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(a) HRTEM image along the [010] zone axis, (b) HRTEM image along the [100] zone axis, and (c) HRTEM image of a twined structure for the SnS film deposited at 445 °C. FFT images are shown as insets. The yellow dash lines in part c depict a twin boundary (which were observed occasionally in SnS films), and the green dash line in the image denotes a grain boundary.
