In Situ TEM Observation of a Microcrucible Mechanism of Nanowire Growth | Zendy

R.C. Boston | Zendy; Zoë Schnepp | Zendy; Y. Nemoto | Zendy; Yoshio Sakka | Zendy; Simon R. Hall | Zendy

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In Situ TEM Observation of a Microcrucible Mechanism of Nanowire Growth

Author(s) -

R.C. Boston,

Zoë Schnepp,

Y. Nemoto,

Yoshio Sakka,

Simon R. Hall

Publication year - 2014

Publication title -

science

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 12.556

H-Index - 1186

eISSN - 1095-9203

pISSN - 0036-8075

DOI - 10.1126/science.1251594

Subject(s) - nanowire , transmission electron microscopy , in situ , mechanism (biology) , materials science , substrate (aquarium) , nanotechnology , chemical engineering , chemistry , geology , physics , organic chemistry , quantum mechanics , engineering , oceanography

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.

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