HISHITA Shunichi

J-GLOBAL         Last updated: Dec 17, 2018 at 14:07
HISHITA Shunichi
National Institute for Materials Science

Research Areas


Published Papers

Meiyong Liao, Masaya Toda, Liwen Sang, Shunichi Hishita, Shuji Tanaka, Yasuo Koide
Applied Physics Letters   105(25) 251904-251904-5   Dec 2014   [Refereed]
The authors report the resonance frequency and the energy dissipation of single crystal diamond cantilevers with different dimensions, which were fabricated by ion implantation assisted technique. The resonance frequency well followed the inverse ...
岩田 晋, 菱田 俊一, 野家 彰, 池田 進
Science Academy of Tsukuba (SAT)   (28) 2-6   Sep 2015
Sugavaneshwar Ramu Pasupathi, Thang Duy Dao, Nanda Karuna Kar, Nagao Tadaaki, Hishita Shunichi, Sakaguchi Isao
RADIATION EFFECTS AND DEFECTS IN SOLIDS   170(12) 939-944   Dec 2015   [Refereed]
We report the synthesis of ZnO nanowires in ambient air at 650。・ by a single-step vapor transport method using two different sources Zn (ZnO nanowires-I) and Zn:Cu (ZnO nanowires-II). The Zn:Cu mixed source co-vaporize Zn with a small amount of Cu...
Hashiguchi Minako, Sakaguchi Isao, Hishita Shunichi, Ohashi Naoki
JOURNAL OF THE CERAMIC SOCIETY OF JAPAN   122(1426) 421-425   Jun 2014   [Refereed]
This paper reports study of zinc (Zn)-antimony (Sb) interactions as well as oxygen defect chemistry in dense SnO2 ceramics using secondary ion mass spectrometry (SIMS). Dense SnO2 ceramics with ZnO and Sb2O5 additives with different concentration ...
Srinivasu Pavuluri, Vinu Ajayan, Hishita Shunichi, Sasaki Toshio, Ariga Katsuhiko, Mori Toshiyuki
MICROPOROUS AND MESOPOROUS MATERIALS   108(1-3) 340-344   Feb 2008   [Refereed]
A novel microporous carbon nitride material (Mic-CN-1) with very high surface area and pore volume has been prepared for the first time by nanocasting technique using MCM-22 zeolite as a template through a simple polymerization reaction between et...
Aizawa Takashi, Hishita Shunichi, Otani Shigeki
JOURNAL OF CRYSTAL GROWTH   310(1) 22-25   Jan 2008   [Refereed]
Plasma-assisted molecular beam epitaxy of GaN was studied on (111) surfaces of several transition-metal carbides (TMC): TiC, ZrC, NbC, and ZrTexNbTexC. On these surfaces, GaN grew epitaxially. Especially, on ZrTexNbTexC(111), w...
JOURNAL OF CHEMICAL SCIENCES   126(2) 517-525   Mar 2014   [Refereed]
Nanocrystalline PrFeO3 perovskite type orthoferrite was synthesized at 700◦C by using three differentsynthesis methods, namely sol–gel, template and combustion method. The synthesized materials were characterized by XRD, BET-SA, SEM, H...
Vaithianathan Veeramuthu, Hishita Shunichi, Moon Jong Ha, Kim Sang Sub
THIN SOLID FILMS   515(17) 6927-6930   Jun 2007   [Refereed]
Undoped (as-grown) ZnO films grown by pulsed laser deposition on Al2O3 (0001) substrates were doped with nitrogen by means of an ion implantation process. Post-implantation annealing behavior in the temperature range between 500 and 700C has been ...
Hidenobu Murata, Takashi Taniguchi, Shunichi Hishita, Tomoyuki Yamamoto, Fumiyasu Oba, Isao Tanaka
JOURNAL OF APPLIED PHYSICS   114(23) 233502-1-233502-4   Dec 2013   [Refereed]
Si-doped cubic boron nitride (c-BN) is synthesized at high pressure and high temperature and the local environment of Si is investigated using X-ray absorption near edge structure (XANES) and first-principles calculations. Si-K XANES indicates tha...
Vinu Ajayan, Srinivasu Pavuluri, Mori Toshiyuki, Sasaki Toshio, Asthana Anjana, Ariga Katsuhiko, Hishita Shunichi
CHEMISTRY LETTERS   36(6) 770-771   Jun 2007   [Refereed]
A novel nitrogen-doped mesoporous carbon with wellordered two-dimensional (2D) structure has been successfully prepared for the first time using aniline as a source for both carbon and nitrogen, and SBA-15 as a template. The above material has bee...
I. Katayama, K. Sato, S. Koga, J. Takeda, S. Hishita, H. Fukidome, M. Suemitsu, M. Kitajima
PHYSICAL REVIEW B   88 245406-1-245406-5   Dec 2013   [Refereed]
Coherent large-wavevector phonons in graphene layers were excited by using a 7.5-fs ultrashort laser, and observed by wavelength-resolved pump-probe transient reflectivity spectroscopy. Inter-Dirac-cone electron scattering mediated by edges and de...
Ohashi Naoki, Takahashi Kenji, Hishita Shunichi, Sakaguchi Isao, Funakubo Hiroshi, Haneda Hajime
JOURNAL OF THE ELECTROCHEMICAL SOCIETY   154(2) D82-D87   Jan 2007   [Refereed]
ZnO microstructures were fabricated by wet-chemical etching with aqueous solutions of HCl and CH3COOH and patterned resist masks prepared by electron beam lithography. Anisotropy of etching rate caused the formation of microstructures correspondin...
JOURNAL OF THE CERAMIC SOCIETY OF JAPAN(日本セラミックス協会学術論文誌)   121(12) 1004-1007   Nov 2013   [Refereed]
We studied the diffusion of Zn in dense SnO2 ceramics by using secondary ion mass spectrometry (SIMS). Dense SnO2 ceramics with additives of 6 mol% MgO and 0.2 mol.% Sb2O5 were synthesized, and Zn was implanted in the SnO2 ceramics by ion implanta...
Aizawa Takashi, Otani Shigeki, Hishita Shunichi
APPLIED PHYSICS LETTERS   89(18) 181913-1-181913-3   Oct 2006   [Refereed]
Plasma-assisted molecular beam epitaxy of GaN and AlN is investigated on a boron-terminated transition-metal diboride (0001) surface: NbB2 (0001). In contrast to metal-terminated ZrB2 (0001), GaN does not grow epitaxially on this surface. Instead,...
JOURNAL OF THE CERAMIC SOCIETY OF JAPAN   121(11) 956-959   Nov 2013   [Refereed]
We investigated the effect of zinc oxide addition for the defects in the dense SnO2 ceramics. Cathode and photoluminescenceproperties revealed the luminescence originated to oxygen vacancies in SnO2 grains and the presence of non-radiative defecta...
Takeshi Ohgaki, Ken Watanabe, Yutaka Adachi, Isao Sakaguchi, Shunichi Hishita, Naoki Ohashi, Hajime Haneda
JOURNAL OF APPLIED PHYSICS   114(9) 093704-1-093704-7   Sep 2013   [Refereed]
Scandium nitride (ScN) films were grown on (100) MgO single crystals by a molecular beam epitaxy method. The effects of growth conditions, including [Sc]/[N] ratio, growth temperature, and nitrogen radical state, on the electrical properties of th...
Isao Sakaguchi, Ken Watanabe, Yutaka Adachi, Takeshi Ohgaki, Shunichi Hishita, Naoki Ohashi, Hajime Haneda
Key Engineering Materials   566 266-270   Jul 2013   [Refereed]
The a-axis oriented ZnO thin films deposited on sapphire substrates by pulsed laser deposition were studied to investigate the effects of pre-annealing on oxygen diffusion. The effect was as follows: the oxygen diffusion coefficient decreased, an...
Ken Watanabe, I. Sakaguchi, S. Hishita, H. Haneda, N. Ohashi
Key Engineering Materials   566 262-265   Jul 2013   [Refereed]
N. Todorova, T. Vaimakis, D. Petrakis, S. Hishita, N. Boukos, T. Giannakopoulou, M. Giannouri, S. Antiohos, D. Papageorgiou, E. Chaniotakis, C. Trapalis
CATALYSIS TODAY   209 41-46   Jun 2013   [Refereed]
N-doped and N,S-codoped titania powders were prepared applying simple chemical treatment with various modifiers. The N and S were introduced preserving the crystalline structure, morphology and specific surface area of the initial TiO2. The level ...
Yasuhiro Kosaki, Hironori Izawa, Shinsuke Ishihara, Kohsaku Kawakami, Masato Sumita, Yoshitaka Tateyama, Qingmin Ji, Venkata Krishnan, Shunichi Hishita, Yusuke Yamauchi, Jonathan P. Hill, Ajayan Vinu, Seimei Shiratori, Katsuhiko Ariga
ACS APPLIED MATERIALS & INTERFACES   5(8) 2930-2934   Apr 2013   [Refereed]
Carbon nanocage-embedded nanofibrous film works as a highly-selective adsorbent of carcinogen aromatic amines. By using quartz crystal microbalance techniques, even ppm levels of aniline can be repetitively detected, while other chemical compounds...
N. Todorova, T. Vaimakis, T. Giannakopoulou, S. Hishita, A. Griniari, E. Varadas, C. Trapalis
NANOSCIENCE AND NANOTECHNOLOGY LETTERS   5(4) 475-479   Apr 2013   [Refereed]
TiO2 powder was synthesized via sol–gel technique. Nitrogen (N) and carbon (C) doped TiO2 powders were prepared applying: (a) thermal treatment of the prepared TiO2 with N, C precursor urea (U); (b) synthesis of TiO2 in presence of N, C cont...
Ikufumi KATAYAMA, Sho KOGA, Jun TAKEDA, Shunichi HISHITA, Daisuke FUJITA, Masahiro KITAJIMA
JOURNAL OF THE CERAMIC SOCIETY OF JAPAN   121(3) 291-294   Mar 2013   [Refereed]
Dynamics of coherent G-mode and D-mode phonons in Ar+-ion implanted graphite has been investigated using transientreflectivity measurement. With an increase in the Ar+-ion dose, coherent D-mode phonon appears at which the dephasing rateof the cohe...
T.T. Suzuki, S. Hishita
APPLIED SURFACE SCIENCE   259 166-171   Oct 2012   [Refereed]
We investigated surface magnetic structure in the initial stage of Si deposition on an Fe(1 0 0) surface byspin-polarized ion scattering spectroscopy (SP-ISS). We found silicidation at the Si/Fe interface after Sideposition followed by annealing a...
Isao Sakaguchi, Ken Watanabe, Shunichi Hishita, Naoki Ohashi, Hajime Haneda
JAPANESE JOURNAL OF APPLIED PHYSICS   51(10) 101801-1-101801-5   Sep 2012   [Refereed]
Oxygen diffusion phenomena in BaTiO3 ceramics doped with Ho of 5.2x1018 /cm3 were studied in order to reveal the effect of reduction thermal annealing. The samples were reduced at 850 ºC in a 3% H2-Ar atmosphere before the oxygen diffusion ex...
K. Yokota, J. Takeda, C. Dang, G. Han, D. N. McCarthy, T. Nagao, S. Hishita, M. Kitajima, I. Katayama
APPLIED PHYSICS LETTERS   100(25) 251605-1-251605-4   Jun 2012   [Refereed]
Dynamical response of surface metallic states in single crystalline ultrathin Bi(001) films on Si(111) 7 7 surface was investigated at a spectral range of 0.1–12 THz by broadband terahertz time-domain spectroscopy. The observed transmittance...
Naoki Fukata, Ryo Takiguchi, Shinya Ishida, Shigeki Yokono, Shunichi Hishita, Kouichi Murakami
ACS NANO   6(4) 3278-3283   Apr 2012   [Refereed]
Recrystallization of silicon nanowires (SiNWs) after ion implantation strongly depends on the ion doses and species. Full amorphization by high-dose implantation induces polycrystal structures in SiNWs even after high-temperature annealing, with t...
Meiyong Liao, Zouwen Rong, Shunichi Hishita, Masataka Imura, Satoshi Koizumi, Yasuo Koide
Diamond and Related Materials   24 69-73   Apr 2012   [Refereed]
Diamond is the ideal material for nanoelectromechanical system (NEMS) switch due to its outstanding properties such as extremely high Young’s modulus, the highest hardness, hydrophobic surface, the highest thermal conductivity, and high corrosion ...
Tsuyoshi Ogino, Naoki Ohashi, Shunichi Hishita, Isao Sakaguchi, Yutaka Adachi, Kunihiko Nakajima, Hajime Haneda
Thin Solid Films   520(10) 3835-3838   Mar 2012   [Refereed]
We are attempting to develop transparent (invisible) waveguide and antenna structures in microwave and millimeter waves range and investigating possible device structure to achieve transparent electronics in GHz range. To our purpose, the most ser...
廖 梅勇, 菱田 俊一, 小泉 聡, 小出 康夫
NEW DIAMOND   104(1) 28-29   Jan 2012   [Refereed]
Isao Sakaguchi, Ken Watanabe, Yutaka Adachi, Takeshi Ohgaki, Shunichi Hishita, Naoki Ohashi, Hajime Haneda
JAPANESE JOURNAL OF APPLIED PHYSICS   50(12) 12550-1-12550-5   Nov 2011   [Refereed]
Aluminum-doped Zinc oxide ceramics were used for studying oxygenself-diffusion by the vapor-solid exchange method. The diffusion profileand the quantitative analysis of impurities (H, Li, Al) were performedby secondary ion mass spectrometry. The c...
T. T. Suzuki, Y. Yamauchi, S. Hishita
PHYSICAL REVIEW LETTERS   107 176101-1-176101-5   Oct 2011   [Refereed]
We investigated electron spin-polarized TexHeTex ion scattering on non-magnetic surfaces with the kinetic energy below 2 keV. We observed that scattered HeTex ion yield differs depending on the HeTex ion spin. We interpret this spin dependent ...
T Ogino, S Sato, N Ohashi, S Hishita, I Sakaguchi, Y Adachi, K Nakajima, T Takenaka, H Haneda
IOP Conference Series: Materials Science and Engineering   18(9) 092051   Sep 2011   [Refereed]
Downsizing of electric components is critical for integration of many functions into mobile electronic devices. Acturally, many modules, such as Bluetooth, digital TV, and GPS etc, are installed in small cell phones in addition to CDMA/GMS modules...
Ikufumi Katayama, Sho Koga, Ken-ichi Shudo, Jun Takeda, Toru Shimada, Atsushi Kubo, Shunichi Hishita, Daisuke Fujita, Masahiro Kitajima
NANO LETTERS   11(7) 2648-2654   Jul 2011   [Refereed]
Ultrafast dynamics of surface-enhanced Raman scattering (SERS) was investigated at cleaved graphite surfaces bearing deposited gold (Au) nanostructures (»10 nm in diameter) by using sensitive pump-probe reflectivity spectroscopy with ultrash...
Takashi Aizawa, Shunichi Hishita, Takaho Tanaka, Shigeki Otani
JOURNAL OF PHYSICS-CONDENSED MATTER   23(30) 305007-1-305007-6   Jul 2011   [Refereed]
A single-crystal surface of W2C(0001) was investigated. A new reconstruction, √13 × √13 R±13.9◦, was found as a clean surface structure. The surface carbon content is shown as larger than that in the bulk. Our preliminary results showed tha...
Tsuyoshi Ogino, Naoki Ohashi, Shunichi Hishita, Isao Sakaguchi, Yutaka Adachi, Kunihiko Nakajima, Hajime Haneda
Key Engineering Materials   485 207-210   Jul 2011   [Refereed]
Ken Watanabe, Isao Sakaguchi, Shunichi Hishita, Naoki Ohashi, Hajime Haneda
APPLIED PHYSICS EXPRESS   4(5) 055801-1-055801-3   Apr 2011   [Refereed]
We performed visualization of the oxygen diffusion path in oxidized and reduced BaTiO3 ceramics by utilizing an ion-imaging technique. The oxygen tracer diffused quickly from the surface up to the grain boundary, and then behaved as discontinuous...
Isao SAKAGUCHI, Takeshi OHGAKI, Yutaka ADACHI, Shunichi HISHITA, Naoki OHASHI, Hajime HANEDA
JOURNAL OF THE CERAMIC SOCIETY OF JAPAN   118(11) 1087-1089   Nov 2010   [Refereed]
The effect of post-annealing on ZnO thin films implanted with Eu of 1x1017 ions/cm2 was studied to characterize the structural, luminescence properties and distribution of Eu in thin film. After the post-annealing at 600ºC, the broadening of...
Meiyong Liao, Shunichi Hishita, Eiichiro Watanabe, Satoshi Koizumi, Yasuo Koide
ADVANCED MATERIALS   22(47) 5393-5397   Oct 2010   [Refereed]
In this work, we demonstrate high-performance all-SCD NEM switches by developing a batch fabrication process for suspended SCD nanowires with well-controlled dimensions and byproposing a lateral device concept. The SCD NEMS switches utilize a uniq...
Takeshi Ohgaki, Ryota Matsuoka, Ken Watanabe, Kenji Matsumoto, Yutaka Adachi, Isao Sakaguchi, Shunichi Hishita, Naoki Ohashi, Hajime Haneda
SENSORS AND ACTUATORS B-CHEMICAL   150(1) 99-104   Sep 2010   [Refereed]
SnO2 thin films were grown on quartz glass substrates using the pulsed laser deposition (PLD) method, and their structures, electric properties, and sensor performances were examined to investigate the sensing mechanism of thin-film gas sensors. S...
Isao Sakaguchi, Kenji Matsumoto, Takeshi Ohgaki, Shunichi Hishita, Yutaka Adachi, Tsubasa Nakagawa, Ken Watanabe, Naoki Ohashi, Hajime Haneda
Key Engineering Materials   445 205-208   Jul 2010   [Refereed]
The relationship between Al and Li during diffusion was studied using Al-implanted ZnO. The Al donor in ZnO acts to increase the concentration of Li contamination from the atmosphere during the annealing. It is difficult to decompose the relatio...
Meiyong Liao, Chun Li, Shunichi Hishita, Yasuo Koide
JOURNAL OF MICROMECHANICS AND MICROENGINEERING   20(8) 085002-1-085002-6   Jun 2010   [Refereed]
The utilization of single crystal diamond offers the route to achieve the extreme semiconductor and mechanical properties of diamond for microelectromechanical system (MEMS). However, the present diamond MEMS devices are limited to polycrystalline...
JOURNAL OF THE CERAMIC SOCIETY OF JAPAN   118(1375) 217-219   Mar 2010   [Refereed]
Silver implantation (75 keV, 2x10^14 ions/cm^2) in ZnO ceramics was carried out at room temperature to characterize the diffusion phenomenon. Annealing caused Ag evaporation from the sample. Results suggest that it is difficult to incorporate Ag...
JOURNAL OF THE CERAMIC SOCIETY OF JAPAN   118(1375) 193-196   Mar 2010   [Refereed]
Akio Kato, Shunichi Hishita, Minoru Osada, Hajime Haneda
SCIENCE AND TECHNOLOGY OF ADVANCED MATERIALS   11(4) 040301-1-040301-1   Feb 2010
Alexei A. Belik, Takao Furubayashi, Yoshitaka Matsushita, Masahiko Tanaka, Shunichi Hishita, Eiji Takayama-Muromachi
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION   48(33) 6117-6120   Aug 2009   [Refereed]
New multiferroic perovskites In1-xMxMO3 with x=0.112-0.176 and M=Fe0.5Mn0.5 were prepared using high-pressure techniques. They have the same structure as BiFeO3 and high Curie temperatures; in addition, they are canted antiferromagnets with N&#233...
Selvaraj Venkataraj, Shunichi Hishita, Yutaka Adachi, Isao Sakaguchi, Kenji Matsumoto, Noriko Saito, Hajime Haneda, Naoki Ohashi
JOURNAL OF THE ELECTROCHEMICAL SOCIETY   156(6) H424-H429   Apr 2009   [Refereed]
Tin-doped zinc oxide, (Zn,Sn)O, films were prepared using a pulsed laser deposition method, to elucidate the effects of Sn doping in ZnO films. The film obtained was <001>-oriented wurtzite type when the Sn concentration was 10% or l...
Kouichi Murakami, Ryota Shirakawa, Masatoshi Tsujimura, Noriyuki Uchida, Naoki Fukata, Shun-ichi Hishita
JOURNAL OF APPLIED PHYSICS   105(5) 054307-1-054307-5   Mar 2009   [Refereed]
We have investigated phosphorus ion P+ implantation in Si nanocrystals embedded in SiO2, in order to clarify the P donor doping effects for photoluminescence of SiNCs in wide P concentrations ranging in three orders. Some types of defects such a...
Takeo Ohsawa, Isao Sakaguchi, Naoki Ohashi, Hajime Haneda, Haruki Ryoken, Kenji Matsumoto, Shunichi Hishita, Yutaka Adachi, Shigenori Ueda, Hideki Yoshikawa, Keisuke Kobayashi
APPLIED PHYSICS LETTERS   94(4) 042104-1-042104-3   Jan 2009   [Refereed]
We studied metastable (Zn1 xMgx)O alloy films having a high MgO fraction, e.g., x = 0.47, in excess of its solubility limit (x ≈ 0.15). Residual electron concentrations in the metastable films were close to those of the stable films having ...
H Amekura, H-S Wang, S Hishita, J Pan, N Kishimoto, Ch Buchal, S Mantl
NANOTECHNOLOGY   20(6) 065303-1-065303-6   Jan 2009   [Refereed]
Regularly-arrayed microstrip regions of ~1.4 um wide and extending up to ~5 mm long, consisting of ZnO nanoparticles of ~50 nm in diameter, were fabricated on silica substrates by two step processes; i.e., selected-area ion implantation and therma...
Ion Beam Synthesis of SiC Thin Films
HISHITA, Shunichi
JOURNAL OF ELECTROCERAMICS   Web 9999-9999   Aug 2008   [Refereed]
This report reviews irradiation effects of 2 MeV He+, Ne+, and Ar+ ions on the film structure of the carbon-film/Si-substrate system. Using ion irradiation, an epitaxial SiC film is grown at atmospheric temperature on a Si substrate. The SiC forma...
T Aizawa, S Suehara, S Hishita, S Otani
JOURNAL OF PHYSICS-CONDENSED MATTER   20(26) 265006-1-265006-4   May 2008   [Refereed]
Surface phonon dispersion of ZrB2(0001)√3×√3(R±30°)-B was measured using high-resolution electron energy loss spectroscopy. With adsorption of excess boron, an ordered structure of √3×√3(R±30°) is found at the B coverage of ca.0.8 monolayers. Anot...
Veeramuthu Vaithianathan, Shunichi Hishita, Jae Young Park, Sang Sub Kim
JOURNAL OF APPLIED PHYSICS   102(8) 086107-1-086107-3   Oct 2007   [Refereed]
ZnO thin films prepared by pulsed laser deposition were implanted with phosphorous (P) using doselevels of 1E12–1E14 ions/cm2 at room temperature. The P-implanted films were subsequentlyannealed between 500 and 700 。・ in oxygen ambient. The ...
V. Balek, D. Li, J. Šubrt, E. Večerníková, S. Hishita, T. Mitsuhashi, H. Haneda
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS   68(5-6) 770-774   May 2007   [Refereed]
Nitrogen and fluorine co-doped titania photocatalyst samples to be used for air purification were prepared by spray pyrolysis using a mixed solution of TiCl4 and NH4F. Morphology and surface activity of the samples prepared at various conditions w...
N. Fukata, S. Sato, H. Morihiro, K. Murakami, K. Ishioka, M. Kitajima, S. Hishita
JOURNAL OF APPLIED PHYSICS   101(4) 046107-1-046107-3   Feb 2007   [Refereed]
The formation of hydrogen (H)-related complexes and H effects on boron (B) and phosphorus (P)dopants was investigated in B- or P-doped silicon (Si) crystal treated with high concentration of H. The reactivation process of dopant carriers by anneal...
羽田 肇, 坂口 勲, 齋藤 紀子, 大橋 直樹, 菱田 俊一
真空 「JOURNAL OF THE VACUUM SOCIETY OF JAPAN」   50(2) 123-127   Feb 2007
Growth of zinc oxide ultra-thin films
菱田 俊一
Material Integration   19(11) 18-21   Nov 2006
(0001) 、(11-20) Al2O3 及び(0001) ZrB2基板上での酸化亜鉛超薄膜の室温形成についてMBE法により検討した。ZrB2単結晶はエピタキシャル酸化亜鉛薄膜の形成のための基板結晶として有効であった。
Doping of As, P and N in laser deposited ZnO films
Veeramuthu Vaithianathan, Yong Hee Lee, Byung-Teak Lee, Shunichi Hishita, Sang Sub Kim, V. Vaithianathan, Y. H. Lee, B. T. Lee, HISHITA, Shunichi, S. S. Kim
JOURNAL OF CRYSTAL GROWTH   287(1) 85-88   Jan 2006   [Refereed]
Preparation of p-type ZnO thin films on Al2O3 (0 0 0 1) substrates is reported, which involves two different p-type dopant sourcematerials such as Zn3As2 and Zn3P2 for As and P doping, respectively, during pulsed laser deposition, while an ion imp...
Ryoken Haruki, Sakaguchi Isao, Ohashi Naoki, Adachi Yutaka, Ohgaki Takeshi, Hishita Shunichi, Haneda Hajime
ELECTROCERAMICS IN JAPAN IX   320 103-106   2006   [Refereed]
N. Fukata, S. Fukuda, S. Sato, K. Ishioka, M. Kitajima, T. Hishita, K. Murakami
PHYSICAL REVIEW B   72(24) 245209-1-245209-8   Dec 2005   [Refereed]
Atsuko Nakayama, Takashi Taniguchi, Yoichi Kubota, Kenji Watanabe, Shunichi Hishita, Hisao Kanda
APPLIED PHYSICS LETTERS   87(21) 211913-1-211913-3   Nov 2005   [Refereed]
Ajayan Vinu, Mauricio Terrones, Dmitri Golberg, Shunichi Hishita, Katsuhiko Ariga, Toshiyuki Mori
CHEMISTRY OF MATERIALS   17(24) 5887-5890   Nov 2005   [Refereed]
Mesoporous BN, and BCxN with different carbon contents have been prepared for the first time using mesoporous carbon as a template. High-resolution transmission electron microscopy (HRTEM), electron energy loss spectroscopy (EELS), scanning electr...
Di Li, Naoki Ohashi, Shunichi Hishita, Taras Kolodiazhnyi, Hajime Haneda
JOURNAL OF SOLID STATE CHEMISTRY   178(11) 3293-3302   Nov 2005   [Refereed]
An overall comparative study was carried out on N-doped, F-doped, and N-F-codoped TiO2 powders (NTO, FTO, NFTO) synthesized by spray pyrolysis in order to elucidate the origins of their visible-light-driven photocatalysis. The comparisons in their...
Haruki Ryoken, Isao Sakaguchi, Naoki Ohashi, Takashi Sekiguchi, Shunichi Hishita, Hajime Haneda
JOURNAL OF MATERIALS RESEARCH   20(10) 2866-2872   Oct 2005   [Refereed]
Zinc oxide (ZnO) films doped with aluminum (Al) were deposited with a pulsed laser deposition technique to characterize the charge compensation phenomena in ZnO. Particularly, oxygen radical (O*) irradiation during film deposition was used to modi...
Isao Sakaguchi, Yoshiyuki Sato, Haruki Ryoken, Syunichi Hishita, Naoki Ohashi, Hajime Haneda
JAPANESE JOURNAL OF APPLIED PHYSICS   44(41) L1289-L1292   Sep 2005   [Refereed]
Combinatorial ion implantation techniques with mask and digital scanning systems were applied to optimize conditions of the optimal Eu dose for the orange luminescence originating from Eu phosphor in ZnO thin films. Eu ions accelerated to 150 keV...
D. Li, V. Balek, N. Ohashi, T. Mitsuhashi, S. Hishita, H. Haneda
JOURNAL OF COLLOID AND INTERFACE SCIENCE   289(2) 472-478   Sep 2005   [Refereed]
This paper describes a unique phenomenon occurred during the calcination of ZnO powders, i.e., the ZnO particles self-assembled to form prismatic aggregates with a clear edges and faces. Field-emission scanning electron microscopy (FE-SEM) and X-r...
Di Li, Hajime Haneda, Naoki Ohashi, Noriko Saito, Shunichi Hishita
THIN SOLID FILMS   486 20-23   Aug 2005   [Refereed]
Morphological reform of originally prismatic ZnO particles was observed during the coupling process with MOx (M=V,W,Ce) precursor by impregnation. The prismatic morphology of ZnO particles transferred to sheet shape morphology during coupling with...
菱田 俊一
セラミックス   40(8) 661-666   Aug 2005
S.-Z. Chu, S. Inoue, K. Wada, S. Hishita, K. Kurashima
ADVANCED FUNCTIONAL MATERIALS   15(8) 1343-1349   Aug 2005   [Refereed]
We report a new method to fabricate self-organized nanoporous titania films (pore diameter 30 nm; 1100 nm thick) and ordered titania nanorod arrays (rod diameter 30-60 nm; 70-260 nm high) by combined anodizing of superimposed Al/Ti layers sputter-...
A. Vinu, K. Ariga, T. Mori, T. Nakanishi, S. Hishita, D. Golberg, Y. Bando
ADVANCED MATERIALS   17(13) 1648-1652   Jul 2005   [Refereed]
This paper describes the preparation of the highly ordered mesoporous carbon nitride material having uniform pore size distribution through the simple polymerization reaction between ethylenediamine and carbon tetrachloride. This obtained material...
S. Z. Chu, S. Inoue, K. Wada, S. Hishita, K. Kurashima
JOURNAL OF THE ELECTROCHEMICAL SOCIETY   152(3) B116-B124   Jun 2005   [Refereed]
Self-organized anodic titania nanostructures (nanoporous films, nanodot or nanorod arrays) were fabricated by a combined anodization from superimposed Al/Ti layers sputter-deposited on glass substrates. The specimens were first anodized in a const...
Isao Sakaguchi, Haruki Ryoken, Yoshiyuki Sato, Syunichi Hishita, Naoki Ohashi, Noriko Saito, Hajime Haneda
JAPANESE JOURNAL OF APPLIED PHYSICS   44(24) L770-L773   Jun 2005   [Refereed]
Di Li, Hajime Haneda, Shunichi Hishita, Naoki Ohashi
CHEMISTRY OF MATERIALS   17(10) 2588-2595   May 2005   [Refereed]
Novel photocatalytic materials, yellow-colored N-F-codoped TiO2 (NFT) powders, were synthesized from a mixed aqueous solution containing TiCl4 and NH4F by spray pyrolysis (SP). The resulting powders were characterized by field-emission scanning el...
Visible-Light-Active Nitrogen-Containing TiO2 Photocatalysts Prepared by Spray Pyrolysis Technique
LI, DI, HANEDA, Hajime, HISHITA, Shunichi, OHASHI, Naoki
RESEARCH ON CHEMICAL INTERMEDIATES   31(4) 331-341   May 2005   [Refereed]
Yellow-colored N-containing TiO2 (NTO) powders with a porous surface were synthesized by spray pyrolysis. Their nitrogen contents depended on pyrolysis temperature and ranged from 300 to 5700 ppm. Ultraviolet-visible spectra indicated that the NTO...
Shunichi Hishita, Isao Sakaguchi, Naoki Ohashi, Noriko Saito, Hajime Haneda
Atomic force microscopy (AFM) and X-ray diffraction (XRD) analysis have been used to characterize ion-irradiated-and-annealed surface structures of Pt thin films deposited on SiO2 glass substrates. The surface morphology of the Pt films is found t...
Di Li, Hajime Haneda, Shunichi Hishita, Naoki Ohashi
CHEMISTRY OF MATERIALS   17(10) 2596-2602   May 2005   [Refereed]
N-F-codoped TiO2 (NFT) powders, prepared by spray pyrolysis (SP), were further characterized by ultraviolet-visible (UV-VIS) absorption spectroscopy and photoluminescence (PL) spectra. The UV-VIS spectra indicated that the NFT powders could absorb...
Takashi Aizawa, Shigeru Suehara, Shunichi Hishita, Shigeki Otani, Masao Arai
PHYSICAL REVIEW B   71(16) 165405-1-165405-9   Apr 2005   [Refereed]
Core levels of NbB2(0001) and ZrB2(0001) were measured by XPS. Large surface core level shift is observed in the B 1s on NbB2. By an ab initio DFT calculation, this shift is well reproduced. It reflects not the total charge but the local charge de...
Di Li, Hajime Haneda, Shunichi Hishita, Naoki Ohashi
Yellow-colored N-doped TiO2 (NTO) powders were synthesized by spray pyrolysis from a mixed aqueous solution containing TiCl4 and an N-precursor (urea, guanidine, or ammonium fluoride). All resulting powders possessed spherical particles with an av...
Isao Sakaguchi, Syunichi Hishita, Haruki Ryoken, Yoshiyuki Sato, Hajime Haneda
SURFACE AND INTERFACE ANALYSIS   37 332-335   Jan 2005   [Refereed]
Di Li, Hajime Haneda, Shunichi Hishita, Naoki Ohashi, Nitin K. Labhsetwar
JOURNAL OF FLUORINE CHEMISTRY   126 69-77   Jan 2005   [Refereed]
F-doped TiO2 (FTO) powders were synthesized by spray pyrolysis (SP) from an aqueous solution of H2TiF6. The resulting FTO powders possessed spherical particles with a rough surface morphology and a strong surface acidity. The fluorine concentratio...
Di Li, Hajime Haneda, Nitin K. Labhsetwar, Shunichi Hishita, Naoki Ohashi
CHEMICAL PHYSICS LETTERS   401 579-584   Jan 2005   [Refereed]
F-doped TiO2 (FT) powders were prepared by spray pyrolysis from an aqueous solution of H2TiF6. These FT powders demonstrated very high visible-light (Vis) photocatalytic activities for decompositions of both acetaldehyde and trichloroethylene, alt...
S. Suehara, P. Thomas, A. P. Mirgorodsky, T. Merle-Méjean, J. C. Champarnaud-Mesjard, T. Aizawa, S. Hishita, S. Todoroki, T. Konishi, S. Inoue
PHYSICAL REVIEW B   70(20)    Nov 2004   [Refereed]
We present an ab initio molecular orbital theoretical approach to the origin of nonlinear optical (NLO) properties in the TeO2-based materials from the viewpoint of "electron pairs" assigned to the individual chemical bond. Localized static dipole...
APPLIED SURFACE SCIENCE   237 358-362   Oct 2004   [Refereed]
New ion implantation techniques were used to study phenomena related to emission in ZnO thin films implanted with Cu. Room temperature Cu implantation was at 125 keV, in a Cu dose range of 1x10(12) – 2x10(14) ions/cm^2. The intensity of band...
Shunichi Hishita, Zdenek Stryhal, Isao Sakaguchi, Naoki Ohashi, Noriko Saito, Hajime Haneda
THIN SOLID FILMS   (1) 146-149   Oct 2004   [Refereed]
Atomic force microscopy (AFM) and X-ray diffraction (XRD) have been used to characterize surface structures of Sn thin films grown on SiO2 glass substrates. The surface morphology of the Sn thin films is found to be strongly dependent on the film ...
S. Suehara, P. Thomas, A. Mirgorodsky, T. Merle-Méjean, J.C. Champarnaud-Mesjard, T. Aizawa, S. Hishita, S. Todoroki, T. Konishi, S. Inoue
JOURNAL OF NON-CRYSTALLINE SOLIDS   730-733   Oct 2004   [Refereed]
Ab initio calculations of the nonlinear optical properties for the TeO4 and TeO3 structural units in TeO2-based glasses are presented. Time-dependent Hartree-Fock calculation shows that the shorter wavelength of the light injected should lead to t...
Di Li, Hajime Haneda, Naoki Ohashi, Shunichi Hishita, Yukio Yoshikawa
CATALYSIS TODAY   895-901   Sep 2004   [Refereed]
Nanosized N-containing MOx&#8211;ZnO (M = W, V, Fe) composite powders were synthesized by spray pyrolysis. These powders were orange in color and absorbed not only ultraviolet light (λ < 387 nm) like pure ZnO powder did, but also part of the visib...
Isao Sakaguchi, Syunichi Hishita, Hajime Haneda
JAPANESE JOURNAL OF APPLIED PHYSICS   43 5562-5563   Aug 2004   [Refereed]
Isao Sakaguchi, Syunichi Hishita
SURFACE AND INTERFACE ANALYSIS   36(7) 645-648   Jul 2004   [Refereed]
Isao Sakaguchi, Yoshiyuki Sato, Daechul Park, Naoki Ohashi, Hajime Haneda, Syunichi Hishita
Hiroshi Nozaki, Mitsuko Onoda, Ken Yukino, Keiji Kurashima, Kousuke Kosuda, Hideyuki Maki, Shunichi Hishita
JOURNAL OF SOLID STATE CHEMISTRY   177 1165-1172   Apr 2004   [Refereed]
硫化銀のエピタキシャル膜をMgO(001)の研磨面および劈開面上に作製し、X線回折法により配向を決定した。いずれの場合でも(012),(-1,1,2),(010)が基板面に平行である。これらのうち前二者の結晶粒の面内配向を双晶を含めて決定した。双晶は高温相の立方晶が 低温相の単斜相に転移する際に必然的に生成されるものである。従来、 電子線回折法により、(012)粒子の結晶配向のみが報告されてきた。
S. Hishita, A. Nukui, S. Inoue, S. Suehara, T. Aizawa
EUROPEAN PHYSICAL JOURNAL B   38 111-115   Mar 2004   [Refereed]
Surface structures in the Te/Ni(111) system are revealed by using reflection high-energy electron diffraction combined with x-ray and ultraviolet photoelectron spectroscopies. At a 0.33 mono-layer(ML)- Te/Ni(111) surface, a reversible structural p...


菱田俊一, 三石和貴, 北澤英明, 藤田大介
日本セラミックス協会年会講演予稿集(CD-ROM)   2018 ROMBUNNO.1P155   Mar 2018
坂口勲, 齋藤紀子, 安達裕, 渡邉賢, 鈴木拓, 菱田俊一
日本セラミックス協会秋季シンポジウム講演予稿集(CD-ROM)   28th ROMBUNNO.2PS01   Sep 2015
K. Yokota, J. Takeda, C. Dang, G. Han, D. N. McCarthy, T. Nagao, S. Hishita, M. Kitajima, I. Katayama
Applied Physics Letters   107    Aug 2015
Yutaka Adachi, Noriko Saito, Minako Hashiguchi, Isao Sakaguchi, Taku Suzuki, Naoki Ohashi, Shunichi Hishita
Journal of the Ceramic Society of Japan   122 908-913   Oct 2014
©2014 The Ceramic Society of Japan. All rights reserved. WxZn1-xO films with various doping concentration were prepared using pulsed laser deposition (PLD) on the (112¯0) face of sapphire. The c-axis-oriented WxZn1-xO films were grown without in-p...
坂口勲, 橋口未奈子, 渡邉賢, 齋藤紀子, 鈴木拓, 菱田俊一
日本鉱物科学会年会講演要旨集   2014 34   Sep 2014

Research Grants & Projects

Grain boundary characterizations of electronic ceramics Preparation of semi- or super conducting oxide materials Interactions between energenic ions and materials