Auto-Fluorescence in Phytoliths—A Mechanistic Understanding Derived From Microscopic and Spectroscopic Analyses
نویسندگان
چکیده
The detection of auto-fluorescence in phytogenic, hydrated amorphous silica depositions (phytoliths) has been found to be a promising approach verify if phytoliths were burnt or not, especially archaeological contexts. However, it is unknown so far at what temperature and how induced phytoliths. We used fluorescence microscopy, scanning electron microscope-energy dispersive X-ray spectroscopy (SEM-EDX), Fourier transform infrared analyze modern extracted from plant samples intact leaves winter wheat. Leaves heated different temperatures up 600°C. aims our experiments i) find out needed induce phytoliths, ii) detect temperature-dependent changes the molecular structure related auto-fluorescence, iii) derive mechanistic understanding organic compounds associated with cause treated below approx. 400°C. In higher temperatures, i.e., 450 600°C, phytolith was mainly caused by silica. Based on results we propose that clusterization-triggered emissions, which are overlapping clouds forming non-conventional chromophores. above about 400°C dihydroxylation formation siloxanes result oxygen clusters serve as chromophores events. Furthermore, SEM-EDX analyses revealed extractable dominated lumen (62%) compared cell wall (38%). Our findings might not only relevant phytolith-based examinations, but also for studies release silicon potential long-term carbon sequestration
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ژورنال
عنوان ژورنال: Frontiers in Environmental Science
سال: 2022
ISSN: ['2296-665X']
DOI: https://doi.org/10.3389/fenvs.2022.915947