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Mechanism of catalyst diffusion on magnesium oxide nanowire growth
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10.1063/1.2768202
/content/aip/journal/apl/91/6/10.1063/1.2768202
http://aip.metastore.ingenta.com/content/aip/journal/apl/91/6/10.1063/1.2768202
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Figures

Image of FIG. 1.
FIG. 1.

FESEM images of MgO nanowires grown on MgO (100) single crystal substrate when varying the ambient oxygen pressure. The images are taken when the angle was tilted 60° to the substrate surface plane. The ambient oxygen pressures were (a) 0.01, (b) 0.1, (c) 1, and (d) .

Image of FIG. 2.
FIG. 2.

(Color online) Ambient pressure dependence on the length of MgO nanowires under oxygen and/or argon atmospheres. Each sample was deposited for . (a) The opened circles show the data for nanowires grown under oxygen atmosphere, and the closed circles represent the data under argon atmosphere. (b) Length distribution data of nanowires grown under oxygen atmosphere are shown. (c) Shows the EDS data of nanowires grown under of argon atmosphere.

Image of FIG. 3.
FIG. 3.

HRTEM images of MgO nanowires. (a) and (b) show the images of nanowires grown under oxygen atmosphere with the ambient pressures of (a) 10 and (b) , respectively. Image (c) is of nanowire grown under argon atmosphere with the ambient pressures of .

Image of FIG. 4.
FIG. 4.

(Color online) Time dependences on the nanowire length under different ambient oxygen pressures. Green squares show the data with the ambient pressure of , and the red circles are the data with the ambient pressure of . Inset: lower FESEM image shows the morphologies of nanowires grown for with the ambient pressure of , showing the disappearance of catalyst droplet and the sidewall growth. The upper FESEM image displays the nanowire morphologies grown for with the ambient pressure of , showing long nanowires up to .

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/content/aip/journal/apl/91/6/10.1063/1.2768202
2007-08-06
2014-04-24
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Mechanism of catalyst diffusion on magnesium oxide nanowire growth
http://aip.metastore.ingenta.com/content/aip/journal/apl/91/6/10.1063/1.2768202
10.1063/1.2768202
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