Finite size effect on the phase transition of vanadium dioxide

2013 ◽  
Vol 103 (4) ◽  
pp. 043108 ◽  
Author(s):  
M. Nazari ◽  
Y. Zhao ◽  
V. Hallum ◽  
A. A. Bernussi ◽  
Z. Y. Fan ◽  
...  
Keyword(s):  
Phase Transition ◽  
Size Effect ◽  
Vanadium Dioxide ◽  
Finite Size ◽  
Finite Size Effect

The Finite Size Effect on The Metal-Insulator Transition of VO2 Films Grown by MOCVD

1991 ◽  
Vol 237 ◽  
Author(s):  
Hyung Kook Kim ◽  
R. P. Chiarello ◽  
Hoydoo You ◽  
M. H. L. Chang ◽  
T. J. Zhang ◽  
...  
Keyword(s):  
Phase Transition ◽  
Particle Size ◽  
Transition Temperature ◽  
Size Effect ◽  
Thermal Hysteresis ◽  
Finite Size ◽  
Finite Size Effect ◽  
Transition Width ◽  
Metal Insulator ◽  
Out Of Plane

ABSTRACTWe studied the finite size effect on the metal-insulator phase transition and the accompanying tetragonal to monoclinic structural phase transition of VO2 films grown by MOCVD. X-ray diffraction measurements and electrical conductivity measurements were done as a function of temperature for VO2 films with out-of plane particle size ranging from 60–310Å. Each VO2 film was grown on a thin TiO2 buffer layer, which in turn was grown by MOCVD on a polished sapphire (1120) substrate. The transition was found to be first order. As the out-of plane particle size becomes larger, the transition temperature shifts and the transition width narrows. For the 60Å film the transition was observed at ∼61°C with a transition width of ∼10°C, while for the 310Å film the transition temperature was ∼59°C and the transition width ∼2°C. We also observed thermal hysteresis for each film, which became smaller with increasing particle size.

scholarly journals Theoretical Investigation of the Size Effect on the Oxygen Adsorption Energy of Coinage Metal Nanoparticles

2021 ◽  
Author(s):  
Amir H. Hakimioun ◽  
Elisabeth M. Dietze ◽  
Bart D. Vandegehuchte ◽  
Daniel Curulla-Ferre ◽  
Lennart Joos ◽  
...  
Keyword(s):  
Particle Size ◽  
Size Effect ◽  
Adsorption Energy ◽  
Single Point ◽  
Finite Size ◽  
Geometry Optimization ◽  
Oxygen Adsorption ◽  
Finite Size Effect ◽  
Full Geometry Optimization ◽  
Coinage Metal

AbstractThis study evaluates the finite size effect on the oxygen adsorption energy of coinage metal (Cu, Ag and Au) cuboctahedral nanoparticles in the size range of 13 to 1415 atoms (0.7–3.5 nm in diameter). Trends in particle size effects are well described with single point calculations, in which the metal atoms are frozen in their bulk position and the oxygen atom is added in a location determined from periodic surface calculations. This is shown explicitly for Cu nanoparticles, for which full geometry optimization only leads to a constant offset between relaxed and unrelaxed adsorption energies that is independent of particle size. With increasing cluster size, the adsorption energy converges systematically to the limit of the (211) extended surface. The 55-atomic cluster is an outlier for all of the coinage metals and all three materials show similar behavior with respect to particle size. Graphic Abstract

scholarly journals Finite-size effect of critical penetration of Pearl vortices in narrow superconducting flat rings

2019 ◽  
Vol 125 (22) ◽  
pp. 223906 ◽  
Author(s):  
N. Kokubo ◽  
S. Okayasu ◽  
T. Nojima
Keyword(s):  
Size Effect ◽  
Finite Size ◽  
Finite Size Effect

scholarly journals Finite Size Effect on Spread of Resonance Frequencies in Arrays of Coupled Vortices

2011 ◽  
Vol 47 (6) ◽  
pp. 1610-1613 ◽  
Author(s):  
Andreas Vogel ◽  
André Drews ◽  
Mi-Young Im ◽  
Peter Fischer ◽  
Guido Meier
Keyword(s):  
Size Effect ◽  
Finite Size ◽  
Finite Size Effect ◽  
Resonance Frequencies

Ag–Mn nanoparticles: Three-dimensional finite size effect of the spin glass state

1999 ◽  
Vol 86 (11) ◽  
pp. 6571-6575 ◽  
Author(s):  
J. Ederth ◽  
A. Hoel ◽  
C. I. Johansson ◽  
L. B. Kiss ◽  
E. Olsson ◽  
...  
Keyword(s):  
Size Effect ◽  
Spin Glass ◽  
Three Dimensional ◽  
Finite Size ◽  
Spin Glass State ◽  
Finite Size Effect ◽  
Glass State
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