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Quality of epitaxial InAs nanowires controlled by catalyst size in molecular beam epitaxy
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10.1063/1.4818682
/content/aip/journal/apl/103/7/10.1063/1.4818682
http://aip.metastore.ingenta.com/content/aip/journal/apl/103/7/10.1063/1.4818682
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Figures

Image of FIG. 1.
FIG. 1.

SEM image showing Au-catalyzed one-dimensional InAs nanowires. The inset is a magnified image of two nanowires with different diameters.

Image of FIG. 2.
FIG. 2.

TEM images of a thick InAs nanowire with a faceted catalyst. (a) A bright-field TEM image. (b) Nanowire top section with the faceted catalyst. (c) SAED pattern taken from the top of the nanowire and catalyst. (d) EDS spectra taken from the faceted catalyst and its underlying nanowire. (e) A typical high-resolution TEM image taken from the middle of InAs nanowire from marked region in (a).

Image of FIG. 3.
FIG. 3.

TEM images of a thin InAs nanowire with a hemisphere shaped catalyst. (a) A bright-field TEM image. (b) Nanowire top section with the hemisphere shaped catalyst. (c) SAED pattern taken from the top of the nanowire and catalyst. (d) EDS spectra taken from the catalyst and its underlying nanowire. (e) A typical high-resolution TEM image taken at the middle of nanowire, marked in (a).

Image of FIG. 4.
FIG. 4.

Schematic illustrating the growth mechanism of InAs nanowires induced by Au catalysts with different sizes and compositions. The smaller hemisphere catalysts contain a high In concentration that induce defect-free InAs nanowires, and the larger faceted catalysts contain a low In concentration that induce defected InAs nanowires.

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/content/aip/journal/apl/103/7/10.1063/1.4818682
2013-08-13
2014-04-16
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Quality of epitaxial InAs nanowires controlled by catalyst size in molecular beam epitaxy
http://aip.metastore.ingenta.com/content/aip/journal/apl/103/7/10.1063/1.4818682
10.1063/1.4818682
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