the Microstructure and Electrical Resistivity of Cluster-Based thin Films

1993 ◽  
Vol 317 ◽  
Author(s):  
Jeffery D. Bielefeld ◽  
Ronald P. Andres

ABSTRACTCluster-assembled thin metal films exhibit properties which are different from those of films obtained by conventional atomic-deposition. We present TEM data on the evolution of 2-D Microstructure and SFM data on the evolution of 3-D Microstructure in thin films grown by vacuum deposition of preformed silver clusters and of preformed acetylene-silver clusters on flat SiO2, and Mica. Electrical resistivity measurements of cluster-based Ag and Ag/C2H2 films deposited on glass substrates with nominal film thicknesses of 5 nm - 50 nm are also presented and discussed.

1967 ◽  
Vol 38 (4) ◽  
pp. 1986-1987 ◽  
Author(s):  
D. I. Kennedy ◽  
R. E. Hayes ◽  
R. W. Alsford

A number of thin aggregated metal films on glass substrates are analysed in terms of the model proposed earlier (Hill 1969). It is shown that the model is consistent, and that the conductivity of a thin metal film forming an island structure can be defined in terms of the island size and spacing, and of the properties of the substrate and the film material. The potential barrier heights for electron tunnelling between particles of gold, particles of platinum , and particles of silver through soda and barium aluminosilicate glass have been determined. It is shown that the bias effect in thin metal films (Hill 1964 a ) can only be observed with metals of work function close to that of the substrate material and when the substrate contains free alkali ions.


Author(s):  
H. P. Singh ◽  
L. E. Murr

This paper reports observations of nucleation and growth characteristics of thin metal films vapor deposited onto heated sodium chloride substrates. An attempt is made to explain the differences in nucleation and growth characteristics on the basis of classical nucleation theory.Thin metal films were prepared by vapor deposition onto heated NaCl (001) substrates in a commercial vacuum unit using a constant evaporation rate of approximately 1000 Å/sec. In the case of discontinuous thin films, approximately 200 Å of carbon was deposited for support. Samples for electron microscopy were prepared by standard techniques and were observed at 125 kV. Figs. 1(a) to (c) show a growth sequence of gold thin films characterized by 1) the formation of random, three dimensional, isolated nuclei at initial deposition, and their growth with further deposition predominantly by surface diffusion; 2) coalescence of these nuclei forming bigger islands; 3) the flattening of islands and formation of network structure : and 4) the filling up of these network structures with further deposition forming a continuous film.


1904 ◽  
Vol 72 (477-486) ◽  
pp. 226-235 ◽  

In the Bakerian Lecture of 1857,* on “ Experimental Relations of Gold and other Metals to Light,” Faraday described a series of experiments which were designed to throw light on the structure and behaviour of metals in their most attenuated forms. Probably the most remarkable of these experiments were those in which leaves and films of gold and silver supported on glass were changed by a temperature much below the melting point of the metal from a moderate translucence to clear transparence and from high metallic reflecting power to comparative deadness. These remarkable experiments seem practically to have dropped out of sight during the past 45 years for, so far, I have found no reference to this particular phenomenon in the papers of more recent workers on the reflecting and absorbing powers of thin metal films, and many physicists to whom I have shown these Faraday films have received them as a novelty.


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