http://144.206.159.178/ft/145/605877/14779411.pdf
Air Force Institute of Technology Air University Air Education and Training Command In Partial Fulfillment of the Requirements for the Degree of Doctor of Philosophy Benjamin L. Crossley, B.S.E.E., M.S.E.E. Major, USAF June 2011 I found this interesting on page 108 Optimized CNT field emission array basic schematic. First and foremost, these simulations have shown that the electrostatic screening between CNTs within an array element is the dominating factor of the electric field magnitude. Any adjustments to the CNT synthesis process that can increase the carbon nanotube spacing will increase the electrostatic field penetration between CNTs and increase the local electric field magnitude. The screening effect is so dominant within the array elements that the pitch can be reduced significantly without adversely affecting the electric field magnitude at the CNT tips. Reducing the pitch will increase total array current density by increasing the total number of array elements. The same principle applies to the element dimensions. Reducing the element dimensions results in stronger electric fields and increases the total number of elements, both of which will increase overall current density. The simulation results of element shape showed that a square element will potentially provide a better array fill factor without degrading the electric field strength; making it a better choice over a circular element of the same diameter. Finally, due to the dominant screening effects, the dielectric layer thickness and CNT height can be reduced significantly without decreasing the electric field strength. The resulting optimized CNT field emission array, shown below in Figure 61, that fits within current fabrication capabilities available for this research effort consists of a 0.5 μm circular element array with 0.5 μm pitch. The SiO2 dielectric layer can be reduced to 1 μm with a corresponding CNT height between 0.5 μm and 0.8 μm. The simulation results indicated a square element will perform better than a circular element. However, due to limitations of the current fabrication process, a circular element is used in the final design. Why is Wright-Patterson Air Force Base interested in field emissions via carbon nanotubes from a conductive surface? This gets my conspiracy juices flowing. If Rossi is using this kind of stuff from his partners, we have a long way to go. Cheers: Axil An interesting picture: http://www.sciencephoto.com/image/343125/350wm/T1940196-Static_electricity_sparks-SPL.jpg On Sun, Jul 22, 2012 at 10:00 PM, Jojo Jaro <[email protected]> wrote: > ** > Axil, I believe this is a similar paper but not the exact paper. I have a > feeling that the paper I am looking for may contain the key. > > > I run into what appears to me to be intractable problems with the Build > and Peel method: > > 1. The Build and Peel method seems to be more complicated and appears to > be beyond my capability. > 2. I'm looking for a method that allows me to integrate a CVD step > followed directly by the Spark Discharge step. CVD is required to grow > highly oriented CNTs (Vertically aligned) while the sparking allows charge > accumulation to occur. > 3. The reactor that is needed is more complicated in my analysis. > 4. I am pursuing a hypothesis that may not require nickel for H+ and H+ > fusion to occur. > 5. I need to use Iron Pentacarbonyl to enhance growth of metallic SWNTs > and make sure they are vertically aligned directly on my reactor. > > Overall, I do not like the build and peel method when there appears to be > a more straightforward process. The peeling and attaching of the SWNT rug > appears to be fragile and would corrupt the orientation of the Vertically > Aligned SWNTs. > > > Jojo > > > > > > ----- Original Message ----- > *From:* Axil Axil <[email protected]> > *To:* [email protected] > *Sent:* Monday, July 23, 2012 9:32 AM > *Subject:* Re: [Vo]:The SWNT rug part 1 > > http://144.206.159.178/ft/145/605877/14779411.pdf > > > > > Those carpets look poorly to me and are not as beautiful and organized as > the Rice products. > > You don't like the build and peel method? > > > Cheers: Axil > > On Sun, Jul 22, 2012 at 8:44 PM, Jojo Jaro <[email protected]> wrote: > >> ** >> Axil's post has prompted me to search for CNT rug methods and has led me >> to this paper. Does anyone have access to this paper, and can you help. >> "Direct Growth of Aligned Multiwalled Carbon Nanotubes on Treated Stainless >> Steel Substrates" >> >> http://pubs.acs.org/doi/full/10.1021/la7012232 >> >> >> I strongly suspect this might be similar to the process Rossi uses to >> build his Vertically Aligned CNT rug, as used in his fat-cat and his new >> 600c "cigarette-sized" home reactor. Folks, we are zeroing in of Rossi's >> trade secrets. >> >> >> I am currently out of the country and my credit cards have been >> temporarily suspended by my banks for security reasons, so I can't order >> this myself. If you have a subscription to this or if you have purchased >> this before, maybe you can share. >> >> >> >> Jojo >> >> >> > >
