Virus-Templated Near-Amorphous Iron Oxide Nanotubes
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- 作者：Sachin N. Shah ; Abid A. Khan ; Ana Espinosa ; Miguel A. Garcia ; Wiwat Nuansing ; Mariana Ungureanu ; Jonathan G. Heddle ; Andrey L. Chuvilin ; Christina Wege ; Alexander M. Bittner
- 刊名：Langmuir
- 出版年：2016
- 出版时间：June 14, 2016
- 年：2016
- 卷：32
- 期：23
- 页码：5899-5908
- 全文大小：574K
- 年卷期：0
- ISSN：1520-5827
文摘
We present a simple synthesis of iron oxide nanotubes, grown under very mild conditions from a solution containing Fe(II) and Fe(III), on rod-shaped tobacco mosaic virus templates. Their well-defined shape and surface chemistry suggest that these robust bionanoparticles are a versatile platform for synthesis of small, thin mineral tubes, which was achieved efficiently. Various characterization tools were used to explore the iron oxide in detail: Electron microscopy (SEM, TEM), magnetometry (SQUID-VSM), diffraction (XRD, TEM-SAED), electron spectroscopies (EELS, EDX, XPS), and X-ray absorption (XANES with EXAFS analysis). They allowed determination of the structure, crystallinity, magnetic properties, and composition of the tubes. The protein surface of the viral templates was crucial to nucleate iron oxide, exhibiting analogies to biomineralization in natural compartments such as ferritin cages.