Localized surface plasmon resonance nanochips with molecularly imprinted polymer coating for explosives sensing
Volodymyr Chegel, Andrii Lopatynskyi, Vitalii Lytvyn, Petro Demydov, Juan P. Martínez‐Pastor, Rafael Abargues, Enrique Gadea, Sergey A. Piletsky
Abstract
Sensor elements based on localized surface plasmon resonance phenomenon in arrays of Au nanostructures on glass substrates (nanochips) with molecularly imprinted acrylamide copolymer coating have been proposed for explosives analogues sensing in liquid and vapor phase. Nanochips exhibited detection limits of 1 pM in aqueous solution and 0.1 ppm in gaseous state against 4-nitrophenol. Vapor phase sensing of 4-nitrotoluene, 1-nitronaphthalene and 5-nitroisoquinoline using the developed 4-nitrophenol-imprinted plasmonic nanochips demonstrated partially selective response with time to signal saturation starting from 2 minutes.