Effects ◽  
Gap Energy ◽  
Quantum Confinement Effects

Quantum Confinement Effects in Organic Lead Tribromide Perovskite Nanoparticles

2016 ◽  
Vol 120 (32) ◽  
pp. 18333-18339 ◽  
Author(s):  
Prashant Kumar ◽  
Chinnadurai Muthu ◽  
Vijayakumar C. Nair ◽  
K. S. Narayan
Keyword(s):  
Quantum Confinement ◽  
Confinement Effects ◽  
Quantum Confinement Effects ◽  
Organic Lead ◽  
Perovskite Nanoparticles

Strong quantum-confinement effects in the conduction band of germanium nanocrystals

2004 ◽  
Vol 84 (20) ◽  
pp. 4056-4058 ◽  
Author(s):  
C. Bostedt ◽  
T. van Buuren ◽  
T. M. Willey ◽  
N. Franco ◽  
L. J. Terminello ◽  
...  
Keyword(s):  
Conduction Band ◽  
Quantum Confinement ◽  
Confinement Effects ◽  
Quantum Confinement Effects ◽  
Germanium Nanocrystals

Charge Transport in Cu2S Nanocrystals Arrays: Effects of Crystallite Size and Ligand Length

2015 ◽  
Vol 229 (1-2) ◽  
Author(s):  
Yehonadav Bekenstein ◽  
Orian Elimelech ◽  
Kathy Vinokurov ◽  
Oded Millo ◽  
Uri Banin
Keyword(s):  
Charge Transport ◽  
Crystallite Size ◽  
Quantum Confinement ◽  
Confinement Effects ◽  
Transport Measurements ◽  
Quantum Confinement Effects

AbstractQuantum confinement effects are observed in transport measurements of Cu

Probing quantum confinement effects on the excitonic property and electronic band structures of MoS2

2020 ◽  
Vol 519 ◽  
pp. 146262
Author(s):  
Xudan Zhu ◽  
Dahai Li ◽  
Rongjun Zhang ◽  
Hao Zhang ◽  
Chunxiao Cong ◽  
...  
Keyword(s):  
Quantum Confinement ◽  
Confinement Effects ◽  
Band Structures ◽  
Electronic Band ◽  
Quantum Confinement Effects ◽  
Electronic Band Structures
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