PAH features in the ISOSWS01 spectra of [WR] planetary nebulae

We present Infrared Space Observatory (ISO) Short Wavelength Spectrometer (SWS) observations for 16 Wolf-Rayet ([WR]) planetary nebulae (PNe) in the range from 2.4 to 16.5 mum with the aim of analyzing the dust features present in this group of objects. We have found that Policyclic Aromatic Hydrocarbon (PAH) molecular bands are present in most of the observed [WR] planetary nebulae with clear exception for K 2-16 among late type [WC] stars.