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https://hdl.handle.net/10442/18048
Εξειδίκευση τύπου : | Άρθρο σε επιστημονικό περιοδικό |
Τίτλος: | Functional surfaces of laser-microstructured silicon coated with thermoresponsive PS/PNIPAM polymer blends: switching reversibly between hydrophilicity and hydrophobicity |
Δημιουργός/Συγγραφέας: | Kanidi, Maria [EL] Παπαγιαννόπουλος, Αριστείδης[EN] Papagiannopoulos, Aristeidis Matei, Andreea Dinescu, Maria [EL] Πίσπας, Στέργιος[EN] Pispas, Stergios [EL] Κάνδυλα, Μαρία[EN] Kandyla, Maria |
Εκδότης: | Elsevier |
Ημερομηνία: | 2020-06-22 |
Γλώσσα: | Αγγλικά |
ISSN: | 01694332 |
DOI: | 10.1016/j.apsusc.2020.146841 |
Περίληψη: | We developed functional surfaces of laser-microstructured silicon coated with
blends of polystyrene (PS) and poly(N-isopropylacrylamide) (PNIPAM) and we
study their switching wetting behavior between hydrophilicity and
hydrophobicity. Large areas of silicon are processed with reproducible surface
micromorphology and spin-coated with PS/PNIPAM blends of two blend ratios. The
wetting behavior of the surfaces is modified by the combination of surface
topography and surface chemistry effects. PS/PNIPAM films are casted on flat
and microstructured silicon substrates with or without a native SiO2 layer. All
films respond to the stimulus of temperature and films casted on
microstructured silicon substrates with a native SiO2 layer show the highest
thermoresponsiveness presumably because they adopt a more favorable structure.
Microstructuring provides a large specific area that extends the contact of
PNIPAM chains with water molecules according to the Wenzel model, and thus
increasing the film thermoresponsiveness, resulting in a reversible transition
from hydrophilicity to hydrophobicity upon heating. The absence of the native
SiO2 layer from the silicon substrates affects the PS and PNIPAM arrangement in
the films, increasing the water contact angle both below and above the lower
critical solution temperature of PNIPAM and decreasing their
thermoresponsiveness. |
Τίτλος πηγής δημοσίευσης: | Applied Surface Science |
Τόμος/Κεφάλαιο: | 527 |
Σελίδες: | 146841 |
Θεματική Κατηγορία: | [EL] Φυσική[EN] Physics [EL] Χημικά προϊόντα: Παραγωγή, χρήση κλπ[EN] Chemicals: Manufacture, use etc. [EL] Φασματοσκοπία[EN] Spectroscopy |
Λέξεις-Κλειδιά: | Laser-microstructured silicon PNIPAM Thermoresponsive polymers Wettability Blends Spin coating |
Κάτοχος πνευματικών δικαιωμάτων: | Copyright © 2020 Elsevier B.V. All rights reserved. |
Ηλεκτρονική διεύθυνση στον εκδότη (link): | http://arxiv.org/pdf/2006.12236v1 https://www.sciencedirect.com/science/article/abs/pii/S0169433220315981?via%3Dihub |
Ηλεκτρονική διεύθυνση περιοδικού (link) : | https://www.sciencedirect.com/journal/applied-surface-science |
Εμφανίζεται στις συλλογές: | Ινστιτούτο Θεωρητικής και Φυσικής Χημείας (ΙΘΦΧ) - Επιστημονικό έργο
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