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Hierarchical Metal Oxide Wrinkles as Responsive Chemical Sensors
journal contribution
posted on 2019-08-23, 18:42 authored by Woo-Bin Jung, Soo-Yeon Cho, Geun-Tae Yun, Junghoon Choi, Yesol Kim, Minki Kim, Hohyung Kang, Hee-Tae JungEasily observed wrinkle
structures comprise various materials.
Because evolutionary wrinkle structures exhibit a broad surface area,
light scattering, and hydrophobicity, the structural advantages of
wrinkles have been exploited in several research fields. Wrinkle structures
have been applied to various materials as well as used in metals,
graphene, and polymers; however, it is extremely difficult to prepare
metal oxide-based wrinkle structures because of the brittle nature
of metal oxide. In this study, a universal method for synthesizing
hierarchical metal oxide wrinkle (hereafter referred to as the H-wrinkle)
structures with precise morphology control was developed. Metal oxide
H-wrinkles were prepared using a polymer sacrificial layer and transferred
for consecutive thermal oxidations on the target substrate. To investigate
the morphological properties of the H-wrinkle, the CuO H-wrinkle was
applied to gas-sensing devices; it showed a sensitivity 6.07 times
greater than that of the pristine CuO film sensors. This significant
improvement corresponding to the unique morphological properties of
H-wrinkles renders considerable adsorption sites and high surface
permeability and subsequently permits the facile penetration of gas
into the sensing layers. In this study, we demonstrated a first example
of the use of the metal oxide wrinkle structure in electronic devices
and thus confirmed its use in various applications.
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- Biophysics
- Biochemistry
- Space Science
- Physical Sciences not elsewhere classified
- Medicine
- Genetics
- Molecular Biology
- Physiology
- Biotechnology
- Evolutionary Biology
- Environmental Sciences not elsewhere classified
- Chemical Sciences not elsewhere classified
- Astronomical and Space Sciences not elsewhere classified
- Inorganic Chemistry
Keywords
surface areaadsorption sitestarget substrateHierarchical Metal Oxide Wrinklessurface permeabilitymetal oxide H-wrinklesmetal oxide-based wrinkle structuresresearch fieldsmorphology controlCuO film sensorswrinkle structureswrinkle structures exhibitResponsive Chemical Sensorsmetal oxide wrinklemetal oxideWrinkle structuressensitivity 6.07 timesCuO H-wrinklegas-sensing devicesmetal oxide wrinkle structure
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