期刊
MATERIALS LETTERS
卷 62, 期 21-22, 页码 3727-3729出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.matlet.2008.04.035
关键词
hollow particle; Escherichia coli; template; silica
Inorganic hollow particles have attracted great interest in recent years due to their unique physico-chemical properties, as well as their potential use in various applications. In this study, we attempted to fabricate hollow particles using a gram-negative bacterium, Escherichia coli, as a biological template. Silica was synthesized by the hydrolysis of tetraethyl orthosilicate (TEOS) in the presence of ammonia following the Stober process. Silica was smoothly coated to the surface of the bacterial cells. The bacterial template could be removed by calcining at 600 degrees C. Interestingly, the calcinated particles retained the morphology of the biological cells even though the template was removed. This result indicates that this bacteria template technique enables the synthesis of hollow spheres, rods, wires, and other three-dimensional structures which retain the morphology of the original bacterium. (C) 2008 Elsevier B.V. All rights reserved.
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