Abstract
Colloidal azopolymer nanospheres assembled on a glass substrate were exposed to a single collimated laser beam. The combination of photo-fluidic elongation of the spherical colloids and light induced self-organization of the azopolymer film allows the quasi-instantaneous growth of a large amplitude surface relief grating. Pre-structuration of the sample with the nanosphere assembly supports faster creation of the spontaneous pattern. Confinement into the nanospheres provides exceptionally large modulation amplitude of the spontaneous relief. The method is amenable to any kind of photoactive azo-materials.
Highlights
Derivatives of azobenzene are candidates for the remote optical control of molecules owing to their efficient and reversible cis-trans photoisomerization around the azo-bond [1]
The directional photofluidization of azopolymer experienced with two orthogonal canals prepared by holography on an azopolymer film proved strongly dependent on the polarization [6]
Monolayer or bilayer colloidal crystal films made of self-assembled nanospheres are used in a variety of applications in which their structure can develop into photonic crystals, chemical sensors and anti-reflective coatings [11]
Summary
Derivatives of azobenzene are candidates for the remote optical control of molecules owing to their efficient and reversible cis-trans photoisomerization around the azo-bond [1]. The same phenomenon led to the creation of nano-textures using one-beam irradiation on azopolymers [7], to the achievement of a scalable and parallel nano-texturing with a controlled complexity [8] and to new directions in metrology applications [9]. Expanding these results to large areas, fast patterning, and a determistic nano-texturing has not been realized yet. The peculiarity of photoinduced mass transport in an assembly of nanospheres allows ultrafast self-organization into a steep surface relief grating
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
