Issue 27, 2010
From the journal:

Journal of Materials Chemistry

Structural and morphological features of concentric iron oxide/carbon nanotubes obtained from phospholipids

Min Yu,a   Jane Howe,b   Kyunghoon Jeong,c   Inbo Shim,d   Woochul Kim,d   Chulsung Kim,d   Jaepyoung Ahn,e   Jaegab Leec  and  Marek W. Urban*a  

* Corresponding authors

a School of Polymers and High Performance Materials, The University of Southern Mississippi, Hattiesburg, MS, USA

b Materials Science and Technology Division, Oak Ridge National Laboratory, Oak Ridge, TN, USA

c Center for Materials and Processes of Self-Assembly, 861-1 Jeongneung-dong, Seongbuk-gu, Seoul, Korea

d Department of Nano and Electronic Physics, Kookmin University, 861-1 Jeongneung-dong, Seongbuk-gu, Seoul, Korea

e Nano Material Analysis Center, Korea Institute of Science and Technology, 39-1 Hawolkok-dong, Seongbuk-gu, Seoul, Korea

Abstract

Biologically active 1,2-bis(10,12-tricosadiynoyl)-sn-glycero-3-phosphocholine (DC8,9PC) nanotube-forming phospholipids (PLs) have been utilized as templates to prepare ferromagnetic nanotubes (FMNTs). Combining X-ray diffraction (XRD), selected area electron diffraction (SAD), high-resolution transmission electron microscopy (HRTEM), Raman, and Mössbauer spectroscopy measurements, FMNTs morphological features and chemical composition were determined. These studies showed that FMNTs consist of iron oxide/carbon/iron oxide concentric nanotubes with the amorphous carbon phase sandwiched between two iron oxide layers. The iron oxide phase consists of nanocrystalline magnetite (Fe3O4) which coexist as tetrahedral Fe3+ and octahedral Fe2.5+ sites containing minute quantities of hematite (α-Fe2O3) phase. The carbon phase consists of amorphous carbon forming an amorphous carbon nanotube (ACNT). Magnetic measurements showed that saturation magnetization (Ms) of FMNTs is 79 emu/g, but upon removal of the iron oxide outer and inner layers, ACNTs become paramagnetic. The electrical resistivity (ρ) of single FMNT is 3.3 × 10−2 Ω·m, which decreases to 5.06 × 10−4 Ω·m for ACNT. These magneto-electric properties can be easily tailored, depending upon desired applications and needs.

Graphical abstract: Structural and morphological features of concentric iron oxide/carbon nanotubes obtained from phospholipids

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Article information

DOI
https://doi.org/10.1039/C0JM00753F
Article type
Paper
Submitted
18 Mar 2010
Accepted
06 May 2010
First published
07 Jun 2010

J. Mater. Chem., 2010,20, 5748-5755

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Structural and morphological features of concentric iron oxide/carbon nanotubes obtained from phospholipids

M. Yu, J. Howe, K. Jeong, I. Shim, W. Kim, C. Kim, J. Ahn, J. Lee and M. W. Urban, J. Mater. Chem., 2010, 20, 5748 DOI: 10.1039/C0JM00753F

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