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The l,l-diphenylalanine can self-assemble into long and stiff nanotubes with remarkable mechanical and chemical stability. In this work, Raman spectroscopy was used to investigate the vibrational properties of l,l-diphenylalanine single crystal under high-pressure conditions up to 7.4GPa. The results show great modifications in the low-wavenumber bands accompanied by some changes in the internal mode...
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