Many books covering nanoscience and nanotechnology topics are found in the call number area TA418.9, so you could browse the shelves at that location.
Safari Tech Books Online
Computer programming manuals from O'Reilly online.
CRCnetBASE
A keyword searchable collection of engineering handbooks and textbooks from CRC Press, a major science and engineering publisher. The collection is also browsable, and includes a category on nanoscience/nanotechnology.
Knovel
A collection of full-text engineering and scientific handbooks and databases, with built-in software tools.