Pure optical and reversible optically driven nanowriting of azobenzene block copolymers
Authors: Tantussi F., Menghetti S., Caldi E., Fuso F., Allegrini M., Galli G.
Autors Affiliation: Dipartimento di Fisica Enrico Fermi, Universita` di Pisa, Largo Pontecorvo 3, 56127 Pisa, Italy;
CNISM, Largo Pontecorvo 3, 56127 Pisa, Italy;
Dipartimento di Chimica e Chimica Industriale, Universita` di Pisa, Via Risorgimento 35, 56126 Pisa, Italy;
INO-CNR, Sezione di Pisa, Largo Pontecorvo 3, 56127 Pisa, Italy;
INSTM-UdR Pisa, Via Risorgimento 35, 56126 Pisa, Italy
Abstract: We report on pure optical nanowriting in the near-field of spin-coated films of a specifically synthesized azobenzene-containing block copolymer. Writing is accomplished by linear polarized blue laser radiation, which is efficiently absorbed by the material, and readout is based on polarization-modulation of red laser radiation, which is practically unabsorbed. Purely optical, stable, and reversible modifications are observed at the similar to 100 nm scale. Remarkably, they are not accompanied by any observable topographical change. We attribute the result to the use of a small azobenzene content (3% mol) and to the block architecture of the material. (C) 2012 American Institute of Physics.
Journal/Review: APPLIED PHYSICS LETTERS
Volume: 100 (8) Pages from: 083103 to: 083103
More Information: The work was performed with financial support from the Regione Toscana, POR ob. 3 Misura D4. Partial support from NanoSciE + through the project E2-PLAS and from MIUR through PRIN 2008J858Y7 is gratefully acknowledged.DOI: 10.1063/1.3685716Citations: 10data from “WEB OF SCIENCE” (of Thomson Reuters) are update at: 2019-09-15References taken from IsiWeb of Knowledge: (subscribers only)Connecting to view paper tab on IsiWeb: Click hereConnecting to view citations from IsiWeb: Click here