Synthesis of bio-functional nanoparticles from sono-responsive amino acids using high frequency ultrasound.
Sukhvir Kaur Bhangu, Muthupandian Ashokkumar, Francesca Cavalieri
Ultrasonics Sonochemistry | Elsevier | Published : 2020
A simple, one-pot high frequency ultrasonication (490 kHz) methodology to convert hydrophobic and amphipathic amino acids into nanostructures was investigated. The approach involved the oxidative coupling of aromatic amino acids (phenylalanine and tryptophan) in aqueous solutions to form high molecular weight dimers and oligomers. The role of cavitation bubble surface and ultrasonic power to trigger the out-of-equilibrium self-assembly of dimers and trimers to spherical and uniform nanostructures with controlled size has been discussed. The synthesized particles exhibited fluorescence in blue, green and red spectral regions and a strong antioxidant activity.
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Awarded by Australian Research Council
This work was supported by the Australian Research Council (ARC) under a Future Fellowship (F. Cavalieri, FT140100873). We acknowledge the University of Melbourne for their support through MRS scholarship.