Wow, graphene just keeps revealing its strange properties. We already know that graphene exhibits the lowest resistance at room temperature of any known substance, and we know that exposing graphene to pure hydrogen will cause it to spontaneously convert to defect-free diamond at room temperature and no pressure, and we know that if we created such diamond material in a strong electrical field it would create an ultra-strong electret material owing to the extremely high dielectric strength of diamond, but now it's been discovered that if you create a tapered-shape graphene sheet, then stretch it, a pseudomagnetic field (ie: a magnetic field without using electricity or a permanent magnet) is created.
Since you can vary the amount of strain imparted to the graphene, you can vary the strength of the magnetic field, and the field strength is quite substantial... up to 300 Tesla. Conventional permanent magnets seldom go above 1 Tesla.
I'd discussed a method of growing large graphene sheets in a sugar bath here:
http://open-source-energy.org/?topic=1956.msg34943#msg34943Quote from Cycle on November 13th, 2015, 03:53 PM So, if one were to build out a number of these graphene sheets in a tapered shape, stacked them together, then stretched them, it'd make the world's most powerful magnet, it'd be variable, and I'm betting the force necessary to strain the material is less than the energy able to be derived in the form of electricity, given that the pseudomagnetic effect of graphene is a quantum effect brought about by molecular alignment, with the magnetic field deriving its energy from the QVZPE field, not from any energy input from the macro world.
I envision a stationary generator that merely places and releases a strain upon the graphene sheets, with coils on either side of the graphene sheets to convert the fluctuating magnetic field into electricity.
http://phys.org/news/2015-12-powerful-pseudomagnetic-fields-graphene.html
http://journals.aps.org/prl/abstract/10.1103/PhysRevLett.115.245501
Since you can vary the amount of strain imparted to the graphene, you can vary the strength of the magnetic field, and the field strength is quite substantial... up to 300 Tesla. Conventional permanent magnets seldom go above 1 Tesla.
I'd discussed a method of growing large graphene sheets in a sugar bath here:
http://open-source-energy.org/?topic=1956.msg34943#msg34943
6) An easy way to make large-sized graphene: sugar. Yeah, sounds weird. But graphene is "self-repairing" when it's in contact with carbon-rich compounds such as sugar or hydrocarbons and subjected to energetic conditions. It'll grab carbon from that carbon rich compound and add it into its matrix of graphene, growing as it goes or repairing any holes in itself. So you put graphite powder and soapy water (ie: water and a surfactant) into a high-speed blender to shear out small graphene patches, blend on "High" for a long time, separate out the graphite from the graphene, wash out the surfactant, paint a plexiglass sheet with sugar water, let it dry, paint the plexiglass sheet with the graphene, then hit it with a laser to provide the energy for the graphene to grab the carbon from the sugar and self-replicate / self-repair into a contiguous sheet of graphene. Once you're sure your graphene is contiguous, wash with water to remove impurities.
7) I wonder if it would be possible to grow graphene in-situ... in a sugar water bath within a square transparent container, you start with a small patch of graphene that was cleaved from a hunk of graphite, hanging in the water from an attachment at the top of the container. You hit the hanging graphene with a laser to provide the energy to the graphene to requisition that carbon in the sugar water for itself in order to grow / self repair. The graphene should self-assemble into a contiguous sheet around the hanging graphene patch. Since you can control where the laser points, you can control the size and shape of the graphene sheet you're constructing. Because it's in a sugar water bath rather than on a substrate, you don't have to worry about contamination or changing the electrical properties of the graphene due to the surface it's being built on, since there isn't one. The assembly process could even be computer automated... pristine graphene (ie: no defects) when subjected to 30-fs pulses from a Ti:sapphire laser exhibits photo-luminescence. So if your laser is hitting a patch of graphene and your photo-detector sees no photo-luminescence, it continues to stay in that spot to build out that section of the graphene sheet. If it sees photo-luminescence, the computer controlling laser position knows to move on to the next spot.
I envision a stationary generator that merely places and releases a strain upon the graphene sheets, with coils on either side of the graphene sheets to convert the fluctuating magnetic field into electricity.
http://phys.org/news/2015-12-powerful-pseudomagnetic-fields-graphene.html
http://journals.aps.org/prl/abstract/10.1103/PhysRevLett.115.245501