NANOPARTICLES Production of amorphous nanoparticles by supersonic spray-drying with a microfluidic nebulator

Amorphous nanoparticles (a-NPs) have physicochemical properties distinctly different from those of the corresponding bulk crystals; for example, their solubility is much higher. However, many materials have a high propensity to crystallize and are difficult to formulate in an amorphous structure without stabilizers. We fabricated a microfluidic nebulator that can produce amorphous NPs from a wide range of materials, even including pure table salt (NaCl). By using supersonic air flow, the nebulator produces drops that are so small that they dry before crystal nuclei can form. The small size of the resulting spray-dried a-NPs limits the probability of crystal nucleation in any given particle during storage. The kinetic stability of the a-NPs-on the order of months-is advantageous for hydrophobic drug molecules.


Publié dans:
Science, 349, 6251, 956-960
Année
2015
Publisher:
Washington, American Association for the Advancement of Science
ISSN:
0036-8075
Laboratoires:




 Notice créée le 2015-09-28, modifiée le 2018-09-13


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