Journal article

Characterisation of two distinctly different processes associated with the electrocrystallization of microcrystals of phase I CuTCNQ (TCNQ=7,7,8,8-tetracyanoquinodimethane)

Alexander R Harris, Aaron K Neufeld, Anthony P O'Mullane, Alan M Bond

JOURNAL OF MATERIALS CHEMISTRY | ROYAL SOC CHEMISTRY | Published : 2006

Abstract

Semi-conducting phase I CuTCNQ (TCNQ = 7,7,8,8-tetracyanoquinodimethane), which is of considerable interest as a switching device for memory storage materials, can be electrocrystallized from CH3CN via two distinctly different pathways when TCNQ is reduced to TCNQ- in the presence of [Cu(MeCN)4]+. The first pathway, identified in earlier studies, occurs at potentials where TCNQ is reduced to TCNQ- and involves a nucleation-growth mechanism at preferred sites on the electrode to produce arrays of well separated large branched needle-shaped phase I CuTCNQ crystals. The second pathway, now identified at more negative potentials, generates much smaller needle-shaped phase I CuTCNQ crystals. Thes..

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