Research Output 1982 2020

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
2 Citations (Scopus)

A Capacitive Power Transfer System with a CL Network for Improved System Performance

Mostafa, T. M., Bui, D., Muharam, A., Hattori, R. & Hu, A. P., Feb 11 2019, 2018 IEEE Wireless Power Transfer Conference, WPTC 2018. Institute of Electrical and Electronics Engineers Inc., 8639497. (2018 IEEE Wireless Power Transfer Conference, WPTC 2018).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Networks (circuits)
Electric potential
Electric fields
Capacitance
Compensation and Redress

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

A single-wire method of coupling interface in capacitive power transfer for electric vehicle wireless charging system

Muharam, A., Mostafa, T. M., Nugroho, A., Hapid, A. & Hattori, R., Jan 25 2019, Proceedings - 6th International Conference on Sustainable Energy Engineering and Application, ICSEEA 2018. Yazid, E., Mirdanies, M., Riyanto, E. & Mukti, E. W. (eds.). Institute of Electrical and Electronics Engineers Inc., p. 39-43 5 p. 8627079. (Proceedings - 6th International Conference on Sustainable Energy Engineering and Application, ICSEEA 2018).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Chassis
Electric vehicles
Electric fields
Wire
Electric potential

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
1 Citation (Scopus)

Power Loss Analysis of Inverter with and without Transformer for Capacitive Power Transfer

Muharam, A., Mostafa, T. M., Nugroho, A. & Hattori, R., Feb 11 2019, 2018 IEEE Wireless Power Transfer Conference, WPTC 2018. Institute of Electrical and Electronics Engineers Inc., 8639407. (2018 IEEE Wireless Power Transfer Conference, WPTC 2018).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Electric potential
Capacitance
Resonant circuits
Pulse generators
Circuit simulation

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

DC-DC Converter Based Impedance Matching for Maximum Power Transfer of CPT System with High Efficiency

Bui, D., Mostafa, T. M., Hu, A. P. & Hattori, R., Aug 29 2018, 2018 IEEE PELS Workshop on Emerging Technologies: Wireless Power Transfer, Wow 2018. Institute of Electrical and Electronics Engineers Inc., 8450929

Research output: Chapter in Book/Report/Conference proceedingConference contribution

DC-DC Converter
DC-DC converters
Impedance
High Efficiency
Coupled circuits
7 Citations (Scopus)

Design of power receiving side in wireless charging system for UAV application

Muharam, A., Mostafa, T. M. & Hattori, R., Jan 23 2018, Proceeding - ICSEEA 2017 International Conference on Sustainable Energy Engineering and Application: "Continuous Improvement of Sustainable Energy for Eco-Mobility". Darussalam, R., Sya'bana, Y. M. K., Rajani, A., Martides, E., Atmaja, T. D. & Pramana, R. I. (eds.). Institute of Electrical and Electronics Engineers Inc., Vol. 2018-January. p. 133-139 7 p.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Unmanned aerial vehicles (UAV)
Networks (circuits)
DC-DC converters
Capacitors
Ions
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. & Jun-Ichiro, H., 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 1 2018, In : Japanese Journal of Applied Physics. 57, 4, 04FC08.

Research output: Contribution to journalArticle

Metallizing
moisture
Graphene
graphene
Moisture
2 Citations (Scopus)

Optimizing performance of reflectance-based organic Photoplethysmogram (PPG) sensor

Bilgaiyan, A., Sugawara, R., Elsamnah, F., Shim, C., Affiq, M. & Hattori, R., Jan 1 2018, Organic and Hybrid Sensors and Bioelectronics XI. Kymissis, I., List-Kratochvil, E. J. W., Shinar, R. & Torsi, L. (eds.). SPIE, 1073808. (Proceedings of SPIE - The International Society for Optical Engineering; vol. 10738).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Reflectance
reflectance
Sensor
sensors
Sensors
2 Citations (Scopus)

Reflectance-based monolithic organic pulsemeter device for measuring photoplethysmogram signal

Elsamnah, F., Hattori, R., Affiq, M., Shim, C. H., Bilgaiyan, A. & Sugawara, R., Jul 10 2018, I2MTC 2018 - 2018 IEEE International Instrumentation and Measurement Technology Conference: Discovering New Horizons in Instrumentation and Measurement, Proceedings. Institute of Electrical and Electronics Engineers Inc., p. 1-5 5 p. (I2MTC 2018 - 2018 IEEE International Instrumentation and Measurement Technology Conference: Discovering New Horizons in Instrumentation and Measurement, Proceedings).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Bluetooth
Organic light emitting diodes (OLED)
Photodiodes
reflectance
heart rate

Smart steering wheel with swept frequency capacitive sensing

Ono, Y., Morimoto, Y., Hattori, R., Watanabe, M., Michida, N. & Nishikawa, K., Jan 1 2018, 23rd International Display Workshops in conjunction with Asia Display, IDW/AD 2016. Society for Information Display, Vol. 4. p. 2191-2194 4 p.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Wheels
Natural frequencies
Insulating materials
Capacitance
Electrodes
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
1 Citation (Scopus)

Achievement of ultralow contact resistivity of metal/n + -ge contacts with Zr-N-Ge amorphous interlayer

Nakashima, H., Okamoto, H., Yamamoto, K. & Wang, D., Jan 1 2017, ECS Transactions. Shiojima, K., Mai, A., Murota, J., Chin, P., Claeys, C. L., Iwai, H., Deleonibus, S. & Tao, M. (eds.). 4 ed. Electrochemical Society Inc., p. 97-106 10 p. (ECS Transactions; vol. 80, no. 4).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Metals
Sputter deposition
Metallizing
Fermi level
Electric properties
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

Crystal growth and device applications of two-dimensional layered materials

Ago, H., Aug 8 2017, AM-FPD 2017 - 24th International Workshop on Active-Matrix Flatpanel Displays and Devices: TFT Technologies and FPD Materials, Proceedings. Institute of Electrical and Electronics Engineers Inc., p. 86-87 2 p. 8006085. (AM-FPD 2017 - 24th International Workshop on Active-Matrix Flatpanel Displays and Devices: TFT Technologies and FPD Materials, Proceedings).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Crystal growth
Electronic properties
Graphene
Heterojunctions
Structural properties
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