WebMay 24, 2011 · Graphene-on-paper sound source devices are made by patterning graphene on paper substrates. Three graphene sheet samples with the thickness of 100, 60, and 20 nm were fabricated. Sound... Beyond its thermal properties, graphene plays two further roles in the sound generation. First, its electrical properties can be tuned by the transistor gate. This tuning could be used to switch or modulate the sound output. Second, it allows us to invert our original question: could we use the sound generation to … See more Second harmonic sound generation results from a source driven by a single frequency ac current. An example of this is shown in Fig. 1b. We used this to investigate the … See more By adding a dc current to the ac current, sound can be generated at the same frequency as the source. This first harmonic generation can be seen in Fig. 1a to result from the combination of the sum and … See more The sound generation and gate control can be used to investigate the conduction mechanisms in the graphene. If the bias-normalised sound pressure in Fig. 5b is further normalised by the resistance, it should be constant … See more By sourcing ac currents at two frequencies, acoustic heterodynes can be generated at the sum and difference of these frequencies. The power at the heterodynes, is a … See more
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WebJun 28, 2011 · The application of graphene can be expanded in the acoustic field. Graphene-on-paper sound source devices are made by patterning graphene on paper … WebApr 6, 2024 · The discharged device appears dark gray owing to the high absorptivity (>80%) of the top graphene layer in the visible regime. When the device is fully charged … chimney repair companies near westchester
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WebAug 12, 2024 · All the devices, including transistors, sensors, diodes, solar cells, and batteries were assembled along polymer wires or at their cross-nodes and then integrated as IC function modules for... WebSep 8, 2024 · The graphene oxide is converted into graphene by a 450 nm laser with a one-step process. The performance of the graphene sound device is affected by the laser power, the scanning speed, and the substrate thickness. The experimental results match well with the theoretical results. WebMar 16, 2012 · Graphene earphones, packaged into commercial earphone casings can play sounds ranging from 100 Hz to 50 kHz and are demonstrated that a dog wearing a graphene earphone could also be trained and controlled by 35 kHz sound waves. 93 Graphene acoustic transducers based on electromagnetic interactions. chimney repair companies