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TEM micrographs at high magnification show isolated nanoparticles with details in the morphology and nanostructure. TEM micrographs at low magnification show size and shape distribution of BSA-capsaicin nanoparticles at different capsaicin concentrations. All experiments in TEM were carried out at 80 kV high voltage (EHT) at 710,000× to 140,000× (high magnification), and at 8900× to 9000× (low magnification), working pressure 5 × 10−3 Pa (5 × 10−5 Torr).
