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.

 

ATOMIC FORCE MICROSCOPE FEATURING AN INTEGRATED OPTICAL MICROSCOPE

(full pdf)

PUTMAN CAJ, VANDERWERF KO, DEGROOTH BG, VANHULST NF, SEGERINK FB, GREVE J
ULTRAMICROSCOPY
vol 42: p1549-p1552 part B JUL 1992

The atomic force microscope (AFM) is used to image the surface of both conductors and nonconductors. Biological specimens constitute a large group of nonconductors. A disadvantage of most AFM's is the fact that relatively large areas of the sample surface have to be scanned to pinpoint a biological specimen (e.g. cell, chromosome) of interest. The AFM presented here features an incorporated optical microscope. Using an XY- stage to move the sample, an object is selected with the aid of the optical microscope and a high-resolution image of the object can be obtained using the AFM. Results o­n chromosomes and cells demonstrate the potential of this instrument. The microscope further enables a direct comparison between optically observed features and topological information obtained from AFM images.
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