Major TRF platform product
FNBE fluorescent nanobeads
Based on Eu³⁺ rare-earth chelate chemistry, FNBE nanobeads provide long fluorescence lifetime, low background, large Stokes shift and robust coupling for time-resolved lateral flow, TRFIA, multiplex detection and substitution evaluation.
365 / 610 nmExcitation / emission
100-1000 μsLong lifetime window
PDI < 0.1Particle distribution and lot stability
Core specifications
| Models | FNBE-200 / FNBE-300 / FNBE-500, with customizable particle sizes from 100-800 nm. |
|---|---|
| Surface groups | COOH / NH₂ / SA / customized groups for different coupling strategies. |
| Optical profile | 365 nm excitation and 610 nm emission; Stokes shift about 245 nm to reduce background interference. |
| Fluorescence lifetime | 100-1000 μs, suitable for time-resolved detection windows and improved signal-to-noise ratio. |
| Storage and package | Store at 2-8°C protected from light; available in 0.5 / 1 / 5 mL packages. |
Applications
TRFICA strips
For high-sensitivity rapid test development and lateral flow readout.
TRFIA development
Long lifetime fluorescence and low background support quantitative assay setup.
Multiplex assays
Particle size, surface group and labeling strategy can support multi-target detection design.
Substitution evaluation
Performance, coupling and stability comparison against existing fluorescent bead systems.
Measured evidence
Selection considerations
| Coupling target | Antibody, antigen, streptavidin systems and other molecules influence surface group selection. |
|---|---|
| Detection platform | Reader type, strip structure, lateral flow materials and reaction time all affect bead selection. |
| Performance goals | Sensitivity, background, linear range, lot stability and accelerated stability jointly determine bead suitability. |