Synthesis and transport properties of La0.67Sr0.33MnO3 conformally-coated on carbon nanotubes

被引：15

作者：

Beltran-Huarac, Juan ^{[1
,2
]}

Caypena-Nunez, Jennifer ^{[2
]}

Barrionuevo, Danilo ^{[2
]}

Mendoza, Frank ^{[1
,2
]}

Katiyar, Rain S. ^{[1
,2
]}

Fonseca, Luis F. ^{[1
,2
]}

Weiner, Brad R. ^{[1
,3
]}

Morell, Gerardo ^{[1
,2
]}

机构：

[1] Univ Puerto Rico, Inst Funct Nanomat, Rio Piedras, PR 00931 USA

[2] Univ Puerto Rico, Dept Phys, San Juan, PR 00936 USA

[3] Univ Puerto Rico, Dept Chem, San Juan, PR 00936 USA

来源：

CARBON | 2013年 / 65卷

基金：

美国国家科学基金会;

关键词：

CURRENT-VOLTAGE CHARACTERISTICS; ELECTRICAL-TRANSPORT; NANOWIRES; NANOPARTICLES; CONDUCTIVITY; MANGANITES; EMISSION;

D O I：

10.1016/j.carbon.2013.08.023

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

We report for the first time the fabrication of nanostructured ferromagnetic lanthanum strontium manganite La0.67Sr0.33MnO3 (LSMO) conformally coated onto bamboo-like carbon nanotubes (BCNTs) by pulsed laser deposition. Scanning electron microscopy revealed that one-dimensional LSMO/BCNTs with diameters ranging from 100-160 nm and lengths over 10 mu m were obtained. Line-scanned energy-dispersive X-ray spectroscopy profiles, selected area electron diffraction rings, and energy-filtered transmission electron microscopy maps provided further insight into the hybrid nanostructures. LSMO/BCNT and BCNT were also investigated via in situ electrical probing in a transmission electron microscope using a piezo-driven scanning tunneling microscopy holder. Modeling of the I-V characteristics of individual hybrid nanotubes yielded the resistivity, bandgap, and electron density of LSMO and BCNT. The results show that the transport properties of LSMO/BCNT are superior to those of BCNT. This research advances the integration of oxide materials and carbon nanotubes, bringing forth new avenues for miniaturization and fabrication of one-dimensional core-multishell materials with multifunctional properties that can be used as building blocks in nanodevices. (C) 2013 Elsevier Ltd. All rights reserved.

引用

页码：252 / 260

页数：9

共 47 条

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