Radiation Performance of Polarization Selective Carbon Nanotube Sheet Patch Antennas

Keller, Steven D.; Zaghloul, Amir I.; Shanov, Vesselin; Schulz, Mark J.; Mast, David; Alvarez, Noe T.

doi:10.1109/tap.2013.2287272

Cited by 27 publications

(14 citation statements)

References 29 publications

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“…Since the discovery of carbon nanotubes (CNTs) by Iijima in 1991 [1], they have drawn the attention of researchers across the world. The physical and chemical properties of CNTs enable their use in applications including supercapacitors [2,3], patch antennas [4,5], and fiber-reinforced composites [6][7][8][9][10][11], to mention a few among the different industrial, commercial, and defense applications. With the growing list of applications, there is a proportional increase in the global demand for CNTs.…”

Section: Introductionmentioning

confidence: 99%

Effect of a Metallocene Catalyst Mixture on CNT Yield Using the FC-CVD Process

et al. 2022

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This work studies synthesis of carbon nanotube (CNT) sheet using the high temperature (1400 °C) floating catalyst chemical vapor deposition (FC-CVD) method. Three metallocenes—ferrocene, nickelocene, cobaltocene—and their combinations are used as precursors for metal catalysts in the synthesis process. For the carbon source, an alcohol fuel, a combination of methanol and n-hexane (9:1), is used. First, the metallocenes were dissolved in the alcohol fuel. Then, the fuel mixture was injected into a tube furnace using an ultrasonic atomizer with Ar/H2 carrier gas in a ratio of about 12/1. The synthesis of CNTs from a combination of two or three metallocenes reduces the percentage of metal catalyst impurity in the CNT sheet. However, there is an increase in structural defects in the CNTs when using mixtures of two or three metallocenes as catalysts. Furthermore, the specific electrical conductivity of the CNT sheet was highest when using a mixture of ferrocene and cobaltocene as the catalyst. Overall, the multi-catalyst method described enables tailoring certain properties of the CNT sheet. However, the standard ferrocene catalyst seems most appropriate for large-scale manufacturing at the lowest cost.

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Section: Introductionmentioning

confidence: 99%

Effect of a Metallocene Catalyst Mixture on CNT Yield Using the FC-CVD Process

et al. 2022

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“…As emerging materials, graphene flakes (GFs), carbon nanotubes (CNTs) and Ag nanowires (NWs-Ag) have great advantages for antenna application, such as good bio-compatibility, and electrical and mechanical properties. In recent years, numerous methods have been proposed for the fabrication of these materials in antenna applications, such as inkjet printing, 4 transfer, 7 cutting operations by milling machines 5 and injecting liquid metal into microfluidic channels. 6 For example, CNTs hardened by resin infiltration were printed on both sides of the substrate and then cut by a milling machine to obtain a multiband antenna.…”

Section: Introductionmentioning

confidence: 99%

“… 6 For example, CNTs hardened by resin infiltration were printed on both sides of the substrate and then cut by a milling machine to obtain a multiband antenna. 5 A CNT-sheet patch antenna was proposed with CNT sheets laminated on the Teflon substrate or transferred to Kapton tape. 7 A wideband microwave antenna with highly conductive graphene was demonstrated with graphene-oxide/graphene composite annealed at 900 °C to achieve low ohmic resistance.…”

Section: Introductionmentioning

confidence: 99%

Ink-injected dual-band antennas based on graphene flakes, carbon nanotubes and silver nanowires

et al. 2018

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“…Recently, a CNT sheet patch antenna was reported with the CNT sheet laminated on the Teflon substrate or transferred to Kapton tape. 14 Nevertheless, these methods are not very suitable for cost-effective and high-accuracy micro-scale fabrication of UWB slot antennas, which require smaller size and more stable performance. Utilizing CNT as conductor for antennas in microwave region is still challenging due to the limited fabrication technology.…”

Section: Introductionmentioning

confidence: 99%