Fabrication of Barbed-Shaped SnO@SnO2 Core/Shell Nanowires

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• 作者：Aru虆nas Jagminas ; Francisco M. Morales ; Kestutis Maz虒eika ; Giulio P. Veronese ; Jonas Reklaitis ; Juan G. Lozano ; Jose虂 M. Ma虂nuel ; Rafael Garci虂a ; Marija Kurtinaitiene虈 ; Remigijus Jus虒ke虈nas ; Dalis Baltru虆nas
• 刊名：Journal of Physical Chemistry C
• 出版年：2011
• 出版时间：March 24, 2011
• 年：2011
• 卷：115
• 期：11
• 页码：4495-4501
• 全文大小：992K
• 年卷期：v.115,no.11(March 24, 2011)
• ISSN：1932-7455

文摘

The interest in core/shell nanowires (Nws) is stimulated by the importance of fabricating materials possessing unique magnetic, catalytic, or optical properties relative to ones of their bulk parents. Here, the fabrication of a novel design of core鈭抯hell SnO@SnO₂ Nws via heat treatment of Sn Nws, fully encapsulated inside the pores of alumina matrix, is demonstrated. Under this scenario, densely packed arrays of barbed-shaped Nws, possessing extremely high surface areas, have been fabricated. ¹¹⁹Sn M枚ssbauer effect spectroscopy, high-resolution transmission electron microscopy (HRTEM), field-emission scanning electron microscopy (FESEM), and X-ray diffraction spectroscopy (XRD) were used to study the morphology and composition of the end-products. In addition, electron energy-loss spectroscopy (EELS) was successfully applied here to detect the ionization edges of tin and oxygen in the core and shell part of single Nw.