title: Biofunctional hybrid materials: bimolecular organosilane monolayers on FeCr alloys.
abstract: Hybrid organic-inorganic interfaces are the key to functionalization of stainless steel (SS). We present a solution-based deposition method for fabricating uniform bimolecular organosilane monolayers on SS and show that their properties and functionalities can be further developed through site-specific biotinylation. We correlate molecular properties of the interface with its reactivity via surface sensitive synchrotron radiation mediated high-resolution photoelectron spectroscopy (HR-PES) and chemical derivatization (CD), and we demonstrate specific bonding of streptavidin proteins to the hybrid interface. The method facilitates efficient growth of uniform bimolecular organosilane monolayers on SS under ambient conditions without the need to prime the SS surface with vacuum-deposited inorganic buffer layers. The obtained insights into molecular bonding, orientation, and behaviour of surface-confined organofunctional silanes on SS enable a new generic approach to functionalization of SS surfaces with versatile nanomolecular organosilane layers.
authors.affiliation: Surface Science Laboratory, Optoelectronics Research Centre, Tampere University of Technology, PO Box 692, FI-33101 Tampere, Finland.
authors.forename: Leena
authors.initials: L
authors.lastname: Vuori
authors.forename: Jenni
authors.initials: J
authors.lastname: Leppiniemi
authors.forename: Markku
authors.initials: M
authors.lastname: Hannula
authors.forename: Kimmo
authors.initials: K
authors.lastname: Lahtonen
authors.forename: Mika
authors.initials: M
authors.lastname: Hirsimäki
authors.forename: Ergo
authors.initials: E
authors.lastname: Nõmmiste
authors.forename: Leila
authors.initials: L
authors.lastname: Costelle
authors.forename: Vesa P
authors.initials: VP
authors.lastname: Hytönen
authors.forename: Mika
authors.initials: M
authors.lastname: Valden