FullyPrinted Flexible Plasmonic Metafilms with Directional Color Dynamics

Peng, Jialong; Jeong, Hyeon‐Ho; Smith, Michael; Chikkaraddy, Rohit; Lin, Qianqi; Liang, Hsin‐Ling; Volder, Michaël De; Vignolini, Silvia; Kar‐Narayan, Sohini; Baumberg, Jeremy J.

doi:10.1002/advs.202002419

Cited by 21 publications

(36 citation statements)

References 57 publications

(81 reference statements)

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“…Devices made on Au‐coated poly(ethylene terephthalate) substrates showed high quality and durability with no observable damage upon bending (Figure S25, Supporting Information), meeting the requirements of large‐area flexibility for wearable and biomedical electronics. [ 10 ] The fact that the oxidant can also be deposited by printing techniques, such as screen printing, [ 21 ] shows further promise of the UV patterning approach for scalable production of fully printed devices.…”

Section: Resultsmentioning

confidence: 99%

“…[ 2,8 ] Recent efforts to facilitate tuning or on/off switching of structural colors have combined optical nanocavities with conducting polymers, whose optical transparency can be controlled electrochemically. [ 1,9,10 ] The same redox dependence has made conducting polymers popular for electrochromic displays also without cavities, but typically limited to monochromic function. [ 11–13 ] As example, the popular conducting polymer PEDOT (poly[3,4‐ethylenedioxythiophene]) switches only between different shades of blue, while practical applications would preferably also cover other parts of the spectrum.…”

Section: Introductionmentioning

confidence: 99%

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Tunable Structural Color Images by UV‐Patterned Conducting Polymer Nanofilms on Metal Surfaces

et al. 2021

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Precise manipulation of light–matter interactions has enabled a wide variety of approaches to create bright and vivid structural colors. Techniques utilizing photonic crystals, Fabry–Pérot cavities, plasmonics, or high‐refractive‐index dielectric metasurfaces have been studied for applications ranging from optical coatings to reflective displays. However, complicated fabrication procedures for sub‐wavelength nanostructures, limited active areas, and inherent absence of tunability of these approaches impede their further development toward flexible, large‐scale, and switchable devices compatible with facile and cost‐effective production. Here, a novel method is presented to generate structural color images based on monochromic conducting polymer films prepared on metallic surfaces via vapor phase polymerization and ultraviolet (UV) light patterning. Varying the UV dose enables synergistic control of both nanoscale film thickness and polymer permittivity, which generates controllable structural colors from violet to red. Together with grayscale photomasks this enables facile fabrication of high‐resolution structural color images. Dynamic tuning of colored surfaces and images via electrochemical modulation of the polymer redox state is further demonstrated. The simple structure, facile fabrication, wide color gamut, and dynamic color tuning make this concept competitive for applications like multifunctional displays.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Tunable Structural Color Images by UV‐Patterned Conducting Polymer Nanofilms on Metal Surfaces

et al. 2021

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“…Soft plasmonics may have promising applications in wearable biosensors, the Internet of Things, artificial intelligence, and argumentation reality or virtual reality. To date, soft plasmonic materials and devices have exhibited interesting mechanical properties [ 13 ] and novel mechanoplasmonic properties controlled by force, [ 7–12,14–17 ] heat, [ 18–21 ] electrical potential, [ 22,23 ] light, [ 24–27 ] and chemicals. [ 28–30 ] A few earlier review/perspective articles reported until around 2015 described flexible terahertz and optical metasurfaces and metamaterials, as well as flexible nanoplasmonic sensing.…”

Section: Introductionmentioning

confidence: 99%

“…First, a discussion of various bottom‐up and top‐down fabrication methods for soft plasmonic structures and structural/mechanical/optical characterization is included ( Figure ). This is followed by the description of novel soft plasmonic material properties and applications in biological engineering, [ 34 ] flexible sensors, [ 20,35 ] flexible energy [ 36–38 ] /photonic [ 23,39 ] /electric [ 24 ] devices, and soft robotics. [ 40,41 ]…”

Section: Introductionmentioning

confidence: 99%

Soft Plasmonics: Design, Fabrication, Characterization, and Applications

Lü

Cheng

2021

Advanced Optical Materials

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Plasmonic nanostructures are important building blocks in modern nanoscience and nanotechnology. Significant research efforts have been directed toward developing solution‐based or rigid‐substrate‐supported metallic nanostructures for novel applications in biophotonics, sensing, energy, and medicine. In parallel, there has been an increasing interest in the fabrication of plasmonic nanostructures on elastomeric substrates and exploring the impact of mechanical deformation including bending, torsion, and stretching on the collective plasmonic resonance properties. This burgeoning field may be defined as soft plasmonics (or soft mechanoplasmonics), analogous to soft electronics. This review describes the recent progress in the design, fabrication, characterization, properties, and applications of soft plasmonics. Soft plasmonics are expected to afford complementary features and functions to the field of soft electronics, enabling applications that are difficult or impossible to achieve with traditional rigid plasmonic structures, such as conformal attachment or integration with soft biological systems for real‐time sensing, actuation, and close‐loop feedback.

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“…This results in an MIM geometry with gap size set by the thickness of the molecular layer ( d < 2 nm), identical across large areas (>100 cm 2 ). 32 However, access to these hotspots is confounded by the thick nontransparent Au mirror, restricting its utilization.…”

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confidence: 99%

Accessing Plasmonic Hotspots Using Nanoparticle-on-Foil Constructs

Chikkaraddy

Baumberg

2021

ACS Photonics

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Metal–insulator–metal (MIM) nanogaps in the canonical nanoparticle-on-mirror geometry (NPoM) provide deep-subwavelength confinement of light with mode volumes smaller than V / V λ < 10 –6 . However, access to these hotspots is limited by the impendence mismatch between the high in-plane k ∥ of trapped light and free-space plane-waves, making the in- and out-coupling of light difficult. Here, by constructing a nanoparticle-on-foil (NPoF) system with thin metal films, we show the mixing of insulator–metal–insulator (IMI) modes and MIM gap modes results in MIMI modes. This mixing provides multichannel access to the plasmonic nanocavity through light incident from both sides of the metal film. The red-tuning and near-field strength of MIMI modes for thinner foils is measured experimentally with white-light scattering and surface-enhanced Raman scattering from individual NPoFs. We discuss further the utility of NPoF systems, since the geometry allows tightly confined light to be accessed simply through different ports.

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FullyPrinted Flexible Plasmonic Metafilms with Directional Color Dynamics

Cited by 21 publications

References 57 publications

Tunable Structural Color Images by UV‐Patterned Conducting Polymer Nanofilms on Metal Surfaces

Tunable Structural Color Images by UV‐Patterned Conducting Polymer Nanofilms on Metal Surfaces

Soft Plasmonics: Design, Fabrication, Characterization, and Applications

Accessing Plasmonic Hotspots Using Nanoparticle-on-Foil Constructs

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