Photoelectrochemical cell using dye sensitized zinc oxide nanowires grown on carbon fibers

Ünalan, Hüsnü Emrah
Suzuki, Kenichi
Dalal, Sharvari
Hiralal, Pritesh
Matsumoto, Hidetoshi
Imaizumi, Shinji
Minagawa, Mie
Tanioka, Akihiko
Flewitt, Andrew J.
Milne, William I.
Amaratunga, Gehan A. J.
Zinc oxide (ZnO) nanowires (NWs) grown on carbon fibers using a vapor transport and condensation approach are used as the cathode of a photoelectrochemical cell. The carbon fibers were obtained by electrospray deposition and take the form of a flexible carbon fabric. The ZnO NW on carbon fiber anode is combined with a "black dye" photoabsorber, an electrolyte, and a platinum (Pt) counterelectrode to complete the cell. The results show that ZnO NW and carbon fibers can be used for photoinduced charge separation/charge transport and current collection, respectively, in a photoelectrochemical cell. (C) 2008 American Institute of Physics.


Field emission from graphene based composite thin films
Eda, Goki; Ünalan, Hüsnü Emrah; Rupesinghe, Nalin; Amaratunga, Gehan A. J.; Chhowalla, Manish (AIP Publishing, 2008-12-08)
Field emission from graphene is challenging because the existing deposition methods lead to sheets that lay flat on the substrate surface, which limits the field enhancement. Here we describe a simple and general solution based method for the deposition of field emitting graphene/polymer composite thin films. The graphene sheets are oriented at some angles with respect to the substrate surface leading to field emission at low threshold fields (similar to 4 V mu m(-1)). Our method provides a route for the de...
Zinc oxide nanowire networks for macroelectronic devices
Ünalan, Hüsnü Emrah; Hiralal, Pritesh; Dalal, Sharvari; Chu, Daping; Eda, Goki; Teo, K. B. K.; Chhowalla, Manish; Milne, William I.; Amaratunga, Gehan A. J. (AIP Publishing, 2009-04-20)
Highly transparent zinc oxide (ZnO) nanowire networks have been used as the active material in thin film transistors (TFTs) and complementary inverter devices. A systematic study on a range of networks of variable density and TFT channel length was performed. ZnO nanowire networks provide a less lithographically intense alternative to individual nanowire devices, are always semiconducting, and yield significantly higher mobilites than those achieved from currently used amorphous Si and organic TFTs. These r...
CHOI, YH; Beşikci, Cengiz; SUDHARSANAN, R; RAZEGHI, M (AIP Publishing, 1993-07-19)
We report the growth of In1-xTlxSb, a new III-V alloy for long-wavelength infrared detector applications, by low-pressure metalorganic chemical vapor deposition. In1-xTlxSb with good surface morphology was obtained on both GaAs and InSb substrates at a growth temperature of 455-degrees-C. X-ray diffraction measurements showed resolved peaks of In1-xTlxSb and InSb films. Infrared absorption spectrum of In1-xTlxSb showed a shift toward lower energies compared to InSb spectrum. Hall mobility data on In1-xTlxSb...
Stable, self-ballasting field emission from zinc oxide nanowires grown on an array of vertically aligned carbon nanofibers
Li, C.; Zhang, Y.; Mann, M.; Hiralal, P.; Ünalan, Hüsnü Emrah; Lei, W.; Wang, B. P.; Chu, D. P.; Pribat, D.; Amaratunga, G. A. J.; Milne, W. I. (AIP Publishing, 2010-04-05)
A structure composed of zinc oxide nanowires (ZNWs) grown hydrothermally on an array of vertically aligned carbon nanofibers (CNFs) was fabricated and its field emission properties determined and compared with bare CNF arrays. The combination produced a macroscopic turn-on field of 1.2 V/mu m which was found to be the lowest reported from ZNWs deposited on a two-dimensional substrate and much less than the equivalent CNFs array (5.2 V/mu m). Crucially, field emission was found to be much more stable at high...
Novel RDX-Based Cage and Cage-Like Nitramines
Türker, Burhan Lemi; Bayar, Caglar Celik; Turhan, Hamza (Informa UK Limited, 2013-10-01)
1,3,5-Trinitroperhydro-1,3,5-triazine (RDX)-based cage and cage-like nitramines in which two RDX molecules are linked to each other via three and two carbon atoms, respectively, have been investigated computationally using density functional theory (DFT) at a B3LYP/6-31G(d,p) theoretical level. The study focused on finding out how the quantum chemical and detonation properties of RDX change if two RDX molecules come together and form these structures. Both considered nitramines exhibited higher heats of for...
Citation Formats
H. E. Ünalan et al., “Photoelectrochemical cell using dye sensitized zinc oxide nanowires grown on carbon fibers,” APPLIED PHYSICS LETTERS, pp. 0–0, 2008, Accessed: 00, 2020. [Online]. Available: