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24 Dec 2012

Volume 101, Issue 26, Articles (26xxxx)

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Appl. Phys. Lett. 101, 263501 (2012); http://dx.doi.org/10.1063/1.4772532 (4 pages)

Youngki Yoon and Sayeef Salahuddin
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Effects of surface functional groups on the formation of nanoparticle-protein corona

R. Podila, R. Chen, P. C. Ke, J. M. Brown, and A. M. Rao

Appl. Phys. Lett. 101, 263701 (2012); http://dx.doi.org/10.1063/1.4772509 (4 pages)

Online Publication Date: 26 December 2012

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Herein, we examined the dependence of protein adsorption on the nanoparticle surface in the presence of functional groups. Our UV-visible spectrophotometry, transmission electron microscopy, infrared spectroscopy, and dynamic light scattering measurements evidently suggested that the functional groups play an important role in the formation of nanoparticle-protein corona. We found that uncoated and surfactant-free silver nanoparticles derived from a laser ablation process promoted a maximum protein (bovine serum albumin) coating due to increased changes in entropy. On the other hand, bovine serum albumin displayed a relatively lower affinity for electrostatically stabilized nanoparticles due to the constrained entropy changes.
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87.15.R- Reactions and kinetics
87.14.E- Proteins
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