document.write( "<CENTER><TABLE WIDTH=100% BORDER=1 CELLPADDING=5 CELLSPACING=0 BORDERCOLOR=#663333><TR BGCOLOR=#663333><TD HEIGHT=30 ALIGN=right><FONT COLOR=white SIZE=+1>Today's Paper</FONT>　<FONT COLOR=lightgrey> published (online)/received/accepted/etc on March 31 （8 publications）《WoS citation》<INPUT TYPE=button VALUE='Publication Page' ONCLICK=location.href='/cgi-bin/publication/db_publication_e.cgi?check_05=CHECKED&order=descent&showCitation=CHECKED'></FONT></TD></TR></TABLE></CENTER><CENTER><TABLE WIDTH=100% BORDER=1 CELLPADDING=3 CELLSPACING=0 BORDERCOLOR=#663333 TITLE='Titanium(IV) oxide  (TiO2) powders were prepared by hydrolysis of titanium(IV) tetra-2-propoxide and subsequent calcination at various temperatures Tc up to 1073 K. The transformation of crystal structure from anatase to rutile was observed at Tc〜873 K along with a drastic decrease in specific surface area. This led to a decrease in the amount of both surface hydroxyls and Ag+ adsorbed ([Ag+]ad) from an aqueous silver nitrate solution.  For each powder, [Ag+]ad increased with pH of the suspension. Deposition of silver metal onto the TiO2 surface and evolution of molecular oxygen (O2) were observed by photoirradiation (at greater than 300 nm) on TiO2 suspended in a silver sulfate solution at room temperature. The overall stoichiometry of [4Ag+ + 2H2O = 4Ag + O2 + 4H+] was obtained from the results of irradiation of 1 h for each TiO2 powder. The initial rate of this photocatalytic reaction was evaluated from the amount of photodeposited silver during several photoirradiation durations of less than 5 min, and compared with [Ag+]ad. The lower photocatalytic activity of TiO2 of lower Tc, despite larger [Ag+]ad, was caused by the significant surface recombination of photoexcited electrons and positive holes, depressing the substantial rate of reduction of adsorbed Ag+.'><TR BGCOLOR=#663333><TD COLSPAN= VALIGN=middle popup_e> <SPAN CLASS=large><FONT COLOR=white><A NAME=''></A>■ ADS・1992 (full paper)　《65》 MECHAN［published 1992/03/31］</FONT> </SPAN></TD></TR><TR><TD VALIGN=middle BGCOLOR=#FFFFDD><B>Ohtani, B.</B>; Zhang, S.-W.; Handa, J.-i.; Kajiwara, H.; Nishimoto, S.-i.; Kagiya, T., Photocatalytic Activity of Titanium(IV) Oxide Prepared from Titanium(IV) Tetra-2-propoxide: Reaction in Aqueous Silver Salt Solutions, <I>J. Photochem. Photobiol. A: Chem.</I>, <B>64</B>, 223-230 (1992).* [<A HREF='http://dx.doi.org/10.1016/1010-6030(92)85109-8'>DOI</A>] ●さまざまな温度で焼成することによって調製した酸化チタン光触媒の活性が，暗時の銀イオン吸着量により支配されることを明らかにした．</TD></TR></TABLE></CENTER><CENTER><TABLE WIDTH=100% BORDER=1 CELLPADDING=3 CELLSPACING=0 BORDERCOLOR=#663333 TITLE='The emission spectrum of CdSe/ZnS quantum dots adhering to the surface of a microsphere resonator is measured and discussed. Only certain peaks are observed, and the order numbers of the modes (l=5 to 7) of the observed peaks are different from those previously reported (l=1 and 2). [Nano Lett. 1 (2001) 399]. A detailed analysis is presented using the cavity mode efficiency φ, which is a function of surface roughness, the absorption coefficient of the quantum dots, and mode parameters. The difference between the observed order number modes is explained to be due to the ratio of the rate of absorption by the quantum dots to that of the leakage rates of the modes. The surface roughness of a quantum-dot-coated microsphere and the absorption coefficient of the quantum dots on the sphere are estimated in the analysis.'><TR BGCOLOR=#663333><TD COLSPAN= VALIGN=middle popup_e> <SPAN CLASS=large><FONT COLOR=white><A NAME=''></A>■ TKS・2006 (full paper)　《1》 OTHERS［received 2006/03/31］</FONT><IMG SRC='/image/misc/freeDL.png' HEIGHT=15 VARIGN=bottom> </SPAN></TD></TR><TR><TD VALIGN=middle BGCOLOR=#FFFFDD>Takashima, H.*; Fujiwara, H.; Hotta, J.-i.; Takeuchi, S.; Sasaki, K.; <B>Murakami, S.-y.</B>; <B>Torimoto, T.</B>; <B>Ohtani, B.</B>, Analysis of Quantum Dot Fluorescence Coupled with a Microsphere Resonator, <I>Jpn. J. Appl. Phys.</I>, <B>45-1</B>, 6917-6921 (2006).* [<A HREF='http://dx.doi.org/10.1143/JJAP.45.6917'>DOI</A>]</TD></TR></TABLE></CENTER><CENTER><TABLE WIDTH=100% BORDER=1 CELLPADDING=3 CELLSPACING=0 BORDERCOLOR=#663333 TITLE='Electron-hole recombination in nano-sized titanium(IV) oxide (TiO2) particles with various physical properties, which have been shown to be highly active photocatalysts, was evaluated by quantitative analysis of reduced titanium species (Ti3+), which might be formed at crystalline defective sites in TiO2 particles through photo-irradiation in the presence of a hole scavenger under deaerated conditions. These highly active photocatalyst samples were synthesized by hydrothermal crystallization in organic media (HyCOM method) and post-calcination. The Ti3+ density decreased with increasing calcination temperature (T c), and a linear correlation was observed between the Ti3+ density and rate constant for electron-hole recombination evaluated by femtosecond pump-probe diffuse reflection spectroscopy. Reaction rate (R Ag) and the amount of silver ions (Ag+) adsorbed on TiO2 particles ([Ag+]ads) were measured for photocatalytic silver metal deposition along with oxygen formation from an aqueous Ag+ solution under deaerated conditions, and the slope of the R Ag versus [Ag+]ads plot was determined. Kinetic investigation of this reaction showed that the reciprocal of the slope was approximately related to the ratio of the rates for electron-hole recombination and electron trapping (k r/k e ratio). The k r/k e ratio decreased as T c increased, and the logarithm of the k r/k e ratio was linearly related with Ti3+ density. These two parameters were used as a measure for the recombination properties of TiO2 photocatalysts with various physical properties.'><TR BGCOLOR=#663333><TD COLSPAN= VALIGN=middle popup_e> <SPAN CLASS=large><FONT COLOR=white><A NAME=''></A>■ MKM・2007 (full paper)　《52》 ETRAPD［accepted 2006/03/31］</FONT> <IMG SRC='/image/misc/huscap.png' HEIGHT=15 VARIGN=bottom></SPAN></TD></TR><TR><TD VALIGN=middle BGCOLOR=#FFFFDD><B>Murakami, S.-y.</B>; Kominami, H.*; Kera, Y.; <B>Ikeda, S.</B>; Noguchi, H.; Uosaki, K.; <B>Ohtani, B.</B>, Evaluation of electron-hole recombination properties of titanium(IV) oxide particles with high photocatalytic activity, <I>Res. Chem. Interm.</I>, <B>33</B>, 285-296 (2007).* [<A HREF='http://dx.doi.org/10.1163/156856707779238612'>DOI</A>] [<A HREF='http://hdl.handle.net/2115/48672'>HUSCAP</A>] ●水のかわりに有機溶媒をつかう高温加圧合成法であるソルボサーマル法により合成した高活性酸化チタン光触媒の再結合挙動をフェムト秒ポンプ―プローブ測定により解析し，活性が高いものほど再結合が遅いことをしめした．三価チタン種密度を光化学法により定量し，光触媒の非表面積に対して直線的に増加すること，および，トラップ電子の減衰速度定数と相関があることを見いだした．</TD></TR></TABLE></CENTER><CENTER><TABLE WIDTH=100% BORDER=1 CELLPADDING=3 CELLSPACING=0 BORDERCOLOR=#663333 TITLE='A racemic amphiphilic monomer, n-dodecyl glyceryl itaconate (DGI), forms bilayer membranes in water in the presence of small amount of ionic cosurfactant and shows iridescent color. A chiral DGI, S-DGI, also shows an iridescent property, but with a rather red shift in the color, which can be ascribed to the increased packing density of the monomer in the bilayer membranes. Chrial DGI has a more compact packing density than racemic one owing to closer distance between the monomer molecules; the conversion rate, however, is slower than that of racemic one when H2O2 is used as an initiator. When the initiator is changed to an amphiphilic one, 4-(2-hydroxyethoxy) phenyl-(2-hydroxy-2-propyl) ketone (Irgacure 2959), the chiral DGI shows even a little faster conversion rate than that of racemic one. The NMR chemical shift results of protons in benzene ring show that the molecules of Irgacure 2959 insert into the bilayer membranes. The molecular weights of the corresponding polymers prove that the initiation by H2O2 is restricted compared to that by Irgacure 2959. It is concluded that the decelerated polymerization behavior of chiral DGI initiated by H2O2 is a result of limited diffusion of the initiator into the lamellar bilayer structures.'><TR BGCOLOR=#663333><TD COLSPAN= VALIGN=middle popup_e> <SPAN CLASS=large><FONT COLOR=white><A NAME=''></A>■ TSU・2007 (article)　《4》 OTHERS［received 2007/03/31］</FONT> </SPAN></TD></TR><TR><TD VALIGN=middle BGCOLOR=#FFFFDD>Chen, X.; Matsuo, G.; <B>Ohtani, B.</B>; Tsuji, K., Polymerization Behaviors of Racemic and Chiral Amphiphilic Monomers in Organized Bilayer Membranes of Lamellar Liquid Crystalline Phase, <I>J. Polym. Sci. Part A: Polym. Chem.</I>, <B>45</B>, 4891-4900 (2007).* [<A HREF='http://dx.doi.org/10.1002/pola.22240'>DOI</A>]</TD></TR></TABLE></CENTER><CENTER><TABLE WIDTH=100% BORDER=1 CELLPADDING=3 CELLSPACING=0 BORDERCOLOR=#663333 TITLE='Efficient photoanodes of tungsten oxide (WO3) were fabricated on three-dimensional conductive carbon microfiber felts (CMFs). Monolayers of fine WO3 particles with a diameter of ca. 150 nm were successfully loaded on the surface of CMFs by simple impregnation of a mixed aqueous solution of ammonium metatungstate and poly(ethylene glycol) followed by calcination in air, affording higher photocurrent densities and IPCE values for water oxidation under visible light than those on a conventional porous WO3 electrode prepared on a conductive glass substrate.'><TR BGCOLOR=#663333><TD COLSPAN= VALIGN=middle popup_e> <SPAN CLASS=large><FONT COLOR=white><A NAME=''></A>■ HOMUR・2014 (letter)　《10》 VISIBL_A［received 2014/03/31］</FONT> </SPAN></TD></TR><TR><TD VALIGN=middle BGCOLOR=#FFFFDD><B>Homura, H.</B>; <B>Ohtani, B.</B>; <B>Abe, R.</B>, Facile Fabrication of Photoanodes of Tungsten(VI) Oxide on Carbon Microfiber Felts for Efficient Water Oxidation under Visible Light, <I>Chem. Lett.</I>, <B>43</B>, 1195-1197 (2014).* [<A HREF='http://dx.doi.org/10.1246/cl.140320'>DOI</A>] ●電気伝導性炭素繊維に担持させた酸化タングステン(VI)による光アノード反応の速報</TD></TR></TABLE></CENTER><CENTER><TABLE WIDTH=100% BORDER=1 CELLPADDING=3 CELLSPACING=0 BORDERCOLOR=#663333><TR BGCOLOR=#663333><TD COLSPAN= VALIGN=middle popup_e> <SPAN CLASS=large><FONT COLOR=white><A NAME=''></A>■ BYMST・2016 (book section) BOOKPT［published 2016/03/31］</FONT> </SPAN></TD></TR><TR><TD VALIGN=middle BGCOLOR=#FFFFDD><B>Chandren, S.</B>; <B>Ohtani, B.</B>, Hollow Core-Shell Titania Photocatalysts for Selective Organic Synthesis. In 'Nanostructured Photocatalysts: Advanced Functional Materials',  (Yamashita, Hiromi; Li, Hexing eds.) Springer, Switzerland, 2016, pp. 137-146. [<A HREF='http://dx.doi.org/10.1007/978-3-319-26079-2'>DOI</A>]</TD></TR></TABLE></CENTER><CENTER><TABLE WIDTH=100% BORDER=1 CELLPADDING=3 CELLSPACING=0 BORDERCOLOR=#663333 TITLE='Changes in surface and bulk structures of rutile titania particles induced by braying up to 10 d and post calcination in air at 773 K were analyzed by reversed double-beam photoacoustic spectroscopy. The observed energy-resolved distribution of electron traps indicated that the surface was amorphized by braying to give rutile-core amorphous-shell structure and the amorphous layer was partly recrystallized by post-calcination leaving grain boundaries in the surface layers, both of which may cause the observed markedly decreased photocatalytic activities.'><TR BGCOLOR=#663333><TD COLSPAN= VALIGN=middle popup_e> <SPAN CLASS=large><FONT COLOR=white><A NAME=''></A>■ BRRUL・2021 (Letter)　《16》 ETRAPD［published 2021/03/31］</FONT><IMG SRC='/image/misc/oaLogo.png' HEIGHT=15 VARIGN=bottom> </SPAN></TD></TR><TR><TD VALIGN=middle BGCOLOR=#FFFFDD><B>Chen, G.</B>; <B>Takashima, M.</B>*; <B>Ohtani, B.</B>, Direct amorphous-structure analysis: How are surface/bulk structure and activity of titania photocatalyst particles changed by milling?, <I>Chem. Lett.</I>, <B>50</B>, 644-648 (2021).* [<A HREF='http://dx.doi.org/10.1246/cl.200825'>DOI</A>] ●乳鉢中の磨砕と焼成をおこなったルチル酸化チタンサンプルについて逆二重励起光音響分光法によって得られたERDT/CBBパターンをもとにして構造解析をおこない，磨砕/焼成によってすくなくとも3種類のアモルファス相を特定して定量できることをしめした．</TD></TR></TABLE></CENTER><CENTER><TABLE WIDTH=100% BORDER=1 CELLPADDING=3 CELLSPACING=0 BORDERCOLOR=#663333><TR BGCOLOR=#663333><TD COLSPAN= VALIGN=middle popup_e> <SPAN CLASS=large><FONT COLOR=white><A NAME=''></A>■ SNFET・2022 (article)　《7》 ETRAPD［received 2022/03/31］</FONT> </SPAN></TD></TR><TR><TD VALIGN=middle BGCOLOR=#FFFFDD>Zhang, L.; Chuaicham, C.; Balakumar, V.; Sekar, K.; <B>Ohtani, B.</B>; Sasaki, K., Determination of the roles of Fe<SUP>III</SUP> in the interface between titanium dioxide and montmorillonite in Fe<SUP>III</SUP>-doped montmorillonite/titanium dioxide composites as photocatalysts, <I>Appl. Clay Sci.</I>, <B>227</B>, 106577 (2022).* [<A HREF='http://dx.doi.org/10.1016/j.clay.2022.106577'>DOI</A>]</TD></TR></TABLE></CENTER>" )