title: Stereospecific growth of densely populated rutile mesoporous TiO2 nanoplate films: a facile low temperature chemical synthesis approach.
abstract: We report for the first time, using a simple and environmentally benign chemical method, the low temperature synthesis of densely populated upright-standing rutile TiO(2) nanoplate films onto a glass substrate from a mixture of titanium trichloride, hydrogen peroxide and thiourea in triply distilled water. The rutile TiO(2) nanoplate films (the phase is confirmed from x-ray diffraction analysis, selected area electron diffraction, energy-dispersive x-ray analysis, and Raman shift) are 20-35 nm wide and 100-120 nm long. The chemical reaction kinetics for the growth of these upright-standing TiO(2) nanoplate films is also interpreted. Films of TiO(2) nanoplates are optically transparent in the visible region with a sharp absorption edge close to 350 nm, confirming an indirect band gap energy of 3.12 eV. The Brunauer-Emmet-Teller surface area, Barret-Joyner-Halenda pore volume and pore diameter, obtained from N(2) physisorption studies, are 82 m(2) g(-1), 0.0964 cm(3) g(-1) and 3.5 nm, respectively, confirming the mesoporosity of scratched rutile TiO(2) nanoplate powder that would be ideal for the direct fabrication of nanoscaled devices including upcoming dye-sensitized solar cells and gas sensors.
authors.affiliation: Clean Energy Research Center, Korea Institute of Science and Technology, Seoul 130-650, Republic of Korea.
authors.forename: Go-Woon
authors.initials: GW
authors.lastname: Lee
authors.forename: Swapnil B
authors.initials: SB
authors.lastname: Ambade
authors.forename: Young-Jin
authors.initials: YJ
authors.lastname: Cho
authors.forename: Rajaram S
authors.initials: RS
authors.lastname: Mane
authors.forename: V
authors.initials: V
authors.lastname: Shashikala
authors.forename: Jyotiprakash
authors.initials: J
authors.lastname: Yadav
authors.forename: Rajendra S
authors.initials: RS
authors.lastname: Gaikwad
authors.forename: Soo-Hyoung
authors.initials: SH
authors.lastname: Lee
authors.forename: Kwang-Deog
authors.initials: KD
authors.lastname: Jung
authors.forename: Sung-Hwan
authors.initials: SH
authors.lastname: Han
authors.forename: Oh-Shim
authors.initials: OS
authors.lastname: Joo