In Situ TEM Observation of a Microcrucible Mechanism of Nanowire Growth

Rebecca Boston; Zoe Schnepp; Yoshihiro Nemoto; Yoshio Sakka; Simon R. Hall

doi:10.1126/science.1251594

In Situ TEM Observation of a Microcrucible Mechanism of Nanowire Growth

Rebecca Boston, Zoe Schnepp, Yoshihiro Nemoto, Yoshio Sakka, Simon R. Hall^*

^*Corresponding author for this work

Research output: Contribution to journal › Article (Academic Journal) › peer-review

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Abstract

The growth of metal oxide nanowires can proceed via a number of mechanisms such as screw dislocation, vapor-liquid-solid process, or seeded growth. Transmission electron microscopy (TEM) can resolve nanowires but invariably lacks the facility for direct observation of how nanowires form. We used a transmission electron microscope equipped with an in situ heating stage to follow the growth of quaternary metal oxide nanowires. Video-rate imaging revealed barium carbonate nanoparticles diffusing through a porous matrix containing copper and yttrium oxides to subsequently act as catalytic sites for the outgrowth of Y2BaCuO5 nanowires on reaching the surface. The results suggest that sites on the rough surface of the porous matrix act as microcrucibles and thus provide insights into the mechanisms that drive metal oxide nanowire growth at high temperatures.

Original language	English
Pages (from-to)	623-626
Number of pages	4
Journal	Science
Volume	344
Issue number	6184
DOIs	https://doi.org/10.1126/science.1251594
Publication status	Published - 9 May 2014

Keywords

SUPERCONDUCTOR NANOWIRES
WHISKERS
ARRAYS
WALL
GELS

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This is the author’s version of the work. It is posted here by permission of the AAAS for personal use, not for redistribution. The definitive version was published in Science, Vol. 344 no. 6184, 09/05/2014. DOI: 10.1126/science.1251594
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title = "In Situ TEM Observation of a Microcrucible Mechanism of Nanowire Growth",

abstract = "The growth of metal oxide nanowires can proceed via a number of mechanisms such as screw dislocation, vapor-liquid-solid process, or seeded growth. Transmission electron microscopy (TEM) can resolve nanowires but invariably lacks the facility for direct observation of how nanowires form. We used a transmission electron microscope equipped with an in situ heating stage to follow the growth of quaternary metal oxide nanowires. Video-rate imaging revealed barium carbonate nanoparticles diffusing through a porous matrix containing copper and yttrium oxides to subsequently act as catalytic sites for the outgrowth of Y2BaCuO5 nanowires on reaching the surface. The results suggest that sites on the rough surface of the porous matrix act as microcrucibles and thus provide insights into the mechanisms that drive metal oxide nanowire growth at high temperatures.",

keywords = "SUPERCONDUCTOR NANOWIRES, WHISKERS, ARRAYS, WALL, GELS",

author = "Rebecca Boston and Zoe Schnepp and Yoshihiro Nemoto and Yoshio Sakka and Hall, {Simon R.}",

year = "2014",

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T1 - In Situ TEM Observation of a Microcrucible Mechanism of Nanowire Growth

AU - Boston, Rebecca

AU - Schnepp, Zoe

AU - Nemoto, Yoshihiro

AU - Sakka, Yoshio

AU - Hall, Simon R.

PY - 2014/5/9

Y1 - 2014/5/9

N2 - The growth of metal oxide nanowires can proceed via a number of mechanisms such as screw dislocation, vapor-liquid-solid process, or seeded growth. Transmission electron microscopy (TEM) can resolve nanowires but invariably lacks the facility for direct observation of how nanowires form. We used a transmission electron microscope equipped with an in situ heating stage to follow the growth of quaternary metal oxide nanowires. Video-rate imaging revealed barium carbonate nanoparticles diffusing through a porous matrix containing copper and yttrium oxides to subsequently act as catalytic sites for the outgrowth of Y2BaCuO5 nanowires on reaching the surface. The results suggest that sites on the rough surface of the porous matrix act as microcrucibles and thus provide insights into the mechanisms that drive metal oxide nanowire growth at high temperatures.

AB - The growth of metal oxide nanowires can proceed via a number of mechanisms such as screw dislocation, vapor-liquid-solid process, or seeded growth. Transmission electron microscopy (TEM) can resolve nanowires but invariably lacks the facility for direct observation of how nanowires form. We used a transmission electron microscope equipped with an in situ heating stage to follow the growth of quaternary metal oxide nanowires. Video-rate imaging revealed barium carbonate nanoparticles diffusing through a porous matrix containing copper and yttrium oxides to subsequently act as catalytic sites for the outgrowth of Y2BaCuO5 nanowires on reaching the surface. The results suggest that sites on the rough surface of the porous matrix act as microcrucibles and thus provide insights into the mechanisms that drive metal oxide nanowire growth at high temperatures.

KW - SUPERCONDUCTOR NANOWIRES

KW - WHISKERS

KW - ARRAYS

KW - WALL

KW - GELS

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DO - 10.1126/science.1251594

M3 - Article (Academic Journal)

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ER -

In Situ TEM Observation of a Microcrucible Mechanism of Nanowire Growth

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