Glass formation and confined melting in sol-gel derived nano-
ZnO aggregates

J 2014

Glass formation and confined melting in sol-gel derived nano- ZnO aggregates

TOSCANI, Siro, Olivier HERNANDEZ, Claudia APARICIO a Lubomír ŠPAŇHEL

Základní údaje

Originální název

Glass formation and confined melting in sol-gel derived nano- ZnO aggregates

Autoři

TOSCANI, Siro (380 Itálie), Olivier HERNANDEZ (250 Francie), Claudia APARICIO (604 Peru) a Lubomír ŠPAŇHEL (203 Česká republika, garant, domácí)

Vydání

Journal of Sol-Gel Science and Technology, Dordrecht, Springer Netherlands, 2014, 0928-0707

Další údaje

Jazyk

angličtina

Typ výsledku

Článek v odborném periodiku

Obor

10403 Physical chemistry

Stát vydavatele

Spojené státy

Utajení

není předmětem státního či obchodního tajemství

Odkazy

URL

Impakt faktor

Impact factor: 1.532

Kód RIV

RIV/00216224:14740/14:00075718

Organizační jednotka

Středoevropský technologický institut

DOI

http://dx.doi.org/10.1007/s10971-013-3184-5

UT WoS

000330975000029

Klíčová slova anglicky

Nanoparticles; Melting confinement; ZnO; Sol-gel glasses

Štítky

kontrola MP, rivok

Příznaky

Mezinárodní význam, Recenzováno

Změněno: 5. 9. 2014 13:23, Martina Prášilová

Anotace

V originále

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.

Návaznosti

ED1.1.00/02.0068, projekt VaV

Název: CEITEC - central european institute of technology

Citovat

TOSCANI, Siro, Olivier HERNANDEZ, Claudia APARICIO a Lubomír ŠPAŇHEL. Glass formation and confined melting in sol-gel derived nano- ZnO aggregates. Journal of Sol-Gel Science and Technology. Dordrecht: Springer Netherlands, 2014, roč. 69, č. 2, s. 457-463. ISSN 0928-0707. Dostupné z: https://dx.doi.org/10.1007/s10971-013-3184-5.

@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 a 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, roč.~69, č.~2, s.~457-463. ISSN~0928-0707. Dostupné z: https://dx.doi.org/10.1007/s10971-013-3184-5.

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