Conducting-polymer towers have been fabricated by a template-less meth
od from homogeneous monomer solution using the scanning electrochemica
l microscope (SECM). The features of the topogaphy feedback mode of th
e SECM-in which the microelectrode is vibrated laterally (thin arrows
in the Figure)-are described and the characterization of polypyrrole t
owers (illustrated on the front cover) detailed. Uses in biosensors ar
e foreseen.