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Structural solution to enhance the sensitivity of a self-powered pressure sensor for an artificial tactile system

Title
Structural solution to enhance the sensitivity of a self-powered pressure sensor for an artificial tactile system
Authors
Sim, M.[Sim, Min Kyung]Lee, K.H.[Lee, Kyung Hwa]Jeong, Y.[Jeong, Ye Ri]Shin, J.H.[Shin, Jeong Hee]Sohn, J.I.[Sohn, Jung Inn]Cha, S.N.[Cha, Seung Nam]Jang, J.E.[Jang, Jae Eun]
DGIST Authors
Sim, M.[Sim, Min Kyung]; Shin, J.H.[Shin, Jeong Hee]; Jang, J.E.[Jang, Jae Eun]
Issue Date
2016
Citation
IEEE Transactions on Nanobioscience, 15(8), 804-811
Type
Article
Article Type
Article
Keywords
Artificial Tactile SensorCell Array StructuresCellsCytologyEfficiencyIntelligent AgentsNanowiresPiezoelectric EffectPiezoelectric EfficienciesPiezoelectric VoltagePiezoelectricityPressure EffectsPressure SensitivitiesPressure SensorPressure SensorsProduct DesignSquare Pattern ArraySquare PatternsStructural DesignStructural SolutionsTactile SensorsZinc OxideZnO NanowireZnO Nanowires
ISSN
1536-1241
Abstract
Structural design factors of sensor units have been studied in order to enhance the sensitivity of pressure sensors based on utilizing a piezoelectric material for an artificial tactile sensor. In this study, we have primarily demonstrated the effect of a square pattern array design in a pressure sensor using ZnO nanowires. Nanowires grown on the edge of cells can be bent easily because of growth direction, density control, and buckling effect. Since smaller square pattern arrays induce a higher circumference to cell area ratio, if one sensor unit consists of many micro-level square pattern arrays, the design enhances the piezoelectric efficiency and the sensitivity. As a result, 20μm × 20μm cell arrays showed three times higher pressure sensitivity than 250μm × 250μm cell array structures at a pressure range from 4 kPa to 14 kPa. The induced piezoelectric voltage with the same pressure level also increased drastically. Therefore, the square pattern array design is more appropriate for a high-sensitive pressure sensor than a simple one-body cell design for tactile systems, and it has the advantage of better power efficiency, which is also important for artificial tactile systems. This suggested cell array design can be applied to various systems using piezoelectric nanowires. © 2002-2011 IEEE.
URI
http://hdl.handle.net/20.500.11750/1647
DOI
10.1109/TNB.2016.2621747
Publisher
Institute of Electrical and Electronics Engineers Inc.
Related Researcher
  • Author Jang, Jae Eun Advanced Electronic Devices Research Group(AEDRG)
  • Research Interests
Files:
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Collection:
Information and Communication EngineeringETC1. Journal Articles


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