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|標題:||Thermal stability of Cu@Ag core–shell nanoparticles|
|摘要:||In this study, the structural evolution and oxidation of Cu@Ag core–shell nanoparticle deposits (withaverage particle diameter of 25 nm and Ag/Cu atomic ratio of 1/8) upon heating in air were investigatedquantitatively via in situ synchrotron radiation X-ray diffraction. With an increasing temperature, thecoalescence of Cu cores and ripening of Ag shell occurred simultaneously, resulting in discrete Ag nanonodulesand unprotected Cu microparticles. Due to the protection of the thin Ag shell, the formation temperaturesof the Cu oxides for Cu@Ag NPs were higher than those for pure Cu nanoparticles with similarsize by at least 150 C.|
|Appears in Collections:||材料科學與工程學系|
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