TABLE I.
The characterization of microparticles.
| No. | Type | Particle diameter (μm) | Dispersion medium | Core material | Shell material | Surface modification | Excitation wavelength | Emission wavelength |
|---|---|---|---|---|---|---|---|---|
| 1 | Nonmagnetic | 3, 5 | Deionized watera | … | Polystyrene | -COOH | … | … |
| 2 | Nonmagnetic fluorescent | 3, 5 | Deionized watera | … | Polystyrene | -Europium | 350–370 nm | 615 ± 5 nm |
| 3 | Magnetic | 3, 5 | Deionized watera | Fe3O4 | Polystyrene | -COOH | … | … |
| 4 | Magnetic fluorescent | 3, 5 | Deionized watera | Fe3O4 | Polystyrene | -Europium | 350–370 nm | 615 ± 5 nm |
a
0.01% 2-Methyl-4-Isothiazolin-3-one (MIT, C4H5NOS) is added into de-ionized water.