Effect of temperature on conduction band energies of electrons in nonpolar liquids
The energy of injection of an electron from vacuum into various nonpolar liquids was studied as a function of temperature. The method used was based on the difference in the photoelectric work function of zinc under vacuum and in the liquid; the difference: phi/sub liq/ -- phi/sub vac/, is denoted V/sub 0/. Measurements are reported for n-pentane, n-hexane, 2,2-dimethylbutane, 2,2,4-trimethylpentane, 2,2,5-trimethylhexane, 2,2,4,4-tetramethylpentane, and tetramethylsilane (Me/sub 4/Si). In all cases V/sub 0/ increases with decreasing temperature. The increase is largest for n-hexane (0.0024 eV//sup 0/C), less for the branched hydrocarbons (approx.0.016 eV//sup 0/C), and smallest for Me/sub 4/Si (0.0005 eV//sup 0/C). The temperature dependence is roughly in accord with the Springett, Jortner, and Cohen model. The data on hydrocarbons show that V/sub 0/ increases as the free volume in the liquid decreases. (auth)
- Research Organization:
- Brookhaven National Lab., Upton, NY
- OSTI ID:
- 7296190
- Journal Information:
- J. Phys. Chem.; (United States), Journal Name: J. Phys. Chem.; (United States) Vol. 79:26; ISSN JPCHA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
360603 -- Materials-- Properties
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400301* -- Organic Chemistry-- Chemical & Physicochemical Properties-- (-1987)
ALKANES
ELECTRONIC STRUCTURE
ELECTRONS
ELEMENTARY PARTICLES
ELEMENTS
FERMIONS
HEXANE
HYDRIDES
HYDROCARBONS
HYDROGEN COMPOUNDS
LEPTONS
MATHEMATICAL MODELS
METALS
ORGANIC COMPOUNDS
PENTANE
PHYSICAL PROPERTIES
SILANES
SILICON COMPOUNDS
TEMPERATURE DEPENDENCE
ZINC