An aptasensor for sensitive detection of human breast cancer cells by using porous GO/Au composites and porous PtFe alloy as effective sensing platform and signal amplification labels.

Highlights: [•] Aptamer biosensor for MCF-7 cells based on ultrasensitive electrochemical detection. [•] Porous GO/Au composites and porous PtFe alloy were used as effective sensing platform and signal amplification labels. [•] PEG not only as an excellent reductant, it can also make Au nanoparticles uniformly distributed in the GO/Au composites. [ABSTRACT FROM AUTHOR]