Cellulose-Nanofiber-Based Layered Sub-Terahertz Absorbing Sheets for B5G/6G Applications

Kato, Kosaku; Feng, Shiyu; Zhao, Zixi et al.

Advanced Materials Technologies, 2025

Number of Access:280（2026-04-04 23:05 Counts）

Identifier to cite or link to this item: https://hdl.handle.net/11094/103581

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Title
Cellulose-Nanofiber-Based Layered Sub-Terahertz Absorbing Sheets for B5G/6G Applications
Creator
NRID
1000040751087 1000040751087
ORCID
0000-0002-9977-7439 0000-0002-9977-7439
researchmap permalink
kosakukato kosakukato
Scopus Author ID
57189303489 57189303489
CreatorName
Kato, Kosaku
CreatorName
Feng, Shiyu
CreatorName
Zhao, Zixi
ORCID
0000-0002-5408-5148 0000-0002-5408-5148
researchmap permalink
verdadagulto verdadagulto
Scopus Author ID
57194092779 57194092779
CreatorName
Agulto, Verdad C.
CreatorName
Mizui, Ami
NRID
1000040915584 1000040915584
ORCID
0000-0002-3576-943X 0000-0002-3576-943X
researchmap permalink
tkasuga tkasuga
Scopus Author ID
57200625503 57200625503
CreatorName
Kasuga, Takaaki
NRID
1000040984745 1000040984745
ORCID
0000-0002-9207-3586 0000-0002-9207-3586
researchmap permalink
ShunIshioka ShunIshioka
Scopus Author ID
57215051087 57215051087
CreatorName
Ishioka, Shun
NRID
1000080379031 1000080379031
researchmap permalink
read0151141 read0151141
Scopus Author ID
9846851200 9846851200
CreatorName
Nogi, Masaya
CreatorName
Ota, Ichiro
CreatorName
Haga, Motoharu
CreatorName
Ueshima, Minoru
NRID
1000040361662 1000040361662
ORCID
0000-0002-0351-2197 0000-0002-0351-2197
researchmap permalink
nakajimamakoto nakajimamakoto
Scopus Author ID
55236697600 55236697600
CreatorName
Nakajima, Makoto
Subject
carbon-nanotubes
cellulose-nanofibers
terahertz absorbers
Description
Kato K., Feng S., Zhao Z., et al. Cellulose-Nanofiber-Based Layered Sub-Terahertz Absorbing Sheets for B5G/6G Applications. Advanced Materials Technologies , (2025); https://doi.org/10.1002/admt.202501829.
Abstract
For the sustainable development of beyond fifth-generation (B5G) or sixth-generation (6G) wireless communication technologies operating in the sub-terahertz and terahertz range, it is highly desirable to utilize environmentally friendly materials in B5G/6G devices. Here, we report a sub-terahertz absorbing sheet made of biodegradable cellulose-nanofiber (CNF), which can be useful for achieving electromagnetic compatibility (EMC) in B5G/6G devices in a green manner. The absorber consists of one pure CNF layer sandwiched between two layers of carbon-nanotube (CNT)-dispersed CNF layers. The CNT concentration is engineered to be low (0.15 wt.%) in the layer on the wave-incident side and high (6 wt.%) in the layer on the opposite side, emulating the resistive and reflective layers of a Salisbury screen absorber, respectively. The total thickness of our absorber is as thin as 120 µm. Terahertz time-domain spectroscopy (THz-TDS) reveals its good shielding effectiveness of 28.5 dB, low reflectance of 2.5%, and high absorptance of 97.4% at 300 GHz. Additionally, an absorptance higher than 80% is achieved over a broadband frequency range from 250 to 480 GHz. Good agreement between the measured results and calculated results based on the ABCD matrix method confirms that the cancellation of reflected waves is realized as designed.
Publisher
John Wiley and Sons Inc
Source Title
Advanced Materials Technologies
Date of Issued
2025-11-26
Language
English
Handle URL
https://hdl.handle.net/11094/103581
eISSN
2365709X
Relation.isIdenticalTo
DOI (Publisher Version)
https://doi.org/10.1002/admt.202501829
Access Rights
open access
CopyRight
This article is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.
oaire:version
Version of Record
Category
学術雑誌論文 Journal Article