부산대학교 도서관

Difficulty in forming non-invasive and compliant electrical contact over extremely thin organic films makes it challenging to achieve molecular-scale electronic devices that function in high yields under various conditions. This thesis shows that directly addressable electrically reliable top-contact over delicate organic surface could be achieved in a remarkably simple and straightforward way. Conical microelectrode of liquid metal (eutectic Ga-In; EGaIn) is embedded in photo-curable polymeric scaffold—optical adhesive (OA) for circumventing problems resulting from syringe-tethered form of liquid metal electrode. An OA-embedded Ga2O3/EGaIn (OA-Ga2O3/EGaIn) top contact allows one to measure rates of charge tunneling in high yields and with good reproducibility. Untethered OA-Ga2O3/EGaIn top-contact makes it possible to utilize liquid metal-based molecular junctions for carrying out low-temperature experiments and constructing flexible devices. The method described here does not need complex lithographic processes at the nanometer scale, and thus opens the ability to develop a high throughput method for making molecular-scale electronic devices through directly addressable—that is, printable—soft top contacts.