Tuesday, 20 May 2014
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