- 标题
- 摘要
- 关键词
- 实验方案
- 产品
-
Color Reproduction Accuracy Promotion of 3D-Printed Surfaces Based on Microscopic Image Analysis
摘要： Full-color 3D printing technology is a powerful process to manufacture intelligent customized colorful objects with improved surface qualities; however, poor surface color optimization methods are the main impeding factors for its commercialization. As such, the paper explored the correlation between microstructure and color reproduction, then an assessment and prediction method of color optimization based on microscopic image analysis was proposed. The experimental models were divided into 24-color plates and 4-color cubes printed by ProJet 860 3D printer, then impregnated according to preset parameters, at last measured by a spectrophotometer and observed using both a digital microscope and a scanning electron microscope. The results revealed that the samples manifested higher saturation and smaller chromatic aberration (ΔE) after post-processing. Moreover, the brightness of the same color surface increased with the increasing soaked surface roughness. Further, reduction in surface roughness, impregnation into surface pores, and enhancement of coating transparency effectively improved the accuracy of color reproduction, which could be verified by the measured values. Finally, the chromatic aberration caused by positioning errors on different faces of the samples was optimized, and the value of ΔE for a black cube was reduced from 8.12 to 0.82, which is undetectable to human eyes.
关键词： Structural characterisation,Impregnating process,Scanning electron microscope,Image analysis,Color optimization,Full-color printing
更新于2025-11-21 11:18:25
-
Plasmonic Color Makes a Comeback
摘要： The phenomenon behind the earliest photographs is inspiring new research in color printing and displays. One of the earliest surviving photographs shows the mortuary temple of Pharaoh Ramses II, located in the ancient Egyptian capital of Thebes. The sharp clarity of the image, showing a building with a golden glow framed by a blue sky, gives the impression that it could be a modern snapshot, but the image, now in the Metropolitan Museum of Art, was taken in 1844. Rather than being captured by modern, high-resolution methods, this early photograph, called a daguerreotype, was made by exposing a silver iodide-coated surface to light, creating clusters of elemental silver 1?2 nm in diameter. The image was developed with mercury vapor, forming silver?mercury nanoparticles, which scatter light and create the ?nal scene, embodying a resolution impressive even by today’s standards. Two centuries later, the technology responsible for this earliest of photographs is making a comeback: it is inspiring the next generation of ultra-high-resolution color printing and displays.
关键词： plasmonic color,daguerreotype,displays,nanoparticles,color printing
更新于2025-09-23 15:19:57
-
Generation of High Quality, Uniform and Stable Plasmonic Colorants via Laser Direct Writing
摘要： Brilliant plasmonic colors with long-standing stability are generated via laser direct writing. This plasmonic coloring system is made of silver nanoparticles (Ag NPs) layer embedded in the quartz glass formed by ion implantation. The laser-induced plasmonic heating merges the small Ag NPs into larger ones, which modifies the plasmon resonances. The plasmon resonances can be further tuned via changing the irradiation time and power, which shows scattering colors ranging from red to green and cyan. By scanning the laser across the Ag NPs layer, sophisticated plasmonic patterns and images with high resolution (≈105 DPI) can be obtained and preserved over long time (several months). This plasmonic coloring system via laser printing is facile, cost-effective, accurate, and highly stable with rich hue, compared to other plasmonic color systems, which bears significant potentials for industrial applications such as optics, displays, decorations, data storage, and anti-counterfeiting.
关键词： color printing,photothermal,silver nanoparticles,ion implantation
更新于2025-09-19 17:13:59
-
A Plasmonic Paintera??s Method of Color Mixing for a Continuous Red-Green-Blue (RGB) Palette
摘要： The ability of mixing colors with remarkable results had long been exclusive to the talents of master painters. By finely combining colors at different amounts on the palette, intuitively, they obtain smooth gradients with any given color. Creating such smooth color variations through scattering by the structural patterning of a surface, as opposed to color pigments, has long remained a challenge. Here, we borrow from the painter’s approach and demonstrate color mixing generated by an optical metasurface. We propose a single-layer plasmonic color pixel and a method for nanophotonic structural color mixing based on the additive RGB color model. The color pixels consist of plasmonic nanorod arrays that generate vivid primary colors and enable independent control of color brightness without affecting chromaticity, by simply varying geometric in-plane parameters. By interleaving different nanorod arrays, we combine up to three primary colors on a single pixel. Based on this, two- and three-color mixing is demonstrated, enabling the continuous coverage of a plasmonic RGB color gamut and yielding a palette with a virtually unlimited number of colors. With this multi-resonant color pixel, we show the photorealistic printing of color and monochrome images at the nanoscale, with ultra-smooth transitions in color and brightness. Our color mixing approach can be applied to a broad range of scatterer designs and materials, and has the potential to be used for multi-wavelength color filters and dynamic photorealistic displays.
关键词： plasmonic color,nanophotonics,plasmonic lattice,color-printing,nanoantenna,structural color
更新于2025-09-16 10:30:52
-
Plasmonic Color Laser Printing inside Transparent Gold Nanodisk‐Embedded Poly(dimethylsiloxane) Matrices
摘要： Plasmonic color generation from metal nanostructures has attracted intensive attention because of their excellence in achieving high spatial resolution, strong color contrast, and long-term durability. The limited area of plasmonic patterns anchored on substrates and produced by current top-down methods, however, severely restricts the advanced developments and potential applications in structural color display. Herein a robust method for realizing the laser printing of plasmonic colors inside transparent gold nanodisk-embedded poly(dimethylsiloxane) matrices is presented. It is found that various colors can not only be easily generated by embedding gold nanodisks of different sizes, but also finely varied by adjusting the laser pulse intensity during printing. It is further demonstrated that multiple color layers can be laser-printed at different depths. Stereoscopic images in the 3D matrices are laser-printed with sizes as large as 12 × 15 mm2 and a resolution of 4600 dots per inch.
关键词： laser color printing,plasmonic colors,poly(dimethylsiloxane),gold nanodisks,plasmons
更新于2025-09-16 10:30:52
-
[IEEE 2019 IEEE 32nd International Conference on Micro Electro Mechanical Systems (MEMS) - Seoul, Korea (South) (2019.1.27-2019.1.31)] 2019 IEEE 32nd International Conference on Micro Electro Mechanical Systems (MEMS) - Diversified and Precise Plasmonic Color Tuning by Three-Dimensional Air-Gap Nanocavities
摘要： We report a new arrayed three-dimensional (3D) air-gap nanocavities with multiple tunable geometrical parameters. Light is tightly confined into the nanocavities and strong surface-plasmon coupling is introduced, realizing narrow band resonance. Vivid plasmonic colors are generated, and can be tuned by multiple geometrical parameters of the 3D nanocavities, including shapes, separations, and heights. What’s more, the surface-plasmon coupling resonance has different dependence on different variable geometrical parameters. So, multi-dimensional color tuning with different spectral sensitivities is realized by proper and precise structural design, leading to both broad gamut and sophisticated plasmonic color printing at the optical diffraction limit.
关键词： plasmonic color tuning,surface-plasmon coupling,color printing,optical diffraction limit,3D air-gap nanocavities
更新于2025-09-12 10:27:22
-
Simultaneous Spectral and Spatial Modulation for Color Printing and Holography Using All-Dielectric Metasurfaces
摘要： Metasurfaces possess the outstanding ability to tailor phase, amplitude and even spectral responses of light with an unprecedented ultrahigh resolution, thus have attracted significant interests. Here, we propose and experimentally demonstrate a novel meta-device that integrates color printing and computer-generated holograms within a single-layer dielectric metasurface by modulating spectral and spatial responses at subwavelength scale, simultaneously. In our design, such metasurface appears as a microscopic color image under white light illumination, while encrypting two different holographic images that can be projected at the far-field when illuminated with red and green laser beams. We choose amorphous silicon dimers and nanofins as building components, and use a modified parallel Gerchberg-Saxton algorithm to obtain multiple sub-holograms with arbitrary spatial shapes for image-indexed arrangements while avoiding the loss of phase information. Such a method can further extend the design freedom of metasurfaces. By exploiting spectral and spatial control at the level of individual pixels, multiple sets of independent information can be introduced into a single-layer device, the additional complexity and enlarged information capacity are promising for novel applications such as information security and anti-counterfeiting.
关键词： spectral and spatial modulation,color printing,meta-hologram,all-dielectric metasurface
更新于2025-09-12 10:27:22