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Enhanced Absorption in a Reverse Saturable Absorbing Dye Blended With Carbon Nanotubes

Enhanced Absorption in a Reverse Saturable Absorbing Dye Blended With Carbon Nanotubes

Scott Webster, Marisol Reyes-Reyes, Richard Williams, David L Carroll

J Nanosci Nanotechnol. 2008 Dec;8(12):6470-3.

PMID: 19205224

Abstract:

Using nonlinear absorption at 532 nm in the nanosecond temporal regime, we have measured the low fluence nonlinear transmittance properties of the reverse saturable absorbing carbocyanine dye, 1,1',3,3,3',3'-hexamethylindotricarbocyanine iodide (HITCI), blended with well dispersed carbon nanotubes. The nonlinear optical properties of the blends are strongly dependent on the ratio of dye to nanotubes in solution. In the case where the nanotubes per dye molecule ratio is large, we see a distinctive enhancement in optical fluence limiting properties of the system, suggesting enhanced absorption of the excited states. However, when the nanotube to dye ratio decreases, the system's response is dominated by the behavior of the dye. We suggest that this can be understood as a two component system in which sensitized dye molecules associated with the nanotubes have an effectively different optical cross-section from the dye molecules far from the nanotubes. From classical antennae considerations, this is expected.

Chemicals Related in the Paper:

Catalog Number	Product Name	Structure	CAS Number	Price
AP19764966	1,1′,3,3,3′,3′-Hexamethylindotricarbocyanine iodide		19764-96-6	Price

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