Transparent CoAl2O4 Hybrid Nano Pigment by Organic Ligand-Assisted Supercritical Water

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• 作者：Dinesh Rangappa ; Takashi Naka ; Akitsugu Kondo ; Masahiko Ishii ; Toshikatsu Kobayashi ; Tadafumi Adschiri
• 刊名：Journal of the American Chemical Society
• 出版年：2007
• 出版时间：September 12, 2007
• 年：2007
• 卷：129
• 期：36
• 页码：11061 - 11066
• 全文大小：368K
• 年卷期：v.129,no.36(September 12, 2007)
• ISSN：1520-5126

文摘

Transparent types of inorganic pigments are important as they can be used in a variety ofapplications, such as metallic finishing, contrast enhancing luminescent pigments, high-end optical filters,and so on. Currently, the difficulty in producing monodisperse and stable binary metal oxide nano pigmentsat low temperature hampers the applicability and realization of transparent blue nano pigments. Here, forthe first time, we report organic ligand capped CoAl₂O₄ hybrid transparent nano pigment, which has aparticle size less than 8 nm with well-stabilized single nanocrystals, using organic ligand-assisted supercriticalwater as the reaction medium. The organic ligand capping could effectively inhibit the particle growth andalso control the size of nanocrystals. This helps to diminish the scattering effect of the nano blue pigment,realizing a transparent cobalt blue nano pigment without any postheat treatment.