P. Argitis, A. Cefalas, Z. Kollia, E. Sarantopoulou, T. Ford, Tony Stead, A. Marranca, C. Danson, J. Knott, D. Neely
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Single-pulse high-resolution x-ray contact microscopy with an advanced epoxy novolac resist
We report on the use of an epoxy novolac chemically amplified photoresist, to get x-ray images of living biological species in the water window of soft x-rays. This photoresist response was at least two orders of magnitude 'faster' than the standard used PMMA in contact x-ray microscopy. Atomic force microscopy of the resist, relief images obtained with biological specimen masking, suggests a resolution better than 300 nm in lateral dimensions - the size of the cell flagellas - and 20 nm in depth profiles.