Diffusion of Li into Ag

298 to 353 K. That author also claimed that the diffusion of Li 

Ignatiev that Li diffuses into graphite even at liquid nitrogen temperature to leave only a submonolayer of Li on the surface. Diffusion of other alkali metals (Na, K, and Rb) into silver has also been observed by Lambert and co-workers but is significant only at high temperatures ( 870 K). Li diffuses more readily because of its small size. The atomic radii for Li, Na, K, Rb and Cs are 1.55, 1.90, 2.35, 2.48 and 2.67 A respectively. 

It was also observed in this work that Li and/or Li oxides appeared red under Ar ion bombardment. In the energy range of 500 to 2000 eV, the brightness of the red color increased with the ion energy. This provided another means to detect the presence of Li (or Li oxide). In one experiment, a clean Ag substrate was covered by a multilayer Li film (95% by AES) and then exposed to THF at 110 K. After about two hours (one hour for sample warm-up and the other for XPS characterization of the surface), the sample was placed under the Ar ion beam for cleaning. It took about 2 minutes to eliminate the Li layer (or Li oxide layer) on the surface by Ar ion bombardment 

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The ions Li+, Na+, K+ and Ag+ diffuse readily into the zeolite structure of sodalite while Ti", Rb" and Cs diffuse with great difficulty. This result is consistent with the 0.26-run diameter accessibility of the channels in sodalite [134]. The Ca +/Na-A zeolite exchange is often compared with 

Although Ag was inert to THF and Li, the diffusion of Li into Ag was significant. Therefore a better substrate is required for future study. There are two possibilities. One is to saturate the Ag by Li. The other is to use a bulk Li sample. But the problem with the latter is that TPD can not be used above 450 K, the melting point of Li. 

The reaction of THF (tetrahydrofuran) with Li was studied. THF adsorbed on deposited Li films with partial dissociation, yielding less than a monolayer mixture of THF and dissociated products on the surface. It was observed that Li diffused into Ag above room temperature. The electron beam in AES and x-rays in XPS caused severe damage to THF. 

Recently S. D. Parker has studied Li adsorption on Ag(lll) using AES, LEED and work function measurements. The Auger data indicated that initial deposition led to the formation of a monolayer of Li. During the growth of this monolayer some diffusion of Li into the substrate occurred and this became more and more pronounced towards the completion of the layer. The AES 

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