Day 1 :
AKHAN Semiconductor, USA
Adam Khan is Founder and CEO of AKHAN Semiconductor. He has authored several patents and technical publications, and is also a frequent speaker on Diamond Semiconductor and Clean Technology. As a result of his award-winning research, which he began as an Electrical Engineering student at age 19, he is co-inventor of the Miraj Diamond™ Platform. He has served as a Speaker and Expert Witness to a variety of Federal bodies, including the US House Space, Science and Technology Committee and the US Department of Energy. Most recently, his work was recognized and individually honored by the United States Congress in the 114 Congressional Records and Proceedings. He earned his BS in Electrical Engineering and Physics from the University of Illinois Chicago, before pursuing graduate research at Stanford University. He has been everything from a Forbes 30 under 30 honoree, to a CleanTech Open Midwest Innovation Summit winner
Diamond is a well-known material that commands many excellent characteristics including great hardness,high thermal conductivity, high-optical transparency, and excellent chemical stability. In this work, we study the practical and economical usage of Nanocyrstalline Diamond (NCD) as a fi rst surface in an anti-refl ective coating upon a traditional substrate. Using measured index of refraction and extinction coeffi cient values, multi-layer coating solutions for diff erent spectral regions such as the visible or infrared wavelengths were developed using OpenFilters optical design soft ware. Th e simulation results from OpenFilters soft ware indicate comparable transmissivity and refl ectivity performance to known solutions while providing enhanced mechanical properties such as improved breakage and scratch performance and resistance to impact from airborne particles. Pioneering work on low temperature, high quality diamond deposition methods by AKHAN Semiconductor Inc. has opened the doors for the use of diamond in a wide variety of optical applications. It is shown that Nanocrystalline Diamond (NCD) coatings with grain size of 10-100 nm can signifi cantly enhance the breakage, scratch performance and hydrophobicity of glass displays and lenses. With Complementary Metal Oxide Semiconductor (CMOS) device integration now possible utilizing nanocrystalline diamond on a wide variety of optical substrates, new opportunities are now possible for the next generation of optical sensing technologies.
Argonne National Laboratory, USA
Anirudha Sumant is a Materials Scientist working at Center for Nanoscale Materials, Argonne National leading the research on nanocarbon materials including CVD-diamond, carbon nanotube and graphene. He has more than 22 years of research experience in the synthesis, characterization and developing applications of carbon based materials. His main research interests include electronic, mechanical and tribological properties of carbon based materials, surface chemistry, micro/nano-scale tribology, and micro-nanofabrication. He is the author and co-author of more than 100 peer reviewed journal publications, two book chapters, winner of four R&D 100 awards, NASA Tech Brief Magazine Award, 2016 TechConnect National Innovation Award, has 20 patents granted, and 11 pending and given numerous invited talks. His research in diamond materials helped in the formation of several start-up companies including NCD Technologies Inc. and AKHAN Semiconductors Inc. He is a Member of MRS, STLE and AVS.
In our previous studies we have demonstrated that the new super lubricity mechanism at macroscale by combined uses of graphene mixed with nanodiamonds sliding against diamond-like carbon (DLC). In particular, we showed that super low friction regime (the coefficient of friction is 0.004) is observed when graphene patches wrap around the nano diamonds and form nanoscrolls with reduced contact area sliding against an incommensurate DLC surface. In the present study, we show that other two dimensional (2D) layered material such as molybdenum disulfi de (MoS) is also capable of demonstrating super lubricity through unique tribochemical reaction with carbon leading to formation of onion-like carbon (OLC) at the tribological interface. We have observed that beyond some initial run-in period, the friction comes down to some unmeasurable levels and maintains in that state for a very long period of time, despite the fact that introduced 2D film of MoS is only a few nanometer thick. Our detailed experimental and theoretical investigations suggest that formation of OLCs is possible through tribochemical reaction with these 2D materials that could occur at the tribological contact due to high contact pressure. Th ese OLCs behaves in a similar way described earlier in our previous studies, providing reduced contact area and incommensurability with respect to the sliding DLC surface leading to super lubricity. We will discuss the detailed mechanism and highlight the similarities and diff erences with the previously demonstrated super lubricity involving graphenenanodamond ensembles. Th is new discovery broadens the fundamental understanding of frictional behavior of 2D materials beyond graphene and opens a wide range of possibilities for implementing them in mechanical and tribological applications involving static, sliding, and rotating contacts.
Synthetic Element Six (SES), Taiwan
Keynote: Graphene on Diamond (GOD)
Time : 10:50 to 11:20
James C Sung was responsible for diamond production technology at GE Super Abrasives, for diamond tools development at Norton. He has set the diamond grid specifications for diamond disks used worldwide for CMP of IC wafers, and helped IPO of Kink Company in Taiwan. He co-founded graphene synthetic with Huang-He worldwide, the world's largest diamond maker located in Henan China. He is now Chairman of Applied Diamond Inc., selling the most advanced CMP diamond disks-V the manufacture of next generation interconnects.
Graphene is the stretched diamond (111) plane graphene can be formed martensitic alloy without breaking the carbon bonds, on diamond surface by specialty heat treatment in vacuum. In this case, Graphene on Diamond (GOD) heteroepitaxy is similar to homo-epitaxy so the signal transmission is continuous. GOD is an ideal computational device as graphene contains the most eff ective transmission lattice, capable of terahertz communication by Mach 100 speed of phonon (lattice vibration). On the other hand, diamond is considered to be the most stable quantum computing solid due to its highest Debye temperature. During the quantum computing, the Q-bits must be entangled without atomic vibration, and diamond’s super hard lattice is capable to maintain this stability for milliseconds, even at room temperature. Diamond contains about 1% C13 isotope atoms in the lattice. Th ese atoms may be ion planted and heat treated to cluster as Q-bits. Th e superposition of spins from the extra neutron in the nuclei would be the best mechanism for Quantum computing. With about 50 Q-bits entangled in milliseconds while these Q-bits are stationary, the vast Computational possibilities can tackle even more diffi cult problems that for all human transistors combined. With GOD, the quantum computing can be initiated with graphene on cubical face (100) of diamond; and the Collapsed quantum waves may exit from octahedral face (111). Thus, GOD would be the dream AI chip that Outperforms even the smartest combinations of all current computers interconnected together.