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 and Lubomír ŠPAŇHEL

Basic information

Original name

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

Authors

TOSCANI, Siro (380 Italy), Olivier HERNANDEZ (250 France), Claudia APARICIO (604 Peru) and Lubomír ŠPAŇHEL (203 Czech Republic, guarantor, belonging to the institution)

Edition

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

Other information

Language

English

Type of outcome

Článek v odborném periodiku

Field of Study

10403 Physical chemistry

Country of publisher

United States of America

Confidentiality degree

není předmětem státního či obchodního tajemství

References:

URL

Impact factor

Impact factor: 1.532

RIV identification code

RIV/00216224:14740/14:00075718

Organization unit

Central European Institute of Technology

DOI

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

UT WoS

000330975000029

Keywords in English

Nanoparticles; Melting confinement; ZnO; Sol-gel glasses

Abstract

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.

Links

ED1.1.00/02.0068, research and development project

Name: CEITEC - central european institute of technology

Citovat

TOSCANI, Siro, Olivier HERNANDEZ, Claudia APARICIO and 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, vol. 69, No 2, p. 457-463. ISSN 0928-0707. Available from: 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 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.

Detailed Information on Publication Record