| 摘要 |
PROBLEM TO BE SOLVED: To heighten a Q-value of a cantilever whose portion on the free end side is dipped into liquid. SOLUTION: This biosensor includes: a cantilever 21 whose portion on the free end side is dipped into the liquid 9; a driving part for exciting the cantilever 21 so that the cantilever 21 is resonated in the n-order vibration mode (n is an integer of 2 or more), while supporting a fixed end of the cantilever 21 on a support part; and a frequency detection part for acquiring a resonance frequency of the cantilever 21. When measuring by the biosensor, one node A1 of the cantilever 21 vibrating in the n-order vibration mode is arranged on the liquid surface 91 of the liquid 9. Hereby, generation of a wave resistance on the liquid surface 91 is suppressed, and decline of the Q-value of the cantilever 21 whose portion on the free end side is dipped into the liquid 9, caused by dipping of the cantilever into the liquid can be reduced. COPYRIGHT: (C)2011,JPO&INPIT
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