Resonance energy transfer (RET) describes the process that is transferred from an excited donor to acceptor molecule, leading a reduction in fluorescence emission intensity of and increase acceptor. By this technique, measurements with good sensitivity can be made about distance within 1 10 nm under physiological conditions. For reason, RET technique has been widely used polymer science, biochemistry, structural biology. Recently, number systems incorporated nanoparticles, such as quantum...

Inspired by the brilliant and tunable structural colors based on large refractive index contrast (Δn) non-close-packing structures of chameleon skins, ZnS-silica photonic crystals (PCs) with highly saturated adjustable are fabricated. Due to Δn structure, PCs show 1) intense reflectance (maximal: 90%), wide bandgaps, peak areas, 2.6-7.6, 1.6, 4.0 times higher than those silica PCs, respectively; 2) simply adjusting volume fraction particles same size, more convenient conventional way...

Abstract Mechanochromic photonic crystals are attractive due to their force-dependent structural colors; however, showing unrecordable color and unsatisfied performances, which significantly limits development expansion toward advanced applications. Here, a thermal-responsive mechanochromic crystal with multicolor recordability-erasability was fabricated by combining non-close-packing phase-change materials. Multicolor recordability is realized pressing obtain target colors over the...

Fluorescent photonic crystals (FPCs) are ideal candidates for regulating dyes' fluorescence through their unique band gaps (PBGs). However, challenges, including the lack of dynamic regulation fluorescence, dye release in solvents, and instability, dramatically limit practical applications. Here, we report mechanochromic solvomechanochromic rhodamine B (RhB)-based FPCs with photoluminescence (PL) by stretching swelling, brilliant fluorescent structural colors, no RhB solvents. The...

An efficient and straightforward method is developed to prepare a mechanochromic photonic gel by fixing the metastable SiO 2 colloidal crystalline array (CCA) in mixture of ethylene glycol (EG) poly(ethylene glycol) methacrylate (PEGMA) through photopolymerization. Thanks recent fabrication solvent‐wrapped, CCA, high volume fraction EG (46%) introduced before particle assembly, but not swelling after polymerization, which leads more deformable composite than most reported opal gels. Compared...

A chelation-assisted palladium-catalyzed ortho-cyanation of the sp2 C−H bond by CuCN provided aromatic nitriles in moderate to good yields. Notably, reaction could be conducted on a 10 mmol scale. The key intermediate natural product Menispermum dauricum DC was concisely synthesized procedure. This new approach represents an exceedingly practical method for synthesis and offers attractive alternative traditional Sandmeyer reaction.

Nanomedicine has attracted substantial attention for the accurate diagnosis or treatment of carcinoma in recent years. Nd3+-doped lanthanide nanophosphor-based near-infrared-II (NIR-II) optical imaging is widely used deep penetration tissue while X-ray computed tomography (CT) well-suited vivo imaging. Polymer-coated nanophosphors are increasingly both diagnostics and therapies tumor vivo. However, biocompatibility nanocomposites efficiency ablation should be taken into consideration when...

Solvent wrapped "metastable" crystalline colloidal arrays (CCAs) have been prepared by supersaturation induced precipitation and self-assembly of monodisperse particles in polar/nonpolar organic solvents. These metastable CCAs possess ordered structures but with less stability comparing traditionally fixed crystal systems. They are stabilized the balance between long-range attraction electrostatic repulsion neighboring like-charged particles. Monitoring reflection intensity during...

This review focuses on the introduction, fabrication, and applications of amorphous photonic crystals.

The skins of chameleons have attracted growing interest because they sensitive mechano-chromic properties and bright colors due to the large surface-to-surface distances (Ds-s) between neighboring particles contrast refractive index (Δn), respectively. Inspired by these, artificial photonic (MPSs) mimicking those were fabricated Δn Ds-s. fabrication is considerably simple efficient based on self-assembly strategy using commercial chemicals materials. reflectance MPSs depends value Δn, which...

Abstract The conventional thermochromic photonic crystal (TPC) gels based on thermally responsive poly( N ‐isopropyl acrylamides) can switch their reflection signals at different temperatures by changing lattice distances or order degree. However, these TPC exhibit a poor sensing range of temperature ( Δ T < 30 ° C) and antideformation properties, significantly limiting applications. Here, new type liquid transparent is fabricated through assembling silica particles into the mixture...

Abstract It is challenging for traditional smart windows to possess both high optical transparency (90%, 380–780 nm) and brilliant colors since they are usually contradictory each other. Here, novel liquid thermal‐responsive (TSWs) exhibiting (94%), bright iridescent forward scattering structural color, extremely weak reflective fabricated by constructing a refractive index (RI)‐matched non‐close‐packing ordered structure with large lattice distances thus unique light diffraction mechanisms....

Abstract Fabricating photonic crystals (PCs) with dynamic multi‐stimuli‐responsive structural colors, recordable and self‐healable properties is significant for their emerging applications, yet remains a big challenge. Here, an all‐in‐one multifunctional PC (MFPC) film outstanding mechanochromic, thermochromic, solvatochromic, color/shape‐recordable, self‐healable, adhesive functions designed prepared by simply non‐close‐assembling silica particles into the unique...

A chelation-assisted palladium-catalyzed cascade bromination/cyanation reaction of 2-arylpyridine and 1-arylpyrazole C−H bonds has been developed. Notably, the employs K3[Fe(CN)6] as a safe nontoxic cyanide source, providing aromatic nitriles in moderate to good yields one-pot. The procedure tolerates methoxy, chloro, fluoro, cyano, trifluoromethyl, carbomethoxy groups.

Abstract Photonic prints integrated with invisible and reconfigurable patterns are highly desired due to their potential applications in combining anti‐counterfeiting, anti‐photobleaching, low‐resource consuming. Here, a simple fast approach is reported fabricate photonic prints, which prepared by coating layer of oleylamine (OAm) on the selective region hydrophilic paper. Owing different wettability swelling ability between pattern background regions, as‐prepared sample (Δλ = 0) at normal...

A novel hybrid hydrogel system composed of CdTe QDs and SiO 2 PCs was developed for optical anti-counterfeiting information encoding–decoding.

Retroreflective structural colors can usually be achieved based on interference combined with a total internal reflection mechanism or diffraction of monolayer hexagonal two-dimensional (2D) colloidal array. Here, novel retroreflective color was generated hexagonal-parallelogram lattice transformation by stretching 3D photonic crystals nonclosely packed long-range order. Compared to previous colors, this new exhibits two unique off/on switches: (1) strain-dependent switch along the direction...

Similar to chameleon skins, colloidal mechanochromic photonic crystals (MPCs) have been receiving increasing attention due their capability of adjusting colors by force. However, applications are hindered poor sensitivity (<1 nm/kPa or nm/%), responsiveness nm/ms), and tuning range wavelength (Δλ < 180 nm), mainly the small surface-to-surface distance (Ds-s) between neighboring particles. Here, we fabricated supersensitive SiO2/water-hydroxyethyl acrylate MPC hydrogels with large Ds-s thus...

Printable colloidal photonic crystals (CPCs) with unique bandgaps and elaborate shapes have attracted significant interest due to their characteristics, such as simplicity of fabrication, adjustable structural colors, photobleaching resistance, stimulus‐responsiveness. In this review, strategies for printing CPC patterns, including direct use CPCs inks, region‐selective modification on responsive (solvent, force, temperature) papers, combined lithography, are first summarized. Second, based...