Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

Development of Microwave Filters with Tunable Frequency and Flexibility using Carbon Nanotube Paper

Version 1 : Received: 5 August 2023 / Approved: 7 August 2023 / Online: 7 August 2023 (10:16:17 CEST)

A peer-reviewed article of this Preprint also exists.

Liu, J.-H.; Huang, Y.-S. Development of Microwave Filters with Tunable Frequency and Flexibility Using Carbon Nanotube Paper. Nanomaterials 2023, 13, 2497. Liu, J.-H.; Huang, Y.-S. Development of Microwave Filters with Tunable Frequency and Flexibility Using Carbon Nanotube Paper. Nanomaterials 2023, 13, 2497.

Abstract

This study aims to exploit the distinctive properties of carbon nanotube materials, which are particularly pronounced at the microscopic scale, by deploying fabrication techniques that allow their features to be observed macroscopically. Specifically, we aim to create a semiconductor device that exhibits flexibility and the ability to modulate its electromagnetic wave absorption frequency by means of biasing. Initially, we fabricate a sheet of carbon nanotubes through a vacuum filtration process. Subsequently, phosphorus and boron elements are separately doped into the nanotube sheet, enabling it to embody the characteristics of a PN diode. Measurements indicate that, in addition to the fundamental diode's current-voltage relationship, the device also demonstrates intriguing transmission properties under the TEM mode of electromagnetic waves. It exhibits a frequency shift of approximately 2.3125 GHz for each volt of bias change. The final result is a lightweight and flexible carbon-based semiconductor microwave filter, which can conform to curved surfaces. This feat underscores the potential of such materials for innovative and effective electromagnetic wave manipulation.

Keywords

Carbon Nanotube Paper; bucky paper; diode; microwave; filter

Subject

Chemistry and Materials Science, Nanotechnology

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