Showing papers by "S. Roth published in 1989"

TL;DR: In this paper, the influence of the lengths of the conjugated chains on the conductivity of polyacetylene polymers is investigated. But this question is of twofold interest.

TL;DR: In this article, the authors summarize the results of a discussion meeting at ICSM'88 on transient photoconductivity in trans-polyacetylene and discuss the mechanism of excitation, transport and recombination of charged carriers.

TL;DR: In this paper, a model of a cellular automation based on a linear arrangement of donor-acceptor-modified polyenes separated by inert spacers is presented and some calculations on the efficiency of molecular switching in such an automation are presented.

TL;DR: In this article, time resolved photoconductivity measurements are reported for pulsed excitation of highly oriented poly(p-phenylene-vinylene) [PPV] films.

TL;DR: In this paper, the de Haas-van Alphen effect was used to determine the absolute value of the magnetization of sealed, chemically active graphite samples, which indicated that the number of carriers in the graphite layers and the chemical potential are both field dependent.

TL;DR: In this article, the authors performed magnetic resonance experiments on a series of segmented polyacetylenes with different defect concentrations and concluded that defects present in their samples are mainly sp3-hybridized carbon-atoms.