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johannessimon81

New Form of Carbon is Stronger Than Graphene and Diamond - 0 views

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    "Chemists have calculated that chains of double or triple-bonded carbon atoms, known as carbyne, should be stronger and stiffer than any known material."
santecarloni

Sharpening the Nanofocus: Berkeley Lab Researchers Use Nanoantenna to Enhance... - 0 views

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    See Also: Matter & Energy Nanotechnology Optics Physics Materials Science Graphene Organic Chemistry Reference White gold Electromagnetic radiation Nanomedicine Nanoparticle Any use for the smell project? "We have demonstrated resonant antenna-enhanced single-particle hydrogen sensing in the visible region and presented a fabrication approach to the positioning of a single palladium nanoparticle in the nanofocus of a gold nanoantenna,"
johannessimon81

Exotic Quantum Effects Could Follow from Compound Now Confirmed to Conduct Only at Surface - 1 views

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    Samarium hexaboride seems to be a topological insulator as a bulk material. It conducts electricity only at its surface, i.e., in a 2D layer (like graphene). This might allow all kinds of exotic (quantum) effects...
jcunha

Europe plans giant billion-euro quantum technologies project - 0 views

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    After graphene and blue brain, the European Commission has quietly announced plans to launch a €1-billion Euro project to boost a raft of quantum technologies - from secure communication networks to ultra-precise gravity sensors and clocks.
LeopoldS

[1202.4993] Gate-tuning of graphene plasmons revealed by infrared nano-imaging - 0 views

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    Basis for after next generation processors?
LeopoldS

Directed Growth of Silk Nanofibrils on Graphene and Their Hybrid Nanocomposites - ACS M... - 0 views

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    of interest to Tom's project?
aborgg

Electron waves refract negatively - 1 views

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    Waves of electrons have been bent backward in a sheet of graphene, allowing physicists to focus electrons the way a lens focuses light. Electrons coursing through a sheet of carbon atoms exhibited negative refraction, bending at angles not seen in nature. By exploiting this unusual bending, the researchers created a lenslike device to focus the electrons to a tiny point. The new technique could help physicists learn how to manipulate electrons in the tight confines of miniaturized electronic devices, where the particles often behave like waves.
jcunha

Nature: Spawning rings of exceptional points out of Dirac cones - 3 views

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    Dirac cones, a band-structure of two cones touching each other, are the key to understand graphene exceptional properties. They also appear in the theory of photon waveguides and atoms in optical lattices. In here, the study of a Dirac cone deformation in an open system (a system that is perturbed by external agents) lead to the deformation of the Dirac cone, meaning a change in the fundamental properties of the system. This change is such that strange phenomena such as unidirectional transmission or reflection or lasers with single mode (really single) operation can be achieved. Proved experimentally in photonic crystals. New way for extremely pure lasers?
santecarloni

[1010.3437] Dynamical mass generation via space compactification in graphene - 0 views

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    Is it really possible?
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    The affiliation is Saudi Arabia and Marocco, not countries famous for their contributions to physics... But nonetheless, yes this is possible, to me it even looks very plausible! But you should know that the term "mass" in this context just means a certain parameter in the dynamical equations and only has a loose relation to what we usually call "mass" in the macroscopic world.
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    ok - admit that I only read the abstract but to me the seems to be a little bit of magic happening ... even if "mass is only a certain parameter in the dynamical equations" ... I assume it still bears some "heavy" consequences in terms of their speed, interactions etc, no? and assuming that you gradually bend such a structure from a 2D to a 1D one ... does it "gain" mass gradually? all very strange to me ...
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    I think the problem is in the boundary conditions... the issue is that if you use and infinite sheet or a cylinder in the equations you always take cyclic boundary condition. If this guys are right then the mass of the quasi-particles in a crystal depends on its topology... this is a major thing...
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    BINGO!! It's almost like good ol' Kaluza-Klein...
LeopoldS

Access : Surface-assisted cyclodehydrogenation provides a synthetic route towards easil... - 0 views

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    one step forward .... how many left to get it into commercial products ... and for space?
Luzi Bergamin

FuturICT: FuturIcT - 2 views

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    FuturICT, another of these nonsense-flagships. Marek: after having read about this, I understand that BlueBrain is not the only flagship proposal that sucks. Long live the dream of cybernetics, or, apparently people never learn anything...
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    The others: http://www.ga-project.eu/ - "Guardian Angels for a Smarter Planet" http://www.humanbrainproject.eu/ http://www.itfom.eu/ http://www.robotcompanions.eu/ One doesn't have a website (graphene). The message from their presentation was more or less: everyone else does intensive research in this and the Europe should not stay behind. Full list of flagship proposals including short descriptions here: http://www.fet11.eu/about/fet-flagships
Luzi Bergamin

Prof. Markrams Hirnmaschine (Startseite, NZZ Online) - 2 views

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    A critical view on Prof. Markram's Blue Brain project (in German).
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    A critical view on Prof. Markram's Blue Brain project (in German).
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    so critical that the comment needed to be posted twice :-) ?
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    Yes, I know; I still don't know how to deal with this f.... Diigo Toolbar! Shame on me!!!
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    Would be nice to read something about the modelling, but it appears that there is nothing published in detail. Following the article, the main approach is to model each(!) neuron taking into account the spatial structure of the neurons positions. Once achieved they expect intelligent behaviour. And they need a (type of) supercomputer which does not exist yet.
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    As far as I know it's sort of like "Let's construct an enormous dynamical system and see what happens"... i.e. a waste of taxpayer's money... Able to heal Alzheimer... Yeah... Actually I was on the conference the author is mentioning (FET 2011) and I have seen the presentations of all 6 flagship proposals. Following that I had a discussion with one of my colleagues about the existence of limits of the amount of bullshit politicians are willing to buy from scientists. Will there be a point at which politicians, despite their total ignorance, will realise that scientists simply don't deliver anything they promise? How long will we (scientists) be stuck in the viscous circle of have-to-promise-more-than-predecessors in order to get money? Will we face a situation when we'll be forced to revert to promises which are realistic? To be honest none of the 6 presentations convinced me of their scientific merit (apart from the one on graphene where I have absolutely no expertise to tell). Apparently a huge amount of money is about to be wasted.
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    It's not just "Let's construct an enormous dynamical system and see what happens", it's worse! Also the simulation of the cosmological evolution is/was a little bit of this type, still the results are very interesting and useful. Why? Neither the whole cosmos nor the human brain at the level of single neurons can be modelled on a computer, that would last aeons on a "yet-to-be-invented-extra-super-computer". Thus one has to make assumptions and simplifications. In cosmology we have working theories of gravitation, thermodynamics, electrodynamics etc. at hand; starting from these theories we can make reasonable assumptions and (more or less) justified simplifications. The result is valuable since it provides insight into a complex system under given, explicit and understood assumptions. Nothing similar seems to exist in neuroscience. There is no theory of the human brain and apparently nobody has the slightest idea which simplifications can be made without harm. Of course, Mr. Markram remains completely unaffected of ''details'' like this. Finally, Marek, money is not wasted, we ''build networks of excellence'' and ''select the brightest of the brightest'' to make them study and work at our ''elite institutions'' :-). I lively remember the stage of one of these "bestofthebest" from Ivy League at the ACT...
ESA ACT

Large-scale pattern growth of graphene films for stretchable transparent electrodes : A... - 0 views

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    wow ... look at this!
Thijs Versloot

Hydrogen storage in Graphene Origami nanoboxes - 2 views

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    A total storage of 9.5 wt% H2 could be reached which is above the 7.5wt% set by the DoE for market requirements of hydrogen vehicles. The nanoboxes can be opened and closed using electric fields.
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