Preferential synthesis of highly conducting Tl(TCNQ) phase II nanorod networks via electrochemically driven TCNQ/Tl(TCNQ) solid-solid phase transformation

Nafady, A, Sabri, Y, Kandjani, A, Alsalme, A, Bond, A and Bhargava, S 2016, 'Preferential synthesis of highly conducting Tl(TCNQ) phase II nanorod networks via electrochemically driven TCNQ/Tl(TCNQ) solid-solid phase transformation', Journal of Solid State Electrochemistry, vol. 20, no. 12, pp. 3303-3314.


Document type: Journal Article
Collection: Journal Articles

Title Preferential synthesis of highly conducting Tl(TCNQ) phase II nanorod networks via electrochemically driven TCNQ/Tl(TCNQ) solid-solid phase transformation
Author(s) Nafady, A
Sabri, Y
Kandjani, A
Alsalme, A
Bond, A
Bhargava, S
Year 2016
Journal name Journal of Solid State Electrochemistry
Volume number 20
Issue number 12
Start page 3303
End page 3314
Total pages 11
Publisher Springer
Abstract Facile synthesis and characterization of the highly conducting, thermodynamically favored, Tl(TCNQ) phase II microrods/nanorods onto conducting (glassy carbon (GC)) and semiconducting (indium tin oxide (ITO)) surfaces have been accomplished via redox-based transformation of 7,7,8,8-tetracynoquinodimethane (TCNQ) microcrystals. This electrochemically irreversible process involves the one-electron reduction of surface-confined solid TCNQ into TCNQ·- with concomitant incorporation of the Tl+(aq) cation, from the bulk solution, at the triple-phase boundary, GC or ITO│(TCNQ(s)/TCNQ·-(s))│Tl+(aq), through a nucleation/growth mechanism. Consistent with the conceptually related M(TCNQ) systems (M+ = Li+, Na+, K+, Ag+, and Cu+), the TCNQ/Tl(TCNQ) interconversion is strongly dependent upon scan rate, Tl+(aq) electrolyte concentration, and the method of attaching solid TCNQ onto the electrode surface. Spectroscopic (infrared (IR) and Raman), microscopic (scanning electron microscopy (SEM)), and surface science (X-ray photoelectron spectroscopy (XPS), energy-dispersive X-ray (EDX), and X-ray diffraction (XRD)) characterization of the electrochemically synthesized material revealed formation of pure Tl(TCNQ) phase II. Importantly, the generic solid-state electrochemical approach used in this study not only offers facile protocol for controllable and preferential synthesis of Tl(TCNQ) phase II but also provides access to fabricate and tune the morphology to yield microrod/nanorod networks. [Figure not available: see fulltext.]
Subject Electrochemistry
Keyword(s) Nanostructured materials
Redox-based transformation
TCNQ
Tl(TCNQ)
DOI - identifier 10.1007/s10008-016-3359-4
Copyright notice © 2016 Springer-Verlag Berlin Heidelberg
ISSN 1432-8488
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