In situ chemoresistive sensing in the environmental TEM: Probing functional devices and their nanoscale morphology

Stephan Steinhauer, Jerome Vernieres, Johanna Krainer, Anton Köck, Panagiotis Grammatikopoulos, Mukhles Sowwan*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

15 Scopus citations

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 SnO2 nanowire 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 SnO2 nanowire 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.

Original languageEnglish
Pages (from-to)7380-7384
Number of pages5
JournalNanoscale
Volume9
Issue number22
DOIs
StatePublished - 14 Jun 2017
Externally publishedYes

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