製備具形狀控制的氧化亞銅包銀包金核殼結構並探討其晶面光學及光熱性質

楊恭洵

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製備具形狀控制的氧化亞銅包銀包金核殼結構並探討其晶面光學及光熱性質

Synthesis of shape-controlled Au@Ag–Cu2O core–shell nanostructures and the examination of their facet-dependent optical and photothermal properties

楊恭洵 , Masters　　Advisor：黃暄益　　

英文

晶面性質；核殼結構；光學性質；光熱效應；形狀控制； facet-dependent property ； core-shell structure ； optical property ； photothermal effect ； shape-controlled

Abstract │ Reference (28) │ Altmetrics

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This study examines the facet-dependent optical properties of size-tunable Ag–Cu2O core–shell nanocrystals with 38, 42, and 50 nm cubic Ag cores.  The Ag cores were prepared from octahedral Au seeds.  The Cu2O shells are single-crystalline.  In the case of Au@Ag–Cu2O nanocrystals with 42 nm Ag cores, the Ag surface plasmon resonance (SPR) absorption band at 485 nm has been widely red-shifted to 730, 755, and 775 nm for rhombic dodecahedra, truncated octahedra, and cuboctahedra, respectively, after forming the Cu2O shells.  The Ag SPR band positions are mostly fixed despite large changes in the shell thickness, showing the presence of facet-dependent optical properties.  Due to the strong Ag SPR band absorption, all samples exhibit a better photothermal activity than that of Au–Cu2O nanocrystals.  Facet-dependent heat transmission may be present for particles with Ag SPR band much deviated from the laser wavelength, but this phenomenon is lost for particles with SPR band approaching the excitation wavelength as the particles become highly photothermally efficient to give solution temperatures of 80–95 ºC within 3 min of laser irradiation.

Reference ( 28 ) 〈TOP〉

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連結：
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連結：
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連結：
9.Wang, H. J.; Yang, K. H.; Hsu, S. C.; Huang, M. H., Nanoscale 2016, 8, 965-972.
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