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Nanoparticles (A), close up of theophylline nanoparticles (B), theophylline controlled agglomerates (C), close up of theophylline controlled agglomerates (D), aggregation of theophylline nanoparticles upon using high concentration of NaCl (E), and theophylline powder without processing (F). Note the circles that showing the mechanism of self-assembly of nanorods on a copper grid. The arrows show fluffy spherical nanorods of the controlled agglomerates.
