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六角形和立方形CoO纳米晶体的阶段和大小控制合成

Won Seok Seo¹, Jae Ha Shim, Sang Jun Oh

¹National Research Laboratory, Department of Chemistry and School of Molecular Science (BK 21), Korea Advanced Institute of Science and Technology, Daejeon, 305-701, Korea.

Journal of the American Chemical Society

|April 28, 2005

概括

研究人员通过热分解合成了具有六角和立方相的受控氧化物 (CoO) 纳米晶体. 通过调整前体度和反应温度来调整晶体大小和相位.

科学领域:

材料科学材料科学材料科学
纳米技术纳米技术
无机化学无机化学

背景情况:

控制纳米晶体的相位和大小对于它们的特性至关重要.
氧化物 (CoO) 纳米晶体对各种应用具有兴趣.
以前的CoO合成方法缺乏精确的相位和尺寸控制.

研究的目的:

开发一种合成高晶度,相位和大小受控的CoO纳米晶体的方法.
研究动力学和热力学控制对纳米晶体形成的影响.
为了证明CoO纳米晶体大小的可调性.

主要方法:

(III) 乙乙酸 (Co (acac) 3) 在烯中热分解.
在惰性大气中进行合成.
改变前体度和反应温度以控制尺寸和相位.

主要成果:

成功合成了具有六角和立方相的高度晶体CoO纳米晶体.
证明了在较高温度下动力和热力学控制会导致明显的六角和立方相种子.
表明,通过调整前体度和反应温度,可以轻松操纵两种CoO相的晶体大小.

结论:

已经建立了一种可靠的方法来生产控制相位和大小的CoO纳米晶体.
合成路线提供了一条为特定应用量身定制CoO纳米晶体属性的途径.
这些发现提供了通过动力学和热力学因素控制纳米晶体形成的见解.

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