Journal
ACS NANO
Volume 11, Issue 5, Pages 5031-5040Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsnano.7b01748
Keywords
ultrafast photonics; laser-induced self-organization; nanostructured thin film; plasmonic nanomaterials; plasmonic colors
Categories
Funding
- French Research Agency (ANR) [PHOTOFLEX 12-NANO-0006, ANR-10-LABX-0075, ANR-11-IDEX-0007]
- LiNaBioFluid project (H2020-FETOPEN-RIA) of the European Commission [665337]
- Spanish Ministry of Economy and Competitiveness [TEC2014-52642-C2-1-R]
- Spanish Ministry of Education
- Agence Nationale de la Recherche (ANR) [ANR-10-LABX-0075] Funding Source: Agence Nationale de la Recherche (ANR)
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Controlling plasmonic systems with nano meter resolution in transparent films and their colors over large nonplanar areas is a key issue for spreading their use in various industrial fields. Using light to direct self organization mechanisms provides high-speed and flexible processes to meet this challenge. Here, we describe a route for the laser-induced self-organization of metallic nano structures in 3D. Going beyond the production of planar nanopatterns, we demonstrate that ultrafast laser-induced excitation combined with nonlinear feedback mechanisms in a nanocomposite thin film can lead to 3D self-organized nanostructured films. The process, which can be extended to complex layered composite systems, produces highly uniform large-area nanopatterns. We show that 3D self-organization originates from the simultaneous excitation of independent optical modes at different depths in the film and is activated by the plasmon-induced charge separation and thermally induced NP growth mechanisms. This laser color marking technique enables multiplexed optical image encoding and the generated nanostructured Ag NPs:TiO2 films offer great promise for applications in solar energy harvesting, photocatalysis, or photochromic devices.
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