Graphene-oxide/TiO2 nanocomposite films with electron-donors for multicolor holography
| Autor: | Shencheng Fu, Xintong Zhang, Xinnong Wang, Meiying Li, Yichun Liu, Lihong Kang, Jiarui Wu |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Nanocomposite
Materials science business.industry Graphene Holography Oxide 02 engineering and technology 021001 nanoscience & nanotechnology Diffraction efficiency 01 natural sciences Atomic and Molecular Physics and Optics law.invention 010309 optics chemistry.chemical_compound Photochromism Optics chemistry law 0103 physical sciences Optoelectronics 0210 nano-technology business Diffraction grating Visible spectrum |
| Zdroj: | Optics Express. 27:1740 |
| ISSN: | 1094-4087 |
| DOI: | 10.1364/oe.27.001740 |
| Popis: | Graphene oxide (GO) with an ideal two-dimensional structure, presents outstanding optical, electric, and mechanical properties which draws great attention in advanced information devices. Recently, GO-based films were found to show photochromic behavior, especially for the TiO2 involved system which has potential data processing capability, such as storing holograms. However, expanding spectral response range and increasing exposure sensitivity are still challenges for such a film, due to the limited photo-quantum efficiency in reduction reaction. Here, an innovative method of “Immersion-Dropping” technology is proposed to fabricate GO-based continuous films. We, for the first time, achieve colored holography from violet to yellow regions on GO/TiO2 nanocomposite films with introduction of weak acid molecules. A “diffraction self-enhancement” is observed. The obtained results benefit from the broadband photo-response of weak acid molecules and photo-triggered transferring of electrons in multi-channels. This work provides a research strategy for the large-capacity information storage and colorful display device. |
| Databáze: | OpenAIRE |
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