Raman Spectra of Diphenylalanine Microtubes: Polarisation and Temperature Effects
authors Krylov, A; Krylova, S; Kopyl, S; Krylov, A; Salehli, F; Zelenovskiy, P; Vtyurin, A; Kholkin, A
nationality International
journal CRYSTALS
author keywords diphenylalanine; Raman spectra; phase transition; polarisation; temperature effects
keywords PIEZOELECTRIC PROPERTIES; PHASE-TRANSITIONS; SPECTROSCOPY; SCATTERING; CRYSTAL; PRESSURE; PHONONS
abstract Diphenylalanine microtubes have remarkable physical properties that allow one to use them in electronics. In this work, we measured polarised temperature-dependent Raman spectra in self-assembled diphenylalanine microtubes grown from the solution. We observed the anomalous temperature behaviour of the Raman lines. Their temperature changes were minimal, which required a significant improvement in the resolution and stability of Raman measurements. The anomalies in the behaviour of the spectra at about 178 K, 235 K, 255 K, 278 K, 296 K, 398 K and 412 K were observed. The structural phase transition at 398 K is irreversible. This transition is associated with the release of water molecules from nanochannels. The irreversible phase transition has a temperature range of about 10 K.
publisher MDPI
issn 2073-4352
year published 2020
volume 10
issue 3
digital object identifier (doi) 10.3390/cryst10030224
web of science category Crystallography; Materials Science, Multidisciplinary
subject category Crystallography; Materials Science
unique article identifier WOS:000523512100056
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journal analysis (jcr 2019):
journal impact factor 2.404
5 year journal impact factor 2.376
category normalized journal impact factor percentile 55.537
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