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The anomalous stiffness of biphenydimethyldithiol
Authors
Peter A. Dowben
D.Q. Feng
R. Rajesh
Jody G. Redepenning
Publication date
2 May 2005
Publisher
DigitalCommons@University of Nebraska - Lincoln
Abstract
Although organic adsorbates and thin films are generally regarded as soft materials, the effective Debye temperature, indicative of the dynamic motion of lattice normal to the surface, can be very high. For biphenyldimethyldithiol, the effective Debye temperature, determined from core level photoemission from the all carbon arene rings, is comparable to that of graphite. We associate this rigidity to the stiffness of the benzene rings, and the ordering in the molecular thin film. Measurements on the sulfur of poly(hexylthiophene) show that sulfur in an arene ring is less dominated by soft modes than the pendant sulfur of biphenyldimethyldithiol on the time scale of photoemission. ©2005 American Institute of Physic
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DigitalCommons@University of Nebraska
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Last time updated on 18/10/2013
UNL | Libraries
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Last time updated on 09/03/2019