Tailored Vapor-Phase Growth of CuxO鈥揟iO2 (x = 1, 2) Nanomaterials Decorated with Au Particles

详细信息    查看全文

• 作者：Davide Barreca ; Giorgio Carraro ; Alberto Gasparotto ; Chiara Maccato ; Oleg I. Lebedev ; Anna Parfenova ; Stuart Turner ; Eugenio Tondello ; Gustaaf Van Tendeloo
• 刊名：Langmuir
• 出版年：2011
• 出版时间：May 17, 2011
• 年：2011
• 卷：27
• 期：10
• 页码：6409-6417
• 全文大小：1097K
• 年卷期：v.27,no.10(May 17, 2011)
• ISSN：1520-5827

文摘

We report on the fabrication of Cu_xO鈥揟iO₂ (x = 1, 2) nanomaterials by an unprecedented vapor-phase approach. The adopted strategy involves the growth of porous Cu_xO matrices by means of chemical vapor deposition (CVD), followed by the controlled dispersion of TiO₂ nanoparticles. The syntheses are performed on Si(100) substrates at temperatures of 400鈥?50 掳C under wet oxygen atmospheres, adopting Cu(hfa)₂路TMEDA (hfa =1,1,1,5,5,5-hexafluoro-2,4-pentanedionate; TMEDA = N,N,N鈥?N鈥?tetramethylethylenediamine) and Ti(O-ⁱPr)₂(dpm)₂ (O-ⁱPr = isopropoxy; dpm = 2,2,6,6-tetramethyl-3,5-heptanedionate) as copper and titanium precursors, respectively. Subsequently, finely dispersed gold nanoparticles are introduced in the as-prepared systems via radio frequency (RF)-sputtering under mild conditions. The synthesis process results in the formation of systems with chemical composition and nano-organization strongly dependent on the nature of the initial Cu_xO matrix and on the deposited TiO₂ amount. The decoration with low-size gold clusters paves the way to the engineering of hierarchically organized nanomaterials.