Table 3. Single exponential fit using model F(t) = C1*exp(-x*k1) + y0 for each decay curve of EGF at a power slit size of 0.5 mm and 0.8 mm (corresponding to 0.30 μW and 1.67 μW, respectively) and double exponential fit using model F(t) = y0+C1*exp(-k1*x)+C2*exp(-k2*x) for each decay curve of EGF at a power slit size of 1.2 mm and 2.0 mm (corresponding to 2.34 μW and 4.40 μW, respectively) (see Fig 4A).
For slit 0.1 mm (0.12 μW), a linear model was selected. Fit parameters are displayed in this table. R2 stands for Adjusted R- Square.
| Slit(mm) | Decay Parameters | Statistic | ||||
|---|---|---|---|---|---|---|
| y0 | C1 | C2 | k1 | k2 | R2 | |
| 0.1 | 1.8 E+4±1.1E+1 | -0.16±2.7E-3 | - | - | - | 0.921 |
| 0.5 | 5.7E+4±1.2E+2 | 6.2E+4±1.0E+2 | - | 3.0E+4±1.5E+1 | - | 0.999 |
| 0.8 | 7.7E+4±2.0E+2 | 1.2E+5±2.4E+2 | - | 2.2E+3±1.3E+1 | - | 0.999 |
| 1.2 | 5.8E+4±1.1E+4 | 9.0E+4±5.6E+3 | 1.2E+5±5.5E+3 | 7.9E+3±2.1E+3 | 1.2E+3±3.7E+1 | 0.999 |
| 2.0 | 9.8E+4±1.8E+3 | 2.2E+5±1.3E+3 | 1.2E+5±6.4E+2 | 6.8E+2±4.9 | 5.1E+3±2.1E+2 | 0.999 |