Replacing microplastics (IMAGE)
Caption
These scanning electron microscope images show silk-coated microcapsules containing vitamin C, at different scales of detail. On the left, and top center, samples made by spray drying, a method already widely used in industry. On the right and at bottom center, samples made by ultrasonic spray freeze drying, a method used by the researchers to reveal greater detail of the process involved.
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Credits:SEM images by Muchun Liu, edited by MIT News
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