The bonding kinetics of 11 Angstrom films of the perfluoropolyether Zdol-TX, supported on amorphous hydrogenated (CHx) and nitrogenated (CNx) carbon surfaces, is investigated. The bonding rate for Zdol-TX is found to be significantly greater than for Zdol on identical carbon surfaces. The observed bonding kinetics is interpreted by a time-dependent rate coefficient, k(t) = k(0)t(-h). A crossover in the bonding time dependence from t(-0.50) to t(-1.00) is observed for Zdol-TX on CHx between 60 and 90 degreesC. The change in the time dependence is attributed to bonding occurring from either a solidlike (t(-0.50)) or a confined liquidlike (t(-1.00)) state. The crossover temperature for Zdol-TX is significantly lower than for Zdol 4000 on CHx but is similar to lower molecular weight Zdols on CHx, thereby establishing a molecular weight effect. Conversely, the bonding of the perfluoroether lubricants on CNx is limited to solidlike (t(-0.50)) kinetics. The origins for the molecular weight and surface effects are discussed.