Despite the start-up's name, Ann Arbor's NanoBio isn't so small anymore with $12 million in new financing.

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NanoBio is attracting some big investment these days. The Ann Arbor-based firm just secured $12 million in new financing to help develop the company, bringing the total amount invested to $80 million.

The 3-year-old firm, University of Michigan spin-off, employs about 20 people and a handful of interns. It has hired several ex-Pfizer people after the pharmaceutical giant closed the doors to its Ann Arbor campus in 2007.

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