I agree with other ways to get him to stop time for the first time.
and as with black hole we can throw a bunhc of ideas out there gravity is a great start, but Black holes also give off radiation as well as "Quantum analysis of black holes shows them to possess a temperature and Hawking radiation." wikipedia ftw so we can have him generate massive amounts of negative and positive tempratures and hawking radiation is force in its self giving him powers that the earth cant even really comprehend.
also heads up i have a really cool rough sketch of how i want nano to look something me and tyler can work on and get get really good.