Elastic Properties of Protein Functionalized Nanoporous Polymer Films

Haoyu Wang, Charles T. Black, Pinar Akcora

Research output: Contribution to journalArticlepeer-review

7 Scopus citations

Abstract

Retaining the conformational structure and bioactivity of immobilized proteins is important for biosensor designs and drug delivery systems. Confined environments often lead to changes in conformation and functions of proteins. In this study, lysozyme is chemically tethered into nanopores of polystyrene thin films, and submicron pores in poly(methyl methacrylate) films are functionalized with streptavidin. Nanoindentation experiments show that stiffness of streptavidin increases with decreasing submicron pore sizes. Lysozymes in polystyrene nanopores are found to behave stiffer than the submicron pore sizes and still retain their specific bioactivity relative to the proteins on flat surfaces. Our results show that protein functionalized ordered nanoporous polystyrene/poly(methyl methacrylate) films present heterogeneous elasticity and can be used to study interactions between free proteins and designed surfaces.

Original languageEnglish
Pages (from-to)151-158
Number of pages8
JournalLangmuir
Volume32
Issue number1
DOIs
StatePublished - 12 Jan 2016

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