WE investigated the magneto-conductance of gold nano-wires in a in mes
oscopic 2-probe configuration. The nano-structures were fabricated usi
ng a four-layer resist system and Electron beam lithography. The sampl
es consisted of a wire of length L=100-1000 nm and cross section 30 x
30 nm(2) connected to two funnel-shaped contacts, At very low temperat
ures T similar or equal to 100mmK the magneto-conductance of all measu
red devices showed a rms-value delta G approximate to 0.1e(2)/h. Our m
easurements demonstrate that the conductance fluctuations are strongly
influenced by the contacts. This is most significant in the correlati
on field B-c similar to 1/F psi which decreases with decreasing wire l
ength. We also observed a weak dependence of delta G on the wire lengt
h L which can be interpreted as a dimensional crossover from 1D (L gre
ater than or equal to 400 nm) to 2D (L less than or equal to 200 nm).