A series of mesoporous WO₃ catalysts were facilely synthesized by a hydrothermal method using mesoporous silica KIT-6 as a hard template and silicotungstic acid as a precursor.

Different morphologies of SrTiO₃/TiO₂ heterostructures like nanocubes, nanoparticles, nanospheres, and nanofibers were synthesized via a facile hydrothermal process, using TiO₂ as both a template and precursor in Sr(OH)₂ solution.

Structurally colored fiber was fabricated by an electrophoretic deposition method under a circinate electric field. These fibers exhibit structural color, based on the external field-assembly of charged PMMA microspheres on the surface of the electroconductive carbon fiber, with reflectance spectra stretch-tunable in the 430–608 nm, which are determined by the lattice constants of the photonic crystals. Also, the influence of applied voltage, deposition time and electroconductivity on the number of deposited layers and efficiency were studied. In addition, we further developed a horizontal and continuous process to fabricate a long range structurally colored fiber. And the method is a drastic acceleration in comparison with the gravity sedimentation technique that needs weeks or even months, and it would be fast and facile for the further study of structural color on the surface of the fiber. The process may be used to simulate the conventional fiber coloration process. Such elastically tuned structurally colored fibers are of interest for many applications.

An elastic, structurally colored fiber with reversible structural color is described in this article. Using an external magnetic field, Fe₃O₄@C superparamagnetic colloidal nanocrystal clusters (SCNCs) formed one-dimensional chain-like photonic crystal structures and were embedded in a polyacrylamide matrix. When the fiber was stretched/squeezed in the horizontal direction, the size of the fiber reduced/increased in the vertical direction. As a result, the distance between each sphere in chain-like structures can be reversibly changed through the elastic deformation of the matrix, and the structurally colored fiber displays brilliant colors, ranging from red to green as the mechanical strain changes, which can be clearly observed by the naked eye. The reflection peak can be tuned from 637 nm to 515 nm as a function of fiber extrusion or elongation. The novel structurally colored fiber is expected to have some important applications such as the substitution of some fiber-based wearable electronic strain sensors because this fiber does not require any additional devices to provide energy.

Structural colored fiber was fabricated by an isothermal heating evaporation-induced self-assembly method. Under ambient white light illumination, the fibers appear colored due to optical reflectance, which is determined by the lattice constants of the photonic crystals. By controlling the size and layers of the silica nanospheres, the fiber color can be changed.