Ink-lithographic fabrication of silver-nanocrystal-based multiaxial strain gauge sensors through the coffee-ring effect for voice recognition applicationsopen access
- Authors
- Ahn, Junhyuk; Choi, Hyung Jin; Bang, Junsung; Son, Gayeon; Oh, Soong Ju
- Issue Date
- 8-10월-2022
- Publisher
- SPRINGER
- Keywords
- Silver nanocrystals; Coffee-ring effect; Ink-lithography; Multiaxial sensors; Voice recognition; Surface chemistry
- Citation
- NANO CONVERGENCE, v.9, no.1
- Indexed
- SCIE
SCOPUS
KCI
- Journal Title
- NANO CONVERGENCE
- Volume
- 9
- Number
- 1
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/145668
- DOI
- 10.1186/s40580-022-00337-3
- ISSN
- 2196-5404
- Abstract
- Human voice recognition techniques have remarkable potential for clinical applications because information from acoustic signals can reflect human body conditions. This paper reports the fabrication of Ag nanocrystal (NC)-based multiaxial wearable strain gauge sensors by ink-lithography for voice recognition systems. Benefiting from the one-step-device-fabrication strategy of ink-lithography, which can yield Ag NC patterns with specific dimensions and endow physical properties, the Ag NC-based multiaxial strain sensors can be fabricated on an ultrathin substrate (similar to 6 mu m). Additionally, the coffee-ring effect can be induced onto the Ag NC patterns to realize high sensitivity and angle dependence (gauge factors G(0)degrees = 11.7 +/- 1.2 and G(90)degrees = 105.5 +/- 20.1); moreover, the voice onset time for voice recognition can be detected by the sensors. These features assist in distinguishing between voiced and voiceless plosive contrasts via measurements of contact-based voice onset time differences and can act as a cornerstone for further advancements in wearable sensors as well as voice recognition and analysis.
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Collections - College of Engineering > Department of Materials Science and Engineering > 1. Journal Articles
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