A scanning probe and quartz crystal microbalance study of the impact of C60 on friction at solid–liquid interfaces
نویسندگان
چکیده
We have investigated the changes in interfacial friction of toluene on mica and Ag(111) both in the presence and in the absence of interfacial C60 layers employing atomic force microscope (AFM) and quartz crystal microbalance (QCM) techniques. The lateral force measurements fail to detect C60 at the toluene/mica interface, presumably because the C60 is dislodged by the slowmoving probe tip. In contrast, QCM measurements of interfacial friction and slippage for toluene/Ag(111) are sensitive to the presence of interfacial C60. We see the friction double when C60 is present. The results are discussed in the light of the full-slip boundary condition which had been previously reported for surface forces apparatus (SFA) measurements on toluene/mica in the presence and absence of interfacial C60.
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