Table 3.
Parameters | Cuvette experimental data analysis | Laser warming of droplets | |
---|---|---|---|
nd | Refraction index of solutions | 1.333 (water); 1.35553 (egg white) | 1.3554, 55 (droplet) |
na | Refraction index of air | 1.00 | 1.00 |
ra | 1/e2 radius of Gaussian beam (mm) | 0.562 mm * | 1 * |
Io | Laser energy density (W m−2) | * | 1.83×109 * |
PW | Pulse width of laser beam (ms) | − | 0.5* |
Ep | Photon energy at 1064 nm (eV) | 1.211 | 1.211 |
Nphotons | Flux of photons | I0/Ep | I0/Ep |
μt,medium | Extinction coefficient of medium | , Eq. (S9) without GNPs * | − |
μs,medium | Scattering coefficient of medium | 0 (water); or characterized same as GNPs | − |
μt,tot | Attenuation coefficient of GNP solutions | , Eq. (S9) with GNPs * | μa,tot + μs,tot |
μa,tot | Absorption Coefficient of GNP solutions | N * Cabs + μa,medium, Eq. (1) | 5 cm−1** |
μs,tot | Scattering Coefficient of GNP solutions | N * Csca + μs,medium, Eq. (2) | 0.3 cm−1 (GNR) **, 11 cm−1 (GNS) **, or other assume values |
η0 | Photothermal conversion efficiency of GNP | Varied to find experimental fit ** | − |
g | Scattering anisotropy factor | 0 (GNS)56 **; 0.25 (GNR)57 ** | 0 (GNS)56 **; 0.25 (GNR)57 ** |
Measured values
Assumed values. The other unmarked values are either known constants or derived from the measured or assumed values. The choice of scattering anisotropy factors for different GNPs is explained in section S2.2 Part (1).