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Titolo:
Size-dependent melting point depression of nanostructures: Nanocalorimetric measurements
Autore:
Zhang, M; Efremov, MY; Schiettekatte, F; Olson, EA; Kwan, AT; Lai, SL; Wisleder, T; Greene, JE; Allen, LH;
Indirizzi:
Univ Illinois, Mat Sci & Engn & Coordinated Sci Lab, Urbana, IL 61801 USA Univ Illinois Urbana IL USA 61801 ordinated Sci Lab, Urbana, IL 61801 USA
Titolo Testata:
PHYSICAL REVIEW B
fascicolo: 15, volume: 62, anno: 2000,
pagine: 10548 - 10557
SICI:
0163-1829(20001015)62:15<10548:SMPDON>2.0.ZU;2-8
Fonte:
ISI
Lingua:
ENG
Soggetto:
SMALL PARTICLES; FREEZING BEHAVIOR; HEAT-CAPACITY; CLUSTERS; INDIUM; TEMPERATURE; SENSITIVITY; NUCLEATION; METALS; GROWTH;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
--discip_EC--
Citazioni:
39
Recensione:
Indirizzi per estratti:
Indirizzo: Allen, LH Univ Illinois, Mat Sci & Engn & Coordinated Sci Lab, Urbana, IL 61801 USA Univ Illinois Urbana IL USA 61801 Sci Lab, Urbana, IL 61801 USA
Citazione:
M. Zhang et al., "Size-dependent melting point depression of nanostructures: Nanocalorimetric measurements", PHYS REV B, 62(15), 2000, pp. 10548-10557

Abstract

The melting behavior of 0.1-10-nm-thick discontinuous indium films formed by evaporation on amorphous silicon nitride is investigated by an ultrasensitive thin-film scanning calorimetry technique. The films consist of ensembles of nanostructures for which the size dependence of the melting temperature and latent heat of fusion are determined. The relationship between the nanostructure radius and the corresponding melting point and latent heat isdeduced solely from experimental results (i.e., with no assumed model) by comparing the calorimetric measurements to the particle size distributions obtained by transmission electron microscopy. It is shown that the melting point of the investigated indium nanostructures decreases as much as 110 K for particles with a radius of 2 nm. The experimental results are discussedin terms of existing melting point depression models. Excellent agreement with the homogeneous melting model is observed.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 23/09/20 alle ore 13:14:26