Εξειδίκευση τύπου :	Άρθρο σε επιστημονικό περιοδικό
Τίτλος:	Entropy and random walk trails water confinement and non-thermal equilibrium in photon-induced nanocavities
Δημιουργός/Συγγραφέας:	Gavriil, Vassilios Chatzichristidi, Margarita Christofilos, Dimitrios Kourouklis, Gerasimos A [EL] Κόλλια, Ζωή[EN] Kollia, Zoe Bakalis, Evangelos [EL] Κεφαλάς, Αλκιβιάδης Κωνσταντίνος[EN] Cefalas, Alciviadis Constantinos [EL] Σαραντοπούλου, Ευαγγελία[EN] Sarantopoulou, Evangelia
Εκδότης:	MDPI
Ημερομηνία:	2020-06-02
Γλώσσα:	Αγγλικά
ISSN:	2079-4991
DOI:	10.3390/nano10061101
Άλλο:	32498312
Περίληψη:	Molecules near surfaces are regularly trapped in small cavitations. Molecular confinement, especially water confinement, shows intriguing and unexpected behavior including surface entropy adjustment; nevertheless, observations of entropic variation during molecular confinement are scarce. An experimental assessment of the correlation between surface strain and entropy during molecular confinement in tiny crevices is difficult because strain variances fall in the nanometer scale. In this work, entropic variations during water confinement in 2D nano/micro cavitations were observed. Experimental results and random walk simulations of water molecules inside different size nanocavitations show that the mean escaping time of molecular water from nanocavities largely deviates from the mean collision time of water molecules near surfaces, crafted by 157 nm vacuum ultraviolet laser light on polyacrylamide matrixes. The mean escape time distribution of a few molecules indicates a non-thermal equilibrium state inside the cavity. The time differentiation inside and outside nanocavities reveals an additional state of ordered arrangements between nanocavities and molecular water ensembles of fixed molecular length near the surface. The configured number of microstates correctly counts for the experimental surface entropy deviation during molecular water confinement. The methodology has the potential to identify confined water molecules in nanocavities with life science importance.
Τίτλος πηγής δημοσίευσης:	Nanomaterials (Basel, Switzerland) Special Issue: Dynamics and Applications of Photon-Nanostructured Systems
Τόμος/Κεφάλαιο:	10
Τεύχος:	6
Σελίδες:	1101
Θεματική Κατηγορία:	[EL] Φυσική[EN] Physics [EL] Φωτοχημεία[EN] Photochemistry [EL] Εφαρμοσμένη οπτική. Φωτονική[EN] Applied optics. Photonics [EL] Φυσική και θεωρητική χημεία[EN] Physical and theoretical chemistry [EL] Χημική τεχνολογία[EN] Chemical technolgy
Λέξεις-Κλειδιά:	AFM VUV irradiation Electric dipole interactions Entropy Nanocavities Nanoindentation Nanothermodynamics Non-thermal equilibrium Random walk Water
Κάτοχος πνευματικών δικαιωμάτων:	Copyright © 2020 by the authors. Licensee MDPI, Basel, Switzerland
Ηλεκτρονική διεύθυνση στον εκδότη (link):	https://www.mdpi.com/2079-4991/10/6/1101
Ηλεκτρονική διεύθυνση περιοδικού (link) :	https://www.mdpi.com/journal/nanomaterials
Εμφανίζεται στις συλλογές:	Ινστιτούτο Θεωρητικής και Φυσικής Χημείας (ΙΘΦΧ) - Επιστημονικό έργο