The mobility of lipid bilayers supported on single‐walled carbon nanotube (SWCNT) networks on mica has been investigated by fluorescence recovery after photobleaching (FRAP). The carbon nanotubes have been dispersed by two different bile salt derivatives (sodium taurodeoxycholate (TDOC) and sodium cholate (SC)) as well as by single‐stranded deoxyribonucleic acid (ssDNA) oligonucleotides. Whereas the diffusion coefficient of the supported lipid bilayer (SLB) is not influenced by TDOC‐dispersed SWCNTs, for SC‐ and ssDNA‐dispersed SWCNTs, it is reduced and becomes SWCNT concentration dependent. Scanning force microscopy (SFM) measurements reveal that the lipid bilayer is not affected, when spanning over TDOC‐dispersed SWCNTs, whereas SC‐ and ssDNA‐dispersed SWCNTs are only bridged by a lipid monolayer acting as diffusion barrier. The effect is more pronounced for ssDNA‐dispersed SWCNTs.
Schematic viewgraph of lipid bilayer supported on a SWCNT network on mica.