In this work, the microfluidic-assisted synthesis of copper-tetracyanoquinodimethane (Cu-TCNQ) nanostructures in ambient environment is reported for the first time. A two-layer microfluidic device comprising parallel actuated microchambers was used for the synthesis and enabled an excellent fluid handling for the continuous and multiple chemical reactions in confined ultra-small chambers. Different precautions were applied to ensure the reduction state of copper for the synthesis of Cu-TCNQ charge-transfer compounds. The localized synthesis of copper and in situ transformation to Cu-TCNQ complexes in solution were achieved by applying different gas pressures in the control layer. Additionally, various diameter of Cu-TCNQ nano-/micro-structures were obtained by adjusting the concentration of precursors and reaction time. After the synthesis, platinum (Pt) microelectrodes arrays which were aligned at the microchambers, could enable the in situ measurements of the electronic properties of the synthesized nanostructures without further manipulation. The as-prepared Cu-TCNQ wire bundles showed good conductivity and reversible hysteretic switching effect, which proved the possibility in using them to build advanced nanoelectronics.
Yanlong Xing, Guoguang Sun, Eugen Speiser, Norbert Esser, and Petra S. Dittrich
ACS Appl. Mater. Interfaces, Just Accepted Manuscript
Publication Date (Web): April 26, 2017
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