C-Dot-Embedded SiO₂ Concentric Microspheres for Bright Fluorescent Photonic Pigments

ACS Applied Materials & Interfaces, Journal Year: 2023, Volume and Issue: 15(28), P. 33848 - 33857

Published: July 3, 2023

A simple yet powerful approach to obtain structural color is the amorphous assembly of colloidal spheres, which also referred as photonic structure or glasses (PGs). Additionally, functionalization spheres building blocks can further endow resulting PGs with multifunctions. Herein, we have developed a facile strategy prepare SiO2 concentrically embedded carbon dots (CDs). Notably, CDs are prepared and silane-functionalized simultaneously, enables perfect incorporation into Si-O network during Stöber reaction thus leads formation concentric SiO2/CD interlayer within obtained spheres. Moreover, be applied pigments by assembling them PGs, exhibit under daylight fluorescence UV illumination. With black, saturation intensity manipulated. Owing combination colored fluorescent CDs, our study offer inspiration for color- fluorescence-related applications such sensing, in vivo imaging, LEDs, anticounterfeiting.

Language: Английский

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Overcoming thermal instability of polymeric Core-Shell-Particles: Advanced processing options for the preparation of Stimuli-Responsive structural color materials

Chemical Engineering Journal, Journal Year: 2023, Volume and Issue: 480, P. 148168 - 148168

Published: Dec. 19, 2023

Core-shell particles (CSP) represent one of the most promising building blocks for artificial production stimuli-responsive materials with iridescent structural colors. Despite tremendous efforts in past two decades, scalable processing options CSP are overall rare and mostly limited to 2D structures form films foils. This work investigates why common large-scale polymer-processing techniques, such as injection molding or fused filament fabrication, hardly applicable state-of-the-art CSP: While rheological prerequisites fulfilled, thermal stability is proven be surprisingly poor. Temperature instability during caused by a thermally induced cross-linking reaction residual reactive moieties. undesired can efficiently suppressed via optimizations particle architecture, terms adjusting core-to-shell ratio number grafting anchors. Thermal further increased upon incorporation primary antioxidants. The theoretical framework feasibility developed solution strategies verified variety thermoanalytical methods, including differential scanning calorimetry, thermogravimetric analysis, well mechanical measurements. Finally, advanced demonstrated conveniently processable at elevated temperatures up 250 °C. These next-generation formulations advantageous established techniques may pave way design new methods suitable industrial use. Potential applications smart sensors, display technologies, anti-counterfeiting materials.

Language: Английский

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Recent progress in low‐swellable polymer‐based smart photonic crystal sensors

Smart Molecules, Journal Year: 2023, Volume and Issue: 1(3)

Published: Dec. 1, 2023

Abstract Low‐swelling polymers (LSPs) generally refer to materials with a low solvent absorption ratio or volume expansion rate at swelling equilibrium. LSPs exceptional responsiveness could be upgraded smart sensors structural color self‐reporting by bridging photonic crystals (PCs). Based on the regulation of effective refractive index, lattice spacing, order‐disorder arrangement nanostructures, and incident/detection angle, feedback crystal (SPCSs) can quantitatively visually reveal stimulus, which greatly promotes interdisciplinary development nanophotonic technology in fields chemical engineering, science, engineering mechanics, biomedicine, environmental etc. Herein, clarify role structures polymer molecules high‐performance SPCSs, LSP‐based SPCSs are summarized discussed, including general mechanisms, change strategies, design, typical functional applications. It aims figure out combination rule between PC LSPs, optimize design structures, expound corresponding sensing inspiring fabrication next‐generation SPCSs. Finally, perspectives future applications also presented. is believed that multifunctional tools for numerous future.

Language: Английский

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Shape memory photonic materials: fabrication and emerging applications

Journal of Materials Chemistry C, Journal Year: 2023, Volume and Issue: 11(37), P. 12466 - 12485

Published: Jan. 1, 2023

Shape memory photonic materials are intelligent optical that have shape abilities and show great potential in various applications, including actuators, visual sensors, anti-counterfeiting labels, smart display units.

Language: Английский

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Characterizing the Microparticles Deposition Structure and its Photonic Nature in Surfactant-Laden Evaporating Colloidal Sessile Droplets

Langmuir, Journal Year: 2024, Volume and Issue: 40(16), P. 8711 - 8720

Published: April 12, 2024

This work presents a simple method to create photonic microstructures via the natural evaporation of surfactant-laden colloidal sessile droplets on flat substrate. In absence dissolved surfactant, evaporating droplet forms well-known coffee ring deposition. contrast, presence surfactant leads formation multiple structures due repetitive pinning-depinning behavior contact line (CL). It is found that multiring structure shows vibrant iridescent structural colors while lacks nature. difference in color for and be dependent arrangement particles deposition structure. The particle multirings monolayered well-ordered. ordering strongly influenced by dynamics, angle (CA), CL dynamics solution droplet. Furthermore, nature demonstrated explained. dependence concentration suspended also studied. findings demonstrate an intermediate desirable Further, causes discussed. Finally, we applicability approach smaller volumes.

Language: Английский

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