Patent ID: 8663451

Claim:
A linker for joining an electrode and a capture probe on a biochip, comprising a compound of formula (I): R 2 —(CH 2 ) m —(R 3 ) n —(CH 2 ) k —R 1 (I) wherein R 1 is a functional group for binding the capture probe which is protein, DNA, RNA, or enzyme, wherein the R 1 functional group is —C(═O)—OH, —C(═O)H, —NH2, or epoxide; R 2 is a functional group for connecting the electrode selected from the group consisting of Au, Pt, Ag, and ITO, wherein the R 2 functional group is —SH, —S—C(═O)CH 3 , sulfide, disulfide, or silane; R 3 is a thiophene or thiophene derivative; n is an integer of from 1 to 4; m is an integer of from 0 to 5; k is an integer of from 0 to 5.