Nanometer Confinement Induces Nematic Order in 1-Dodecanol
Autor(en): | Ananiadou, Antonela Papamokos, George Steinhart, Martin Floudas, George |
Stichwörter: | Chemistry; Chemistry, Physical | Erscheinungsdatum: | 2020 | Herausgeber: | AMER CHEMICAL SOC | Journal: | JOURNAL OF PHYSICAL CHEMISTRY B | Volumen: | 124 | Ausgabe: | 47 | Startseite: | 10850 | Seitenende: | 10857 | Zusammenfassung: | The phase state and molecular dynamics of 1-dodecanol are studied in the bulk and under nanometer confinement within self-ordered nanoporous alumina templates. A rotator phase in the bulk is absent under confinement. A nematic liquid crystalline phase is formed instead in pores with diameters from 400 down to 25 nm. Results are based on the changes in temperature-dependence of dielectric permittivity and X-ray diffraction. The phase diagram under confinement is explored, and the limits of the nematic-to-isotropic and crystalline-to-nematic phase transitions are identified. The phase diagram allows for a direct transition from the liquid to the low-temperature crystalline phase in pores with a diameter below 20 nm. Furthermore, we report on the dielectric fingerprint of the rotator phase and the molecular dynamics in bulk 1-dodecanol. |
ISSN: | 15206106 | DOI: | 10.1021/acs.jpcb.0c08403 |
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