Optical Sciences

Biomolecules and nanostructures

The Optical Sciences group studies the interaction of light and matter. Our current focus is on detection and sensing/imaging with an emphasis on the development of integrated photonics. We are part of Twente University's Department of Science and Technology and member of the MESA+ institute.

 

Imaging soft samples in liquid with tuning fork based shear force microscopy

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Rensen WHJ, van Hulst NF, Kammer SB
APPLIED PHYSICS LETTERS
vol 77 issue 10: p1557-p1559 SEP 4 2000

We present a study of the dynamic behavior of tuning forks and the application of tuning fork based shear force microscopy o­n soft samples in liquid. A shift in resonance frequency and a recovery of the tip vibration amplitude have been observed upon immersion into liquid. Conservation of the vibration mode is confirmed by both direct stroboscopic observation and by detection of the tip vibration amplitude of the tuning fork. Thanks to the partial recovery of the Q factor upon complete immersion into liquid, it is possible to obtain high-resolution images o­n soft samples in liquid. This opens a new domain of applications for tuning fork based near-field scanning optical microscopes. (C) 2000 American Institute of Physics. [S0003- 6951(00)04436-3].
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