Rنtzke، نويسنده , , Klaus and Wiegemann، نويسنده , , Maja and Shaikh، نويسنده , , Muhammad Qasim and Harms، نويسنده , , Stephan and Adelung، نويسنده , , Rainer and Egger، نويسنده , , Werner and Sperr، نويسنده , , Peter، نويسنده ,
Barnacles attach to a wide variety of surfaces underwater and show substrate-specific adhesion mechanisms. Investigating and understanding these mechanisms is a key for developing new technical adhesives. We expected open volume (porosity) at the sub-nanometre scale to occur in barnacle adhesive. With positron annihilation lifetime spectroscopy (PALS) it is possible to detect porosity at the nanometre scale by determining the lifetime of positrons. This method has not been applied to bioadhesives so far. We showed that PALS is a suitable technique for the investigation of the barnacle base and its adhesive with respect to open volume. The results were interpreted using a standard model adapted from polymers. We thereby estimated pore sizes of 0.5 nm.
Positron annihilation lifetime spectroscopy , Barnacle cement , Adhesion mechanism , porosity , Bioadhesive