Search Results:　 1-20 of 1217

Hiramatsu Mineo , Nihashi Yuki , Kondo Hiroki , Hori Masaru

… Carbon nanowalls (CNWs), a self-organized network of vertically standing few-layer graphenes, were synthesized by inductively coupled plasma-enhanced chemical vapor deposition (ICP-CVD) employing methane and argon mixtures. … We have investigated the early growth stage of CNWs on the catalyst-free substrate and the titanium (Ti)-nanoparticle-catalyzed substrate. …

Jpn J Appl Phys 52(1), 01AK05-01AK05-6, 2013-01-25

The Japan Society of Applied Physics

Lu Jing , Hu Yan-Ling , Brown David F. , Wu Feng , Keller Stacia , Speck James S. , DenBaars Steven P. , Mishra Umesh K.

… In this paper, we investigated the Ga incorporation effect in InAl(Ga)N/Al(Ga)N/GaN heterojunctions grown by a close coupled showerhead metal--organic chemical vapor reactor and proposed a grading growth strategy, where the indium composition was graded from Al(Ga)N to InAl(Ga)N, to mitigate the deleterious effect of Ga carry-over on the transport properties of two dimensional electron gas (2DEG). …

Jpn J Appl Phys 51(11), 115502-115502-4, 2012-11-25

The Japan Society of Applied Physics

Ma ShaoJun , Sodabanlu Hassanet , Watanabe Kentaroh , Sugiyama Masakazu , Nakano Yoshiaki

… By high-accuracy in situ curvature measurement during the growth of InGaAs/GaAsP superlattice structures by metal organic vapor phase epitaxy, we have successfully observed the effect of thin GaAs insertion layers between InGaAs wells and GaAsP barriers on strain control. … By analyzing curvature transients, we found that an inadequate gas-switching sequence induces the carry over of indium from the InGaAs layer to the overlying GaAs insertion layer. …

Jpn J Appl Phys 51(10), 10ND09-10ND09-3, 2012-10-25

The Japan Society of Applied Physics

Sodabanlu Hassanet , Ma Shaojun , Watanabe Kentaroh , Sugiyama Masakazu , Nakano Yoshiaki

… The crystal growth was done by a planetary metalorganic vapor phase epitaxy (MOVPE) reactor. … It was shown by calculation that the carrier transports across the MQWs region suffered from decrease in built-in electric field in absorber layers, leading to an efficiency loss by radiative and nonradiative recombinations. … Reactor baking at 850 °C for 20 min seems to remove Zn residues effectively without noticeable effects on the succeeding growth of MQW solar cells. …

Jpn J Appl Phys 51(10), 10ND15-10ND15-4, 2012-10-25

The Japan Society of Applied Physics

Yoshikawa Shohei , Saegusa Tomomitsu , Iwane Yuto , Yamauchi Masayuki , Shimomura Kazuhiko

… Flat-topped emission with a spectral width greater than 500 nm was obtained from self-assembled Stranski--Krastanov (SK) InAs/InP quantum dots (QDs) grown by selective area low-pressure metal organic vapor phase epitaxy using a double-capping procedure. … Selective area growth using an SiO2 mask with narrow stripes was carried out to tailor a wide emission range for the QDs in sixteen arrayed waveguides. …

Applied Physics Express 5(9), 092103-092103-3, 2012-09-25

The Japan Society of Applied Physics

Piao Jinchun , Katori Shigetaka , Kawaharamura Toshiyuki , Li Chaoyang , Fujita Shizuo

… Silicon oxide thin films were grown from the liquid source, polysilazane, by using mist chemical vapor deposition (CVD) at temperatures of 200--350 °C. … The films were grown with a reasonable growth rate of 12 nm/min at the temperature of 200 °C, and they showed resistivity of the order of 10^{13} \Omega\cdotcm, although the incorporation of carbon and oxygen remains as a problem to be discussed and solved in the future. …

Jpn J Appl Phys 51(9), 090201-090201-3, 2012-09-25

The Japan Society of Applied Physics

Miyata Yasumitsu , Maeda Eriko , Kamon Keiichi , Kitaura Ryo , Sasaki Yuki , Suzuki Shoji , Shinohara Hisanori

… The synthesis of graphene and hexagonal boron nitride (hBN) hybrid sheets has been achieved using a two-step chemical vapor deposition (CVD) process. … Individual grains of single-layer graphene are grown from methane, and hBN is, then, synthesized from ammonia borane on the same copper (Cu) foil. … Furthermore, the hBN growth is found to be initiated preferentially by the edge of graphene grains. …

Applied Physics Express 5(8), 085102-085102-3, 2012-08-25

The Japan Society of Applied Physics

Sasaki Takuya , Tamegai Yukihiro , Ueno Takahiro , Watanabe Mitsuhiro , Jin Lianhua , Kondoh Eiichi

… In this paper, we report in-situ spectroscopic ellipsometry of Cu deposition from supercritical carbon dioxide fluids. … The motivations of this work were 1) to perform a detailed observation of Cu growth with precision optical metrology, 2) to study substrate dependence on Cu growth, particularly for Ru and TiN substrates in the present case, and 3) to demonstrate the possibility and usefulness of ellipsometry for diagnosing supercritical fluid processing. …

Jpn J Appl Phys 51(5), 05EA02-05EA02-11, 2012-05-25

The Japan Society of Applied Physics

Ago Hiroki , Kayo Yasumichi , Tsuji Masaharu

… We report the growth of single-walled carbon nanotubes (SWNTs) over metal nanoparticles which are formed by scratching sapphire surface with metal wires. … The chemical vapor deposition over sapphire substrate scratched with Fe and Co metal wires gives horizontally aligned SWNTs, while no nanotube growth is observed for Au, Mo, and Ni wires. …

Jpn J Appl Phys 51(4), 04DN02-04DN02-4, 2012-04-25

The Japan Society of Applied Physics