Sensitization of nanocrystalline TiO2 with 3,4,9,10-perylene tetracarboxylic acid

Vincenzo Turco Liveri, Pietro Calandra, Fortunato Neri, Enza Fazio, Leone

Risultato della ricerca: Article

1 Citazione (Scopus)

Abstract

Optical properties of 3,4,9,10-perylene tetracarboxylic acid (PTCA) in the presence of nanocrystalline TiO2 (nominal diameter 15 nm) have been investigated in ethanol solution and in the solid state by UV–Vis absorption spectroscopy and steady-state and time-resolved fluorescence. Experimental results show that, in ethanol, the presence of TiO2 nanoparticles causes significant changes in the typical absorption and fluorescence bands of PTCA and in the fluorescence relaxation time. Similar effects are also detected in solid samples, obtained by electrospray deposition technique. The nonlinear optical properties of the PTCA–TiO2 in ethanol solutions were investigated using the single-beam Z-scan techniques at 532 nm. It was found that, at high TiO2 nanoparticles content, PTCA exhibits a reverse saturable absorption with significant nonlinear absorption and intensity-dependent negative nonlinear refractive coefficient, indicating self-defocusing behaviour. The thirdorder nonlinear susceptibility and optical limiting threshold were also determined. Data analysis leads consistently to attribute the observed behaviours to chemical adsorptionofPTCAto theTiO2 surface both in liquid and solid samples. Potentialities of these novel luminescent nanostructured composites as components of dye-sensitized solar cells or components where the nonlinear optical behaviour is requested have been highlighted.
Lingua originaleEnglish
pagine (da-a)1-10
Numero di pagine10
RivistaJournal of Nanoparticle Research
Volume2495
Stato di pubblicazionePublished - 2014

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Perylene
TiO2
Ethanol
ethyl alcohol
Optical Properties
Fluorescence
acids
Acids
Optical properties
Optical Limiting
Nonlinear Absorption
optical properties
fluorescence
Absorption Spectroscopy
defocusing
Dyes
Absorption spectroscopy
Susceptibility
Nanoparticles
Categorical or nominal

All Science Journal Classification (ASJC) codes

  • Bioengineering
  • Condensed Matter Physics
  • Materials Science(all)
  • Modelling and Simulation
  • Chemistry(all)
  • Atomic and Molecular Physics, and Optics

Cita questo

Sensitization of nanocrystalline TiO2 with 3,4,9,10-perylene tetracarboxylic acid. / Turco Liveri, Vincenzo; Calandra, Pietro; Neri, Fortunato; Fazio, Enza; Leone.

In: Journal of Nanoparticle Research, Vol. 2495, 2014, pag. 1-10.

Risultato della ricerca: Article

Turco Liveri, Vincenzo ; Calandra, Pietro ; Neri, Fortunato ; Fazio, Enza ; Leone. / Sensitization of nanocrystalline TiO2 with 3,4,9,10-perylene tetracarboxylic acid. In: Journal of Nanoparticle Research. 2014 ; Vol. 2495. pagg. 1-10.
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abstract = "Optical properties of 3,4,9,10-perylene tetracarboxylic acid (PTCA) in the presence of nanocrystalline TiO2 (nominal diameter 15 nm) have been investigated in ethanol solution and in the solid state by UV–Vis absorption spectroscopy and steady-state and time-resolved fluorescence. Experimental results show that, in ethanol, the presence of TiO2 nanoparticles causes significant changes in the typical absorption and fluorescence bands of PTCA and in the fluorescence relaxation time. Similar effects are also detected in solid samples, obtained by electrospray deposition technique. The nonlinear optical properties of the PTCA–TiO2 in ethanol solutions were investigated using the single-beam Z-scan techniques at 532 nm. It was found that, at high TiO2 nanoparticles content, PTCA exhibits a reverse saturable absorption with significant nonlinear absorption and intensity-dependent negative nonlinear refractive coefficient, indicating self-defocusing behaviour. The thirdorder nonlinear susceptibility and optical limiting threshold were also determined. Data analysis leads consistently to attribute the observed behaviours to chemical adsorptionofPTCAto theTiO2 surface both in liquid and solid samples. Potentialities of these novel luminescent nanostructured composites as components of dye-sensitized solar cells or components where the nonlinear optical behaviour is requested have been highlighted.",
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AU - Turco Liveri, Vincenzo

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AU - Fazio, Enza

AU - Leone, null

PY - 2014

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N2 - Optical properties of 3,4,9,10-perylene tetracarboxylic acid (PTCA) in the presence of nanocrystalline TiO2 (nominal diameter 15 nm) have been investigated in ethanol solution and in the solid state by UV–Vis absorption spectroscopy and steady-state and time-resolved fluorescence. Experimental results show that, in ethanol, the presence of TiO2 nanoparticles causes significant changes in the typical absorption and fluorescence bands of PTCA and in the fluorescence relaxation time. Similar effects are also detected in solid samples, obtained by electrospray deposition technique. The nonlinear optical properties of the PTCA–TiO2 in ethanol solutions were investigated using the single-beam Z-scan techniques at 532 nm. It was found that, at high TiO2 nanoparticles content, PTCA exhibits a reverse saturable absorption with significant nonlinear absorption and intensity-dependent negative nonlinear refractive coefficient, indicating self-defocusing behaviour. The thirdorder nonlinear susceptibility and optical limiting threshold were also determined. Data analysis leads consistently to attribute the observed behaviours to chemical adsorptionofPTCAto theTiO2 surface both in liquid and solid samples. Potentialities of these novel luminescent nanostructured composites as components of dye-sensitized solar cells or components where the nonlinear optical behaviour is requested have been highlighted.

AB - Optical properties of 3,4,9,10-perylene tetracarboxylic acid (PTCA) in the presence of nanocrystalline TiO2 (nominal diameter 15 nm) have been investigated in ethanol solution and in the solid state by UV–Vis absorption spectroscopy and steady-state and time-resolved fluorescence. Experimental results show that, in ethanol, the presence of TiO2 nanoparticles causes significant changes in the typical absorption and fluorescence bands of PTCA and in the fluorescence relaxation time. Similar effects are also detected in solid samples, obtained by electrospray deposition technique. The nonlinear optical properties of the PTCA–TiO2 in ethanol solutions were investigated using the single-beam Z-scan techniques at 532 nm. It was found that, at high TiO2 nanoparticles content, PTCA exhibits a reverse saturable absorption with significant nonlinear absorption and intensity-dependent negative nonlinear refractive coefficient, indicating self-defocusing behaviour. The thirdorder nonlinear susceptibility and optical limiting threshold were also determined. Data analysis leads consistently to attribute the observed behaviours to chemical adsorptionofPTCAto theTiO2 surface both in liquid and solid samples. Potentialities of these novel luminescent nanostructured composites as components of dye-sensitized solar cells or components where the nonlinear optical behaviour is requested have been highlighted.

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