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@article{1186178,
author = {Toscani, Siro and Hernandez, Olivier and Aparicio, Claudia and Špaňhel, Lubomír},
article_location = {Dordrecht},
article_number = {2},
doi = {http://dx.doi.org/10.1007/s10971-013-3184-5},
keywords = {Nanoparticles; Melting confinement; ZnO; Sol-gel glasses},
language = {eng},
issn = {0928-0707},
journal = {Journal of Sol-Gel Science and Technology},
title = {Glass formation and confined melting in sol-gel derived nano- ZnO aggregates},
url = {http://link.springer.com/article/10.1007%2Fs10971-013-3184-5#page-7},
volume = {69},
year = {2014}
}
TY - JOUR
ID - 1186178
AU - Toscani, Siro - Hernandez, Olivier - Aparicio, Claudia - Špaňhel, Lubomír
PY - 2014
TI - Glass formation and confined melting in sol-gel derived nano- ZnO aggregates
JF - Journal of Sol-Gel Science and Technology
VL - 69
IS - 2
SP - 457-463
EP - 457-463
PB - Springer Netherlands
SN - 09280707
KW - Nanoparticles
KW - Melting confinement
KW - ZnO
KW - Sol-gel glasses
UR - http://link.springer.com/article/10.1007%2Fs10971-013-3184-5#page-7
L2 - http://link.springer.com/article/10.1007%2Fs10971-013-3184-5#page-7
N2 - Sol-gel processing of ZnO nanocolloids has been revisited to prepare various alkaline metal acetate (MAc: K, Na, Li-acetates) containing ZnO nanopowders. Using differential scanning calorimetry and X-ray diffraction investigations, several new relationships between the morphology and the thermodynamic behavior in the aforementioned particulate ZnO/MAc nanocomposites were noticed: (1) large MAc melting depression shifts -DTm * 80 C due to salt confinement within porous ZnO aggregates, (2) corresponding MAc crystallization and re-crystallization temperature depression shifts, (3) presence of multimodal pore size distributions within nanoaggregates and (4) glass formation at temperatures Tg between -40 and 130 C. We also note that the Tg value drops with rising alkaline metal size, increasing water content and decreasing ZnO particle size. In contrast, Tg rises in the case of co-doped Fe-LiAc/ZnO compositions.
ER -
TOSCANI, Siro, Olivier HERNANDEZ, Claudia APARICIO and Lubomír ŠPAŇHEL. Glass formation and confined melting in sol-gel derived nano- ZnO aggregates. \textit{Journal of Sol-Gel Science and Technology}. Dordrecht: Springer Netherlands, 2014, vol.~69, No~2, p.~457-463. ISSN~0928-0707. Available from: https://dx.doi.org/10.1007/s10971-013-3184-5.
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