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Morphology impact on the upconverted luminescence of ZnO:Er 3+ nanocrystals was studied with controllable morphology of nanorod, prickly sphere-like, column-like, branch rod, prism-like, and grain-like, prepared via the cetyltrimethylammonium bromide (CTAB)-assisted hydrothermal process. The upconversion emission of Er 3+ with 980nm excitation demonstrated morphology sensitivity which...
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