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Photochemical modification of diamond powders with elemental sulfur and their surface-attachment behavior on gold surfaces.

• Takako Nakamura, Tsuguyori Ohana, Yuta Hagiwara, Toshiki Tsubota
• Physical chemistry chemical physics : PCCP
• 2009

A useful method of modifying the surface of diamond powder with sulfur-containing functionalities was developed by the photolysis of elemental sulfur. The introduction of sulfur-containing functional… (More)

Practical and convenient synthesis of coumarins from phenols and propiolic acid esters

• Tsugio Kitamura, Juzo Oyamada, Toshiki Tsubota
• Nature Protocols
• 2007

This protocol describes the synthesis of 6,7-methylenedioxy-4-phenylcoumarin from sesamol and ethyl phenylpropiolate using a Pd(OAc)2 catalyst to illustrate coumarin synthesis. This procedure is… (More)

Partial Delignification as Pretreatment for Nanoporous Carbon Material from Biomass.

• Toshiki Tsubota, Daisuke Nagata, Sunao Kamimura, Teruhisa Ohno
• Journal of nanoscience and nanotechnology
• 2017

For the pretreatment in order to nano prepare porous carbon from biomass such as bamboo, a mixture of acetic acid and hydrogen peroxide was used for the partial delignification of bamboo. The… (More)

Direct Synthesis of Graphene Layer Covered Micro Channel on Diamond Surface Using Ni Wire.

• Toshiki Tsubota, Akihiro Morioka, Yuta Osoekawa, Motoi Nakao
• Journal of nanoscience and nanotechnology
• 2018

In order to propose a new simple method for the fabrication of a microchannel covered with a graphene layer on a diamond substrate, the application of a phase transition via a solid solution… (More)

Improvement of electrical conductivity while maintaining a high-transmittance of graphene oxide/MWCNT film by hydrazine reduction.

• Shota Mihara, Toshiki Tsubota, Naoya Murakami, Teruhisa Ohno
• Journal of nanoscience and nanotechnology
• 2012

In this study, we attempted to synthesize a transparent electrode with a composite of along graphene with multi-walled carbon nanotubes (MWCNT). Hydrazine was used for the reduction process. After… (More)

Improvement of visible light photocatalytic acetaldehyde decomposition of bismuth vanadate/silica nanocomposites by cocatalyst loading.

• Naoya Murakami, Naohiro Takebe, Toshiki Tsubota, Teruhisa Ohno
• Journal of hazardous materials
• 2012

Photocatalytic activity of bismuth vanadate (BiVO(4)) for acetaldehyde decomposition under visible light irradiation was improved by inclusion of a nanocomposition of silica as an adsorbent material… (More)

Thermoelectric prperties of Sn 1x-yTiySbxO 2 ceramics

• Toshiki Tsubota, Teruhisa Ohno, Norihisa Shiraishi, Yuji Miyazaki
• 2009

Thermoelectric properties of Sn1-x-yTiy SbxO2 ceramics were investigated in detail. The addition of Sb into SnO2 matrix increased the electric conductivity, σ. The increase in the σ value should be… (More)

Development of a titania nanotube ( TNT ) loaded site-selectively with Pt nanoparticles and their photocatalytic activities

• Kazumoto Nishijima, Takayuki Fukahori, Naoya Murakami, Toshiki Tsubota, Teruhisa Ohno
• 2007

Attempt of Deposition of Ag-Doped Amorphous Carbon Film by Ag-Cathode DC Plasma with CH4 Flow.

• Toshiki Tsubota, Kazuhiro Kuratsu, Naoya Murakami, Teruhisa Ohno
• Journal of nanoscience and nanotechnology
• 2015

A simple DC plasma apparatus having large Ag cathode with CH4 flow was used for the attempt to prepare Ag-doped amorphous carbon film. As the gaseous source, CH4 and the additive (N2 or Ar) were used… (More)

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