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Simultaneous high-resolution scanning Bragg contrast and ptychographic imaging of a single solar cell nanowire
- Source :
- Journal of applied crystallography 48(6), 1818-1826 (2015). doi:10.1107/S1600576715017975, Journal of Applied Crystallography
- Publication Year :
- 2015
- Publisher :
- International Union of Crystallography (IUCr), 2015.
-
Abstract
- Simultaneous Bragg diffraction and coherent small-angle scattering of a single solar cell nanowire is demonstrated, using a nanofocused hard X-ray beam and two detectors.<br />Simultaneous scanning Bragg contrast and small-angle ptychographic imaging of a single solar cell nanowire are demonstrated, using a nanofocused hard X-ray beam and two detectors. The 2.5 µm-long nanowire consists of a single-crystal InP core of 190 nm diameter, coated with amorphous SiO2 and polycrystalline indium tin oxide. The nanowire was selected and aligned in real space using the small-angle scattering of the 140 × 210 nm X-ray beam. The orientation of the nanowire, as observed in small-angle scattering, was used to find the correct rotation for the Bragg condition. After alignment in real space and rotation, high-resolution (50 nm step) raster scans were performed to simultaneously measure the distribution of small-angle scattering and Bragg diffraction in the nanowire. Ptychographic reconstruction of the coherent small-angle scattering was used to achieve sub-beam spatial resolution. The small-angle scattering images, which are sensitive to the shape and the electron density of all parts of the nanowire, showed a homogeneous profile along the nanowire axis except at the thicker head region. In contrast, the scanning Bragg diffraction microscopy, which probes only the single-crystal InP core, revealed bending and crystalline inhomogeneity. Both systematic and non-systematic real-space movement of the nanowire were observed as it was rotated, which would have been difficult to reveal only from the Bragg scattering. These results demonstrate the advantages of simultaneously collecting and analyzing the small-angle scattering in Bragg diffraction experiments.
- Subjects :
- Materials science
Nanowire
Physics::Optics
02 engineering and technology
7. Clean energy
01 natural sciences
General Biochemistry, Genetics and Molecular Biology
Condensed Matter::Materials Science
Optics
0103 physical sciences
Microscopy
ptychography
Diffraction topography
010306 general physics
Wide-angle X-ray scattering
Scattering
business.industry
Bragg's law
021001 nanoscience & nanotechnology
Research Papers
Ptychography
X-ray diffraction
nanowires
solar cells
ddc:540
X-ray crystallography
0210 nano-technology
business
Subjects
Details
- ISSN :
- 16005767
- Volume :
- 48
- Database :
- OpenAIRE
- Journal :
- Journal of Applied Crystallography
- Accession number :
- edsair.doi.dedup.....f445a90d23069255d726bbbfd73965e7