Porous polymer colorimetric vapor- sensing elements have been produced using a holographic interferometry technique. Acetone vapor is detected by the change in the peak reflective wavelength of the resulting photonic bandgap structures (see Figure). The transmission electron microscopy image (Figure, inset) shows the voids generated in the film by adding a non-reactive solvent to the prepolymer syrup.
If you can't find a tool you're looking for, please click the link at the top of the page to "Go to old article view". Alternatively, view our Knowledge Base articles for additional help. Your feedback is important to us, so please let us know if you have comments or ideas for improvement.