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Scanning electron microscope microphotograph of the diatom Thalassiosira rotula Meunier: A plain view of the diatoms on the chip. In the two insets are reported an enlargement of a single diatom and the detail of its surface.
Photoluminescence normalized spectrum of diatoms in air. The dashed lines are the Gaussian profiles corresponding to different bands used to fit the experimental data. The multi-fit procedure has a .
Infrared spectrum of diatoms measured in reflectance mode using a FTIR microscope.
Quenching of diatoms photoluminescence spectra in the presence of several gaseous substances: The numbers on top of each spectrum indicate the peak position as estimated by numerical fit.
Enhancing of diatoms photoluminescence spectra in presence of pyridine and xylene: The numbers on top of each spectrum indicate the peak position as estimated by numerical fit.
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