Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 9, Issue 29, Pages 25057-25061Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsami.7b07693
Keywords
plasmonic; anodic aluminum oxide (AAO); confinement; liquid crystals; switchable
Funding
- National Research Foundation (NRF) - Korean Government (MOE) [2014S1A2A2027911, 2014M3C1A3052537]
- National Research Foundation (NRF) - Korean Government (MSIP) [2014S1A2A2027911, 2014M3C1A3052537]
- National Research Foundation of Korea [2014S1A2A2027911] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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Structural coloration using plasmonic particles has received substantial attention due to its robust, permanent, and scalable characteristics across; the full color range. In this study, a plasmonic structure based on a porous anodic aluminum oxide (AAO) film coated with a metallic film was fabricated. Colors were varied by changing the refractive index, which was achieved with a convolution with nanopores of AAO film and an infiltrated liquid crystal (LC) material. LC molecules confined in the porous AAO film were uniformly aligned, and they exhibited pore-size-dependent colors because of the specific refractive index. The thermal phase transition of the LC material in the nanopores changed the effective refractive index, switching the reflected colors, and the LC-infiltrated AAO remained stable over a month. We believe LC materials can extend the, use of rigid conventional plasmonic structures from simple sensor applications to multifunctional uses such as color printing, writing pens, and displays.
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