Accurate and reliable characterization of solids and liquids is essential in medical applications as well as in pharmaceutical and industrial production sites. Vibrational microspectroscopy techniques such as quantum cascade laser based (QCL-IR), Fourier Transform IR-microscopes or near field scanning imagers have been established. Here we demonstrate how modern IR- spectroscopy and imaging from micro to nanoscale can provide a deep insight on the chemical composition. Here we use a dental application as an example for highlighting the potential of combining different techniques. The different results achieved by using complementary systems are presented.
Optical properties of experimental graphene dental nanocomposites were studied. Spectral reflectance was measured and S and K coefficients as well as transmittance of samples were calculated using Kubelka-Munk’s equations. The spectral behavior of S, K and T experimental graphene exhibited different trends compared with the commercial nanocomposites and they were statistically different. Experimental nanocomposites show higher scattering and lower transmittance when compared with commercial nanocomposite, probably, due to the shape, type and size of the filler. K for short wavelength of the pre-polymerized experimental nancomposites was very low. According to our results, hidroxypatite with graphene oxide used in dental nanocomposites needs to be improved to reproduce esthetic properties of natural dental tissues and to have potentially clinical applications.
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