Design of a Temperature Programmed Desorption System for the Measurement of the Desorption Kinetics of Molecules from Surfaces
Clark, Nicholas J.
Temperature programmed desorption (TPD) is an experimental technique used to measure the desorption kinetics of molecules from surfaces. This technique is performed by linearly increasing the temperature of a sample while measuring the partial pressures of the desorbing gas species. It is used to determine the relative coverage and activation energies of the desorbing species. To perform these measurements, a computer controlled feedback control system was designed that generates linear temperature ramps. In addition, a program was written to simultaneously measure up to eight partial pressures during the temperature ramp for the TPD measurements. This TPD system was used to examine the thermal stability of graphene oxide films and to determine the reduction kinetics of graphene oxide.
TPD, Desorption, Graphene, TDS, Kinetics, Lab view, Temperature programmed desorption
Clark, N. J. (2009). <i>Design of a temperature programmed desorption system for the measurement of the desorption kinetics of molecules from surfaces</i> (Unpublished thesis). Texas State University-San Marcos, San Marcos, Texas.