Qu Yongquan, Masiel Daniel J, Cheng Neal N, Sutherland Alexander M, Carter Joshua D, Browning Nigel D, Guo Ting
Department of Chemistry, University of California, Davis, CA 95616, USA.
J Colloid Interface Sci. 2008 May 15;321(2):251-5. doi: 10.1016/j.jcis.2008.02.040. Epub 2008 Feb 29.
Cubically shaped cobalt oxide nanoparticle catalysts were used for the first time to investigate the melting of the nanoparticle catalysts responsible for the synthesis of silica nanocoils at 1050 degrees C and straight nanowires at 1100 degrees C. Cobalt nanoparticles remained morphologically highly anisotropic after the growth of nanocoils at 1050 degrees C, whereas they became predominately spherical after straight nanowires were made at 1100 degrees C. These results strongly indicated that cobalt nanoparticles responsible for the synthesis of straight nanowires were completely molten and that melting occurred to these nanoparticles between 1050 and 1100 degrees C.
首次使用立方体形氧化钴纳米颗粒催化剂来研究在1050℃合成二氧化硅纳米线圈以及在1100℃合成直纳米线的纳米颗粒催化剂的熔化情况。在1050℃纳米线圈生长后，钴纳米颗粒在形态上仍保持高度各向异性，而在1100℃制成直纳米线后，它们主要变成了球形。这些结果有力地表明，负责合成直纳米线的钴纳米颗粒完全熔化，且这些纳米颗粒在1050℃至1100℃之间发生了熔化。
