The fabricationofthesilvermicrowireelectrodewassimilarto
that ofgoldwireelectrodes [20]. Acopperwirewaspassed
through a100 mL plasticpipettetipanddippedinaconductive
silver solution.Theendofthecopperwirewasthenattachedtoa
short lengthsilverwire(12.5or25 mm) bygentlytouchingitand
subsequently withdrawingitintothetip,with 1 mmprotrud-
ing. Thetipwasmeltedbyholdingitfor8sinthemouthofa
tubular ovensetto450 1C. Goodsealingbetweenplasticandthe
silver wireensureslong-termstability,whichisobviousfroma
lack ofwaterbuild-upintheelectrodetipandfromscanswithout
noise. Toobtainavibratingelectrode,avibratingdevicewas
placed inthebackofthetip [21] using anadaptedmethod [22].