Currently, scientists are still often attempt to vacuum tubes (vacuumtubes) for micro-transformation, but not many success stories, mainly because of the kinds of glass packaging in most applications, the valve has been replaced by transistors. The University of Illinois at Urbana-Champaign (UniversityofIllinoisatUrbana-Champaign) researchers argued that vacuum tubes can be used to as a high-energy-density batteries, or non-volatile memory of the base; said that, in theory, nano-sized array of the energy density of vacuum tubes up to three times the COMPAQ PRESARIO R3000 Laptop Battery. Researchers at the University of Illinois AlfredHubler with OnyeamaOsuagwu, published an article entitled: “Digital Quantum batteries: The energy and density of nano-tube array is stored in the” paper, but research is still theoretical, yet practical verification. The paper is based on the establishment of the presence of emission devices (field-emissiondevices) has clearly allows the study of current through the structure; authors claim that the field emission device of nano-level through appropriate design, be able to Electrical Breakdown (electricbreakdown) to the quantum of the phenomenon of compression; in the gap distance of 10 nm, under its capacitance is very large. The nano-tube array structure, the critical spacing is slightly larger than the 10 nm distance to the cathode, anode, cathode rules to vertical alignment, with today’s advanced lithography nodes fairly. Authors pointed out that the vacuum energy density is subject to a vacuum breakdown (vacuumbreakdown) is limited, but in atmospheric pressure below the 106torr circumstances, the electrical field would not rely on residual gas (residualgas), but with the electrode surface characteristics. Paper pointed out that the nano-tube energy / power density than lithium-ion batteries and electrochemical capacitors (electrochemicalcapacitors), the estimated weight per kg energy density up to 1-Mjoule, while the volume energy density per cubic meter up to 3-Gjoules. And this number of quantum battery (although it requires the number of 1 billion combined into an array of vacuum tubes), there are many other advantages. First, the tube can be a traditional wafer lithography technology and application of metal materials, silicon substrate to produce and can be done using silicon oxide as the insulating tube wall; the anode material is recommended for carbon nanotubes, cathode materials, you can use tungsten (tungsten). In addition, the battery can easily be integrated into the IC substrate, the chip that can be used as rechargeable batteries. The vacuum tube array, there are other advantages, including its charge and discharge frequency will exceed all the other components; authors also pointed out that nano-tubes can be maintained due to the electrical energy of a few years without losing, it may also be used as nonvolatile memory components.

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Currently, scientists are still often attempt to vacuum tubes (vacuumtubes) for micro-transformation, but not many success stories, mainly because of the kinds of glass packaging in most applications, the valve has been replaced by transistors.