Research Output 1982 2020

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2020

High output voltage generation of over 5 V from liquid motion on single-layer MoS2

Aji, A. S., Nishi, R., Ago, H. & Ohno, Y., Feb 2020, In : Nano Energy. 68, 104370.

Research output: Contribution to journalArticle

Open Access
Graphite
Electricity
Liquids
Electric potential
Graphene
2019

A novel graphene barrier against moisture by multiple stacking large-grain graphene

Gomasang, P., Kawahara, K., Yasuraoka, K., Maruyama, M., Ago, H., Okada, S. & Ueno, K., Dec 1 2019, In : Scientific reports. 9, 1, 3777.

Research output: Contribution to journalArticle

Open Access
Graphite
Humidity
Photoelectron Spectroscopy
Temperature
Raman Spectrum Analysis

Chemically Tuned p- and n-Type WSe2 Monolayers with High Carrier Mobility for Advanced Electronics

Ji, H. G., Solís-Fernández, P., Yoshimura, D., Maruyama, M., Endo, T., Miyata, Y., Okada, S. & Ago, H., Oct 1 2019, In : Advanced Materials. 31, 42, 1903613.

Research output: Contribution to journalArticle

Carrier mobility
Monolayers
Electronic equipment
Doping (additives)
Transition metals
1 Citation (Scopus)

Comparative design study for power reduction in organic optoelectronic pulse meter sensor

Elsamnah, F., Bilgaiyan, A., Affiq, M., Shim, C. H., Ishidai, H. & Hattori, R., Jun 1 2019, In : Biosensors. 9, 2, 48.

Research output: Contribution to journalArticle

Open Access
Organic light emitting diodes (OLED)
Photodiodes
Optoelectronic devices
Electric power utilization
Signal-To-Noise Ratio

Fabrication and characterization of asymmetric metal/Ge/metal diodes with Ge-on-insulator substrate

Maekrua, T., Goto, T., Nakae, K., Yamamoto, K., Nakashima, H. & Wang, D., Jan 1 2019, In : Japanese Journal of Applied Physics. 58, SB, SBBE05.

Research output: Contribution to journalArticle

Open Access
Electroluminescence
Diodes
diodes
insulators
Fabrication
2 Citations (Scopus)

Formation of environmentally stable hole-doped graphene films with instantaneous and high-density carrier doping via a boron-based oxidant

Kanahashi, K., Tanaka, N., Shoji, Y., Maruyama, M., Jeon, I., Kawahara, K., Ishihara, M., Hasegawa, M., Ohta, H., Ago, H., Matsuo, Y., Okada, S., Fukushima, T. & Takenobu, T., Dec 1 2019, In : npj 2D Materials and Applications. 3, 1, 7.

Research output: Contribution to journalArticle

Open Access
Boron
Graphite
Oxidants
Graphene
Carrier concentration
1 Citation (Scopus)

Fukuoka: Adapting to climate change through urban green space and the built environment?

Mabon, L., Kondo, K., Kanekiyo, H., Hayabuchi, Y. & Yamaguchi, A., Oct 2019, In : Cities. 93, p. 273-285 13 p.

Research output: Contribution to journalArticle

Open Access
climate change
greenspace
climate
local government
mitigation
Open Access
Field effect transistors
field effect transistors
insulators
space transportation system
Metals
4 Citations (Scopus)

Imaging of local structures affecting electrical transport properties of large graphene sheets by lock-in thermography

Nakajima, H., Morimoto, T., Okigawa, Y., Yamada, T., Ikuta, Y., Kawahara, K., Ago, H. & Okazaki, T., Feb 1 2019, In : Science Advances. 5, 2, eaau3407.

Research output: Contribution to journalArticle

Open Access
graphene
transport properties
defects
Joule heating
electrical resistance

Improved CPT system with less voltage stress and sensitivity using a step-down transformer on receiving side

Mostafa, T. M., Muharam, A., Hu, A. P. & Hattori, R., Aug 28 2019, In : IET Power Electronics. 12, 10, p. 2634-2641 8 p.

Research output: Contribution to journalArticle

Electric potential
High frequency transformers
Inductance
Tuning
Networks (circuits)
3 Citations (Scopus)

Polycrystalline thin-film transistors fabricated on high-mobility solid-phase-crystallized Ge on glass

Moto, K., Yamamoto, K., Imajo, T., Suemasu, T., Nakashima, H. & Toko, K., May 27 2019, In : Applied Physics Letters. 114, 21, 212107.

Research output: Contribution to journalArticle

Open Access
solid phases
transistors
glass
thin films
hole mobility

Reflectance-based organic pulse meter sensor for wireless monitoring of photoplethysmogram signal

Elsamnah, F., Bilgaiyan, A., Affiq, M., Shim, C. H., Ishidai, H. & Hattori, R., Sep 2019, In : Biosensors. 9, 3, 87.

Research output: Contribution to journalArticle

Open Access
Organic light emitting diodes (OLED)
Photodiodes
Electric power utilization
Equipment and Supplies
Monitoring

Synthesis of sub-millimeter single-crystal grains of aligned hexagonal boron nitride on an epitaxial Ni film

Taslim, A. B., Nakajima, H., Lin, Y. C., Uchida, Y., Kawahara, K., Okazaki, T., Suenaga, K., Hibino, H. & Ago, H., Aug 21 2019, In : Nanoscale. 11, 31, p. 14668-14675 8 p.

Research output: Contribution to journalArticle

Boron nitride
Single crystals
Chemical vapor deposition
Monolayers
Grain boundaries

Vapor Phase Selective Growth of Two-Dimensional Perovskite/WS2 Heterostructures for Optoelectronic Applications

Erklllç, U., Solís-Fernández, P., Ji, H. G., Shinokita, K., Lin, Y. C., Maruyama, M., Suenaga, K., Okada, S., Matsuda, K. & Ago, H., Jan 1 2019, In : ACS Applied Materials and Interfaces. 11, 43, p. 40503-40511 9 p.

Research output: Contribution to journalArticle

Optoelectronic devices
Perovskite
Heterojunctions
Vapors
Transition metals
3 Citations (Scopus)
Open Access
environmental policy
Japan
planning
community
research facility
2018
2 Citations (Scopus)

Acceleration of Photocarrier Relaxation in Graphene Achieved by Epitaxial Growth: Ultrafast Photoluminescence Decay of Monolayer Graphene on SiC

Imaeda, H., Koyama, T., Kishida, H., Kawahara, K., Ago, H., Sakakibara, R., Norimatsu, W., Terasawa, T. O., Bao, J. & Kusunoki, M., Aug 23 2018, In : Journal of Physical Chemistry C. 122, 33, p. 19273-19279 7 p.

Research output: Contribution to journalArticle

Graphite
Epitaxial growth
Graphene
Monolayers
Photoluminescence
1 Citation (Scopus)

Border trap evaluation for SiO2/GeO2/Ge gate stacks using deep-level transient spectroscopy

Wen, W. C., Yamamoto, K., Wang, D. & Nakashima, H., Nov 28 2018, In : Journal of Applied Physics. 124, 20, 205303.

Research output: Contribution to journalArticle

borders
metal oxide semiconductors
traps
capacitors
evaluation
3 Citations (Scopus)

Capacitive power transfer system with reduced voltage stress and sensitivity

Mostafa, T. M., Bui, D., Muharam, A., Hattori, R. & Hu, A. P., Jul 12 2018, In : Applied Sciences (Switzerland). 8, 7, 1131.

Research output: Contribution to journalArticle

converters
direct current
sensitivity
Electric potential
electric potential
14 Citations (Scopus)

Controlled Growth of Large-Area Uniform Multilayer Hexagonal Boron Nitride as an Effective 2D Substrate

Uchida, Y., Nakandakari, S., Kawahara, K., Yamasaki, S., Mitsuhara, M. & Ago, H., Jun 26 2018, In : ACS Nano. 12, 6, p. 6236-6244 9 p.

Research output: Contribution to journalArticle

Boron nitride
boron nitrides
Multilayers
Substrates
Chemical vapor deposition
7 Citations (Scopus)

Electrical properties of pseudo-single-crystalline Ge films grown by Au-induced layer exchange crystallization at 250 °c

Higashi, H., Kudo, K., Yamamoto, K., Yamada, S., Kanashima, T., Tsunoda, I., Nakashima, H. & Hamaya, K., Jun 7 2018, In : Journal of Applied Physics. 123, 21, 215704.

Research output: Contribution to journalArticle

electrical properties
crystallization
transistors
contamination
leakage
7 Citations (Scopus)

Enhanced Photocatalytic Degradation of Methyl Orange by Au/TiO2 Nanoparticles under Neutral and Acidic Solutions

Tsuji, M., Matsuda, K., Tanaka, M., Kuboyama, S., Uto, K., Wada, N., Kawazumi, H., Tsuji, T., Ago, H. & Hayashi, J. I., Feb 7 2018, In : ChemistrySelect. 3, 5, p. 1432-1438 7 p.

Research output: Contribution to journalArticle

Nanoparticles
Degradation
Photocatalysts
Carboxylation
Surface plasmon resonance
2 Citations (Scopus)

Grain Boundaries and Gas Barrier Property of Graphene Revealed by Dark-Field Optical Microscopy

Ding, D., Hibino, H. & Ago, H., Jan 11 2018, In : Journal of Physical Chemistry C. 122, 1, p. 902-910 9 p.

Research output: Contribution to journalArticle

Graphite
Graphene
Optical microscopy
graphene
Grain boundaries
17 Citations (Scopus)

High-speed and on-chip graphene blackbody emitters for optical communications by remote heat transfer

Miyoshi, Y., Fukazawa, Y., Amasaka, Y., Reckmann, R., Yokoi, T., Ishida, K., Kawahara, K., Ago, H. & Maki, H., Dec 1 2018, In : Nature communications. 9, 1, 1279.

Research output: Contribution to journalArticle

Graphite
Silicon
Optical communication
optical communication
graphene
13 Citations (Scopus)

Hydrogen-Assisted Epitaxial Growth of Monolayer Tungsten Disulfide and Seamless Grain Stitching

Ji, H. G., Lin, Y. C., Nagashio, K., Maruyama, M., Solís-Fernández, P., Sukma Aji, A., Panchal, V., Okada, S., Suenaga, K. & Ago, H., Jan 23 2018, In : Chemistry of Materials. 30, 2, p. 403-411 9 p.

Research output: Contribution to journalArticle

Tungsten
Epitaxial growth
Disulfides
Transition metals
Hydrogen
2 Citations (Scopus)

Moisture barrier properties of single-layer graphene deposited on Cu films for Cu metallization

Gomasang, P., Abe, T., Kawahara, K., Wasai, Y., Nabatova-Gabain, N., Cuong, N. T., Ago, H., Okada, S. & Ueno, K., Apr 2018, In : Japanese Journal of Applied Physics. 57, 4, 04FC08.

Research output: Contribution to journalArticle

Metallizing
moisture
Graphene
graphene
Moisture
8 Citations (Scopus)

Surface-Mediated Aligned Growth of Monolayer MoS2 and In-Plane Heterostructures with Graphene on Sapphire

Suenaga, K., Ji, H. G., Lin, Y. C., Vincent, T., Maruyama, M., Aji, A. S., Shiratsuchi, Y., Ding, D., Kawahara, K., Okada, S., Panchal, V., Kazakova, O., Hibino, H., Suenaga, K. & Ago, H., Jan 1 2018, (Accepted/In press) In : ACS nano.

Research output: Contribution to journalArticle

Graphite
Aluminum Oxide
Sapphire
Graphene
Heterojunctions
9 Citations (Scopus)

Two-step synthesis and characterization of vertically stacked SnS-WS2 and SnS-MoS2 p-n heterojunctions

Sukma Aji, A., Izumoto, M., Suenaga, K., Yamamoto, K., Nakashima, H. & Ago, H., Jan 1 2018, In : Physical Chemistry Chemical Physics. 20, 2, p. 889-897 9 p.

Research output: Contribution to journalArticle

Heterojunctions
heterojunctions
synthesis
Chemical vapor deposition
vapor deposition
2 Citations (Scopus)

Van der Waals interaction-induced photoluminescence weakening and multilayer growth in epitaxially aligned WS 2

Ji, H. G., Maruyama, M., Aji, A. S., Okada, S., Matsuda, K. & Ago, H., Jan 1 2018, In : Physical Chemistry Chemical Physics. 20, 47, p. 29790-29797 8 p.

Research output: Contribution to journalArticle

Aluminum Oxide
Photoluminescence
Multilayers
sapphire
Transition metals
1 Citation (Scopus)
trajectory control
Sputter deposition
interlayers
Nitrogen
Metals
2017
4 Citations (Scopus)
MOSFET devices
metal oxide semiconductors
Etching
field effect transistors
etching
6 Citations (Scopus)

A crystalline germanium flexible thin-film transistor

Higashi, H., Nakano, M., Kudo, K., Fujita, Y., Yamada, S., Kanashima, T., Tsunoda, I., Nakashima, H. & Hamaya, K., Nov 27 2017, In : Applied Physics Letters. 111, 22, 222105.

Research output: Contribution to journalArticle

germanium
transistors
thin films
polyimides
plastics
15 Citations (Scopus)

Behavior and role of superficial oxygen in Cu for the growth of large single-crystalline graphene

Ding, D., Solís-Fernández, P., Yunus, R. M., Hibino, H. & Ago, H., Jun 30 2017, In : Applied Surface Science. 408, p. 142-149 8 p.

Research output: Contribution to journalArticle

Graphite
Graphene
Oxygen
Crystalline materials
Nucleation
1 Citation (Scopus)

Effect of n-type doping level on direct band gap electroluminescence intensity for asymmetric metal/Ge/metal diodes

Maekura, T., Tanaka, K., Motoyama, C., Yoneda, R., Yamamoto, K., Nakashima, H. & Wang, D., Aug 30 2017, In : Semiconductor Science and Technology. 32, 10, 104001.

Research output: Contribution to journalArticle

Electroluminescence
electroluminescence
Diodes
Energy gap
Metals
4 Citations (Scopus)

Effect of post annealing on hole mobility of pseudo-single-crystalline germanium films on glass substrates

Kasahara, K., Higashi, H., Nakano, M., Nagatomi, Y., Yamamoto, K., Nakashima, H. & Hamaya, K., Nov 1 2017, In : Materials Science in Semiconductor Processing. 70, p. 68-72 5 p.

Research output: Contribution to journalArticle

Germanium
Hole mobility
hole mobility
germanium
Electric properties
4 Citations (Scopus)

Electrical properties of epitaxial Lu- or Y-doped La2O3/La2O3/Ge high-k gate-stacks

Kanashima, T., Yamashiro, R., Zenitaka, M., Yamamoto, K., Wang, D., Tadano, J., Yamada, S., Nohira, H., Nakashima, H. & Hamaya, K., Nov 1 2017, In : Materials Science in Semiconductor Processing. 70, p. 260-264 5 p.

Research output: Contribution to journalArticle

Lutetium
Germanium
lutetium
germanium
Electric properties
10 Citations (Scopus)

Epitaxial chemical vapour deposition growth of monolayer hexagonal boron nitride on a Cu(111)/sapphire substrate

Uchida, Y., Iwaizako, T., Mizuno, S., Tsuji, M. & Ago, H., Jan 1 2017, In : Physical Chemistry Chemical Physics. 19, 12, p. 8230-8235 6 p.

Research output: Contribution to journalArticle

Aluminum Oxide
boron nitrides
Chemical vapor deposition
Monolayers
sapphire
2 Citations (Scopus)
Field effect transistors
field effect transistors
conduction
Fabrication
space transportation system
1 Citation (Scopus)

Gate/data-line delay evaluation for large-sized AMOLED

Tsukii, C., Shim, C. H. & Hattori, R., Jan 1 2017, In : Kyokai Joho Imeji Zasshi/Journal of the Institute of Image Information and Television Engineers. 71, 10, p. J224-J229

Research output: Contribution to journalArticle

Electric delay lines
9 Citations (Scopus)

Highly Conductive and Transparent Large-Area Bilayer Graphene Realized by MoCl5 Intercalation

Kinoshita, H., Jeon, I., Maruyama, M., Kawahara, K., Terao, Y., Ding, D., Matsumoto, R., Matsuo, Y., Okada, S. & Ago, H., Nov 6 2017, In : Advanced Materials. 29, 41, 1702141.

Research output: Contribution to journalArticle

Graphite
Intercalation
Graphene
Sheet resistance
Chemical vapor deposition
30 Citations (Scopus)

High Mobility WS2 Transistors Realized by Multilayer Graphene Electrodes and Application to High Responsivity Flexible Photodetectors

Aji, A. S., Solís-Fernández, P., Ji, H. G., Fukuda, K. & Ago, H., Dec 15 2017, In : Advanced Functional Materials. 27, 47, 1703448.

Research output: Contribution to journalArticle

Graphite
Photodetectors
Graphene
photometers
graphene
3 Citations (Scopus)

Mechanism of mobility enhancement in Ge p-channel metal-oxide-semiconductor field-effect transistor due to introduction of Al atoms into SiO2/GeO2 gate stack

Nagatomi, Y., Tateyama, T., Tanaka, S., Wen, W. C., Sakaguchi, T., Yamamoto, K., Zhao, L., Wang, D. & Nakashima, H., Nov 1 2017, In : Materials Science in Semiconductor Processing. 70, p. 246-253 8 p.

Research output: Contribution to journalArticle

MOSFET devices
metal oxide semiconductors
field effect transistors
Annealing
Atoms

Smart steering wheel with swept frequency capacitive sensing

Yutaro, O. N. O., Morimoto, Y., Hattori, R., Watanabe, M., Michida, N. & Nishikawa, K., Nov 2017, In : IEICE Transactions on Electronics. E100C, 11, p. 972-977 6 p.

Research output: Contribution to journalArticle

Wheels
Natural frequencies
Insulating materials
Capacitance
Electrodes
2016
2 Citations (Scopus)

Direct observation of electrically induced Pauli paramagnetism in single-layer graphene using ESR spectroscopy

Fujita, N., Matsumoto, D., Sakurai, Y., Kawahara, K., Ago, H., Takenobu, T. & Marumoto, K., Oct 12 2016, In : Scientific reports. 6, 34966.

Research output: Contribution to journalArticle

paramagnetism
electron paramagnetic resonance
graphene
spectroscopy
electrons
24 Citations (Scopus)

Spatially Controlled Nucleation of Single-Crystal Graphene on Cu Assisted by Stacked Ni

Ding, D., Solís-Fernández, P., Hibino, H. & Ago, H., Dec 27 2016, In : ACS nano. 10, 12, p. 11196-11204 9 p.

Research output: Contribution to journalArticle

Graphite
Graphene
graphene
Nucleation
Single crystals
2011
3 Citations (Scopus)

Aluminum oxide for an effective gate in Si/SiGe two-dimensional electron gas systems

Shin, Y. S., Brunner, R., Shibatomi, A., Obata, T., Otsuka, T., Yoneda, J., Shiraki, Y., Sawano, K., Tokura, Y., Harada, Y., Ishibashi, K. & Tarucha, S., Apr 5 2011, In : Semiconductor Science and Technology. 26, 5, 055004.

Research output: Contribution to journalArticle

Two dimensional electron gas
Aluminum Oxide
Semiconductor quantum dots
electron gas
aluminum oxides
2007

Microreactor utilizing a vertically-aligned carbon nanotube array grown inside the channels

Ishigami, N., Ago, H., Takahashi, K. & Tsuji, M., 2007, In : Chemical Communications. 16, p. 1626-1628 3 p.

Research output: Contribution to journalArticle

2003
32 Citations (Scopus)

Effects of post annealing on removal of defect states in silicon oxynitride films grown by oxidation of silicon substrates nitrided in inductively coupled nitrogen plasma

Perera, R., Ikeda, A., Hattori, R. & Kuroki, Y., Jan 15 2003, In : Thin Solid Films. 423, 2, p. 212-217 6 p.

Research output: Contribution to journalArticle

Nitrogen plasma
nitrogen plasma
oxynitrides
Inductively coupled plasma
Silicon
6 Citations (Scopus)

Fabrication of on-chip microcapillary using photosensitive glass

Etoh, S., Fujimura, T., Hattori, R. & Kuroki, Y., Oct 1 2003, In : Microsystem Technologies. 9, 8, p. 541-545 5 p.

Research output: Contribution to journalArticle

Photosensitive glass
Aspect ratio
chips
Fabrication
Glass
11 Citations (Scopus)

Fabrication of open-top microchannel plate using deep X-ray exposure mask made with silicon on insulator substrate

Fujimura, T., Ikeda, A., Etoh, S. I., Hattori, R., Kuroki, Y. & Chang, S. S., Jun 2003, In : Japanese Journal of Applied Physics, Part 1: Regular Papers & Short Notes. 42, 6 B, p. 4102-4106 5 p.

Research output: Contribution to journalArticle

microchannel plates
Microchannels
high aspect ratio
Aspect ratio
Masks
4 Citations (Scopus)

Observation of on-chip electrophoresis microcapillary using confocal laser scanning microscopy

Etoh, S., Fujimura, T., Hattori, R. & Kuroki, Y., Jun 1 2003, In : Japanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers. 42, 6 B, p. 4093-4097 5 p.

Research output: Contribution to journalArticle

electrophoresis
Electrophoresis
Microscopic examination
Photosensitive glass
chips