title: Hot Spot-Localized Artificial Antibodies for Label-Free Plasmonic Biosensing.
abstract: The development of biomolecular imprinting over the last decade has raised promising perspectives in replacing natural antibodies with artificial antibodies. A significant number of reports have been dedicated to imprinting of organic and inorganic nanostructures, but very few were performed on nanomaterials with a transduction function. Herein we describe a relatively fast and efficient plasmonic hot spot-localized surface imprinting of gold nanorods using reversible template immobilization and siloxane co-polymerization. The technique enables a fine control of the imprinting process at the nanometer scale and provides a nanobiosensor with high selectivity and reusability. Proof of concept is established by the detection of neutrophil gelatinase-associated lipocalin (NGAL), a biomarker for acute kidney injury, using localized surface plasmon resonance spectroscopy. The work represents a valuable step towards plasmonic nanobiosensors with synthetic antibodies for label-free and cost-efficient diagnostic assays. We expect that this novel class of surface imprinted plasmonic nanomaterials will open up new possibilities in advancing biomedical applications of plasmonic nanostructures.
authors.affiliation: Department of Mechanical Engineering and Materials Science. Washington University in St. Louis, St Louis, MO, 63130 (USA).
authors.forename: Abdennour
authors.initials: A
authors.lastname: Abbas
authors.forename: Limei
authors.initials: L
authors.lastname: Tian
authors.forename: Jeremiah J
authors.initials: JJ
authors.lastname: Morrissey
authors.forename: Evan D
authors.initials: ED
authors.lastname: Kharasch
authors.forename: Srikanth
authors.initials: S
authors.lastname: Singamaneni
keywords: Artificial antibodies; Gold nanorods; Localized surface plasmon resonance; Macromolecular imprinting; Plasmonic biosensors