Abstract: A method for making a graphene/carbon nanotube composite structure includes providing a metal substrate including a first surface and a second surface opposite to the first surface, growing a graphene film on the first surface of the metal substrate by a CVD method, providing at least one carbon nanotube film structure on the graphene film, and combining the at least one carbon nanotube film structure with the graphene film, coating a polymer layer on the at least one carbon nanotube film structure, and combining the polymer layer with the at least one carbon nanotube film structure and the graphene film, and forming a plurality of stripped electrodes by etching the metal substrate from the second surface.

Abstract: The present disclosure relates to a method for making a graphene/carbon nanotube composite structure. In the method, at least one graphene film is located on a substrate. At least one carbon nanotube layer is combined with the at least one graphene film located on the substrate to form a substrate/graphene/carbon nanotube composite structure. The at least one graphene film is in contact with the at least one carbon nanotube layer in the substrate/graphene/carbon nanotube composite structure. The substrate is removed from the substrate/graphene/carbon nanotube composite structure, thereby forming a graphene/carbon nanotube composite structure.

Abstract: A method for making a graphene/carbon nanotube composite structure includes providing a metal substrate including a first surface and a second surface opposite to the first surface, growing a graphene film on the first surface of the metal substrate by a CVD method, providing at least one carbon nanotube film structure on the graphene film, and combining the at least one carbon nanotube film structure with the graphene film, and combining the polymer layer with the at least one carbon nanotube film structure and the graphene film, and forming a plurality of stripped electrodes by etching the metal substrate from the second surface.

Abstract: An apparatus for detecting electromagnetic waves includes a first electromagnetic wave sensor, two first electrodes, a second electromagnetic wave sensor, and two second electrodes. The two first electrodes are electrically connected to different portions of the first electromagnetic wave sensor. The second electromagnetic wave sensor crosses with and is spaced from the first electromagnetic wave sensor. The two second electrodes are electrically connected to different portions of the second electromagnetic wave sensor.

Abstract: A flexible thermoacoustic device includes a soft supporter and a sound wave generator. The sound wave generator is located on a surface of the softer supporter. The sound wave generator includes a carbon nanotube structure. The carbon nanotube structure includes a plurality of carbon nanotubes combined by van der Waals attractive force.

Abstract: An illuminating device includes a holding element, a light source, and an acoustic member. The acoustic member includes a carbon nanotube structure.

Abstract: A thermoacoustic device includes a sound wave generator and a signal input device. The sound wave generator includes a composite structure. The composite structure includes a carbon nanotube film structure and a graphene film. The carbon nanotube film structure includes a number of carbon nanotubes and micropores. The graphene film is located on a surface of the carbon nanotube film structure, and covers the micropores.

Abstract: A graphene/carbon nanotube composite structure includes a carbon nanotube film structure and a graphene film. The carbon nanotube film structure includes a number of carbon nanotubes. The carbon nanotubes form micropores. The graphene film is located on a surface of the carbon nanotube film structure. The graphene film covers the micropores.

Abstract: A thermoacoustic device includes a substrate, at least two sound wave generators and at least two signal input devices. The substrate has at least two surfaces. Each of the at least two sound wave generators is located on each of the at least two surfaces. At least one of the at least two sound wave generator includes a carbon film. The carbon film includes at least one carbon nanotube layer and at least one graphene layer stacked with each other. The at least two signal input devices are configured to input signals to the at least two sound wave generator separately.

Abstract: A thermoacoustic device includes a substrate, a sound wave generator and a signal device. The substrate has a net structure and includes a number of first wires and a number of second wires. The first wires and the second wires are crossed with each other. Each of the first wires includes a composite wire. The composite wire includes a carbon nanotube wire structure and a coating layer wrapping the carbon nanotube wire structure. The sound wave generator is located on a surface of the substrate and includes a graphene layer including at least one graphene. The signal input device is configured to input signals to the sound wave generator.

Abstract: A thermoacoustic device includes a carbon nanotube composite structure, a sound wave generator and a signal input device. The carbon nanotube composite structure includes a carbon nanotube structure and a matrix. The matrix is located a surface of the carbon nanotube structure. The sound wave generator is located on a surface of the carbon nanotube composite structure and insulated from the carbon nanotube structure via the matrix. The sound wave generator includes a graphene layer including at least one graphene. The signal input device is configured to input signals to the sound wave generator.

Abstract: A thermoacoustic device includes a carbon nanotube composite structure, a sound wave generator and a signal input device. The carbon nanotube composite structure includes a carbon nanotube structure and a matrix. The matrix is located on a surface of the carbon nanotube structure. The sound wave generator is located on a surface of the carbon nanotube composite structure and insulated from the carbon nanotube structure via the coating layer. The sound wave generator includes a carbon film. The signal input device is configured to input signals to the sound wave generator.

Abstract: A thermoacoustic device includes a substrate, at least two sound wave generators and at least two signal input devices. The substrate has at least two surfaces. Each of the at least two sound wave generators is located on each of the at least two surfaces. At least one of the at least two sound wave generator includes a carbon film. The carbon film includes at least one carbon nanotube layer and at least one graphene layer stacked with each other. The at least two signal input devices are configured to input signals to the at least two sound wave generator in a one by one manner.

Abstract: A thermoacoustic device includes a substrate, a sound wave generator and a signal device. The substrate has a net structure and includes a number of first wires and a number of second wires. The first wires and the second wires are crossed with each other. Each of the first wires includes a composite wire. The composite wire includes a carbon nanotube wire structure and a coating layer wrapping the carbon nanotube wire structure. The sound wave generator is located on a surface of the substrate and includes a carbon film. The signal input device is configured to input signals to the sound wave generator.

Abstract: A thermoacoustic device includes a sound wave generator and a signal input device. The sound wave generator includes a graphene layer. The graphene layer includes at least one graphene. The signal input device inputs signals to the sound wave generator.

Abstract: A thermoacoustic device includes a sound wave generator and a signal input device. The sound wave generator includes a carbon film. The carbon film includes at least one carbon nanotube layer and at least one graphene layer stacked on each other. The signal input device inputs signals to the sound wave generator.

Abstract: A thermoacoustic device. The thermoacoustic includes a carbon nanotube structure. The carbon nanotube structure is at least partly in contact with a liquid medium. The thermoacoustic device is capable of causing a thermoacoustic effect in the liquid medium.

Abstract: An acoustic system includes a sound-electro converting device, a electro-wave converting device, and a sound wave generator. The electro-wave converting device is connected to the sound-electro converting device. The sound wave generator is spaced from the electro-wave converting device and includes a carbon nanotube structure. The sound-electro converting device converts a sound pressure to an electrical signal and transmits the electrical signal to the electro-wave converting device. The electro-wave converting device emits an electromagnetic signal corresponding to the electrical signal and transmits the electromagnetic signal to the carbon nanotube structure. The carbon nanotube structure converts the electromagnetic signal into heat, and the heat transfers to a medium causing a thermoacoustic effect.

Abstract: An apparatus includes an electromagnetic signal device, a medium, and a sound wave generator. The sound wave generator includes a carbon nanotube structure. The electromagnetic signal device transmits an electromagnetic signal to the carbon nanotube structure. The carbon nanotube structure converts the electromagnetic signal into heat. The heat transfers to the medium and causes a thermoacoustic effect.

Abstract: An elastic device includes a first elastic supporter; a second elastic supporter and a carbon nanotube film. The second elastic supporter is spaced from the first elastic supporter. The carbon nanotube film has a first side fixed on the first elastic supporter and a second side opposite to the first side and fixed on the second elastic supporter. The carbon nanotube film includes a plurality of carbon nanotube strings separately arranged, located side by side and extending substantially along a first direction from the first side to the second side and one or more carbon nanotubes located between adjacent carbon nanotube strings. The carbon nanotube film is capable of elastic deformation along a second direction that is substantially perpendicular to the first direction.