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2020
Journal Article
Titel
Fully Printed Flexible Chemiresistors with Tunable Selectivity Based on Gold Nanoparticles
Abstract
This study presents a method for printing flexible chemiresistors comprising thin film transducers based on cross-linked gold nanoparticles (GNPs). First, interdigitated silver paste electrodes are printed onto polyimide (PI) foil via dispenser printing. Second, coatings of GNPs and dithiol/monothiol blends are inkjet-printed onto these electrode structures. 1,9-Nonanedithiol (9DT) is used as cross-linking agent and a variety of monothiols are added to tune the sensors' chemical selectivity. When dosing these sensors with different analyte vapors (n-octane, toluene, 4-methyl-2-pentanone, 1-butanol, 1-propanol, ethanol, water; concentration range: 25-2000 ppm) they show fully reversible responses with short response and recovery times. The response isotherms follow a first-order Langmuir model, and their initial slopes reveal sensitivities of up to 4.5 × 10−5 ppm−1. Finally, it is demonstrated that arrays of printed sensors can be used to clearly discern analytes of different polarity.
Author(s)
Ketelsen, Bendix
Institute of Physical Chemistry, University of Hamburg, Grindelallee 117, 20146 Hamburg, Germany
Tjarks, Patrick P.
Institute of Physical Chemistry, University of Hamburg, Grindelallee 117, 20146 Hamburg, Germany; Department of Physics, National Taiwan University, Taipei 10617, Taiwan; Department of Chemical Engineering, National Taiwan University, Taipei 10617, Taiwan
Schlicke, Hendrik
Fraunhofer Center for Applied Nanotechnology CAN, Grindelallee 117, 20146 Hamburg, Germany
Liao, Ying-Chih
Department of Chemical Engineering, National Taiwan University, Taipei 10617, Taiwan