A “turn-on” inverse opal photonic crystal fluorescent sensing film for detection of cysteine and its bioimaging of living cells

A facile, low-cost bimetallic iron–nickel MOF nanozyme-propelled ratiometric fluorescent sensor for highly sensitive and selective uric acid detection and its smartphone application

“…5C shows that the FI 430 /FI 565 ratio values were proportional to the logarithmic concentration of UA in the range from 0.2 μM to 200 μM and the LOD was calculated to be 24 nM, which is lower than those in most previously reported works, and the lowest among nanozyme-based ratiometric fluorescent UA sensors reported to date (Table 1). [32][33][34][45][46][47][48] The superior sensitivity can be ascribed to the synergistic effect of the highly efficient fluorescence of the MOF nanozyme and elaborate design of the tandem catalytic system. In contrast, previous works showed UA detection performed solely based on the POD-like activity of nanozymes.…”

Antibody-labeled gold nanoparticle based resonance Rayleigh scattering detection of S100B

“…13,14 Noble metal nanoparticles and non-cross-linking aggregation of CuO nanoparticles have been introduced as probes in RRS methods due to their unique and remarkable physicochemical properties, especially localized surface plasmon resonance. [14][15][16] Our research team achieved quantitative detection of tumor markers epidermal growth factor receptor (EGFR) 17,18 and esophageal cancer cells 19,20 using antibody and aptamer modied gold nanoparticles as probes. Dual-wavelength overlapping resonance Rayleigh scattering (DWO-RRS) is more sensitive and exible than single-wavelength resonance Rayleigh scattering, and can be used for the determination of b-adrenergic blockers, 21 chitosan, 22 and peruorooctane sulfonic acid.…”

A fluorescence-enhanced inverse opal sensing film for multi-sources detection of formaldehyde

“…Particularly, three-dimensional inverse opal (IO) photonic crystals with interconnected microporous structures have been widely employed to construct various sensors based on the changeable reflectance peak, such as organic solvents [22,23], explosives [28], cocaine [29] and staphylococcal enterotoxin [30]. The fluorescence sensors based on IO photonic crystals have also been developed to detect metal ions [31,32], amino acids [33], and microRNAs [34]. For example, our group have constructed highly sensitive and fast response film fluorescence sensors of Bi 2+ [31], Fe 3+ and Hg 2+ [32], and cysteine [33] by combining the optical properties and the structural advantages of IO photonic crystals.…”

“…The fluorescence sensors based on IO photonic crystals have also been developed to detect metal ions [31,32], amino acids [33], and microRNAs [34]. For example, our group have constructed highly sensitive and fast response film fluorescence sensors of Bi 2+ [31], Fe 3+ and Hg 2+ [32], and cysteine [33] by combining the optical properties and the structural advantages of IO photonic crystals. The fluorescence enhancement effect arisen from the slow-photon effect of PC have been utilized to improve the detection sensitivity.…”