Responsive Structural Colors Derived from Geometrical Deformation of Synthetic Nanomaterials

Abstract

Figure 1. The geometrical deformation system of nanostructures, including the buckling, straining, and separation of microspheres. Reproduced with permission.

Stimulus-responsive nonclose-packed photonic crystals: fabrications and applications

“…The smart functionalities are realized using responsive building blocks and matrices. 173,174 For example, magnetic field-responsive 1D NPCs can be prepared through the self-assembly of superparamagnetic colloidal particles in water. 78 These 1D NPCs will alter their colors and reflection wavelengths in response to different magnetic field strengths due to the unique capability of nonclosely packed structures with adjustable d s-s .…”

Shape memory photonic materials: fabrication and emerging applications

“…Based on the above-mentioned preparative strategies, SMPMs can be classified into two types: (i) shape memory micro/nano-arrays, prepared by directly micromachining micro/nanostructures onto the surface of bulk SMPs via a lithography technique (top-down approach), and (ii) shape memory photonic composites (SMPCs), prepared through the self-assembly of building blocks (bottom-up approach). 11,89–92…”

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

“…The change of structural color is mainly due to the change of effective refractive index (n eff ) and micro-nano structures of PCs. [98] Among them, 1D PCs are layered structures composed of high (n h ) and low (n l ) refractive index media (polymer or inorganic particles) alternately stacked and assembled in 1D space. The obtained maximum diffraction wavelength (λ max ) and peak intensity (R) of 1D PCs are related to the thicknesses of the two media (d h and d l represent the thicknesses of high and low refractive index media, respectively), satisfying the 1D Bragg equation, [99]…”