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Impact of Different Morphological Structures on Physical Properties of Nanostructured SnSe

Nanostructured SnSe samples with specific morphologies like rods, rod-flowers, flakes, and flake-flowers were synthesized using the same reactants but with a control over various growth parameters involved in a hydrothermal reaction process. The morphology and detailed microstructure of the obtained samples have been studied by means of field-emission scanning electron microscopy (FE SEM) and high resolution transmission electron microscopy (HR-TEM). The sample quality, homogeneity, and phase purity have been thoroughly studied by selective area electron diffraction (SAED) and X-ray diffraction (XRD) analysis. Crystal structure study by refinement of powder XRD profiles using the least-squares fitting strategy indicates all samples to be pure single phase and provides its lattice parameters. The impact of changing morphology on the electrical, optical, and sensing properties of SnSe has been systematically evaluated. Temperature dependent electrical transport measurements highlight the increasingly 2D nat...