Microstructure evolution of a Cu and θ-AI2O3 composite observed by aberration corrected HAADF-STEM

Yu, Zhiyang; Kracum, Michael; Kundu, Animesh; Chan, Helen M.; Harmer, Martin P.

doi:10.1017/s1431927615007540

Cited by 1 publication

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“…Those thin films were examined by a Talos F200S scanning/ transmission electron microscope (Thermal Fisher Scientific). Here, instead of conventional TEM, an incoherent imaging method 58,59 (HAADF) was applied to reveal the texture of the aligned thin films. EDS maps were acquired under a high electron beam current (spot size 6).…”

Section: Methodsmentioning

confidence: 99%

Nanocombing Effect Leads to Nanowire-Based, in-Plane, Uniaxial Thin Films

You

et al. 2018

ACS Nano

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The fabrication of thin films comprising ordered nanowire assemblies with emerging, precisely defined properties and adjustable functionalities enables highly integrated technologies in the fields of microelectronics and micro system technology, as well as for efficient power generation, storage, and utilization. Shear force, theoretically, is deemed the most promising method for obtaining in-plane, uniaxial thin films comprising nanowires. The success depends largely on the assembly process, and uniform structural control throughout multiple length scales can be achieved only if a rational strategy is executed. Here, we report that in shearing processes dopants such as lyotropic cellulose nanorods can give rise to the uniaxial alignment of V2O5·nH2O nanowires. Our systematic study indicates that this finding, namely, the nanocombing effect, can be a general principle for the continuous production of uniaxial thin films comprising densely packed nanowires varying in chemical composition and aspect ratios. Conversion of the V2O5·nH2O constituents via in situ oxidative polymerization leads to in-plane, uniaxial polyaniline (PANI) thin films with anisotropic electric and optical properties, which are otherwise difficult to fabricate due to the poor processability of PANI. The uniaxial PANI thin films can be utilized to fabricate flexible gas sensors for distinguishing various analytes, including similar homologues such as methanol and ethanol. We expect the methodology to be applied to a broad spectrum of synthetic and biogenic nanowires for the integration of their collective properties in high-performance electronic devices.

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Section: Methodsmentioning

confidence: 99%

Nanocombing Effect Leads to Nanowire-Based, in-Plane, Uniaxial Thin Films

You

et al. 2018

ACS Nano

View full text Add to dashboard Cite

show abstract

Microstructure evolution of a Cu and θ-AI2O3 composite observed by aberration corrected HAADF-STEM

Cited by 1 publication

References 4 publications

Nanocombing Effect Leads to Nanowire-Based, in-Plane, Uniaxial Thin Films

Nanocombing Effect Leads to Nanowire-Based, in-Plane, Uniaxial Thin Films

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