2026-06-27T15:57:14Zhttps://docta.ucm.es/rest/oai/request

oai:docta.ucm.es:20.500.14352/982732025-03-18T11:49:58Zcom_20.500.14352_14col_20.500.14352_15

Abdallah, Stephania Mhanna, Rana Cabrera González, Justo Enrique Núñez, Rosario Khitous, Amine Morlet-Savary, Fabrice Soppera, Olivier Versace, Davy-Louis Malval, Jean-Pierre 2024-02-02T12:43:28Z 2024-02-02T12:43:28Z 2023-08-14 10.1021/acs.chemmater.3c01249 https://hdl.handle.net/20.500.14352/98273 https://doi.org/10.1021/acs.chemmater.3c01249 Two-photon polymerization (2PP) constitutes a powerful light-triggered 3D stereolithography, allowing the fabrication of micro- or nanostructures with spatially encoded functionalities. In the present report, we take advantage of this programmable property in order to develop a photoresist authorizing the direct 2PP-lithography of luminescent switchable μ-structures. In this single step processing method, we highlight the pivotal role of a quadrupolar o-caborane initiator comprising a 9, 10-disubstituted anthracene core capable of chemically entrap oxygen-inhibiting species during the free radical two-photon initiation step. Such an O2 sequestration approach not only enhances the two-photon initiation performance of the polymerization, but also generates a non-luminescent endoperoxide by-product embedded in the polymerized macrostructure. Interestingly, simple heating of the final materials promotes endoperoxide thermolysis, resulting in the recovery of the luminescent o-carborane dye. This original luminescence turn OFF/ON property exhibits excellent fatigue resistance through a large number of alternated thermal and light stimuli cycles. The potential of this direct laser writing strategy for reversible data storage applications is finally demonstrated by the two-photon patterning of a series of matricially organized μ-structures used as rewritable binary optical memories which can be easily encoded on demand. eng restricted access Reversible Optical Data Storage via Two-Photon Micropatterning of o‑Carboranes-Embedded Switchable Materials journal article