An Inkjet‐Printed Field‐Effect Transistor for Label‐Free Biosensing. (31st July 2014)

• Record Type: Journal Article
• Authors: Medina‐Sánchez, Mariana; Martínez‐Domingo, Carme; Ramon, Eloi; Merkoçi, Arben
• Is Part Of: Advanced functional materials. Volume 24:Number 40(2014)
• Page Start: 6291
• Page End: 6302
• Publication Date: 2014-07-31
• Subjects: Materials -- Periodicals; Chemical vapor deposition -- Periodicals; 620.11
• DOI: 10.1002/adfm.201401180
• Languages: English
• ISSNs: 1616-301X

Abstract

<abstract abstract-type="main" xml:lang="en"> <title> <x xml:space="preserve">Abstract</x> </title> <p>A flexible, biological field‐effect transistor (BioFET) for use in biosensing is reported. The BioFET is based on an organic thin‐film transistor (OTFT) fabricated mainly by inkjet printing and subsequently functionalized with antibodies for protein recognition. The BioFET is assessed for label‐free detection of a model protein, human immunoglobulin G (HIgG). It is characterized electrically to evaluate the contribution of each step in the functionalization of the OTFT and to detect the presence of the target protein. The fabrication, structure, materials optimization, electrical characteristics, and functionality of the starting OTFT and final BioFET are also discussed. Different materials are evaluated for the top insulator layer, with the aim of protecting the lower layers from the electrolyte and preserving the BioFET electrical performance.</p> </abstract>