β Scribed by J.H. Larsen; ; D.E. Starr; Charles T. Campbell
No coin nor oath required. For personal study only.
The heats of adsorption of metal gas atoms onto single crystalline surfaces can be measured directly as a detailed function of coverage using a unique microcalorimeter. The development of this experimental apparatus and the results obtained from these experiments will be reviewed. The heat detection is performed with a highly sensitive pyroelectric polymer ribbon pressed into contact with the thin (1 Β΅m thick) single crystal sample, onto which pulses of a metal atom beam impinge. Heats of adsorption have been measured for pulses of gas containing a few per cent of a monolayer with a pulse-to-pulse standard deviation as low as 1.5 kJ β’ mol -1 . The adhesion energy of multilayer metal films can be estimated from the integral enthalpy of adsorption.
π SIMILAR VOLUMES
Throughout the ages, gold has been highly valued because of its seeming chemical inertness, its luster and beauty resulting from its resistance to bulk tarnishing reactions. However, the surface of gold is not completely inert, particularly in the presence of adsorbed oxygen. Indeed, there has been