title: In situ chemoresistive sensing in the environmental TEM: probing functional devices and their nanoscale morphology.
abstract: In situ transmission electron microscopy provides exciting opportunities to address fundamental questions and technological aspects related to functional nanomaterials, including the structure-property relationships of miniaturized electronic devices. Herein, we report the in situ chemoresistive sensing in the environmental transmission electron microscope (TEM) with a single SnO2nanowire device, studying the impact of surface functionalization with heterogeneous nanocatalysts. By detecting toxic carbon monoxide (CO) gas at ppm-level concentrations inside the microscope column, the sensing properties of a single SnO2nanowire were characterized before and after decoration with hybrid Fe-Pd nanocubes. The structural changes of the supported nanoparticles induced by sensor operation were revealed, enabling direct correlation with CO sensing properties. Our novel approach is applicable for a broad range of functional nanomaterials and paves the way for future studies on the relationship between chemoresistive properties and nanoscale morphology.
authors.affiliation: Nanoparticles by Design Unit, Okinawa Institute of Science and Technology (OIST) Graduate University, 1919-1 Tancha, Onna-Son, Okinawa 904-0495, Japan. mukhles@oist.jp.
authors.forename: Stephan
authors.initials: S
authors.lastname: Steinhauer
authors.forename: Jerome
authors.initials: J
authors.lastname: Vernieres
authors.forename: Johanna
authors.initials: J
authors.lastname: Krainer
authors.forename: Anton
authors.initials: A
authors.lastname: Köck
authors.forename: Panagiotis
authors.initials: P
authors.lastname: Grammatikopoulos
authors.forename: Mukhles
authors.initials: M
authors.lastname: Sowwan