Controlled Swapping of Nanocomposite Surface Wettability by Multilayer Photopolymerization

View Author Information
Center for Biomolecular Nanotechnologies @UNILE, Istituto Italiano di Tecnologia, via Barsanti, Arnesano, 73100 Lecce, Italy
National Nanotechnology Laboratory (NNL), CNR - Istituto Nanoscienze, via per Arnesano, 73100 Lecce, Italy
Istituto Italiano di Tecnologia (IIT), via Morego 30, 16163 Genova, Italy
Dipartimento di Ingegneria dell’Innovazione, Università del Salento, via per Arnesano, 73100 Lecce, Italy
E-mail: [email protected] (F.V.-M.); [email protected] (A.A.).
Cite this: Langmuir 2011, 27, 13, 8522–8529
Publication Date (Web):June 3, 2011
https://doi.org/10.1021/la2017402
Copyright © 2011 American Chemical Society
Article Views
549
Altmetric
-
Citations
LEARN ABOUT THESE METRICS
Read OnlinePDF (4 MB)
Supporting Info (1)»

Abstract

Single-layered photopolymerized nanocomposite films of polystyrene and TiO2 nanorods change their wetting characteristics from hydrophobic to hydrophilic when deposited on substrates with decreasing hydrophilicity. Interestingly, the addition of a second photopolymerized layer causes a swapping in the wettability, so that the final samples result converted from hydrophobic to hydrophilic or vice versa. The wettability characteristics continue to be swapped as the number of photopolymerized layers increases. In fact, odd-layered samples show the same wetting behavior as single-layered ones, while even-layered samples have the same surface characteristics as double-layered ones. Analytical surface studies demonstrate that all samples, independently of the number of layers, have similar low roughness, and that the wettability swap is due to the different concentration of the nanocomposites constituents on the samples surface. Particularly, the different interactions between the hydrophilic TiO2 nanorods and the underlying layer lead to different amounts of nanorods exposed on the nanocomposites surface. Moreover, due to the unique property of TiO2 to reversibly increase its wettability upon UV irradiation and subsequent storage, the wetting characteristics of the multilayered nanocomposites can be tuned in a reversible manner. In this way, a combination of substrate, number of photopolymerized layers, and external UV light stimulus can be used in order to precisely control the surface wettability properties of nanocomposite films, opening the way to a vast number of potential applications in microfluidics, protein assays, and cell growth.

Supporting Information

ARTICLE SECTIONS
Jump To

Figure S1, showing a TEM image of the ST/PI/TiO2 solution before photopolymerization; Figures S2 and S3, showing FT-IR spectra of photopolymerized and as-received PS/TiO2 NRs samples, respectively; Figure S4, showing a schematic representation of the light measurements; Figure S5, showing a simple model of the photopolymerization process; Figure S6, showing the WCA values of sextuple- and septuple-layered samples, both on glass and silicon substrate; and Figure S7, showing AFM images of sextuple- and septuple-layered samples on glass and silicon substrates. This material is available free of charge via the Internet at http://pubs.acs.org.

Terms & Conditions

Most electronic Supporting Information files are available without a subscription to ACS Web Editions. Such files may be downloaded by article for research use (if there is a public use license linked to the relevant article, that license may permit other uses). Permission may be obtained from ACS for other uses through requests via the RightsLink permission system: http://pubs.acs.org/page/copyright/permissions.html.

Cited By


This article is cited by 14 publications.

  1. Fabrizio Spano, Alessandro Massaro, Laura Blasi, Mario Malerba, Roberto Cingolani, and Athanassia Athanassiou . In Situ Formation and Size Control of Gold Nanoparticles into Chitosan for Nanocomposite Surfaces with Tailored Wettability. Langmuir 2012, 28 (8) , 3911-3917. https://doi.org/10.1021/la203893h
  2. Neethumol Varghese, Tania Francis, Meril Shelly, Ajalesh B. Nair. Nanocomposites of polymer matrices: Nanoscale processing. 2021,,, 383-406. https://doi.org/10.1016/B978-0-12-820569-3.00014-1
  3. Ayesha Kausar. Anti-corrosion coatings derived from conducting polymeric nanocomposites. 2021,,, 185-209. https://doi.org/10.1016/B978-0-12-822463-2.00010-5
  4. Ragab A. M. Said, Mohamed A. Hasan, Ahmed M. Abdelzaher, Ahmed M. Abdel-Raoof. Review—Insights into the Developments of Nanocomposites for Its Processing and Application as Sensing Materials. Journal of The Electrochemical Society 2020, 167 (3) , 037549. https://doi.org/10.1149/1945-7111/ab697b
  5. Qiupeng Hou, Xiwen Wang, Arthur J. Ragauskas. Preparation and characterization of nanocellulose–polyvinyl alcohol multilayer film by layer-by-layer method. Cellulose 2019, 26 (8) , 4787-4798. https://doi.org/10.1007/s10570-019-02413-0
  6. Phuong Nguyen-Tri, Tuan Anh Nguyen, Pascal Carriere, Cuong Ngo Xuan. Nanocomposite Coatings: Preparation, Characterization, Properties, and Applications. International Journal of Corrosion 2018, 2018 , 1-19. https://doi.org/10.1155/2018/4749501
  7. Hao Yang, Xiaojing Hu, Chunping Su, Yunling Liu, Rong Chen. Reversibly photo-switchable wettability of stearic acid monolayer modified bismuth-based micro-/nanomaterials. Physical Chemistry Chemical Physics 2017, 19 (47) , 31666-31674. https://doi.org/10.1039/C7CP05848A
  8. Jingpeng Li, Qingfeng Sun, Shenjie Han, Jin Wang, Zhe Wang, Chunde Jin. Reversibly light-switchable wettability between superhydrophobicity and superhydrophilicity of hybrid ZnO/bamboo surfaces via alternation of UV irradiation and dark storage. Progress in Organic Coatings 2015, 87 , 155-160. https://doi.org/10.1016/j.porgcoat.2015.05.028
  9. Athanasios Milionis, Despina Fragouli, Ilker S. Bayer, Athanassia Athanassiou. Water Adhesion to Laser-Treated Surfaces. 2014,,, 377-413. https://doi.org/10.1002/9781118831670.ch10
  10. Roman Selyanchyn, Seung-Woo Lee. Molecularly imprinted polystyrene–titania hybrids with both ionic and π–π interactions: a case study with pyrenebutyric acid. Microchimica Acta 2013, 180 (15-16) , 1443-1452. https://doi.org/10.1007/s00604-013-1095-3
  11. Uddipta Ghosh, Suman Chakraborty. Electrokinetics over charge-modulated surfaces in the presence of patterned wettability: Role of the anisotropic streaming potential. Physical Review E 2013, 88 (3) https://doi.org/10.1103/PhysRevE.88.033001
  12. Niranjan Patra, Marco Salerno, P. Davide Cozzoli, Alberto C. Barone, Luca Ceseracciu, Francesca Pignatelli, Riccardo Carzino, Lara Marini, Athanassia Athanassiou. Thermal and mechanical characterization of poly(methyl methacrylate) nanocomposites filled with TiO2 nanorods. Composites Part B: Engineering 2012, 43 (8) , 3114-3119. https://doi.org/10.1016/j.compositesb.2012.04.028
  13. Tapan K. Das, Smita Prusty. Review on Conducting Polymers and Their Applications. Polymer-Plastics Technology and Engineering 2012, 51 (14) , 1487-1500. https://doi.org/10.1080/03602559.2012.710697
  14. Uddipta Ghosh, Suman Chakraborty. Patterned-wettability-induced alteration of electro-osmosis over charge-modulated surfaces in narrow confinements. Physical Review E 2012, 85 (4) https://doi.org/10.1103/PhysRevE.85.046304