This study shows that dendritic molecules (i. e. semiconducting dendrimer poly(amidoamine) modified by adding substituted naphthalenediimides as end groups (PAMAMC) and dendritic porphyrins (D-Porphyrin)) can be used to switch the conductance of single-walled carbon nanotubes (SWNTs). In particular, under illumination hole injection into SWNTs prevails over the photoinjection of electrons from molecules to SWNT holes, and the film photoconductivity is observed. Moreover, it was demonstrated how D-Porphyrin associated with the surface of carbon nanotubes affects the forward and reverse photo-processes opening the possibility to realize a variety of devices that detect and respond to specific wavelengths of light.
PHOTOCONDUCTIVITY CHANGES IN POLYMER NANOCOMPOSITES CONTAINING SINGLE-WALLED CARBON NANOTUBES COUPLED TO LIGHT HARVESTING MOLECULES
VALENTINI, LUCA;ARMENTANO, ILARIA;KENNY, Jose Maria;
2006
Abstract
This study shows that dendritic molecules (i. e. semiconducting dendrimer poly(amidoamine) modified by adding substituted naphthalenediimides as end groups (PAMAMC) and dendritic porphyrins (D-Porphyrin)) can be used to switch the conductance of single-walled carbon nanotubes (SWNTs). In particular, under illumination hole injection into SWNTs prevails over the photoinjection of electrons from molecules to SWNT holes, and the film photoconductivity is observed. Moreover, it was demonstrated how D-Porphyrin associated with the surface of carbon nanotubes affects the forward and reverse photo-processes opening the possibility to realize a variety of devices that detect and respond to specific wavelengths of light.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
