Colloidal Photonic Crystal Sensors

Smart Nanostructured Materials for SARS-CoV-2 and Variants Prevention, Biosensing and Vaccination

“…The k and λ are diffraction order and wavelength of diffracted light. Based on this simple equation, it can be predicted that the structural color and diffracted light wavelength are determined by the physical properties of the photonic crystals and surroundings, which can be used to design responsive photonic crystals for detecting virus and biological species [ 158 , 159 , 160 , 161 , 162 , 163 , 164 ]. Two of the most used strategies in this regard include the changes of surrounding dielectrics and control over the periodicity of the photonic crystals [ 165 ].…”

Low-voltage and wide-tuning-range SiO2/aniline electrically responsive photonic crystal fabricated by solvent assisted charge separation

“…Various stimuli, including electric field, [1][2][3][4][5][6][7] magnetic field, [8][9][10][11] thermal interaction, [12][13][14] mechanical force, [15][16][17] and the chemical environment, [18][19][20][21][22][23][24] are capable of changing the color of photonic crystals. Considering the feasibility of controlling the electric field on a miniaturized scale, an electrically responsive photonic crystal (ERPC) was an ideal system for realizing instant and accurate tuning of colors.…”

Stimuli-responsive one-dimensional photonic crystals: design, fabrication and sensing

“…Photonic crystals (PCs) are ideal candidates for the fabrication of such colorimetric sensors, as they can be used for gas sensing and the detection of other external stimuli alike. [18][19][20] They are label-free, can exhibit quick response times, and their fabrication as well as functionalization is facile. 21 In general, PCs are comprised of two dielectric materials (including air) with different refractive indices (RIs) and show optical band structures characterized by photonic bandgaps.…”

“…Photonic crystals (PCs) are ideal candidates for the fabrication of such colorimetric sensors, as they can be used for gas sensing and the detection of other external stimuli alike. 18–20 They are label-free, can exhibit quick response times, and their fabrication as well as functionalization is facile. 21…”