Yesterday I was so excited about that I had a chance to meet with Dr. Lain-Jong Li.
He is an outstanding researcher in the field of graphene and carbon nanotube materials. His group published a total of 18 journal papers in 2009. And many of them are published in Advanced Materials, Small….and etc.. He was invited to give a talk about his research yesterday, during the presentation, he mentioned that the contact between carbon nanotube and metal electrode plays a more important role than the central region of the carbon nanotube network FET in biosensing application. He attributed this effect to Schottky barrier between metal and semiconducting nanotubes, so I asked him whether the same effect will happen in graphene devices. He told me graphene is metallic, and there should not be any barrier in the contact. That triggers me to think of a properties of graphene called of Klein tunneling. The tunneling probability of transport carriers is always 1 despite the mismatch in work function of these two part of graphene....
They also stress on chemical modification of graphene and CNT, just like the way we do. However, I have been spent one year studying this project, and it turns out that I didn't get very positive results. In the past year, I've read a lot of papers about graphene, but the experimental data still fluctuates for many unknown reasons. An increasing number of factors in our experiments need to be controlled--such like humidity control in KPM measurement and modification process control.... I don't know why I've encountered so many problems. Maybe this is the only route to the final success. I have so many questions need to be answered. So, when Dr. Li Lain-Jong came to our lab, I asked him lots of questions about the obstacles I met. After about an hour's discussion with him, I received quite a few valuable advice about our research project. I am so glad that I have such chance to discuss with him, which strongly inspired me in the field of materials research.
He is an outstanding researcher in the field of graphene and carbon nanotube materials. His group published a total of 18 journal papers in 2009. And many of them are published in Advanced Materials, Small….and etc.. He was invited to give a talk about his research yesterday, during the presentation, he mentioned that the contact between carbon nanotube and metal electrode plays a more important role than the central region of the carbon nanotube network FET in biosensing application. He attributed this effect to Schottky barrier between metal and semiconducting nanotubes, so I asked him whether the same effect will happen in graphene devices. He told me graphene is metallic, and there should not be any barrier in the contact. That triggers me to think of a properties of graphene called of Klein tunneling. The tunneling probability of transport carriers is always 1 despite the mismatch in work function of these two part of graphene....
They also stress on chemical modification of graphene and CNT, just like the way we do. However, I have been spent one year studying this project, and it turns out that I didn't get very positive results. In the past year, I've read a lot of papers about graphene, but the experimental data still fluctuates for many unknown reasons. An increasing number of factors in our experiments need to be controlled--such like humidity control in KPM measurement and modification process control.... I don't know why I've encountered so many problems. Maybe this is the only route to the final success. I have so many questions need to be answered. So, when Dr. Li Lain-Jong came to our lab, I asked him lots of questions about the obstacles I met. After about an hour's discussion with him, I received quite a few valuable advice about our research project. I am so glad that I have such chance to discuss with him, which strongly inspired me in the field of materials research.
