start-ver=1.4
cd-journal=joma
no-vol=
cd-vols=
no-issue=
article-no=
start-page=26021
end-page=26028
dt-received=
dt-revised=
dt-accepted=
dt-pub-year=2022
dt-pub=20220722
dt-online=
en-article=
kn-article=
en-subject=
kn-subject=
en-title=
kn-title=Characteristics of Vertical Ga2O3 Schottky Junctions with the Interfacial Hexagonal Boron Nitride Film
en-subtitle=
kn-subtitle=
en-abstract=
kn-abstract=We present the device properties of a nickel (Ni)- gallium oxide (Ga2O3) Schottky junction with an interfacial hexagonal boron nitride (hBN) layer. A vertical Schottky junction with the configuration Ni/hBN/Ga2O3/In was created using a chemical vapor-deposited hBN film on a Ga(2)O(3 )substrate. The current-voltage characteristics of the Schottky junction were investigated with and without the hBN interfacial layer. We observed that the turn-on voltage for the forward current of the Schottky junction was significantly enhanced with the hBN interfacial film. Furthermore, the Schottky junction was analyzed under the illumination of deep ultraviolet light (254 nm), obtaining a photoresponsivity of 95.11 mA/W under an applied bias voltage (-7.2 V). The hBN interfacial layer for the Ga2O3-based Schottky junction can serve as a barrier layer to control the turn-on voltage and optimize the device properties for deep-UV photosensor applications. Furthermore, the demonstrated vertical heterojunction with an hBN layer has the potential to be significant for temperature management at the junction interface to develop reliable Ga2O3-based Schottky junction devices.
en-copyright=
kn-copyright=
en-aut-name=RamaVenkata Krishna Rao
en-aut-sei=Rama
en-aut-mei=Venkata Krishna Rao
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=1
ORCID=
en-aut-name=RanadeAjinkya K.
en-aut-sei=Ranade
en-aut-mei=Ajinkya K.
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=2
ORCID=
en-aut-name=DesaiPradeep
en-aut-sei=Desai
en-aut-mei=Pradeep
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=3
ORCID=
en-aut-name=TodankarBhagyashri
en-aut-sei=Todankar
en-aut-mei=Bhagyashri
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=4
ORCID=
en-aut-name=KalitaGolap
en-aut-sei=Kalita
en-aut-mei=Golap
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=5
ORCID=
en-aut-name=SuzukiHiroo
en-aut-sei=Suzuki
en-aut-mei=Hiroo
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=6
ORCID=
en-aut-name=TanemuraMasaki
en-aut-sei=Tanemura
en-aut-mei=Masaki
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=7
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=8
ORCID=
affil-num=1
en-affil=Graduate School of Natural Science and Technology, Okayama University
kn-affil=
affil-num=2
en-affil=Department of Physical Science and Engineering, Nagoya Institute of Technology
kn-affil=
affil-num=3
en-affil=Department of Physical Science and Engineering, Nagoya Institute of Technology
kn-affil=
affil-num=4
en-affil=Department of Physical Science and Engineering, Nagoya Institute of Technology
kn-affil=
affil-num=5
en-affil=Department of Physical Science and Engineering, Nagoya Institute of Technology
kn-affil=
affil-num=6
en-affil=Graduate School of Natural Science and Technology
kn-affil=
affil-num=7
en-affil=Department of Physical Science and Engineering, Nagoya Institute of Technology
kn-affil=
affil-num=8
en-affil=
kn-affil=
END
start-ver=1.4
cd-journal=joma
no-vol=24
cd-vols=
no-issue=1
article-no=
start-page=18
end-page=
dt-received=
dt-revised=
dt-accepted=
dt-pub-year=2021
dt-pub=20211023
dt-online=
en-article=
kn-article=
en-subject=
kn-subject=
en-title=
kn-title=Synthesis and characterization of conductive flexible cellulose carbon nanohorn sheets for human tissue applications
en-subtitle=
kn-subtitle=
en-abstract=
kn-abstract=Background
Conductive sheets of cellulose and carbon nanomaterials and its human skin applications are an interesting research aspect as they have potential for applications for skin compatibility. Hence it is needed to explore the effects and shed light on these applications.
Method
To fabricate wearable, portable, flexible, lightweight, inexpensive, and biocompatible composite materials, carbon nanohorns (CNHs) and hydroxyethylcellulose (HEC) were used as precursors to prepare CNH-HEC (Cnh-cel) composite sheets. Cnh-cel sheets were prepared with different loading concentrations of CNHs (10, 20 50,100mg) in 200mg cellulose. To fabricate the bio-compatible sheets, a pristine composite of CNHs and HEC was prepared without any pretreatment of the materials.
Results
The obtained sheets possess a conductivity of 1.83x10(-10)S/m and bio-compatible with human skin. Analysis for skin-compatibility was performed for Cnh-cel sheets by h-CLAT in vitro skin sensitization tests to evaluate the activation of THP-1 cells. It was found that THP-1 cells were not activated by Cnh-cel; hence Cnh-cel is a safe biomaterial for human skin. It was also found that the composite allowed only a maximum loading of 100mg to retain the consistent geometry of free-standing sheets of <100m 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=117
cd-vols=
no-issue=10
article-no=
start-page=101103
end-page=
dt-received=
dt-revised=
dt-accepted=
dt-pub-year=2020
dt-pub=20200909
dt-online=
en-article=
kn-article=
en-subject=
kn-subject=
en-title=
kn-title=Super-chiral vibrational spectroscopy with metasurfaces for high-sensitive identification of alanine enantiomers
en-subtitle=
kn-subtitle=
en-abstract=
kn-abstract=Chiral nature of an enantiomer can be characterized by circular dichroism (CD) spectroscopy, but such a technique usually suffers from weak signal even with a sophisticated optical instrument. Recent demonstrations of plasmonic metasurfaces showed that chiroptical interaction of molecules can be engineered, thereby greatly simplifying a measurement system with high sensing capability. Here, by exploiting super-chiral field in a metasurface, we experimentally demonstrate high-sensitive vibrational CD spectroscopy of alanine enantiomers, the smallest chiral amino acid. Under linearly polarized excitation, the metasurface consisting of an array of staggered Au nano-rods selectively produces the left- and right-handed super-chiral fields at 1600?cm?1, which spectrally overlaps with the functional group vibrations of alanine. In the Fourier-transform infrared spectrometer measurements, the mirror symmetric CD spectra of D- and L-alanine are clearly observed depending on the handedness of the metasurface, realizing the reliable identification of small chiral molecules. The corresponding numerical simulations reveal the underlying resonant chiroptical interaction of plasmonic modes of the metasurface and vibrational modes of alanine. Our approach demonstrates a high-sensitive vibrational CD spectroscopic technique, opening up a reliable chiral sensing platform for advanced infrared inspection technologies.
en-copyright=
kn-copyright=
en-aut-name=IidaTakumi
en-aut-sei=Iida
en-aut-mei=Takumi
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=1
ORCID=
en-aut-name=IshikawaAtsushi
en-aut-sei=Ishikawa
en-aut-mei=Atsushi
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=2
ORCID=
en-aut-name=TanakaTakuo
en-aut-sei=Tanaka
en-aut-mei=Takuo
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=3
ORCID=
en-aut-name=MuranakaAtsuya
en-aut-sei=Muranaka
en-aut-mei=Atsuya
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=4
ORCID=
en-aut-name=UchiyamaMasanobu
en-aut-sei=Uchiyama
en-aut-mei=Masanobu
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=
en-aut-name=TsurutaKenji
en-aut-sei=Tsuruta
en-aut-mei=Kenji
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=7
ORCID=
affil-num=1
en-affil=Department of Electrical and Electronic Engineering, Okayama University
kn-affil=
affil-num=2
en-affil=Department of Electrical and Electronic Engineering, Okayama University
kn-affil=
affil-num=3
en-affil=Metamaterials Laboratory, RIKEN Cluster for Pioneering Research
kn-affil=
affil-num=4
en-affil=Advanced Elements Chemistry Laboratory, RIKEN Cluster for Pioneering Research
kn-affil=
affil-num=5
en-affil=Advanced Elements Chemistry Laboratory, RIKEN Cluster for Pioneering Research
kn-affil=
affil-num=6
en-affil=Department of Electrical and Electronic Engineering, Okayama University
kn-affil=
affil-num=7
en-affil=Department of Electrical and Electronic Engineering, Okayama University
kn-affil=
END
start-ver=1.4
cd-journal=joma
no-vol=10
cd-vols=
no-issue=1
article-no=
start-page=6486
end-page=
dt-received=
dt-revised=
dt-accepted=
dt-pub-year=2020
dt-pub=20200416
dt-online=
en-article=
kn-article=
en-subject=
kn-subject=
en-title=
kn-title=Whitish daytime radiative cooling using diffuse reflection of non-resonant silica nanoshells
en-subtitle=
kn-subtitle=
en-abstract=
kn-abstract=Daytime radiative cooling offers efficient passive cooling of objects by tailoring their spectral responses, holding great promise for green photonics applications. A specular reflector has been utilized in cooling devices to minimize sunlight absorption, but such a glaring surface is visually less appealing, thus undesirable for public use. Here, by exploiting strong diffuse reflection of silica nanoshells in a polymer matrix, daytime radiative cooling below the ambient temperature is experimentally demonstrated, while showing whitish color under sunlight. The cooling device consists of a poly(methyl methacrylate) layer with randomly distributed silica nanoshells and a polydimethylsiloxane (PDMS) layer on an Ag mirror. The non-resonant nanoshells exhibit uniform diffuse reflection over the solar spectrum, while fully transparent for a selective thermal radiation from the underneath PDMS layer. In the temperature measurement under the sunlight irradiation, the device shows 2.3 degrees C cooler than the ambient, which is comparable to or even better than the conventional device without the nanoshells. Our approach provides a simple yet powerful nanophotonic structure for realizing a scalable and practical daytime radiative cooling device without a glaring reflective surface.
en-copyright=
kn-copyright=
en-aut-name=SuichiTakahiro
en-aut-sei=Suichi
en-aut-mei=Takahiro
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=1
ORCID=
en-aut-name=IshikawaAtsushi
en-aut-sei=Ishikawa
en-aut-mei=Atsushi
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=2
ORCID=
en-aut-name=TanakaTakuo
en-aut-sei=Tanaka
en-aut-mei=Takuo
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=3
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=4
ORCID=
en-aut-name=TsurutaKenji
en-aut-sei=Tsuruta
en-aut-mei=Kenji
kn-aut-name=Œ’“ñ
kn-aut-sei=
kn-aut-mei=Œ’“ñ
aut-affil-num=5
ORCID=
affil-num=1
en-affil=Department of Electrical and Electronic Engineering, Okayama University
kn-affil=
affil-num=2
en-affil=Department of Electrical and Electronic Engineering, Okayama University
kn-affil=
affil-num=3
en-affil=Metamaterials Laboratory, RIKEN Cluster for Pioneering Research
kn-affil=
affil-num=4
en-affil=Department of Electrical and Electronic Engineering, Okayama University
kn-affil=
affil-num=5
en-affil=Department of Electrical and Electronic Engineering, Okayama University
kn-affil=
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=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=25
cd-vols=
no-issue=5
article-no=
start-page=1144
end-page=
dt-received=
dt-revised=
dt-accepted=
dt-pub-year=2020
dt-pub=20200304
dt-online=
en-article=
kn-article=
en-subject=
kn-subject=
en-title=
kn-title=Systematic Investigations of Annealing and Functionalization of Carbon Nanotube Yarns
en-subtitle=
kn-subtitle=
en-abstract=
kn-abstract=Carbon nanotube yarns (CNY) are a novel carbonaceous material and have received a great deal of interest since the beginning of the 21st century. CNY are of particular interest due to their useful heat conducting, electrical conducting, and mechanical properties. The electrical conductivity of carbon nanotube yarns can also be influenced by functionalization and annealing. A systematical study of this post synthetic treatment will assist in understanding what factors influences the conductivity of these materials. In this investigation, it is shown that the electrical conductivity can be increased by a factor of 2 and 5.5 through functionalization with acids and high temperature annealing respectively. The scale of the enhancement is dependent on the reducing of intertube space in case of functionalization. For annealing, not only is the highly graphitic structure of the carbon nanotubes (CNT) important, but it is also shown to influence the residual amorphous carbon in the structure. The promising results of this study can help to utilize CNY as a replacement for common materials in the field of electrical wiring.
en-copyright=
kn-copyright=
en-aut-name=ScholzMaik
en-aut-sei=Scholz
en-aut-mei=Maik
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=1
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=2
ORCID=
en-aut-name=EckertVictoria
en-aut-sei=Eckert
en-aut-mei=Victoria
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=3
ORCID=
en-aut-name=KhavrusVyacheslav
en-aut-sei=Khavrus
en-aut-mei=Vyacheslav
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=4
ORCID=
en-aut-name=LeonhardtAlbrecht
en-aut-sei=Leonhardt
en-aut-mei=Albrecht
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=5
ORCID=
en-aut-name=B?chnerBernd
en-aut-sei=B?chner
en-aut-mei=Bernd
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=6
ORCID=
en-aut-name=MertigMichael
en-aut-sei=Mertig
en-aut-mei=Michael
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=7
ORCID=
en-aut-name=HampelSilke
en-aut-sei=Hampel
en-aut-mei=Silke
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=8
ORCID=
affil-num=1
en-affil=Leibniz Institute for Solid State and Material Research Dresden, Helmholtzstr. 20
kn-affil=
affil-num=2
en-affil=Graduate School of Natural Science and Technology, Okayama University
kn-affil=
affil-num=3
en-affil=Leibniz Institute for Solid State and Material Research Dresden, Helmholtzstr. 20
kn-affil=
affil-num=4
en-affil=Leibniz Institute for Solid State and Material Research Dresden, Helmholtzstr. 20
kn-affil=
affil-num=5
en-affil=Leibniz Institute for Solid State and Material Research Dresden, Helmholtzstr. 20
kn-affil=
affil-num=6
en-affil=Leibniz Institute for Solid State and Material Research Dresden, Helmholtzstr. 20
kn-affil=
affil-num=7
en-affil=Institute for Physical Chemistry, Technische Universit?t Dresden
kn-affil=
affil-num=8
en-affil=Leibniz Institute for Solid State and Material Research Dresden, Helmholtzstr. 20
kn-affil=
en-keyword=carbon nanotube yarns
kn-keyword=carbon nanotube yarns
en-keyword=carbon nanotube
kn-keyword=carbon nanotube
en-keyword=functionalization
kn-keyword=functionalization
en-keyword=electrical conductivity
kn-keyword=electrical conductivity
en-keyword=annealing
kn-keyword=annealing
en-keyword=acid treatment
kn-keyword=acid treatment
END
start-ver=1.4
cd-journal=joma
no-vol=10
cd-vols=
no-issue=
article-no=
start-page=4159
end-page=
dt-received=
dt-revised=
dt-accepted=
dt-pub-year=2019
dt-pub=20190913
dt-online=
en-article=
kn-article=
en-subject=
kn-subject=
en-title=
kn-title=Ultrafast isomerization-induced cooperative motions to higher molecular orientation in smectic liquid-crystalline azobenzene molecules
en-subtitle=
kn-subtitle=
en-abstract=
kn-abstract=The photoisomerization of molecules is widely used to control the structure of soft matter in
both natural and synthetic systems. However, the structural dynamics of the molecules
during isomerization and their subsequent response are difficult to elucidate due to their
complex and ultrafast nature. Herein, we describe the ultrafast formation of higherorientation
of liquid-crystalline (LC) azobenzene molecules via linearly polarized ultraviolet
light (UV) using ultrafast time-resolved electron diffraction. The ultrafast orientation is
caused by the trans-to-cis isomerization of the azobenzene molecules. Our observations are
consistent with simplified molecular dynamics calculations that revealed that the molecules
are aligned with the laser polarization axis by their cooperative motion after photoisomerization.
This insight advances the fundamental chemistry of photoresponsive molecules
in soft matter as well as their ultrafast photomechanical applications.
en-copyright=
kn-copyright=
en-aut-name=HadaMasaki
en-aut-sei=Hada
en-aut-mei=Masaki
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=1
ORCID=
en-aut-name=YamaguchiDaisuke
en-aut-sei=Yamaguchi
en-aut-mei=Daisuke
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=2
ORCID=
en-aut-name=IshikawaTadahiko
en-aut-sei=Ishikawa
en-aut-mei=Tadahiko
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=3
ORCID=
en-aut-name=SawaTakayoshi
en-aut-sei=Sawa
en-aut-mei=Takayoshi
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=4
ORCID=
en-aut-name=TsurutaKenji
en-aut-sei=Tsuruta
en-aut-mei=Kenji
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=5
ORCID=
en-aut-name=IshikawaKen
en-aut-sei=Ishikawa
en-aut-mei=Ken
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=6
ORCID=
en-aut-name=KoshiharaShin-Ya
en-aut-sei=Koshihara
en-aut-mei=Shin-Ya
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=7
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=8
ORCID=
en-aut-name=KatoTakashi
en-aut-sei=Kato
en-aut-mei=Takashi
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=Department of Chemistry & Biotechnology, School of Engineering, The University of Tokyo
kn-affil=
affil-num=3
en-affil=School of Science,Tokyo Institute of Technology
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=School of Materials and Chemical Technology, Tokyo Institute of Technology
kn-affil=
affil-num=7
en-affil=School of Science,Tokyo Institute of Technology
kn-affil=
affil-num=8
en-affil=Graduate School of Natural Science and Technology, Okayama University
kn-affil=
affil-num=9
en-affil=Department of Chemistry & Biotechnology, School of Engineering, The University of Tokyo
kn-affil=
END