Hysteresis in the melting kinetics of Bi nanoparticles

Structural properties as a function of temperature of bismuth nanocrystals embedded in amorphous germanium thin films, synthesised by laser ablation are investigated by Raman spectroscopy and X-ray diffraction. In addition to temperature anharmonic effects, Raman spectroscopy results reveal a meltin...

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Bibliographic Details
Published inThin solid films Vol. 453-454; no. Complete; pp. 467 - 470
Main Authors Haro-Poniatowski, E., Serna, R., Afonso, C.N., Jouanne, M., Morhange, J.F., Bosch, P., Lara, V.H.
Format Journal Article
LanguageEnglish
Published Elsevier B.V 01.04.2004
Subjects
Bismuth
Laser ablation
Nanoparticles
Phase transitions
Raman
Nanoparticles
63.22
05.70.F
81.15.F
Bismuth
Raman
78.30
Laser ablation
44.50
Phase transitions
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Summary:Structural properties as a function of temperature of bismuth nanocrystals embedded in amorphous germanium thin films, synthesised by laser ablation are investigated by Raman spectroscopy and X-ray diffraction. In addition to temperature anharmonic effects, Raman spectroscopy results reveal a melting solidification hysteresis, which takes place below the melting point of bulk bismuth. Furthermore, preliminary X-ray diffraction results suggest that the nanocrystals change in structure upon heating until melting occurs. However, the nanocrystals recover their original structure once the sample is cooled at room temperature.
Bibliography:ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
content type line 23
ISSN:0040-6090
1879-2731
DOI:10.1016/j.tsf.2003.11.134