Spectroscopic Detection of Critical Compression of Carbon Dioxide Confined in Nanoporous Aerogel by Coherent Anti-Stokes Raman SpectroscopyстатьяИсследовательская статья
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Дата последнего поиска статьи во внешних источниках: 20 января 2021 г.
Аннотация:The compaction of carbon dioxide in the pores of nanoporous silicon aerogel at near-critical temperatures has been studied by coherent anti-Stokes light scattering (CARS) spectroscopy. The density was determined by the shift of the vibrational line at 1388 cm−1 under isochoric heating from the subcritical temperature of 25.2◦C to the supercritical one of 31.95◦C. It was found that the density of carbon dioxide in nanopores near the critical temperature increases, exceeding the average value in the cuvette by about ∼20%.