Molecular electronics. It's all about contacts.
D055598:Chemical Phenomena; D002627:Chemistry, Physical; D004247:DNA / Q000737:chemistry*; D004553:Electric Conductivity; D004563:Electrochemistry; D004566:Electrodes; D006046:Gold; D016252:Microscopy, Scanning Tunneling; D015203:Reproducibility of Results; D013438:Sulfhydryl Compounds / Q000737:chemistry*