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Experimental study demonstrates shape-based sorting of gold nanostars in sucrose density gradients, indicating an effective approach for purifying and stabilizing uniform nanoparticles.
High Resolution Image Download MS PowerPoint Slide This article describes the stabilization and postsynthetic separation of gold nanostars (AuNS) synthesized with a morpholine-based Good’s buffer, 3-( N -morpholino)propanesulfonic acid. Resuspension of AuNS in ultrapure water improved the shape stability of the particles over 30 days. We demonstrated the sorting of nanostars via rate-zonal centrifugation through a linear sucrose gradient based on branch length and number. We determined that one round of centrifugation was sufficient for separation. Also, we improved the structural homogeneity and stability of the nanoparticles through the optimization of the storage conditions and established a robust method to sort AuNS based on size and shape.
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Chandra et al. (2017) studied this question.
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