  We present a tight-binding model study of a two-terminal graphene nanopore
device for sequential determination of DNA bases. Using Green's function
technique we investigate the changes in electronic transport properties of the
device due to insertion of different nucleotides into the nanopore created
within a zigzag graphene nanoribbon. First we try to characterise the device in
static condition and then go for sequencing application by setting the bias
across it to a specific voltage and then recording the characteristic current
signals corresponding to each nucleotides of a translocating DNA. Our
investigations show that graphene nanopores can certainly become very efficient
and reliable for sequencing applications in future.
