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Sensors 2012, 12(2), 1758-1770; doi:10.3390/s120201758

Comparison between Conduction and Convection Effects on Self-Heating in Doped Microcantilevers

Department of Mechanical Engineering, Inha University, 253 Yonghyun-dong, Nam-Ku, Incheon 402-751, Korea
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Received: 3 January 2012 / Revised: 1 February 2012 / Accepted: 3 February 2012 / Published: 9 February 2012
(This article belongs to the Section Biosensors)
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Abstract

The present study investigates the effects of thermal conduction and convection on self-heating temperatures and bimetallic deflections produced in doped microcantilever sensors. These cantilevers are commonly used as sensors and actuators in microsystems. The cantilever is a monolith, multi-layer structure with a thin U-shaped element inside. The cantilever substrate is made of silicon and silicon dioxide, respectively, and the element is p-doped silicon. A numerical analysis package (ANSYS) is used to study the effect of cantilever substrate material, element width, applied voltage and the operating environments on cantilever characteristics. The numerical results for temperature are compared against their analytical models. Results indicate the numerical results are accurate within 6% of analytical, and Si/Si cantilevers are more suitable for biosensors and AFM, whereas, Si/SiO2 are for hotplates and actuators applications. View Full-Text
Keywords: microcantilever; self-heating; biosensors; hotplates; piezoresistivity; electrical resistivity; bimetallic effect microcantilever; self-heating; biosensors; hotplates; piezoresistivity; electrical resistivity; bimetallic effect
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This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).

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MDPI and ACS Style

Ansari, M.Z.; Cho, C. Comparison between Conduction and Convection Effects on Self-Heating in Doped Microcantilevers. Sensors 2012, 12, 1758-1770.

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