Impedance variation on lattice misoriented few-layer graphene via layer decoupling

Whan Kyun Kim, Juyeong Oh, Hyong Seo Yoon, Sun Jun Kim, Jae Young Park, Jeil Jung, Seong Chan Jun

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

We demonstrate radio frequency (RF) transmission characteristics in a layer stacked manner. Generally, as the number of graphene layers increases, the impedance is reduced and the transmission efficiency of monolayer graphene becomes better than that of chemically synthesized monolayer graphene. Depending on the stacking method, graphene may or may not be well aligned between layers; however, this characteristic affects the RF transmission. Graphene extracted from graphite is well aligned with other layers; however, synthesized graphene is randomly stacked because it is transferred and the layers are not aligned. Scattering parameters and the measured impedance shows that graphene extracted from graphite exhibits better transmission characteristics in the case of single-layer graphene, whereas synthesized graphene shows better transmission characteristics in the case of multiple-layer graphene. We calculated the change in conductivity based on the matched angle between layers of graphene and found that the conductivity was higher when the matching was less, compared to when it was well-matched. These results are also reflected in the impedance extracted from the scattering parameters. It was found that different impedance patterns are formed in single-layer graphene and in multiple layers for multi-layer graphene with stacking methods. This is because the layers are decoupled when they are randomly stacked.

Original languageEnglish
Article number8532140
Pages (from-to)55-61
Number of pages7
JournalIEEE Transactions on Nanotechnology
Volume18
DOIs
Publication statusPublished - 2019 Jan 1

Fingerprint

Graphene
Scattering parameters
Monolayers
Graphite

All Science Journal Classification (ASJC) codes

  • Computer Science Applications
  • Electrical and Electronic Engineering

Cite this

Kim, Whan Kyun ; Oh, Juyeong ; Yoon, Hyong Seo ; Kim, Sun Jun ; Park, Jae Young ; Jung, Jeil ; Chan Jun, Seong. / Impedance variation on lattice misoriented few-layer graphene via layer decoupling. In: IEEE Transactions on Nanotechnology. 2019 ; Vol. 18. pp. 55-61.
@article{86e66fa454b5488ab4fdebb145dd6c63,
title = "Impedance variation on lattice misoriented few-layer graphene via layer decoupling",
abstract = "We demonstrate radio frequency (RF) transmission characteristics in a layer stacked manner. Generally, as the number of graphene layers increases, the impedance is reduced and the transmission efficiency of monolayer graphene becomes better than that of chemically synthesized monolayer graphene. Depending on the stacking method, graphene may or may not be well aligned between layers; however, this characteristic affects the RF transmission. Graphene extracted from graphite is well aligned with other layers; however, synthesized graphene is randomly stacked because it is transferred and the layers are not aligned. Scattering parameters and the measured impedance shows that graphene extracted from graphite exhibits better transmission characteristics in the case of single-layer graphene, whereas synthesized graphene shows better transmission characteristics in the case of multiple-layer graphene. We calculated the change in conductivity based on the matched angle between layers of graphene and found that the conductivity was higher when the matching was less, compared to when it was well-matched. These results are also reflected in the impedance extracted from the scattering parameters. It was found that different impedance patterns are formed in single-layer graphene and in multiple layers for multi-layer graphene with stacking methods. This is because the layers are decoupled when they are randomly stacked.",
author = "Kim, {Whan Kyun} and Juyeong Oh and Yoon, {Hyong Seo} and Kim, {Sun Jun} and Park, {Jae Young} and Jeil Jung and {Chan Jun}, Seong",
year = "2019",
month = "1",
day = "1",
doi = "10.1109/TNANO.2018.2878473",
language = "English",
volume = "18",
pages = "55--61",
journal = "IEEE Transactions on Nanotechnology",
issn = "1536-125X",
publisher = "Institute of Electrical and Electronics Engineers Inc.",

}

Impedance variation on lattice misoriented few-layer graphene via layer decoupling. / Kim, Whan Kyun; Oh, Juyeong; Yoon, Hyong Seo; Kim, Sun Jun; Park, Jae Young; Jung, Jeil; Chan Jun, Seong.

In: IEEE Transactions on Nanotechnology, Vol. 18, 8532140, 01.01.2019, p. 55-61.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Impedance variation on lattice misoriented few-layer graphene via layer decoupling

AU - Kim, Whan Kyun

AU - Oh, Juyeong

AU - Yoon, Hyong Seo

AU - Kim, Sun Jun

AU - Park, Jae Young

AU - Jung, Jeil

AU - Chan Jun, Seong

PY - 2019/1/1

Y1 - 2019/1/1

N2 - We demonstrate radio frequency (RF) transmission characteristics in a layer stacked manner. Generally, as the number of graphene layers increases, the impedance is reduced and the transmission efficiency of monolayer graphene becomes better than that of chemically synthesized monolayer graphene. Depending on the stacking method, graphene may or may not be well aligned between layers; however, this characteristic affects the RF transmission. Graphene extracted from graphite is well aligned with other layers; however, synthesized graphene is randomly stacked because it is transferred and the layers are not aligned. Scattering parameters and the measured impedance shows that graphene extracted from graphite exhibits better transmission characteristics in the case of single-layer graphene, whereas synthesized graphene shows better transmission characteristics in the case of multiple-layer graphene. We calculated the change in conductivity based on the matched angle between layers of graphene and found that the conductivity was higher when the matching was less, compared to when it was well-matched. These results are also reflected in the impedance extracted from the scattering parameters. It was found that different impedance patterns are formed in single-layer graphene and in multiple layers for multi-layer graphene with stacking methods. This is because the layers are decoupled when they are randomly stacked.

AB - We demonstrate radio frequency (RF) transmission characteristics in a layer stacked manner. Generally, as the number of graphene layers increases, the impedance is reduced and the transmission efficiency of monolayer graphene becomes better than that of chemically synthesized monolayer graphene. Depending on the stacking method, graphene may or may not be well aligned between layers; however, this characteristic affects the RF transmission. Graphene extracted from graphite is well aligned with other layers; however, synthesized graphene is randomly stacked because it is transferred and the layers are not aligned. Scattering parameters and the measured impedance shows that graphene extracted from graphite exhibits better transmission characteristics in the case of single-layer graphene, whereas synthesized graphene shows better transmission characteristics in the case of multiple-layer graphene. We calculated the change in conductivity based on the matched angle between layers of graphene and found that the conductivity was higher when the matching was less, compared to when it was well-matched. These results are also reflected in the impedance extracted from the scattering parameters. It was found that different impedance patterns are formed in single-layer graphene and in multiple layers for multi-layer graphene with stacking methods. This is because the layers are decoupled when they are randomly stacked.

UR - http://www.scopus.com/inward/record.url?scp=85056357102&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85056357102&partnerID=8YFLogxK

U2 - 10.1109/TNANO.2018.2878473

DO - 10.1109/TNANO.2018.2878473

M3 - Article

AN - SCOPUS:85056357102

VL - 18

SP - 55

EP - 61

JO - IEEE Transactions on Nanotechnology

JF - IEEE Transactions on Nanotechnology

SN - 1536-125X

M1 - 8532140

ER -