Publications by authors named "Yejoon Seo"
Crystalline organic semiconductors are known to have improved charge carrier mobility and exciton diffusion length in comparison to their amorphous counterparts. Certain organic molecular thin films can be transitioned from initially prepared amorphous layers to large-scale crystalline films via abrupt thermal annealing. Ideally, these films crystallize as platelets with long-range-ordered domains on the scale of tens to hundreds of microns.
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- Amorphous solid dispersions (ASDs) use the stable amorphous state to protect drugs within a polymer matrix, making the stability of the polymer crucial for ASD effectiveness.
- Researchers examined the physical aging of hydroxypropyl methylcellulose acetate succinate (HPMCAS), a common polymer for ASDs, finding it showed typical aging behavior at temperatures near its glass transition.
- They discovered that the aging rate decreased significantly below a certain temperature, and infrared spectroscopy revealed that physical aging may affect HPMCAS's chemical structure, which could lead to degradation at higher temperatures, highlighting the importance of understanding polymer stability in ASDs.