A bola-amphiphile surfactant, containing a carboxylic acid at one end of th
e molecule and a thiol at the other, was bonded to nanoparticles of amorpho
us iron.:The bonding of both functional groups was verified by FTIR and;XPS
measurements. TPD measurements exhibited three temperatures at which molec
ules are removed from-the surface of the iron nanoparticles. The highest te
mperature, ca. 360 degrees C, is assigned as the temperature at which molec
ules bonded simultaneously at both ends are desorbed from the surface.