Chemistry Department Seminar

1. Proposing a dual energy barrier tunneling model to explain the imageability of the gold nanoparticles by STM. This model can also be used to construct multiple energy barrier structure on solid/liquid interface and to evaluate the electron transport ability of some monolayers of so-called “molecular wires” with electrochemical method. Thus we create the gold/molecular wire/gold sandwich like structures on gold electrode surface through molecular self-assembly and nanogold fabrication techniques.

2. Utilizing ITO-supported gold nanoparticle arrays as nanoelectrode arrays. Some conventional molecular self-assembly systems, such as monolayers of iodine, porphyrin monolayers and heteropoly acid, phospholipid/alkanethiol bilayers, 3-mercaptopropionicacid-bridged copper hexacyanoferrate multilayers, etc. can safely be transferred onto ITO-supported gold nanoparticle surfaces.

3. Gold nanoparticles can tune reactivities of electroactive species in solution and surface-bound proteins, which indicates that gold nanoparticles help heterogeneous electron tranfer.

4. ITO-bound gold nanoparticles can catalyze electroless deposition of gold to generate SPR-active electrode interface, which is used to investigate Ag UPD in-situ. 5. Utilizing gold nanoparticles as structural and functional units to deposit HRP on gold electrode surface, the resulted HRP/gold-nanoparticle electrode is a novel H2O2 biosensor with high stability.

Acknowledgement: This work was supported by the National Natural Sciences Foundation of China