Bulk ACCVD Generation of SWNTs with Narrow Chirality Distribution (2009)
Shigeo Maruyama, Yuhei Miyauchi, Takashi Shimada, Yoichi Murakami, Kenichi Sato, Yuji Ozeki, ...
By scaling up the alcohol CCVD (ACCVD) generation technique [1,2] of single-walled carbon nanotubes (SWNTs), bulk amount of sample is being prepared. By dissolving zeolite used as catalysts support,...
Environmental Effect on the UV Optical Absorption of Single- Walled Carbon Nanotubes (2009)
Yoichi Murakami, Shigeo Maruyama
We studied optical absorption of single-walled carbon nanotubes by varying the dielectric environment. For the two different components of the broad UV absorption feature conventionally referred to...
Yoichi Murakami, Benjamin Lu, Said Kazaoui, Nobutsugu Minami, Tatsuya Okubo, Shigeo Maruyama
sidebands of carbon nanotubes below the bright singlet excitonic levels: Coupling between dark excitons
Kazunari Matsuda, Tadashi Inoue, Yoichi Murakami, Shigeo Maruyama, Yoshihiko Kanemitsu
recombinations and exciton fine structures studied by
Production and applications of vertically aligned single-walled carbon nanotubes (2009)
Erik Einarsson, Yoichi Murakami, Masayuki Kadowaki, Hai M. Duong, Mitsuru Inoue, Shigeo Maruyama
Synthesis of vertically aligned single-walled carbon nanotube (VA-SWNT) thin films by alcohol catalytic chemical vapor deposition has been clarified using an in situ optical absorbance measurement...
Reversible Irreversible (2009)
Rong Xiang, Jun Okawa, Zhengyi Zhang, Erik Einarsson, Yohei Miyauchi, Yoichi Murakami, ...
With an in situ optical absorption, [1] we studied the influences of different foreign molecules on the activity of Co/Mo in alcohol catalytic chemical vapor deposition (ACCVD). An interesting growth...
Kazunari Matsuda, Tadashi Inoue, Yoichi Murakami, Shigeo Maruyama, Yoshihiko Kanemitsu
fine structures in a single carbon nanotube
Murakami, Yoichi, Kono, Junichiro
Through an investigation of photoemission properties of highly-photoexcited single-walled carbon nanotubes, we demonstrate that there is an upper limit on the achievable excitonic density. As the...
Environmental Effect on the UV Optical Absorption of Single-Walled Carbon Nanotubes (2008)
Murakami, Yoichi, Maruyama, Shigeo
We studied optical absorption of single-walled carbon nanotubes by varying the dielectric environment. For the two different components of the broad UV absorption feature conventionally referred to...
This paper has been withdrawn by the author due to a necessity of further editing. (Will be resubmitted here or elsewhere in editted form.)
Murakami, Yoichi, Lu, Benjamin, Kazaoui, Said, Minami, Nobutsugu, Okubo, Tatsuya, Maruyama, Shigeo
We performed detailed photoluminescence (PL) spectroscopy studies of three different types of single-walled carbon nanotubes (SWNTs) by using samples that contain essentially only one chiral type of...
Exciton fine structure in a single carbon nanotube revealed through spectral diffusion (2008)
Matsuda, Kazunari, Inoue, Tadashi, Murakami, Yoichi, Maruyama, Shigeo, Kanemitsu, Yoshihiko
We studied the spectral diffusion land exciton fine structures of single-walled carbon nanotubes (SWNTs) by using single carbon nanotube spectroscopy. Two types of single nanotube photoluminescence...
Exciton fine structure in a single carbon nanotube revealed through spectral diffusion (2008)
Matsuda, Kazunari, Inoue, Tadashi, Murakami, Yoichi, Maruyama, Shigeo, Kanemitsu, Yoshihiko
We studied the spectral diffusion and exciton fine structures of single-walled carbon nanotubes (SWNTs) by using single carbon nanotube spectroscopy. Two types of single nanotube photoluminescence...
Temperature Measurements of Single-walled Carbon Nanotubes by Raman Scattering (2008)
Shohei Chiashi, Yoichi Murakami, Yuhei Miyauchi, Shigeo Maruyama
The many unique physical properties of single-walled carbon nanotubes (SWNTs), including heat transfer properties, have been studied in recent years. SWNTs have extremely high thermal conductivity...
Paper No. Proceeding of the 1st International Forum on Heat Transfer (2008)
Yoichi Murakami, Tadao Edamura, Erik Einarsson, Shohei Chiashi, Yuhei Miyauchi, Shigeo Maruyama
Thermal CVD growth of vertically aligned single-walled carbon nanotube films on substrates and their optical/microscopical characterizations
individual single-walled (2008)
Tadashi Inoue, Kazunari Matsuda, Yoichi Murakami, Shigeo Maruyama, Yoshihiko Kanemitsu
Diameter dependence of exciton-phonon interaction in
Growth and control of vertically aligned (2008)
Erik Einarsson, Masayuki Kadowaki, Hai M Duong, Yoichi Murakami, Shigeo Maruyama
Previous investigations [1,2] into the growth of vertically aligned single-walled carbon nanotube (VA-SWNT) films from alcohol have shown that the maximum achievable film thickness is largely...
Shigeo Maruyama, Yuhei Miyauchi, Yoichi Murakami, Shohei Chiashi, Shigeo Maruyama
The single-walled carbon nanotubes (SWNTs) synthesized by a catalytic decomposition of alcohol (Alcohol CVD method, ACCVD) are compared with HiPco SWNTs sample through optical spectroscopic...
Shohei Chiashi, Yoichi Murakami, Yuhei Miyauchi, Shigeo Maruyama
peak, radial breathing mode peak, resonance Raman effect We measured Raman scatterings from various single-walled carbon nanotube (SWNT) samples over a wide temperature range (4-1000 K). The G-band...
GROWTH PROCESS OF VERTICALLY ALIGNED SINGLE-WALLED CARBON NANOTUBES (2008)
Erik Einarsson, Tadao Edamura, Yoichi Murakami, Toshiaki Nishii, Shigeo Maruyama
The recent boom in nanoscience and nanotechnology research is largely due to the novel electronic, thermal, and mechanical properties [1,2] of single-walled carbon nanotubes (SWNTs). The ability to...
Yuhei Miyauchi, Shohei Chiashi, Yoichi Murakami, Yasunori Hayashida, Shigeo Maruyama
Chem. Phys. Lett,. in press
Synthesis of Single-Walled Carbon Nanotube Film on Quartz Substrate from Carbon Monoxide (2008)
Toshiaki Nishii, Yoichi Murakami, Erik Einarsson, Naoto Masuyama, Shigeo Maruyama
The discovery of single-walled carbon nanotubes (SWNTs) in 1993 by Iijima and Ichihashi [1] has stimulated many researchers to utilize for the innovative technology, especially applications to...
Shigeo Maruyama, Yoichi Murakami, Yuhei Miyauchi, Shohei Chiashi
High purity single-walled carbon nanotubes (SWNTs) were synthesized by the alcohol catalytic CVD method (ACCVD method) where ethanol vapor was used as a carbon feedstock [1, 2]. For the bulk...
Yoichi Murakami, Erik Einarsson, Tadao Edamura, Shigeo Maruyama
Single-walled carbon nanotubes (SWNTs) are 1 dimensional (1D) tubular material with sp 2 bonded graphene wall. Their unique geometry gives rise to sharp divergences in electronic density of states and
Shohei Chiashi, Yoichi Murakami, Yuhei Miyauchi, Shigeo Maruyama
We generated high-quality single-walled carbon nanotubes (SWNTs) with alcohol catalytic CVD (ACCVD) method in the AFM sample stage, and measured Raman scatterings from the sample during the CVD...
Shigeo Maruyama, Yoichi Murakami, Yasushi Shibuta, Yuhei Miyauchi, Shohei Chiashi
Recent advances in high-purity and high-yield catalytic CVD generation of single-walled carbon nanotubes (SWNTs) from alcohol are comprehensively presented and discussed based on the results obtained...
TEMPERATURE MEASUREMENTS OF SINGLE-WALLED CARBON NANOTUBES BY RAMAN SCATTERINGS (2008)
Shohei Chiashi, Yoichi Murakami, Yuhei Miyauchi, Erik Einarsson, Shigeo Maruyama
The discovery of single-walled carbon nanotubes (SWNTs) 1 has invoked numerous research interests because of their unique physical properties 2 and hence remarkable potential as a new material for...
Kazunori Hoshino, Yoichi Murakami, Shigeo Maruyama, Kiyoshi Matsumoto, Isao Shimoyama
We have build a system for real-time in-situ measurement of electromechanical properties of single-walled carbon nanotubes (SWNTs) growing between electrostatically actuated silicon cantilevers faced...
size-selected catalytic (2008)
Masamichi Kohno, Takaaki Orii, Makoto Hirasawa, Takafumi Seto, Yoichi Murakami, Shohei Chiashi, ...
single-walled carbon nanotubes from
Shigeo Maruyama, Yoichi Murakami, Erik Einarsson, Tadao Edamura
Vertically aligned single-walled carbon nanotubes (SWNTs) up to 5 microns thick as shown in Fig 1 were produced by an alcohol CVD process [1]. In contrast to the first report of CVD growth of...
Submitted to Physical Review B (2008)
Yoichi Murakami, Shohei Chiashi, Erik Einarsson, Shigeo Maruyama
Polarization dependence of resonant Raman scattering from
Direct synthesis of single-walled carbon nanotubes on silicon and quartz-based systems (2008)
Yoichi Murakami, Shohei Chiashi, Yuhei Miyauchi, Shigeo Maruyama
A newly developed technique of synthesizing single-walled carbon nanotubes (SWNTs) directly on the surface of Si and quartz substrates is introduced in this report. This technique adopted a...
Exciton dephasing and multiexciton recombinations in a single carbon nanotube (2008)
Kazunari Matsuda, Tadashi Inoue, Yoichi Murakami, Shigeo Maruyama, Yoshihiko Kanemitsu
We studied the temperature and excitation intensity dependence of exciton luminescence in individual single-walled carbon nanotubes (SWNTs) using single nanotube photoluminescence (PL) spectroscopy....
Yoichi Murakami, Erik Einarsson, Tadao Edamura, Shigeo Maruyama
Polarization dependent optical absorption properties of single-walled carbon nanotubes and methodology
Exciton dephasing and multiexciton recombinations in a single carbon nanotube (2008)
Matsuda, Kazunari, Inoue, Tadashi, Murakami, Yoichi, Maruyama, Shigeo, Kanemitsu, Yoshihiko
We studied the temperature and excitation intensity dependence of exciton luminescence in individual single-walled carbon nanotubes (SWNTs) using single nanotube photoluminescence (PL) spectroscopy....
Exciton dephasing and multiexciton recombinations in a single carbon nanotube (2008)
Matsuda, Kazunari, Inoue, Tadashi, Murakami, Yoichi, Maruyama, Shigeo, Kanemitsu, Yoshihiko
We studied the temperature and excitation intensity dependence of exciton luminescence in individual single-walled carbon nanotubes (SWNTs) using single nanotube photoluminescence (PL) spectroscopy....
Chemical Physics Letters, in press. (2007)
Yoichi Murakami, Yuhei Miyauchi, Shohei Chiashi, Shigeo Maruyama
Direct synthesis of high-quality single-walled carbon nanotubes on silicon and quartz substrates
Einarsson, Erik, Murakami, Yoichi, Kadowaki, Masayuki, Maruyama, Shigeo
An in situ optical absorbance measurement was used to study the growth dynamics of vertically aligned single-walled carbon nanotubes (VA-SWCNTs) synthesized by chemical vapor deposition of ethanol....
Kinoshita, Kengo, Murakami, Yoichi, Nakamura, Haruki
We have developed a method to predict ligand-binding sites in a new protein structure by searching for similar binding sites in the Protein Data Bank (PDB). The similarities are measured according to...
Ohno, Yutaka, Iwasaki, Shinya, Murakami, Yoichi, Kishimoto, Shigeru, Maruyama, Shigeo, Mizutani, Takashi
Environmental dielectric screening effects on exciton transition energies in single-walled carbon nanotubes (SWNTs) have been studied quantitatively in the range of dielectric constants from 1.0 to...
Inoue, Tadashi, Matsuda, Kazunari, Murakami, Yoichi, Maruyama, Shigeo, Kanemitsu, Yoshihiko
We have investigated the diameter dependence of the exciton luminescence linewidth in individual single-walled carbon nanotubes (SWNTs) by means of microphotoluminescence (µ-PL) spectroscopy. The...
SHARP2: protein-protein interaction predictions using patch analysis (2006)
Murakami, Yoichi, Jones, Susan
Summary: SHARP2 is a flexible web-based bioinformatics tool for predicting potential protein–protein interaction sites on protein structures. It implements a predictive algorithm that calculates...
Polarization dependence of the optical absorption of single-walled carbon nanotubes (2005)
Yoichi Murakami, Erik Einarsson, Tadao Edamura, Shigeo Maruyama
Anisotropic optical absorption properties of single-walled carbon nanotubes (SWNTs) are determined from a vertically aligned SWNT film for 0.5- 6 eV. Absorption peaks at 4.5 and 5.25 eV are found to...
Shohei Chiashi, Yoichi Murakami, Yuhei Miyauchi, Shigeo Maruyama
Catalytic CVD generation of high-purity single-walled carbon nanotubes (SWNTs) without use of an electric furnace or a hot-filament is demonstrated. High-purity SWNTs were generated from alcohol used...
Chemical Physics Letters in press. (2004)
Shigeo Maruyama, Erik Einarsson, Yoichi Murakami, Tadao Edamura
Vertically aligned single-walled carbon nanotube films up to 5 µm thick were produced by an alcohol CVD process, in which hydrogen was supplied during the heating-up stage only. A time-progressive...
Characterization of Single-Walled Carbon Nanotubes Catalytically Synthesized from Alcohol (2003)
Yoichi Murakami, Yuhei Miyauchi, Shohei Chiashi, Shigeo Maruyama
High purity single-walled carbon nanotubes (SWNTs) were synthesized from ethanol by catalytic CVD method. The yield of SWNTs was determined based on TGA complemented by Raman and TEM analyses. The...
Synthesis of single-walled carbon nanotubes with narrow diameter-distribution from fullerene (2003)
Shigeo Maruyama, Yuhei Miyauchi, Tadao Edamura, Yasuhiro Igarashi, Shohei Chiashi, Yoichi Murakami
Single-walled carbon nanotubes with narrow diameter-distributions were synthesized by the catalytic CVD technique usingfngv84/Fv C 60 or C 70 , as the carbon source. Fe/Co bimetal particles supported...
Yoichi Murakami, Shohei Chiashi, Yuhei Miyauchi, Shigeo Maruyama
A new technique of synthesizing single-walled carbon nanotubes (SWNTs) directly on the surface of Si and quartz substrates is introduced in this report. This technique adopted a liquid based dip-coat...
Suguru Noda A, Yoshiko Tsuji, Yoichi Murakami, Shigeo Maruyama
method to prepare metal nanoparticles that catalyze the
Tanaka, Makoto, Kato, Kinuyo, Hakusui, Hideo, Murakami, Yoichi, Sato, Kenichi, Ito, Yasushi, ...
DZ-2640 is the ester-type oral carbapenem prodrug of an active parent compound, DU-6681. The pharmacokinetics and safety of DU-6681 were investigated in six studies after oral administration of a...
In Vitro and In Vivo Antibacterial Activities of DK-507k, a Novel Fluoroquinolone
Otani, Tsuyoshi, Tanaka, Mayumi, Ito, Emi, Kurosaka, Yuichi, Murakami, Yoichi, Onodera, Kiyomi, ...
The antibacterial activities of DK-507k, a novel quinolone, were compared with those of other quinolones: ciprofloxacin, gatifloxacin, levofloxacin, moxifloxacin, sitafloxacin, and garenoxacin...
Tanaka, Makoto, Kato, Kinuyo, Hakusui, Hideo, Murakami, Yoichi, Sato, Kenichi, Ito, Yasushi, ...
DZ-2640 is the ester-type oral carbapenem prodrug of an active parent compound, DU-6681. The pharmacokinetics and safety of DU-6681 were investigated in six studies after oral administration of a...
In Vitro and In Vivo Antibacterial Activities of DK-507k, a Novel Fluoroquinolone
Otani, Tsuyoshi, Tanaka, Mayumi, Ito, Emi, Kurosaka, Yuichi, Murakami, Yoichi, Onodera, Kiyomi, ...
The antibacterial activities of DK-507k, a novel quinolone, were compared with those of other quinolones: ciprofloxacin, gatifloxacin, levofloxacin, moxifloxacin, sitafloxacin, and garenoxacin...
Kinoshita, Kengo, Murakami, Yoichi, Nakamura, Haruki
We have developed a method to predict ligand-binding sites in a new protein structure by searching for similar binding sites in the Protein Data Bank (PDB). The similarities are measured according to...
In Vitro and In Vivo Antibacterial Activities of DC-159a, a New Fluoroquinolone▿
Hoshino, Kazuki, Inoue, Kazue, Murakami, Yoichi, Kurosaka, Yuichi, Namba, Kenji, Kashimoto, Yoshinori, ...
DC-159a is a new 8-methoxy fluoroquinolone that possesses a broad spectrum of antibacterial activity, with extended activity against gram-positive pathogens, especially streptococci and staphylococci...