8:20am YZrO2 dental platelets. Puts tension on the tooth and closes the cracks. Thanks for the life story about how you made the process. He ultimately gets some phase and site that he wants. Many many years from application, but a good idea.
8:40 Ag clusters on TiO2. At least this is a science talk, as opposed to Mr "I'm an engineer, mechanism doesn't bear mentioning." RCT mentioned 10 minutes into the talk. This is a negative result, but I guess negative results need to be reported more.
9:00 Pulse laser deposition of double functional perovskites. Magnetic field effects capacitance in La2NiMnO6. Wait, T_c is the Curie temperature? Who says that? "Superexchange"? This is the lowest attendance I've ever seen for an invited talk. I'm dying. People are walking out, they can't have another talk to go to [it was in between starting times]. Bailing.
Caught the end of Diebold's talk. Standing room only! Stuffy as hell in here, there are at least 100 people. No surprise, it's STM from molecules on TiO2. [Alex says she covered DFT that showed subsurface vacancies are energetically favored over surface]. Emphasizes importance of doing stuff on both rutile and anatase.
9:40am Omg it's a sauna in here. O_bridge manipulation by STM, but who cares I'm hot. Flirty languid girl from PEC is in the audience. Actually, there's another good looking chick. What's going on here? Ok, way to treat us like morons, guy. I think we know what a time constant fit is. Who the hell is running this session? It's going to end up 20 minutes late. Since when is TiO2 a topic? Mechanism is lowering energy barrier for vacancy by charge mechanism to below the thermal barrier.
10:00am (actually 10:12) TPD of O2 physisorbed on TiO2. Saturates at 1.5 ML. Kink in the integrated TPD signal at the chemisorption limit. (2 O2 molecules per vacancy at low temp). Is this really new? How could nobody have done this yet? O2 dosed at 25K shows O2 desorption with photon stimulated desorption.
11:00am Tungsten coated fibers by ALD for electronic smart shirts. Making regular fibers like cotton conductive. 4-point probe measurements of fiber network. Large probes to contact many of the fibers. Wow, this guy is just putting glass slides on the fibers and using alligator clips for his measurement. Loading more weight on the glass slide lowers the resistivity until all fibers are in contact. Reversible for W-coated fibers, but not for ZnO fibers. neat.
11:20am Co capping on low K contacts w/ CVD SAMS. Trying to solve metal atom diffusion. Very slick presenter. Why is the ALD only putting down 1/2 angstrom per cycle. Why won't it all react? Odd. XPS shows no Cu 2p level after 2 mins of cycling. Pretty good selectivity for capping Cu, but only 3:1 for Cu to SiO2. He has to passivate a lot to get the selectivity better. Interminable XPS and RBS follows.
11:40am XPS chemisorption transitioning to steady-state film growth. I'm too tired for this, it's quite disorganized.
2:00pm Stroscio, zero mass carriers in graphene. --Aside: people in the audience think it's HILARIOUS that there's a 5 x 10^12 nm run on Wednesday. Me too, actually; I don't think any of these cream puffs is running a 5K.-- sp2 state bonding of graphene means that there's a simple hamiltonian of Bloch waves (no diagonal entries) in the tight-binding calculation. Graphene can be made by simply heating SiC to 1300K (induced furnace method). Multilayers form, but are actually decoupled? First layers are essentially doped by Si levels, but by 10L it is practically undoped graphene. The Landau levels due to the Hamiltonian are E_n ~ sqrt(|n| B), n=0, +/- 1, ... levels are clearly visible on STM in a 2T field, even with the multilayers. The difference between the first and second Landau level is much bigger than in a metal, which is why NIST cares about it. Spectra are amazing, there's no conductance off the landau levels except residual from the lorentzians from the previous levels. Very large MFP, tau~0.4 ps. high mobility carriers. The layers decouple because of the layer misalignment. Moire effects are seen on STM prove the misalignment. Very small potential variations even if the graphene goes over a bump. Amazing.
2:40pm Oh good, a grad student subbing for an invited talk. This is very humdrum stuff about tailored catalysts. Why is this an invited talk. Ok, the guy next to me is snoring WHILE HE'S AWAKE. Plasmon resonators stuck onto other nanoparticles to aid in photon capture. Huh. Well, that's the first non-banal thing he's said.
3:40 Kelvin prove w/ cantilever? He never defines Fermi level pinning. Can't explain discrepancy between kelvin probe work function and sts work function. "something we don't understand yet." Right. No hypothesis, guess, anything? InAs(110) is unpinned, InAs(001) 4x2 is pinned.
4:20 Adsorbates on graphene. Potassium deposited on graphene. sites in the middle of a cell, maintains symmetry (A and B sublattices act the same). Same w/ Xe buffer layer. Self-energy part of photoemission. Very low coefficient of friction measured by hysteresis loop area by dragging a tip across the surface. H bonds asymmetrically, changes the kink in the photoemission. Measures resistance with photon flux! He floats one side of the graphene and bombards with photons. H makes it an insulator, even though there's still a Fermi surface. That shouldn't happen. the mean free path has to be less than the fermi wavelength. Anderson localization, where you have mobile electrons, but the domains are so disordered that it becomes an insulator with a variable hopping distance. The quasiparticle model breaks down. Good system for many-body interactions.