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. 2021 Aug 17;13(8):1278. doi: 10.3390/pharmaceutics13081278

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© 2021 by the authors.

Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).

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Raman spectra of (a) Raw Trehalose, SD Trehalose, Raw PNA5, SD PNA5, and co-SD PNA5:Trehalose (25:75). (b) Raman spectra for co-SD PNA5:Trehalose (25:75) at three spots with the powder’s microscopic images in each spot. Scale bar: 50 μm.