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

doi:10.1039/c6nr09322a

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 journal › Article › peer-review

19 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 language	English
Pages (from-to)	7380-7384
Number of pages	5
Journal	Nanoscale
Volume	9
Issue number	22
DOIs	https://doi.org/10.1039/c6nr09322a
State	Published - 14 Jun 2017
Externally published	Yes

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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.",

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AU - Vernieres, Jerome

AU - Krainer, Johanna

AU - Köck, Anton

AU - Grammatikopoulos, Panagiotis

AU - Sowwan, Mukhles

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AB - 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.

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

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