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A Hollow Assembly and Its Three-Dimensional Network Formation of Single-Crystalline Co3O4 Nanoparticles for Ultrasensitive Formaldehyde Gas Sensors

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Title
A Hollow Assembly and Its Three-Dimensional Network Formation of Single-Crystalline Co3O4 Nanoparticles for Ultrasensitive Formaldehyde Gas Sensors
Author(s)
Jae Young Kim; Choi, NJ; Park, HJ; Jinmo Kim; Lee, DS; Hyunjoon Song
Publication Date
2014-11
Journal
JOURNAL OF PHYSICAL CHEMISTRY C, v.118, no.45, pp.25994 - 26002
Publisher
AMER CHEMICAL SOC
Abstract
The detection of formaldehyde at a very low concentration is a significant research topic, due to its detrimental impact on human health. In the present study, we fabricated a hierarchical structure by the rational assembly of single-crystalline Co3O4 nanoparticles. A hollow morphology using sacrificial ZnO spheres could form a three-dimensional conducting network in a solid state. The resulting structure was selectively active for formaldehyde sensing, and the detection limit was 50 ppb, which was nearly close to the record-high value among the other semiconducting materials. Such superior properties were attributed to the regular, hierarchically assembled structures with a small crystalline domain size, a thin hollow morphology with a large surface area, and a three-dimensional conductive network with a narrow diameter. We believe that this hierarchical assembly can show great potential as a platform for improving human health through the monitoring of indoor environments © 2014 American Chemical Society
URI
https://pr.ibs.re.kr/handle/8788114/4858
DOI
10.1021/jp505791v
ISSN
1932-7447
Appears in Collections:
Center for Nanomaterials and Chemical Reactions(나노물질 및 화학반응 연구단) > 1. Journal Papers (저널논문)
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J. Phys. Chem. C 2014, 118, 25994−26002.pdfDownload

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