Before revision: There is some area of overlap between Biotechnology and Wet nanotechnology because living things are inherently bottom-up engineered and any exploitation of this by biotechnologists means they dabble in bottom-up engineering (though mostly at the level of producing macromoleucles like pretiones and nucliec acids from there monomer units.
After revision: There is some overlap of Biotechnology and Wet nanotechnology because living things are inherently bottom-up engineered and any exploitation of this by biotechnologists means they dabble in bottom-up engineering (though mostly at the level of producing macromolecules like proteins and nucleic acids from there monomer units.