alexa Light Driven Directional Mass Transport Of Azo-benzene Containing Materials For Complex Tri-dimensional Structures On Surfaces
ISSN: 2169-0022

Journal of Material Sciences & Engineering
Open Access

OMICS International organises 3000+ Global Conferenceseries Events every year across USA, Europe & Asia with support from 1000 more scientific Societies and Publishes 700+ Open Access Journals which contains over 50000 eminent personalities, reputed scientists as editorial board members.

Open Access Journals gaining more Readers and Citations

700 Journals and 15,000,000 Readers Each Journal is getting 25,000+ Readers

This Readership is 10 times more when compared to other Subscription Journals (Source: Google Analytics)

Share This Page

Additional Info

Loading
Loading Please wait..
 

9th World Congress on Materials Science and Engineering
June 12-14, 2017 Rome, Italy

Stefano L Oscurato, Fabio Borbone, Pasqualino Maddalena and Antonio Ambrosio
University of Naples Federico II, Italy
Harvard University, Cambridge, USA
ScientificTracks Abstracts: J Material Sci Eng
DOI: 10.4172/2169-0022-C1-067
Abstract
Inspired by nature, in the last years the role of the topography of superficial textures in determining surface functionalities is increasingly recognized and the fabrication of controlled tridimensional textures became a demanding point of material science because of the potential applications in many fields as photonics, functional and smart surfaces. Standard fabrication techniques, including photo-lithography, electron beam and focused ion beam lithography, self-assembly, soft lithography, etc., often require multistep processes in order to realize 3D architectures and the fabricated geometries are rarely further tunable. However, the light-induced mass migration phenomenon arising in photo-responsive azo-benzene containing materials opens to new fabrication approaches. Under illumination, the azo-benzene molecules exhibit photo-isomerization trans-cis-trans cycles. This microscopic motion drives a reorganization of the host material, typically a polymer, in which the molecules are embedded, resulting in a macroscopic material displacement. This material motion is highly directional and occurs in the illuminating light polarization direction. Recently, our group proposed phenomenological models to deterministically predict the topography of the azo-surfaces resulting from lightsurface interaction in different configurations. So the light-driven mass migration can be actually used to fabricate new classes of surface topographies, which can be even further modified once fabricated. Here, we demonstrate the potentiality of this technique by realizing tri-dimensional complex superficial patterns based either on spatially structured illumination light patterns or on reshaping of pre-patterned surface architectures. Spatially modulated intensity patterns are achieved in a versatile way by phase-modulating a laser beam through a computer controlled spatial light modulator, resulting in topography modulation of the azo-surfaces, even with high spatial resolution (Fig. 1a). On the other side, tri-dimensional architectures are obtained by reshaping pristine pre-patterned micron-posts in simple illumination condition. These resulting structures are proven to produce a change in the wetting behavior of the textured surface with a demonstrated controlled directional droplet spreading (Fig. 1b).
Biography

Stefano L Oscurato has done his MSc in Physics from the University of Naples "Federico II" Italy, and his Master's dissertation was about the development of a holographic scanning microscopy technique. He is doing his Doctoral studies at the University of Naples, supervised by Professor Pasqualino Maddalena and Dr. Antonio Ambrosio. His PhD work is about the use of light-driven mass migration in azobenzene-containing materials for application in photonics, wettability and adhesion.

Email: [email protected]

image PDF   |   image HTML
 

Relevant Topics

Peer Reviewed Journals
 
Make the best use of Scientific Research and information from our 700 + peer reviewed, Open Access Journals
International Conferences 2017-18
 
Meet Inspiring Speakers and Experts at our 3000+ Global Annual Meetings

Contact Us

 
© 2008-2017 OMICS International - Open Access Publisher. Best viewed in Mozilla Firefox | Google Chrome | Above IE 7.0 version
adwords