A photoresponse-compensated parallel piezoresistive cantilever for cellular force measurements

Uijin G. Jung*, Kenta Kuwana, Yoshiharu Ajiki, Hidetoshi Takahashi, Tetsuo Kan, Yusuke Takei, Kentaro Noda, Eiji Iwase, Kiyoshi Matsumoto, Isao Shimoyama


研究成果: Article査読

7 被引用数 (Scopus)


This paper describes a parallel piezoresistive cantilever that is composed of a force-sensing cantilever in addition to a reference cantilever for photoresponse compensation. Piezoresistive cantilevers have been applied in many cellular mechanical measurement studies because of their high sensitivity, high time resolution and ease of handling. However, the electrical resistance changes in response to the excitation light of the fluorescence microscope, which affects the cell measurements. We measured the I-V characteristics of a piezoresistive layer. These photoresponses occurred due to the internal photoelectric effect. We canceled the photoresponses using the reference cantilever. This paper demonstrates compensation of the cantilever photoresponse under irradiation at different angles, wavelengths and light intensities. As a result, the photoresponse could be decreased by 87%.

ジャーナルJournal of Micromechanics and Microengineering
出版ステータスPublished - 2013 4月

ASJC Scopus subject areas

  • 電子材料、光学材料、および磁性材料
  • 材料力学
  • 機械工学
  • 電子工学および電気工学


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