Zobrazeno 1 - 10
of 318
pro vyhledávání: '"Kazuhiko Hirakawa"'
Autor:
Kenji Shibata, Masaki Yoshida, Kazuhiko Hirakawa, Tomohiro Otsuka, Satria Zulkarnaen Bisri, Yoshihiro Iwasa
Publikováno v:
Nature Communications, Vol 14, Iss 1, Pp 1-8 (2023)
Abstract Colloidal quantum dots are sub-10 nm semiconductors treated with liquid processes, rendering them attractive candidates for single-electron transistors operating at high temperatures. However, there have been few reports on single-electron t
Externí odkaz:
https://doaj.org/article/476bd517a3b54ec4aaf950b7e63d74a9
Publikováno v:
Applied Physics Express, Vol 17, Iss 7, p 075002 (2024)
We have developed a theory for electromigration at metal nanocontacts. In the proposed theory, a metal atom is removed by kinetic energy transfer from a “lucky electron” that ballistically traverses a metal nanocontact, when the applied voltage e
Externí odkaz:
https://doaj.org/article/4e8289334dda4ed4ac628e73295460a4
Publikováno v:
Sensors, Vol 23, Iss 13, p 5938 (2023)
The doubly clamped microelectromechanical system (MEMS) beam resonators exhibit extremely high sensitivity to tiny changes in the resonance frequency owing to their high quality (Q-) factors, even at room temperature. Such a sensitive frequency-shift
Externí odkaz:
https://doaj.org/article/d768199e9315432581eab33c6e92a0a7
Autor:
Yangyu Guo, Marc Bescond, Zhongwei Zhang, Shiyun Xiong, Kazuhiko Hirakawa, Masahiro Nomura, Sebastian Volz
Publikováno v:
APL Materials, Vol 9, Iss 9, Pp 091104-091104-12 (2021)
Anderson localization of thermal phonons has been shown only in few nanostructures with strong random disorder by the exponential decay of transmission to zero and a thermal conductivity maximum when increasing the system length. In this work, we pre
Externí odkaz:
https://doaj.org/article/4983318d505944dfac2f62b269255bfd
Publikováno v:
Nature Communications, Vol 10, Iss 1, Pp 1-7 (2019)
Designing efficient integrated cooling solutions by controlling heat management in nanodevices remains a challenge. Here, the authors propose evaporative electron cooling in the AlGaAs/GaAs double barrier heterostructures quantum well achieving up to
Externí odkaz:
https://doaj.org/article/f7012f756cde4d70ba6973b232c3e822
Publikováno v:
Sensors, Vol 22, Iss 14, p 5109 (2022)
Terahertz (THz) electromagnetic waves are attractive for use in nondestructive and biocompatible sensing applications. Thermal sensors are widely used for THz detection owing to the small photon energies of THz radiation, where this requires material
Externí odkaz:
https://doaj.org/article/236f67d1516d44c8b06eb5d53c2fbdf5
Publikováno v:
AIP Advances, Vol 9, Iss 8, Pp 085102-085102-4 (2019)
We have fabricated two-dimensional nanometer-scale hole array structures on GaAs doubly-clamped microelectromechanical system (MEMS) beam resonators to modulate their thermal properties. Owing to the reduction in the thermal conductance of the MEMS b
Externí odkaz:
https://doaj.org/article/6c235aeca5a847bab62a3745ca2496b2
Autor:
Run Hu, Sotaro Iwamoto, Lei Feng, Shenghong Ju, Shiqian Hu, Masato Ohnishi, Naomi Nagai, Kazuhiko Hirakawa, Junichiro Shiomi
Publikováno v:
Physical Review X, Vol 10, Iss 2, p 021050 (2020)
Lattice heat conduction can be modulated via nanostructure interfaces. Although advances have been made by viewing phonons as particles, the controllability should be enhanced by fully utilizing their wave nature. By considering phonons as coherent w
Externí odkaz:
https://doaj.org/article/68ba645654aa48e9a158f8c97826c99b
Autor:
Ingemar Persson, Hugo Laval, Sylvain Chambon, Gwenael Bonfante, Kazuhiko Hirakawa, Guillaume Wantz, Benjamin Watts, Matthew A. Marcus, Xiaoxue Xu, Lei Ying, Girish Lakhwani, Mats R. Andersson, Julie M. Cairney, Natalie P. Holmes
Publikováno v:
Nanoscale. 15:6126-6142
The first report of sub-4 nm mapping of donor : acceptor nanoparticle composition in eco-friendly colloidal dispersions for organic electronics.
Autor:
Hugo Laval, Alexandre Holmes, Matthew A. Marcus, Benjamin Watts, Gwenaël Bonfante, Marc Schmutz, Elise Deniau, Robin Szymanski, Christine Lartigau‐Dagron, Xiaoxue Xu, Julie M. Cairney, Kazuhiko Hirakawa, Fumiyasu Awai, Takaya Kubo, Guillaume Wantz, Antoine Bousquet, Natalie P. Holmes, Sylvain Chambon
Publikováno v:
Advanced Energy Materials.