Abnormal temperature dependence of photoemission intensity mediated by thermally driven reorientation of a monomolecular film.
The photoemission intensities of organic molecular layers generally obey the Debye-Waller temperature dependence but not always. With the example of a monomolecular film formed from [1,1';4',1''-terphenyl]-4,4''-dimethanethiol, we show that pronounced deviations from Debye-Waller temperature behavior are possible and are likely caused by temperature-dependent changes in molecular orientation.
Feng
D-Q
DQ
Department of Physics and Astronomy, University of Nebraska-Lincoln, Lincoln, Nebraska 68588-0111, USA.
Wisbey
D
D
Tai
Y
Y
Losovyj
Ya B
YB
Zharnikov
M
M
Dowben
P A
PA
D008567:Membranes, Artificial; D015394:Molecular Structure; D017785:Photons; D012680:Sensitivity and Specificity; D013057:Spectrum Analysis; D013237:Stereoisomerism; D013438:Sulfhydryl Compounds / Q000737:chemistry*; D013499:Surface Properties; D013696:Temperature; D013730:Terphenyl Compounds / Q000737:chemistry*; D014466:Ultraviolet Rays; D014965:X-Rays
C510727:(1,1'-4',1''-terphenyl)-4,4''-dimethanethiol; D008567:Membranes, Artificial; D013438:Sulfhydryl Compounds; D013730:Terphenyl Compounds