Metal-graphene nanocomposites, metal-oxide-graphene nanocomposites, and method for their preparation are described. According to some embodiments, a metal salt is combined with graphite oxide (GO) to form a metal salt-GO composite. The metal salt-GO composite is reduced to a metal-graphene or metal oxide-graphene nanocomposite material. The metals may be magnetic or non-magnetic. In some embodiments, the reduction is conducted via exposure to intensified electromagnetic radiation, such as focused solar radiation.

Metal-graphene nanocomposites, metal-oxide-graphene nanocomposites, and method for their preparation are described. According to some embodiments, a metal salt is combined with graphite oxide (GO) to form a metal salt-GO composite. The metal salt-GO composite is reduced to a metal-graphene or metal oxide-graphene nanocomposite material. The metals may be magnetic or non-magnetic. In some embodiments, the reduction is conducted via exposure to intensified electromagnetic radiation, such as focused solar radiation.

A method for manufacturing a graphene composite film includes preparing a zeolite suspension containing zeolite nanocrystals with a concentration of 50-100 ppm and with a particle size of 50-80 nm. The zeolite suspension has a pH value of 11-13. A graphene oxide suspension containing graphene oxide with a concentration of 50-200 ppm is mixed with the zeolite suspension to form a composite solution. The composite solution is transferred into a 15 C. water bath when a color of the composite solution turns from brownish-yellow into deep brown. A surfactant is added into the composite solution in the 15 C. water bath. The composite solution is then sonicated for 5-30 minutes and removed out of the 15 C. water bath, with the color of the composite solution turning from deep brown into black. The composite solution is further processed to form a graphene composite film having not more than 5 layers.

A method for manufacturing a graphene composite film includes preparing a zeolite suspension containing zeolite nanocrystals with a concentration of 50-100 ppm and with a particle size of 50-80 nm. The zeolite suspension has a pH value of 11-13. A graphene oxide suspension containing graphene oxide with a concentration of 50-200 ppm is mixed with the zeolite suspension to form a composite solution. The composite solution is transferred into a 15 C. water bath when a color of the composite solution turns from brownish-yellow into deep brown. A surfactant is added into the composite solution in the 15 C. water bath. The composite solution is then sonicated for 5-30 minutes and removed out of the 15 C. water bath, with the color of the composite solution turning from deep brown into black. The composite solution is further processed to form a graphene composite film having not more than 5 layers.

A cable (100) is used for running a load between surface and downhole in a well. The cable includes one or more wires (110) composed of a non-metallic material. Each of the one or more wires (110) bears the load from the surface and electrically conducts between the surface and downhole. An insulating material (120) is disposed about the one or more wires (110) and insulates the electrical conduction. The non-metallic material includes a carbon nano-tube wire. A jacket (130) can be disposed about the insulating material (120), and the jacket (130) can be composed of a non-metallic material also, such as carbon nano-tube wire.

A cable (100) is used for running a load between surface and downhole in a well. The cable includes one or more wires (110) composed of a non-metallic material. Each of the one or more wires (110) bears the load from the surface and electrically conducts between the surface and downhole. An insulating material (120) is disposed about the one or more wires (110) and insulates the electrical conduction. The non-metallic material includes a carbon nano-tube wire. A jacket (130) can be disposed about the insulating material (120), and the jacket (130) can be composed of a non-metallic material also, such as carbon nano-tube wire.

A ceramic paste composition including carbon nanotubes or a carbon nanotube-metal composite and a silicone adhesive, wherein the silicone adhesive includes 0.1 to 10 wt % of a silanol group, and has a mole ratio of a phenyl group to a methyl group of 0.3 to 2.5. The ceramic paste composition has low sheet resistance, through which an excellent heat generating property, and shielding, absorbing and conducting properties may be implemented in one or more embodiments. Further, though the ceramic paste composition has a very high heat generating temperature of 400 C., as compared with general paste based on carbon nanotubes, the physical properties thereof may be maintained stably. In addition, the ceramic paste may be widely used in various fields including heat generating products such as those for keeping warmth or heating, and products for electromagnetic wave shielding and absorption, electrodes, electronic circuits, antennas, and the like.

A ceramic paste composition including carbon nanotubes or a carbon nanotube-metal composite and a silicone adhesive, wherein the silicone adhesive includes 0.1 to 10 wt % of a silanol group, and has a mole ratio of a phenyl group to a methyl group of 0.3 to 2.5. The ceramic paste composition has low sheet resistance, through which an excellent heat generating property, and shielding, absorbing and conducting properties may be implemented in one or more embodiments. Further, though the ceramic paste composition has a very high heat generating temperature of 400 C., as compared with general paste based on carbon nanotubes, the physical properties thereof may be maintained stably. In addition, the ceramic paste may be widely used in various fields including heat generating products such as those for keeping warmth or heating, and products for electromagnetic wave shielding and absorption, electrodes, electronic circuits, antennas, and the like.

The invention provides for polymer structures and their preparation and resulting novel functionalities including open-shell character and high intrinsic conductivity with wide-range tenability. Electrical conductivity can be further modulated by introducing or blending with materials, fillers, dopants, and/or additives. The materials or resultant composites of the invention can be processed by various techniques into different forms to realize multiple applications.

The invention provides for polymer structures and their preparation and resulting novel functionalities including open-shell character and high intrinsic conductivity with wide-range tenability. Electrical conductivity can be further modulated by introducing or blending with materials, fillers, dopants, and/or additives. The materials or resultant composites of the invention can be processed by various techniques into different forms to realize multiple applications.