TY  - JOUR
A1  - Dzhigaev, D.
A1  - Shabalin, A.
A1  - Stankevic, T.
A1  - Lorenz, Ulf
A1  - Kurta, R. P.
A1  - Seiboth, F.
A1  - Wallentin, J.
A1  - Singer, A.
A1  - Lazarev, S.
A1  - Yefanov, O. M.
A1  - Borgstrom, M.
A1  - Strikhanov, M. N.
A1  - Samuelson, L.
A1  - Falkenberg, G.
A1  - Schroer, C. G.
A1  - Mikkelsen, A.
A1  - Vartanyants, I. A.
T1  - Bragg coherent x-ray diffractive imaging of a single indium phosphide nanowire
JF  - Journal of optics
N2  - Three-dimensional (3D) Bragg coherent x-ray diffractive imaging (CXDI) with a nanofocused beam was applied to quantitatively map the internal strain field of a single indium phosphide nanowire. The quantitative values of the strain were obtained by pre-characterization of the beam profile with transmission ptychography on a test sample. Our measurements revealed the 3D strain distribution in a region of 150 nm below the catalyst Au particle. We observed a slight gradient of the strain in the range of +/- 0.6% along the [111] growth direction of the nanowire. We also determined the spatial resolution in our measurements to be about 10 nm in the direction perpendicular to the facets of the nanowire. The CXDI measurements were compared with the finite element method simulations and show a good agreement with our experimental results. The proposed approach can become an effective tool for in operando studies of the nanowires.
KW  - Bragg coherent x-ray diffractive imaging
KW  - InP nanowires
KW  - strain field
Y1  - 2016
U6  - https://doi.org/10.1088/2040-8978/18/6/064007
SN  - 2040-8978
SN  - 2040-8986
VL  - 18
PB  - IOP Publ. Ltd.
CY  - Bristol
ER  - 
TY  - JOUR
A1  - Sulyanova, Elena A.
A1  - Shabalin, Anatoly
A1  - Zozulya, Alexey V.
A1  - Meijer, Janne-Mieke
A1  - Dzhigaev, Dmitry
A1  - Gorobtsov, Oleg
A1  - Kurta, Ruslan P.
A1  - Lazarev, Sergey
A1  - Lorenz, Ulf
A1  - Singer, Andrej
A1  - Yefanov, Oleksandr
A1  - Zaluzhnyy, Ivan
A1  - Besedin, Ilya
A1  - Sprung, Michael
A1  - Petukhov, Andrei V.
A1  - Vartanyants, Ivan A.
T1  - Structural Evolution of Colloidal Crystal Films in the Process of Melting Revealed by Bragg Peak Analysis
JF  - Langmuir
N2  - In situ X-ray diffraction studies of structural evolution of colloidal crystal films formed by polystyrene spherical particles upon incremental heating are reported. The Bragg peak parameters, such as peak position, integrated intensity, and radial and azimuthal widths were analyzed as a function of temperature. A quantitative study of colloidal crystal lattice distortions and mosaic spread as a function of temperature was carried out using Williamson-Hall plots based on mosaic block model. The temperature dependence of the diameter of polystyrene particles was obtained from the analysis of Bragg peaks, and the form factor contribution extracted from the diffraction patterns. Four stages of structural evolution in a colloidal crystal upon heating were identified. Based on this analysis, a model of the heating and melting process in the colloidal crystal film is suggested.
Y1  - 2015
U6  - https://doi.org/10.1021/la504652z
SN  - 0743-7463
VL  - 31
IS  - 19
SP  - 5274
EP  - 5283
PB  - American Chemical Society
CY  - Washington
ER  -