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Title: 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.
Issue Date: 2020
Publisher: MDPI AG
Citation: Raman spectra of diphenylalanine microtubes: Polarisation and temperature effects / A. Krylov, S. Krylova, S. Kopyl, A. Krylov, et al. . — DOI 10.3390/cryst10030224 // Crystals. — 2020. — Vol. 3. — Iss. 10. — 224.
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 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. © 2020 by the authors. Licensee MDPI, Basel, Switzerland.
Access: info:eu-repo/semantics/openAccess
SCOPUS ID: 85083346666
WOS ID: 000523512100056
PURE ID: 12654602
ISSN: 2073-4352
DOI: 10.3390/cryst10030224
metadata.dc.description.sponsorship: Russian Foundation for Basic Research, RFBR: 18-02-00754
Fundação para a Ciência e a Tecnologia, FCT: CENTRO-01-0145-FEDER-031679
Türkiye Bilimsel ve Teknolojik AraÅ tirma Kurumu, Tà BITAK: UIDB/50011/2020, 115F227, UIDP/50011/2020
Instituto Nacional de Ciência e Tecnologia para Excitotoxicidade e Neuroproteção, INCT-EN
Fundação para a Ciência e a Tecnologia, FCT
Funding: This research was funded by the Russian Foundation for Basic Research grant number 18-02-00754, F.S. thanks Scientific and Technological Research Council of Turkey for support under Grant Number 115F227. S.Kopyl and A.Kholkin thank the joint project Portugal-Turkey TUBITAK/0006/2014. This work was developed within the scope of the project CICECO-Aveiro Institute of Materials, refs. UIDB/50011/2020 & UIDP/50011/2020, financed by national funds through the FCT/MEC. S.Kopyl, P.Z. and A.Kholkin were partly supported by FCT (Portugal) through the project “BioPiezo”-PTDC/CTM–CTM/31679/2017 (CENTRO-01-0145-FEDER-031679).
Part of this work was funded by national funds (OE), through FCT—Fundação para a Ciência e a Tecnologia, I.P., in the scope of the framework contract foreseen in the numbers 4, 5, and 6 of the article 23, of the Decree-Law 57/2016, of 29 August, changed by Law 57/2017, of 19 July.
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