CVD

1. Conference Summary Talks on the Science and Applications of Carbon Nanotubes for 10 yearsMildred S. Dresselhaus, Massachusetts Institute of Technology, DMR 0704197 2009 marked the 10th anniversary of P.I. Mildred Dresselhaus giving the conference summary talk at the NTXX Carbon Nanotube conference series which started in 1999 in Lansing, MI with about 100 people in attendance and culminated in NT09 in Beijing, China with about 1000 people for the International Conference on the Science and Applications of Carbon Nanotubes. This week-long conference has been a centerpiece of the carbon nanotube field, including invited talks, contributing talks and posters by the many conference participants on every aspect of carbon nanotube science and applications. Every year the P.I Mildred Dresselhaus has given the conference summary, highlighting the advances that have been made during the past year, identifying open issues that need to be addressed and indicating research opportunities for the research community to work on. This year commemorates 10 years that she has given this service to the carbon nanotube research community to promote the advancement of this important field of nanoscience and nanotechnology.

2. Growth and Characterization of Single and Double Layer GrapheneMildred S. Dresselhaus, Massachusetts Institute of Technology, DMR 0704197 Raman spectroscopy has been shown to provide a powerful technique for the characterization of many types of nanostructured carbon materials. Recently the Jing Kong group at MIT has developed a technique to grow a surface film of monolayer and bilayer graphene of centimeter size covering an entire substrate by a CVD process. The Dresselhaus group has worked with the Kong group to apply Raman spectroscopy to show similarities and differences in the structure and properties of CVD and HOPG derived monolayer and bilayer graphene in order to characterize the CVD materials now being prepared and to guide the development of improved CVD growth procedures to achieve better control of the structure and properties of CVD grown graphene. The presently prepared bilayers are a centimeter large and have rotation angles between 15˚ and 23˚ with an estimated crystalline coherence distance on the order of microns. Our goal is to eventually synthesize bilayer graphene by CVD with Bernal stacking (30˚ rotation angle). Present Raman spectra for CVD graphene show a broader spectral linewidth compared to HOPG-derived graphene and do not show a clear 4 peak G’ band Raman structure that is found in HOPG derived bilayer graphene. Graphene bilayers CVD HOPG