Electrical Conductivity of Thin Films of Rubidium on Glass Surfaces

Nature ◽  
1936 ◽  
Vol 137 (3464) ◽  
pp. 493-494 ◽  
Author(s):  
A. C. B. LOVELL
Keyword(s):  
Thin Films ◽  
Electrical Conductivity ◽  
Glass Surfaces ◽  
Conductivity Of Thin Films

scholarly journals The electrical conductivity of thin metallic films II— caesium and potassium on pyrex glass surfaces

1937 ◽  
Vol 158 (895) ◽  
pp. 718-728 ◽  
Keyword(s):  
Thin Films ◽  
Heat Treatment ◽  
Electrical Conductivity ◽  
Alkali Metals ◽  
Pyrex Glass ◽  
Metallic Films ◽  
Similar Investigation ◽  
The Stability ◽  
Glass Surfaces ◽  
Conductivity Of Thin Films

An account of an investigation of the electrical conductivity of thin films of rubidium deposited in high vacua on very clean glass surfaces has been previously published. It will be referred to in what follows as Part I. The method has now been used in a similar investigation using caesium and potassium. The vigorous heat treatment of the surface and vacuum technique described in Part I has again been found necessary in order to attain reproducible results, and the effects on contaminated surfaces are similar. It will be seen that the resistivities of the stable films are consistent with the theory given in Part I; moreover, the greater stability of the caesium films has supplied a test of the theory down to thicknesses of only a few A. The decay phenomena associated with the unstable films show a marked gradation through these three alkali metals, the stability of a given film increasing in the order potassium—rubidium—caesium.

scholarly journals The electrical conductivity of thin films of mercury

1939 ◽  
Vol 172 (951) ◽  
pp. 530-539 ◽  
Keyword(s):  
Thin Films ◽  
Heat Treatment ◽  
Electrical Conductivity ◽  
Alkali Metals ◽  
High Vacuum ◽  
Experimental Measurements ◽  
Preliminary Note ◽  
Extended Study ◽  
Temperature Coefficients ◽  
Conductivity Of Thin Films

In the present paper an account is given of experimental measurements on the electrical conductivity of thin films of mercury prepared by evaporative deposition in a high vacuum according to the technique described in previous papers (Lovell 1936; Appleyard and Lovell 1937). In a brief preliminary note (Appleyard 1937) we have pointed out that the results for mercury are very different from those for the alkali metals, and that in particular a considerable thickness of mercury must be deposited on the pyrex surface before conductivity begins. We have since confirmed and extended these observations, obtained accurate absolute values for the thickness of the films, investigated their stability, and made an extended study of their temperature coefficients after heat treatment. A comparison with the results of previous workers is given later.

Synthesis and Electrical Conductivity of N-(3-(Trifluoromethyl)Benzylidine)Thiosemicarbazide towards Dyes Sensitized Solar Cell

2018 ◽  
Vol 382 ◽  
pp. 364-368
Author(s):  
Uwaisulqarni M. Osman ◽  
Azieda Syafika N. Farizal ◽  
Nurhayati Ishak ◽  
Mohd Hasmizam Razali ◽  
M.I.N. Isa
Keyword(s):  
Thin Films ◽  
Electrical Conductivity ◽  
Light Intensity ◽  
Indium Tin Oxide ◽  
Spectroscopic Technique ◽  
Ito Glass ◽  
Maximum Conductivity ◽  
Ft Ir ◽  
Uv Visible ◽  
Conductivity Of Thin Films

Organic compound containing thiosemicarbazide moiety has been successfully synthesized. The new synthesized dyes, N-(3-(Trifluoromethylbenzaldehyde)benzylidine thiosemi- carbazide (3-TFT) was characterized by spectroscopic technique namely, CHNS elemental analysis, Fourier Transform Infra-Red analysis (FT-IR), UV-Visible analysis (UV-Vis),1H and13C Nuclear Magnetic Resonance (NMR). The thin films of this dye have been prepared using a spin coating technique and deposited on indium tin oxide (ITO) glass substrate. The main highlight was an electrical conductivity of thin films which was measured using four point probing system in a range of light intensity, 25 Wm-2until 200Wm-2. The potential electrical conductivity of 3-TFT dye was found gradually increased until reached the maximum conductivity values of 0.1489 Scm-1at light intensity of 100 Wm-2in the most diluted concentration at 1x10-5M.

Changes in the electrical conductivity of glass, quartz, Au, C, and MoS2 films under influence of continuous proton injection

2021 ◽  
Vol 10 ◽  
pp. 37-46
Author(s):  
G. S. Burkhanov ◽  
◽  
S. A. Lachenkov ◽  
M. A. Kononov ◽  
A. U. Bashlakov ◽  
...  
Keyword(s):  
Thin Films ◽  
Electrical Conductivity ◽  
Ion Beam ◽  
Test Sample ◽  
Ion Source ◽  
Gold Target ◽  
Glass Substrates ◽  
Wide Range ◽  
Continuous Stream ◽  
Conductivity Of Thin Films

Changes in the electrical conductivity of a wide range of materials with different crystal-chemical types and electrophysical properties (quartz, glass, molybdenum disulfide, graphite, gold) under continuous proton injection are studied. Film samples of layered MoS2 and graphite compounds were obtained on rough surfaces of glass or quartz by mechanical rubbing of powder. Gold films are formed on glass substrates by magnetron sputtering of a gold target. To create a continuous stream of protons injected into the test sample, a stationary ion source with a cold cathode and a magnetic field forming an ion beam of relatively low intensity was used. The current in the ion beam is up to 1.2 mA, the pressure of hydrogen in the chamber is ~10 – 2 Pa, the energy of hydrogen ions is from 1 to 4 keV. The experimental results indicate that under conditions of continuous proton injection, the electrical conductivity of thin films with a layered structure (MoS2 and graphite) increases sharply (by 4 – 5 orders of magnitude). This effect increases when the temperature decreases from ~ 293 to ~ 77 K, as well as when the number of charges supplied to the sample increases. In the case of continuous injection of protons into massive dielectrics (glass, quartz) and thin films of gold, no noticeable change in electrical conductivity was detected.

scholarly journals The electrical conductivity of thin metallic films I—Rubidium on pyrex glass surfaces

1936 ◽  
Vol 157 (891) ◽  
pp. 311-330 ◽  
Keyword(s):  
Thin Films ◽  
Heat Treatment ◽  
Electrical Conductivity ◽  
Film Thickness ◽  
High Vacuum ◽  
Mean Free Path ◽  
Metallic Films ◽  
Bulk Metal ◽  
Modern Technique ◽  
Glass Surfaces

This paper describes measurements of the resistivity of thin films of rubidium, deposited on cooled pyrex surfaces by a method which allows the use of the conditions of purity and high vacuum possible with modern technique. In this work, by vigorous heat treatment in high vacua, clean pyrex surfaces have been obtained on which stable and coherent films as thin as 40 A. have been produced. Conductivities have been obtained with a number of atoms on the surface corresponding to less than the number contained in a monatomic layer of rubidium; moreover, the approach of thicker films to the resistivity of the bulk metal is in agreement with that calculated from a simple theory which takes account of the fact that the film thickness is less than the normal electronic mean free path in the bulk metal.

Sign in / Sign up

Export Citation Format

Share Document