Eine optisch programmierbare Oberfläche realisiert mit einen Azobenzol-funktionalisiertem Lotusblatt und OLEDs
| Autor: | Andre F. K. Iwers, Matthias Bremer, Martina Gerken, Christine Kallweit |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
schaltbar
Materials science ddc:621.3 Technische Fakultät 02 engineering and technology 010402 general chemistry Azobenzol 01 natural sciences Optical switch chemistry.chemical_compound Photochromism lotus Monolayer OLED ddc:6 switchable Lotus effect Electrical and Electronic Engineering Polydimethylsiloxane business.industry Faculty of Engineering article OLED azobenzene lotus switchable 021001 nanoscience & nanotechnology Atomic and Molecular Physics and Optics 0104 chemical sciences Electronic Optical and Magnetic Materials azobenzene chemistry Azobenzene Optoelectronics 0210 nano-technology business Biosensor |
| Zdroj: | IEEE Photonics Technology Letters.-Piscataway, NJ : IEEE Photonics Society; 2018.-S.673-676. |
| ISSN: | 1941-0174 1041-1135 |
| DOI: | 10.1109/lpt.2018.2811041 |
| Popis: | Spatially programmable surface properties are important building blocks for future microfluidic and biosensor devices. We demonstrate switching of a photochromic surface with a blue organic light-emitting diode (OLED) suitable as an integrated on-chip light source. The surface of a positive polydimethylsiloxane replica of a fresh lotus leaf is covalently functionalized with a photoswitchable azobenzene self-assembled monolayer employing “click chemistry.” 80% of the azobenzene molecules are switched from cis to trans state within 4 min of OLED irradiation. A spatially resolved study of the azobenzene switching properties on the naturally inhomogeneous lotus surface is conducted evaluating the transmission of a 355-nm laser beam. In the area of the leaf veins the highest change in the relative transmission of 100% is obtained upon switching from trans form to cis form under UV illumination. In comparison, an azobenzene-functionalized flat glass surface exhibits only a 0.5% change in the relative transmission. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|