Table 2 Theoretically calculated values of the surface-to-volume ratio (S/v), absorption ratio (α), temperature increase (T − T0), and time constant (γS/ρcv) for viruses, bacteria (unstained-, safranin-stained and rhodamine B-stained E. coli), and human red blood cells.

From: Transient photothermal inactivation of Escherichia coli stained with visible dyes by using a nanosecond pulsed laser

 

Virus

E. coli unstained

E. coli safranin

E. coli rhodamine

Red blood cells

S/v (cm−1)

1.5 × 106

8 × 104

8 × 104

8 × 104

2 × 104

α

0.001 (650 nm)

0.002

0.004

0.018

0.001 (650 nm)

Temp. increase (K)

1780

190

380

1710

24

Time constant (Hz)

36,000

1900

1900

1900

475

  1. To obtain a quantitative comparison, the laser intensity was assumed to be 50 W/cm2; repetition rate, 10 Hz; density 1.0 g/cm3; and specific heat, 4.2 J/g K, for all the organic structures.
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