Zobrazeno 1 - 10
of 270
pro vyhledávání: '"Takeo Yamada"'
Publikováno v:
Nanomaterials, Vol 14, Iss 6, p 528 (2024)
Achieving the thermal conductivity required for efficient heat management in semiconductors and other devices requires the integration of thermally conductive ceramic fillers at concentrations of 60 vol% or higher. However, an increased filler conten
Externí odkaz:
https://doaj.org/article/2a42fb374459478e959f9c53a316abc0
Publikováno v:
Journal of Materials Research and Technology, Vol 9, Iss 3, Pp 6944-6949 (2020)
We report for the first time the coefficient of thermal expansion (CTE) of Cu/carbon nanotube (Cu/CNT) macroscopic wire composites and its strong dependence on CNT-Cu mixing. Homogeneous composite wires with 40 vol% nanotubes uniformly mixed in conti
Externí odkaz:
https://doaj.org/article/eec1d86277714a849447818afbfd673f
Publikováno v:
Carbon Trends, Vol 5, Iss , Pp 100112- (2021)
Suspended thin film carbon nanotubes with suitable mechanical strength are in high demand for applications such as sensors, particle filters, or thermoacoustic speakers. However, researchers working on the production and development of applications f
Externí odkaz:
https://doaj.org/article/4dbbed590d01435eae3d28fce6c2d382
Autor:
Yuichi Kato, Atsuko Sekiguchi, Kazufumi Kobashi, Rajyashree Sundaram, Takeo Yamada, Kenji Hata
Publikováno v:
Frontiers in Materials, Vol 7 (2020)
Carbon nanotubes (CNTs) have garnered tremendous attention as building blocks for self-supporting membranes owing to remarkable developments in the manufacturing technology of high-quality CNT films. CNT films are expected to be applied in a wide ran
Externí odkaz:
https://doaj.org/article/bd7e9ad4971f4811b25a4538be8abf15
Publikováno v:
Nanoscale Research Letters, Vol 12, Iss 1, Pp 1-9 (2017)
Abstract We propose a porosimetry-based method to characterize pores formed by carbon nanotubes (CNTs) in the CNT agglomerates for designing neat CNT-based materials and composites. CNT agglomerates contain pores between individual CNTs and/or CNT bu
Externí odkaz:
https://doaj.org/article/e4ea89e2fc8544e0a177931e977c9a3a
Autor:
Rajyashree Sundaram, Atsuko Sekiguchi, Guohai Chen, Don Futaba, Takeo Yamada, Ken Kokubo, Kenji Hata
Publikováno v:
C, Vol 7, Iss 4, p 78 (2021)
Carbon nanotube (CNT)/copper composites offer promise as lightweight temperature-stable electrical conductors for future electrical and electronic devices substituting copper. However, clarifying how constituent nanotube structures influence CNT/Cu e
Externí odkaz:
https://doaj.org/article/367bfb542ca54283b1c63d536d105ea6
Autor:
Seiji Kataoka, Takeo Yamada
Publikováno v:
Operations Research Perspectives, Vol 3, Iss C, Pp 5-13 (2016)
We formulate the minimum spanning tree problem with resource allocation (MSTRA) in two ways, as discrete and continuous optimization problems (d-MSTRA/c-MSTRA), prove these to be NP-hard, and present algorithms to solve these problems to optimality.
Externí odkaz:
https://doaj.org/article/de1edf77939e474fb8c68ce66001c33e
Publikováno v:
Royal Society Open Science, Vol 5, Iss 11 (2018)
We present research progress made in developing copper/carbon nanotube composites (Cu/CNT) to fulfil a growing demand for lighter copper substitutes with superior electrical, thermal and mechanical performances. Lighter alternatives to heavy copper e
Externí odkaz:
https://doaj.org/article/b4f79de45f0647d3937c9603e5676db2
Autor:
Naoyuki Matsumoto, Azusa Oshima, Shunsuke Sakurai, Takeo Yamada, Motoo Yumura, Kenji Hata, Don N. Futaba
Publikováno v:
Nanomaterials, Vol 5, Iss 3, Pp 1200-1210 (2015)
One aspect of carbon nanotube (CNT) synthesis that remains an obstacle to realize industrial mass production is the growth efficiency. Many approaches have been reported to improve the efficiency, either by lengthening the catalyst lifetime or by inc
Externí odkaz:
https://doaj.org/article/5ca900e2569c4039bbbfaf8984f6d170
Autor:
Hiroe Kimura, Bin Zhao, Don N. Futaba, Takeo Yamada, Hiroyuki Kurachi, Sashiro Uemura, Kenji Hata
Publikováno v:
APL Materials, Vol 1, Iss 3, Pp 032101-032101 (2013)
Laterally aligned carbon nanotube (CNT) arrays “blossomed” homogeneously in honeycomb holes of a metal grid substrate were explored as rational architecture for field emission. A low turn-on field (TOF) of 1.09 V/μm for 10 μA/cm2 emission was a
Externí odkaz:
https://doaj.org/article/5af497f558b94ee2a6ac28ff0d48ebdc