m thickness. Since CNHs have a unique arrangement of aggregates (dahlia structure), the composite is homogeneous, as verified by transmission electron microscopy (TEM) and, scanning electron microscopy (SEM), and other functional properties investigated by Raman spectroscopy, Fourier transform infrared spectroscopy (FT-IR), conductivity measurement, tensile strength measurement, and skin sensitization.
Conclusion
It can be concluded that cellulose and CNHs sheets are conductive and compatible to human skin applications.
en-copyright=
kn-copyright=
en-aut-name=SelvamKarthik Paneer
en-aut-sei=Selvam
en-aut-mei=Karthik Paneer
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=1
ORCID=
en-aut-name=NagahataTaichi
en-aut-sei=Nagahata
en-aut-mei=Taichi
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=2
ORCID=
en-aut-name=KatoKosuke
en-aut-sei=Kato
en-aut-mei=Kosuke
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=3
ORCID=
en-aut-name=KoreishiMayuko
en-aut-sei=Koreishi
en-aut-mei=Mayuko
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=4
ORCID=
en-aut-name=NakamuraToshiyuki
en-aut-sei=Nakamura
en-aut-mei=Toshiyuki
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=5
ORCID=
en-aut-name=NakamuraYoshimasa
en-aut-sei=Nakamura
en-aut-mei=Yoshimasa
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=6
ORCID=
en-aut-name=NishikawaTakeshi
en-aut-sei=Nishikawa
en-aut-mei=Takeshi
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=7
ORCID=
en-aut-name=SatohAyano
en-aut-sei=Satoh
en-aut-mei=Ayano
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=8
ORCID=
en-aut-name=HayashiYasuhiko
en-aut-sei=Hayashi
en-aut-mei=Yasuhiko
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=9
ORCID=
affil-num=1
en-affil=Graduate School of Natural Science and Technology, Okayama University
kn-affil=
affil-num=2
en-affil=Graduate School of Interdisciplinary Science and Engineering in Health Systems, Okayama University
kn-affil=
affil-num=3
en-affil=Graduate School of Interdisciplinary Science and Engineering in Health Systems, Okayama University
kn-affil=
affil-num=4
en-affil=Graduate School of Interdisciplinary Science and Engineering in Health Systems, Okayama University
kn-affil=
affil-num=5
en-affil=Graduate School of Environmental and Life Science, Okayama University
kn-affil=
affil-num=6
en-affil=Graduate School of Environmental and Life Science, Okayama University
kn-affil=
affil-num=7
en-affil=Graduate School of Natural Science and Technology, Okayama University
kn-affil=
affil-num=8
en-affil=Graduate School of Interdisciplinary Science and Engineering in Health Systems, Okayama University
kn-affil=
affil-num=9
en-affil=Graduate School of Natural Science and Technology, Okayama University
kn-affil=
en-keyword=Carbon Nanohorns
kn-keyword=Carbon Nanohorns
en-keyword=Cellulose
kn-keyword=Cellulose
en-keyword=Skin sensitization
kn-keyword=Skin sensitization
en-keyword=Composites
kn-keyword=Composites
en-keyword=Bio-compatible
kn-keyword=Bio-compatible
END
start-ver=1.4
cd-journal=joma
no-vol=7
cd-vols=
no-issue=5
article-no=
start-page=056402
end-page=
dt-received=
dt-revised=
dt-accepted=
dt-pub-year=2020
dt-pub=20200504
dt-online=
en-article=
kn-article=
en-subject=
kn-subject=
en-title=
kn-title=Synthesis of solvent-free conductive and flexible cellulose-carbon nanohorn sheets and their application as a water vapor sensor
en-subtitle=
kn-subtitle=
en-abstract=
kn-abstract=Carbon nanohorns (CNHs) are mixed with cellulose to make freestanding thin-film conductive sheets. CNHs, at different ratios (5, 10, 25, 50 wt%), form composites with cellulose (hydroxyethylcellulose). Freestanding cellulose-carbon nanohorn (CCN) sheets were fabricated using a 100 mu m-thick metal bar coater. Surfactants or any other chemical treatments to tailor the surface properties of CNHs were avoided to obtain composite sheets from pristine CNHs and cellulose. Utilizing the hygroscopic property of hydroxyethylcellulose and the electrical conductivity of CNHs paved a path to perform this experiment. The synthesis technique is simple, and the fabrication and drying of the sheets were effortless. As the loading concentration of CNH increased, the resistance, flexibility, and strength of the CCN composite sheets decreased. The maximum loading concentration possible to obtain a freestanding CCN sheet is 50 wt%. The resistance of the maximum loading concentration of CNH was 53 k omega. The response of the CCN sheets to water vapor was 4 s and recover time was 13 s, and it is feasible to obtain a response for different concentrations of water vapor. High-resolution transmission electron microscopy, scanning electron microscopy, Fourier transform infrared spectroscopy, Raman spectroscopy, resistance measurement, tensile strength measurement, and thermogravimetric analysis were used to investigate the mechanical, morphological, electrical, and chemical properties of the CCN sheets.
en-copyright=
kn-copyright=
en-aut-name=Paneer SelvamKarthik
en-aut-sei=Paneer Selvam
en-aut-mei=Karthik
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=1
ORCID=
en-aut-name=NakagawaTomohiro
en-aut-sei=Nakagawa
en-aut-mei=Tomohiro
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=2
ORCID=
en-aut-name=MaruiTatsuki
en-aut-sei=Marui
en-aut-mei=Tatsuki
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=3
ORCID=
en-aut-name=InoueHirotaka
en-aut-sei=Inoue
en-aut-mei=Hirotaka
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=4
ORCID=
en-aut-name=NishikawaTakeshi
en-aut-sei=Nishikawa
en-aut-mei=Takeshi
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=5
ORCID=
en-aut-name=HayashiYasuhiko
en-aut-sei=Hayashi
en-aut-mei=Yasuhiko
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=6
ORCID=
affil-num=1
en-affil=Graduate School of Natural Science and Technology, Okayama University
kn-affil=
affil-num=2
en-affil=Graduate School of Natural Science and Technology, Okayama University
kn-affil=
affil-num=3
en-affil=Graduate School of Natural Science and Technology, Okayama University
kn-affil=
affil-num=4
en-affil=Graduate School of Natural Science and Technology, Okayama University
kn-affil=
affil-num=5
en-affil=Graduate School of Natural Science and Technology, Okayama University
kn-affil=
affil-num=6
en-affil=Graduate School of Natural Science and Technology, Okayama University
kn-affil=
en-keyword=carbon nanohorns
kn-keyword=carbon nanohorns
en-keyword=cellulose
kn-keyword=cellulose
en-keyword=conductive sheets
kn-keyword=conductive sheets
en-keyword=vapor sensor
kn-keyword=vapor sensor
END
start-ver=1.4
cd-journal=joma
no-vol=10
cd-vols=
no-issue=1
article-no=
start-page=7307
end-page=
dt-received=
dt-revised=
dt-accepted=
dt-pub-year=2020
dt-pub=20200429
dt-online=
en-article=
kn-article=
en-subject=
kn-subject=
en-title=
kn-title=Controlling Electronic States of Few-walled Carbon Nanotube Yarn via Joule-annealing and p-type Doping Towards Large Thermoelectric Power Factor
en-subtitle=
kn-subtitle=
en-abstract=
kn-abstract=Flexible, light-weight and robust thermoelectric (TE) materials have attracted much attention to convert waste heat from low-grade heat sources, such as human body, to electricity. Carbon nanotube (CNT) yarn is one of the potential TE materials owing to its narrow band-gap energy, high charge carrier mobility, and excellent mechanical property, which is conducive for flexible and wearable devices. Herein, we propose a way to improve the power factor of CNT yarns fabricated from few-walled carbon nanotubes (FWCNTs) by two-step method; Joule-annealing in the vacuum followed by doping with p-type dopants, 2,3,5,6-tetrafluo-7,7,8,8-tetracyanoquinodimethane (F4TCNQ). Numerical calculations and experimental results explain that Joule-annealing and doping modulate the electronic states (Fermi energy level) of FWCNTs, resulting in extremely large thermoelectric power factor of 2250 mu Wm(-1) K-2 at a measurement temperature of 423K. Joule-annealing removes amorphous carbon on the surface of the CNT yarn, which facilitates doping in the subsequent step, and leads to higher Seebeck coefficient due to the transformation from (semi) metallic to semiconductor behavior. Doping also significantly increases the electrical conductivity due to the effective charge transfers between CNT yarn and F4TCNQ upon the removal of amorphous carbon after Joule-annealing.
en-copyright=
kn-copyright=
en-aut-name=MyintMay Thu Zar
en-aut-sei=Myint
en-aut-mei=May Thu Zar
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=1
ORCID=
en-aut-name=NishikawaTakeshi
en-aut-sei=Nishikawa
en-aut-mei=Takeshi
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=2
ORCID=
en-aut-name=OmotoKazuki
en-aut-sei=Omoto
en-aut-mei=Kazuki
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=3
ORCID=
en-aut-name=InoueHirotaka
en-aut-sei=Inoue
en-aut-mei=Hirotaka
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=4
ORCID=
en-aut-name=YamashitaYoshifumi
en-aut-sei=Yamashita
en-aut-mei=Yoshifumi
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=5
ORCID=
en-aut-name=KyawAung Ko Ko
en-aut-sei=Kyaw
en-aut-mei=Aung Ko Ko
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=6
ORCID=
en-aut-name=HayashiYasuhiko
en-aut-sei=Hayashi
en-aut-mei=Yasuhiko
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=7
ORCID=
affil-num=1
en-affil=Graduate School of Natural Science and Technology, Okayama University
kn-affil=
affil-num=2
en-affil=Graduate School of Natural Science and Technology, Okayama University
kn-affil=
affil-num=3
en-affil=Graduate School of Natural Science and Technology, Okayama University
kn-affil=
affil-num=4
en-affil=Graduate School of Natural Science and Technology, Okayama University
kn-affil=
affil-num=5
en-affil=Graduate School of Natural Science and Technology, Okayama University
kn-affil=
affil-num=6
en-affil=Department of Electrical and Electronic Engineering, Southern University of Science and Technology
kn-affil=
affil-num=7
en-affil=Graduate School of Natural Science and Technology, Okayama University
kn-affil=
en-keyword=Materials science
kn-keyword=Materials science
en-keyword=Nanoscience and technology
kn-keyword=Nanoscience and technology
END
start-ver=1.4
cd-journal=joma
no-vol=95
cd-vols=
no-issue=23
article-no=
start-page=
end-page=
dt-received=
dt-revised=
dt-accepted=
dt-pub-year=2005
dt-pub=200511
dt-online=
en-article=
kn-article=
en-subject=
kn-subject=
en-title=
kn-title=Opacity effect on extreme ultraviolet radiation from laser-produced tin plasmas
en-subtitle=
kn-subtitle=
en-abstract=
kn-abstract=Opacity effects on extreme ultraviolet (EUV) emission from laser-produced tin (Sn) plasma have been experimentally investigated. An absorption spectrum of a uniform Sn plasma generated by thermal x rays has been measured in the EUV range (9-19 nm wavelength) for the first time. Experimental results indicate that control of the optical depth of the laser-produced Sn plasma is essential for obtaining high conversion to 13.5 nm-wavelength EUV radiation; 1.8% of the conversion efficiency was attained with the use of 2.2 ns laser pulses.
en-copyright=
kn-copyright=
en-aut-name=FujiokaShinsuke
en-aut-sei=Fujioka
en-aut-mei=Shinsuke
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=1
ORCID=
en-aut-name=NishimuraHiroaki
en-aut-sei=Nishimura
en-aut-mei=Hiroaki
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=2
ORCID=
en-aut-name=NishiharaKatsunobu
en-aut-sei=Nishihara
en-aut-mei=Katsunobu
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=3
ORCID=
en-aut-name=SasakiAkira
en-aut-sei=Sasaki
en-aut-mei=Akira
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=4
ORCID=
en-aut-name=SunaharaAtsushi
en-aut-sei=Sunahara
en-aut-mei=Atsushi
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=5
ORCID=
en-aut-name=OkunoTomoharu
en-aut-sei=Okuno
en-aut-mei=Tomoharu
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=6
ORCID=
en-aut-name=UedaNobuyoshi
en-aut-sei=Ueda
en-aut-mei=Nobuyoshi
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=7
ORCID=
en-aut-name=AndoTsuyoshi
en-aut-sei=Ando
en-aut-mei=Tsuyoshi
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=8
ORCID=
en-aut-name=TaoYezheng
en-aut-sei=Tao
en-aut-mei=Yezheng
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=9
ORCID=
en-aut-name=ShimadaYoshinori
en-aut-sei=Shimada
en-aut-mei=Yoshinori
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=10
ORCID=
en-aut-name=HashimotoKazuhisa
en-aut-sei=Hashimoto
en-aut-mei=Kazuhisa
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=11
ORCID=
en-aut-name=YamauraMichiteru
en-aut-sei=Yamaura
en-aut-mei=Michiteru
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=12
ORCID=
en-aut-name=ShigemoriKeisuke
en-aut-sei=Shigemori
en-aut-mei=Keisuke
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=13
ORCID=
en-aut-name=NakaiMitsuo
en-aut-sei=Nakai
en-aut-mei=Mitsuo
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=14
ORCID=
en-aut-name=NagaiKeiji
en-aut-sei=Nagai
en-aut-mei=Keiji
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=15
ORCID=
en-aut-name=NorimatsuTakayoshi
en-aut-sei=Norimatsu
en-aut-mei=Takayoshi
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=16
ORCID=
en-aut-name=NishikawaTakeshi
en-aut-sei=Nishikawa
en-aut-mei=Takeshi
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=17
ORCID=
en-aut-name=MiyanagaNoriaki
en-aut-sei=Miyanaga
en-aut-mei=Noriaki
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=18
ORCID=
en-aut-name=IzawaYasukazu
en-aut-sei=Izawa
en-aut-mei=Yasukazu
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=19
ORCID=
en-aut-name=MimaKunioki
en-aut-sei=Mima
en-aut-mei=Kunioki
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=20
ORCID=
affil-num=1
en-affil=
kn-affil=Osaka University
affil-num=2
en-affil=
kn-affil=Osaka University
affil-num=3
en-affil=
kn-affil=Osaka University
affil-num=4
en-affil=
kn-affil=Advanced Photon Research Center
affil-num=5
en-affil=
kn-affil=Institute for Laser Technology
affil-num=6
en-affil=
kn-affil=Osaka University
affil-num=7
en-affil=
kn-affil=Osaka University
affil-num=8
en-affil=
kn-affil=Osaka University
affil-num=9
en-affil=
kn-affil=Osaka University
affil-num=10
en-affil=
kn-affil=Institute for Laser Technology
affil-num=11
en-affil=
kn-affil=Institute for Laser Technology
affil-num=12
en-affil=
kn-affil=Institute for Laser Technology
affil-num=13
en-affil=
kn-affil=Osaka University
affil-num=14
en-affil=
kn-affil=Osaka University
affil-num=15
en-affil=
kn-affil=Osaka University
affil-num=16
en-affil=
kn-affil=Osaka University
affil-num=17
en-affil=
kn-affil=Okayama University
affil-num=18
en-affil=
kn-affil=Osaka University
affil-num=19
en-affil=
kn-affil=Osaka University
affil-num=20
en-affil=
kn-affil=Osaka University
en-keyword=emission
kn-keyword=emission
en-keyword=targets
kn-keyword=targets
en-keyword=lithography
kn-keyword=lithography
en-keyword=fusion
kn-keyword=fusion
END