Nanotechnology and cancer risk

My neighbor is a pharmacist, and likes to research various topics of medical science and latest findings. When it comes to cosmetics, she told me that nanotechnology works because the superfine particles can easily get into the skin and remove dark spots, among other things. On the other hand, there may be risk in cancer for the same reason that the particles are too small to be fought against by the body. I searched on Google for "nanotechnology cancer" (without quotes). 99% of the links are about how the technology is used as a tool to diagnose or treat cancer. But one article is an exception:

http://articles.latimes.com/2008/may/21/science/sci-nano21
Nanotechnology cancer risk found

It was written in May 2008 for ordinary readers with no pointers to professional publications.

A reader in a newsgroup posting asked: "Should this be verified, will we take a lesson from asbestos and start regulating/limiting production and use of these types of tubes?" There's no response.

I'll keep an eye on this topic. There must be scientific research on it. I just didn't find it online.