Passivated Aluminum Nanohole Arrays for Label-Free Biosensing Applications

We report the fabrication and performance of a surface plasmon resonance aluminum nanohole array refractometric biosensor. An aluminum surface passivation treatment based on oxygen plasma is developed in order to circumvent the undesired effects of oxidation and corrosion usually found in aluminum-b...

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Published inACS applied materials & interfaces Vol. 6; no. 2; pp. 1005 - 1010
Main Authors Canalejas-Tejero, Víctor, Herranz, Sonia, Bellingham, Alyssa, Moreno-Bondi, María Cruz, Barrios, Carlos Angulo
Format Journal Article
LanguageEnglish
Published United States American Chemical Society 22.01.2014
Subjects
Aluminum - chemistry
Biosensing Techniques - instrumentation
Biosensing Techniques - methods
Biotin - chemistry
Dextrans - isolation & purification
Nanostructures - chemistry
Surface Plasmon Resonance
oxidation
nanoholes
surface passivation
biosensor
aluminum
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Summary:We report the fabrication and performance of a surface plasmon resonance aluminum nanohole array refractometric biosensor. An aluminum surface passivation treatment based on oxygen plasma is developed in order to circumvent the undesired effects of oxidation and corrosion usually found in aluminum-based biosensors. Immersion tests in deionized water and device simulations are used to evaluate the effectiveness of the passivation process. A label-free bioassay based on biotin analysis through biotin-functionalized dextran–lipase conjugates immobilized on the biosensor-passivated surface in aqueous media is performed as a proof of concept to demonstrate the suitability of these nanostructured aluminum films for biosensing.
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ISSN:1944-8244
1944-8252
DOI:10.1021/am404509f