Gold clusters on WO₃ nanoneedles grown via AACVD: XPS and TEM studies

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• 作者：Cristina Naví ; o^a ; Stella Vallejos^b ; ^c ; Toni Stoycheva^b ; Eduard Llobet^b ; Xavier Correig^b ; Rony Snyders^a ; Christopher Blackman^c ; Polona Umek^d ; Xiaoxing Ke^e ; Gustaaf Van Tendeloo^e ; Carla Bittencourt^e ; ^{carla.bittencourt@umons.ac.be}
• 关键词：AACVD ; Oxide nanostructures ; Gas sensing ; Gold clusters
• 刊名：Materials Chemistry and Physics
• 出版年：2012
• 期刊代码：58_02540584
• 类别：ms
• 出版时间：15 June, 2012
• 卷：134
• 期：2-3
• 页码：809-813
• 文件大小：923 K

摘要

We have prepared tungsten oxide films decorated with gold particles on Si substrates by aerosol assisted chemical vapor deposition (AACVD) and characterized them using scanning electron microscopy (SEM), transmission electron microscopy (TEM) and X-ray photoelectron spectroscopy (XPS). SEM shows that the films are composed of needle-like structures and TEM shows that both the needles and the gold particles are crystalline. XPS indicates the presence of oxygen vacancies, i.e. the films are WO_3鈭?em>x, and hence the deposited material is composed of semiconducting nanostructures and that the interaction between the gold particles and the WO₃ needles surface is weak. The synthesis of semiconducting tungsten oxide nanostructures decorated with metal particles represents an important step towards the development of sensing devices with optimal properties.