A Dmin arpeggio would fit perfectly, yes.
But again, incorperating sweep picking into your solos is just a matter of creativity. Just look at some COB solos and see how Alexi does it. See how Jason Becker does it. See how any other player that uses sweeps alot does it. People like Muhammed Suicmez, Rusty Cooley, Yngwie Malmsteen, the guy from Wintersun, Michael Romeo, Jeff Loomis etc etc.
You could also play around with the other diatonic arpeggios in that scale. They'd just be the same notes as the 7 diatonic traids in a key.