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000632985 1001_ $$0P:(DE-H253)PIP1115145$$aGomes Ferreira, Matheus$$b0
000632985 245__ $$aSelf-Assembly of Quantum-Confined CsPbBr3 PerovskiteNanocrystals into Rhombic, Frame, and RectangularSuperlattices
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000632985 520__ $$aSuperlattices of quantum-confined perovskite nanocrystals (5–6 nm) present an interesting example of colloidal crystals because of the interplay between nanoscopic parameters (nanocrystal sizes, shapes, and colloidal softness) and the microscopic shapes of their assemblies. These superlattices are reported as rectangular or rhombic, with little discussion of the outcomes of self-assembly experiments which are worthwhile to study given the rising interest in the optical properties of these nanomaterials. It is observed that various super-lattice shapes are produced in a single solvent evaporation experiment from a nanocrystal dispersion drop-casted onto a tilted substrate. The observed shapes are categorized as rhombi, rectangles, and hollow frames (including hollow rectangular frames, nested structures, and interconnected fragments).The influence of self-assembly conditions is studied by optical microscopy, and the nanocrystal circularity, aspect ratio, and size are quantified by transmission electron microscopy with additional insights into the superlattice structure provided by X-ray nano-diffraction. The results suggest that rhombic shapes arise from a subpopulation of nanocrystals with broader size and shape dispersions, whereas more uniform nanocrystals form rectangular structures(either solid or hollow). The solvent evaporation dynamics and diffusion of the drying liquid contribute to forming more complex shapes, such as nested frames and cracked and multidomain superlattices.
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000632985 7001_ $$0P:(DE-HGF)0$$aGastin, Baptiste$$b1
000632985 7001_ $$0P:(DE-HGF)0$$aHiller, Jonas$$b2
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000632985 7001_ $$0P:(DE-H253)PIP1102078$$aHinsley, Gerard$$b4
000632985 7001_ $$0P:(DE-H253)PIP1081817$$aWang, Bihan$$b5
000632985 7001_ $$0P:(DE-H253)PIP1102996$$aNgoi, Kuan Hoon$$b6
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000632985 7001_ $$0P:(DE-H253)PIP1023788$$aScheele, Marcus$$b9
000632985 7001_ $$0P:(DE-HGF)0$$aBaranov, Dmitry$$b10$$eCorresponding author
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