Synthesis of Curved CuIn1–xGax(S1–ySey)2 Nanocrystals and Complete Characterization of Their Diffraction Contrast Effects

Shalini Singh; Claudia Coughlan; Yina Guo; Shohei Nakahara; Kevin M. Ryan

doi:10.1021/acs.chemmater.8b04082

Synthesis of Curved CuIn1–xGax(S1–ySey)2 Nanocrystals and Complete Characterization of Their Diffraction Contrast Effects

Shalini Singh, Claudia Coughlan, Yina Guo, Shohei Nakahara, Kevin M. Ryan

Department of Chemical Sciences

University of Limerick

Research output: Contribution to journal › Article › peer-review

Abstract

Herein, we report the synthesis and complete structural characterization of curved CuIn_1-xGa_x(S_1-ySe_y)₂ (x = y = 0.5) nanocrystals, which adopt a two-dimensional (2D) nanoplate morphology and crystallize in the hexagonal wurtzite phase. A detailed transmission electron microscopy (TEM) analysis reveals that the 2D nanoplates are predominately [001]-oriented and exhibit a unique bend contour pattern, because of curvature on the (001) basal plane. The contrast behavior of bend contours in this system is further supported through specimen-tilting experiments inside TEM, in combination with dark-field imaging in both TEM and scanning TEM modes. This bending is believed to originate from the proximity effect of the top and bottom (001) surfaces.

Original language	English (Ireland)
Pages (from-to)	8679-8689
Number of pages	11
Journal	Chemistry of Materials
Volume	30
Issue number	23
DOIs	https://doi.org/10.1021/acs.chemmater.8b04082
Publication status	Published - 11 Dec 2018

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title = "Synthesis of Curved CuIn1–xGax(S1–ySey)2 Nanocrystals and Complete Characterization of Their Diffraction Contrast Effects",

abstract = "Herein, we report the synthesis and complete structural characterization of curved CuIn1-xGax(S1-ySey)2 (x = y = 0.5) nanocrystals, which adopt a two-dimensional (2D) nanoplate morphology and crystallize in the hexagonal wurtzite phase. A detailed transmission electron microscopy (TEM) analysis reveals that the 2D nanoplates are predominately [001]-oriented and exhibit a unique bend contour pattern, because of curvature on the (001) basal plane. The contrast behavior of bend contours in this system is further supported through specimen-tilting experiments inside TEM, in combination with dark-field imaging in both TEM and scanning TEM modes. This bending is believed to originate from the proximity effect of the top and bottom (001) surfaces.",

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AU - Guo, Yina

AU - Nakahara, Shohei

AU - Ryan, Kevin M.

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N2 - Herein, we report the synthesis and complete structural characterization of curved CuIn1-xGax(S1-ySey)2 (x = y = 0.5) nanocrystals, which adopt a two-dimensional (2D) nanoplate morphology and crystallize in the hexagonal wurtzite phase. A detailed transmission electron microscopy (TEM) analysis reveals that the 2D nanoplates are predominately [001]-oriented and exhibit a unique bend contour pattern, because of curvature on the (001) basal plane. The contrast behavior of bend contours in this system is further supported through specimen-tilting experiments inside TEM, in combination with dark-field imaging in both TEM and scanning TEM modes. This bending is believed to originate from the proximity effect of the top and bottom (001) surfaces.

AB - Herein, we report the synthesis and complete structural characterization of curved CuIn1-xGax(S1-ySey)2 (x = y = 0.5) nanocrystals, which adopt a two-dimensional (2D) nanoplate morphology and crystallize in the hexagonal wurtzite phase. A detailed transmission electron microscopy (TEM) analysis reveals that the 2D nanoplates are predominately [001]-oriented and exhibit a unique bend contour pattern, because of curvature on the (001) basal plane. The contrast behavior of bend contours in this system is further supported through specimen-tilting experiments inside TEM, in combination with dark-field imaging in both TEM and scanning TEM modes. This bending is believed to originate from the proximity effect of the top and bottom (001) surfaces.

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Synthesis of Curved CuIn1–xGax(S1–ySey)2 Nanocrystals and Complete Characterization of Their Diffraction Contrast Effects

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