Investigation of heating effects in near-field experiments with luminescent organic semiconductors (Articolo in rivista)

Type

• Prodotto della ricerca (Classe)
• Articolo in rivista (Classe)

Label

• Investigation of heating effects in near-field experiments with luminescent organic semiconductors (Articolo in rivista) (literal)

Anno

• 2004-01-01T00:00:00+01:00 (literal)

Alternative label

• G. Latini; A. Downes; O. Fenwick; A. Ambrosio; M. Allegrini; P.G. Gucciardi; S. Patanè; C. Daniele; C. Silva; R. Daikf; W.J. Feast; F. Cacialli (2004)
  Investigation of heating effects in near-field experiments with luminescent organic semiconductors
  in Synthetic metals
  (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori

• G. Latini; A. Downes; O. Fenwick; A. Ambrosio; M. Allegrini; P.G. Gucciardi; S. Patanè; C. Daniele; C. Silva; R. Daikf; W.J. Feast; F. Cacialli (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume

• 14 (literal)

Rivista

• Synthetic metals (Rivista)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni

• DepartmentofPhysicsandAstronomy,LondonCentreforNanotechnology,UniversityCollegeLondon; INFM and Dipartimento di Fisica, Università di Pisa; CNR, Istituto per i Processi Chimico-Fisici, sez. Messina; INFM and Dipartimento di Fisica MTFA, Università di Messina; CavendishLaboratory,UniversityofCambridge; PolymerScienceandTechnology,DurhamUniversity (literal)

Titolo

• Investigation of heating effects in near-field experiments with luminescent organic semiconductors (literal)

Abstract

• We present a study of heating effects in apertured near-field gold-coated probes which makes use of the temperature dependence of the photoluminescence spectra of the polymer semiconductor poly(p-phenylene vinylene) (PPV). The small throughput of metal-coated probes used for aperture-scanning near-field optical microscopy (aperture-SNOM) can induce significant probe heating, even when operated with laser powers of only a few mW. According to recent literature the probe apex can reach several hundred degrees celsius, possibly producing local heating of the specimen. Such a possibility needs to be investigated carefully, since it could affect the results of both near-field spectroscopy or lithography, especially where the photosensitive material happens to be sensitive to high temperatures, as for the PPV precursor. Interestingly, the sensitivity of conjugated polymers optical properties to changes in temperature (blue-shift of either photoluminescence or absorption upon heating), can be used as a convenient tool for investigation of the sample heating. Here, we report a comparison between photoluminescence spectra collected in the far-field but with excitation in either the far- or near-field, which demonstrate the absence of any significant difference, and thus indicate a negligible heating of the polymers during SNOM experiments. In addition, we demonstrate that near-field illumination of PPV precursor films with red light (i.e. with a wavelength longer than the absorption edge of PPV precursor), does not result in any lithographic effect, confirming that thermolithography of the PPV precursor is not significant in our lithography experiments. (literal)

Prodotto di

• Metodologie innovative per lo studio ed il controllo delle proprietà (opto)elettroniche di materiali e dispositivi multifunzionali (MD.P04.026.003) (Modulo)

Autore CNR

• ANTONIO AMBROSIO (Persona)
• PIETRO GIUSEPPE GUCCIARDI (Unità di personale interno)

Incoming links:

Autore CNR di

• PIETRO GIUSEPPE GUCCIARDI (Unità di personale interno)
• ANTONIO AMBROSIO (Persona)

Prodotto

• Metodologie innovative per lo studio ed il controllo delle proprietà (opto)elettroniche di materiali e dispositivi multifunzionali (MD.P04.026.003) (Modulo)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#rivistaDi

• Synthetic metals (Rivista)