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• Ansari, M
• Cho, C
• Kim, J
• Bang, B
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• Ansari, M
• Cho, C
• Kim, J
• Bang, B
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• Ansari, M
• Cho, C
• Kim, J
• Bang, B

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Sensors 2009, 9(4), 2706-2718; doi:10.3390/s90402706

Article

Comparison between Deflection and Vibration Characteristics of Rectangular and Trapezoidal profile Microcantilevers

Mohd. Zahid Ansari, Chongdu Cho* , Jooyong Kim and Booun Bang

Department of Mechanical Engineering, Inha University, 253 Yonghyun-dong, Nam-Ku, Incheon, 402-751 Republic of Korea

* Author to whom correspondence should be addressed.

Received: 2 April 2009; in revised form: 10 April 2009 / Accepted: 15 April 2009 / Published: 16 April 2009

(This article belongs to the Section Biosensors)

Download PDF Full-Text [481 KB, uploaded 17 April 2009 13:34 CEST]

Abstract: Arrays of microcantilevers are increasingly being used as physical, biological, and chemical sensors in various applications. To improve the sensitivity of microcantilever sensors, this study analyses and compares the deflection and vibration characteristics of rectangular and trapezoidal profile microcantilevers. Three models of each profile are investigated. The cantilevers are analyzed for maximum deflection, fundamental resonant frequency and maximum stress. The surface stress is modelled as in-plane tensile force applied on the top edge of the microcantilevers. A commercial finite element analysis software ANSYS is used to analyze the designs. Results show paddled trapezoidal profile microcantilevers have better sensitivity.

Keywords: Sensor; Surface stress; Microcantilever; Resonant Frequency; Deflection

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