Colusso, E.

Martucci, A.

Perotto, G.

English

UPCommons. Portal del coneixement obert de la UPC

 11AMR CONFERENCE, Barcelona 2022   BIOMIMETIC SOLUTION-BASED COATINGS FOR FUNCTIONAL APPLICATIONS  A. Martucci1*, E. Colusso1, G. Perotto2 1 Department of Industrial Engineering, University of Padova, Padova, Italy 2Smart Materials, Istituto Italiano Tecnologia, Genova, Italy  *alex.martucci@unipd.it  ☒ Oral presentation                      ☐ Poster presentation  ABSTRACT  Nature is a great source of inspiration for scientists and engineers to design and fabricate functional devices. Many animals and plants present a structural coloration, which is caused by the interaction of light with periodic structure, usually used in camouflage or to transmit information. Several natural surfaces show superwettability properties that allow self-cleaning abilities and water harvesting. Here, we show two examples of biomimetic coatings inspired by the cuticle of the Hoplia cerulea beetle and Stenocara beetle. The coatings were fabricated by using a simple and scalable approach based on layer-by-layer deposition of sol-gel solutions by spin coating.   We developed a multilayer film with structural color by alternating a low refractive index material (silk fibroin) with a high refractive index layer (titania nanosheets). As the beetle Hoplia coerulea is able to modify its color in the presence of moisture, thanks to the variation of the thin films stack responsible for the interference color, in the same way, our structure can sense the environmental humidity with a reversible mechanism and transduces the change in a colorimetric scale [1].  Inspired to the back of Namib desert beetle, we fabricated micropatterned surfaces through a controlled dewetting of bilayer films. By changing the chemistry of the silica sol-gel, we realized patterns with chemical and topological contrast, consisting of hydrophilic islands on a hydrophobic layer. These surfaces are amenable to application in atmospheric water capture, as they facilitate condensation from humid air [2].  [1] E. Colusso et al.,J. Mater Chem. C, 5 (2017), 3924-3931  [2] E. Colusso et al., Adv. Mater. Inter., 6 (2019), 1801629  

Biomimetic solution-based coatings for functional applications

https://upcommons.upc.edu/bitstream/2117/368138/1/Martucci-PADOVA.pdf

Biomimetic solution-based coatings for functional applications

Abstract

Similar works

Full text

Available Versions

UPCommons. Portal del coneixement obert de la UPC