Sang Bok Lee

Dr. Sang Bok Lee


Research Focus & Metrics

Academic Career Length

15Years (2012-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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8 January 2020 in RSC Advances
Verified
Journal Article
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PDF file
KRKanthasamy Raagulan
Kanthasamy Raagulan
RBRamanaskanda Braveenth
Ramanaskanda Braveenth
BKBo Mi Kim
Bo Mi Kim
KLKwang Jin Lim
Kwang Jin Lim
SLSang Bok Lee
Sang Bok Lee
KRKanthasamy Raagulan
Kanthasamy Raagulan
MXene and conductive polymers are attractive candidates for electromagnetic interference shielding (EMI) applications. The MXene–PAT-conductive polymer (CP) composites were fabricated by a cost-effective spray coating technique and characterized using X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM), X-ray diffraction (XRD) and Raman spectroscopy. A new approach has been developed for the synthesis of exfoliated MXene. The MXene–PAT–poly(p-aminophenol)–polyaniline co-polymer composite exhibited good electric conductivity (EC) of 7.813 S cm−1. The composites revealed an excellent thermal properties, which were 0.687 W (m K)−1 thermal conductivity, 2.247 J (g K)−1 heat capacity, 0.282 mm2 s−1 thermal diffusivity and 1.330 W s1/2 m−2 K−1 thermal effusivity. The composites showed 99.99% shielding efficiency and the MXene–PAT–PANI–PpAP composite (MXPATPA) had EMI shielding effectiveness of 45.18 dB at 8.2 GHz. The reduced form of MXene (r-Ti3C2Tx) increased the shielding effectiveness (SE) by 7.26% and the absorption (SEA) was greatly enhanced by the ant farm like structure. The composites possess excellent thermal and EMI SE characteristics, thus can be applied in areas, such as mobile phones, military utensils, heat-emitting electronic devices, automobiles and radars.

1 May 2017 in Chemistry of Materials
Verified
Journal Article
Closed access
YKYoungdo Kim
Youngdo Kim
SKSuk Jin Kwon
Suk Jin Kwon
HJHye-Kyeong Jang
Hye-Kyeong Jang
BJByung Mun Jung
Byung Mun Jung
SLSang Bok Lee
Sang Bok Lee
UCU Hyeok Choi
U Hyeok Choi

24 January 2022 in Journal of Materials Chemistry A
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Journal Article
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SRSeung Han Ryu
Seung Han Ryu
BPByeongjin Park
Byeongjin Park
YHYou Kyung Han
You Kyung Han
SKSuk Jin Kwon
Suk Jin Kwon
TKTaehoon Kim
Taehoon Kim
SLSang Bok Lee
Sang Bok Lee
A 5G EMI shielding composite flexible film with near-zero reflection is proposed with remarkably low reflection with thin thickness compared to the previous studies. The resonant frequency can be controlled via tailored design factors of the film.

6 December 2018 in Macromolecules
Verified
Journal Article
Closed access
SKSuk Jin Kwon
Suk Jin Kwon
BJByung Mun Jung
Byung Mun Jung
TKTaehoon Kim
Taehoon Kim
JBJinho Byun
Jinho Byun
JLJaekwang Lee
Jaekwang Lee
UCU Hyeok Choi
U Hyeok Choi

2 April 2019 in Nanomaterials
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Journal Article
Open access
PDF file
KRKanthasamy Raagulan
Kanthasamy Raagulan
RBRamanaskanda Braveenth
Ramanaskanda Braveenth
LLLee Ro Lee
Lee Ro Lee
JLJoonsik Lee
Joonsik Lee
BKBo Mi Kim
Bo Mi Kim
KRKanthasamy Raagulan
Kanthasamy Raagulan
MXenes, carbon nanotubes, and nanoparticles are attractive candidates for electromagnetic interference (EMI) shielding. The composites were prepared through a filtration technique and spray coating process. The functionalization of non-woven carbon fabric is an attractive strategy. The prepared composite was characterized using X-ray photoelectron spectroscopy (XPS), X-ray diffraction (XRD), scanning electron microscope (SEM), energy-dispersive X-ray spectroscopy (EDX), and Raman spectroscopy. The MXene-oxidized carbon nanotube-sodium dodecyl sulfate composite (MXCS) exhibited 50.5 dB (99.999%), and the whole nanoparticle-based composite blocked 99.99% of the electromagnetic radiation. The functionalization increased the shielding by 15.4%. The composite possessed good thermal stability, and the maximum electric conductivity achieved was 12.5 Scm−1. Thus, the composite shows excellent potential applications towards the areas such as aeronautics, mobile phones, radars, and military.

15 January 2018 in Macromolecular Chemistry and Physics
Verified
Journal Article
Closed access
PDF file
HJHye Kyeong Jang
Hye Kyeong Jang
BJByung Mun Jung
Byung Mun Jung
UCU Hyeok Choi
U Hyeok Choi
SLSang Bok Lee
Sang Bok Lee