By "robots" they mean algae cells coated with a drug.
* because those words appear in the abstract
No, because they don't have consciousness. So, they are less of a slave than, say, our cat.
It is, in this case, like tying cleaning rags on the paws of a household cat, and saying "There, I have a robot".
This very odd "employment" (well) of the term 'robot' just had me check for the meaning a bit more deeply:
it appears that "robota" is related to work after the subject was forced to work, with limited choice, by a "predicament", a "change of condition", namely chiefly by being orphaned (cpr. related latin 'orbus').
That seems to be the field in which the word should move.
(It also seems that some people in wiktionary.org are doing a very good job.)