Operation of a wet near-field scanning optical microscope in stable zones by minimizing the resonance change of tuning forks

A resonant shift and a decrease of resonance quality of a tuning fork attached to a conventional fiber optic probe in the vicinity of liquid is monitored systematically while varying the protrusion length and immersion depth of the probe. Stable zones where the resonance modification as a function of immersion depth is minimized are observed. A wet near-field scanning optical microscope (wet-NSOM) is operated for a sample within water by using such a stable zone.

Kyoung-Duck Park, Doo Jae Park, Seung Gol Lee, Geunchang Choi, Dai-Sik Kim, Clare Chisu Byeon, Soo Bong Choi and Mun Seok Jeong

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