Graphene / MoS2 heterostructures for DNA detection

Researchers have fabricated a graphene/MoS₂ heterostructure for label-free selective detection of DNA hybridization. The graphene protected the MoS₂ from ambient moisture and oxygen and acted as a biocompatible host for the DNA molecules.  The photoluminescence intensity from the MoS₂ layer increased with increased concentration of target DNA. The differentiation of complementary and one-base mismatched DNA with the graphene/MoS₂ heterostructure could be performed at a concentration as low as 1 attomole.

Graphene/MoS2 Heterostructures for Ultrasensitive Detection of DNA Hybridisation; P.T.K. Loan et al, Advanced Materials; DOI: 10.1002/adma.201401084

http://onlinelibrary.wiley.com/doi/10.1002/adma.201401084/abstract