Surfactant-assisted hollowing of cu nanoparticles involving halide-induced corrosion-oxidation processes

研究成果: Article同行評審

38 引文 斯高帕斯(Scopus)

摘要

We have demonstrated a simple fabrication of hollow nanoparticles by halide-induced corrosion oxidation with the aid of surfactants. Cuprous oxide Cu2O nanoshells can be generated by simply mixing Cu nanoparticles with alkyltrimethylammonium halides at 55°C for 16 min. The hollowing mechanism proposed is that absorption of surfactants onto the Cu surface facilitates the formation of the void interior through an oxidative etching process. Upon extending the reaction up to 4 h. fragmentation, oxidation, and self-assembly were observed and the CuO ellipsoidal structures were formed. The headgroup lengths of the surfactants influenced the degree of CuO ellipsoidal formation, whereby longer surfactants favored the generation of ellipsoids. Optical absorption measured by UV-visible spectroscopy was used to monitor both oxidation courses of Cu→Cu2O and Cu2O→CuO and to determine the band-gap energies as 2.4 eV for Cu2O nanoshells and 1.89 eV for CuO ellipsoids. For the contact-angle measurements, the wettability changed from hydrophilicity (18°) to hydrophobicity (140°) as the Cu2O nanoshells shifted to CuO ellipsoids.

原文English
頁(從 - 到)3805-3810
頁數6
期刊Chemistry - A European Journal
12
發行號14
DOIs
出版狀態Published - 2006 五月 3

All Science Journal Classification (ASJC) codes

  • 化學 (全部)

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