How to get it: Edit
It is unlocked after researching the "Base Upgrade". This research is unlocked once you have succesfully taken over an alien base (not just blowing it up). Once the Base Upgrade has finished researching the workshop and laboratory will automatically upgrade into the Nano Tech Workshop and the Quantum Laboratory.
What it does: Edit
The Nano Tech Workshop functions exactly the same as a regular workshop except it works 50% faster.