Electrochemical Growth of Organic Conducting Microcrystals of Tetrathiafulvalene BromideM. M.-T. thanks the Generalitat de Catalunya for a Nanotechnology fellowship. The authors also thank Prof. C. Rovira for useful discussions.

A new trend in electronics research is to increasingly employ chemical synthesis techniques in order to fabricate device components exhibiting physical properties addressed to specific applications. Examples of this approach are circuits made from carbon nanotubes and semiconducting nanowires. These nanostructures can be used, for instance, as chemical or biological sensors. In addition, chemical synthesis can be scaled up easily, which could give rise to cheaper devices. In this respect, it is interesting to consider nanowires or microwires of conducting organic salts as an appealing alternative route for the fabrication of nanoscale devices. In this paper, we describe the preparation of very good quality microcrystals of the metallic organic chargetransfer salt, tetrathiafulvalene bromide ((TTF)Brx). [3] The methodology employed here allows for the controlled synthesis of large quantities of microcrystals and could also be extendable to the fabrication of a multitude of charge-transfer salts with different physical properties. In the field of organic conductors, the development of new organic charge-transfer salts based on tetrathiafulvalene (TTF) derivatives has remained at the forefront of re-