Carbon Monoxide Oxidation on Nanostructured Pt Thin Films Synthesized by Pulsed Laser Deposition: Insights into the Morphology Effects

Nanostructured Pt thin film catalysts of various morphologies have been synthesized by pulsed laser deposition and studied towards enhancing their tolerance to CO poisoning, a reaction of critical issue to liquid fuel cells. It was discovered that Pt film deposited under 5 Torr of He background pressure showed the highest electroactive surface area and the lowest onset potential of CO oxidation demonstrating an enhancement of the CO poisoning resistance. The reason for such enhanced electrocatalytic activity is ascribed to the high roughness of Pt surface. This study further provides a methodology for the proper design of electrocatalysts that might be considered to be developed by the pulsed laser deposition technique.

Download Full-text

Pulsed laser deposition of nanocomposite MoSex/Mo thin-film catalysts for hydrogen evolution reaction

Thin Solid Films ◽

10.1016/j.tsf.2015.09.024 ◽

2015 ◽

Vol 592 ◽

pp. 175-181 ◽

Cited By ~ 24

Author(s):

S.N. Grigoriev ◽

V.Yu. Fominski ◽

R.I. Romanov ◽

M.A. Volosova ◽

A.V. Shelyakov

Keyword(s):

Thin Film ◽

Pulsed Laser Deposition ◽

Hydrogen Evolution ◽

Hydrogen Evolution Reaction ◽

Pulsed Laser ◽

Laser Deposition ◽

Thin Film Catalysts

Download Full-text

Microanalysis of silicate glass films grown on α-Al2O3 by pulsed-laser deposition

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100148022 ◽

1993 ◽

Vol 51 ◽

pp. 438-439

Author(s):

Michael P. Mallamaci ◽

James Bentley ◽

C. Barry Carter

Keyword(s):

Liquid Phase ◽

Single Crystal ◽

Pulsed Laser Deposition ◽

Pulsed Laser ◽

Ceramic Materials ◽

Laser Deposition ◽

Triple Junctions ◽

Ion Milling ◽

Multicomponent Oxides ◽

Glass Films

Glass-oxide interfaces play important roles in developing the properties of liquid-phase sintered ceramics and glass-ceramic materials. Deposition of glasses in thin-film form on oxide substrates is a potential way to determine the properties of such interfaces directly. Pulsed-laser deposition (PLD) has been successful in growing stoichiometric thin films of multicomponent oxides. Since traditional glasses are multicomponent oxides, there is the potential for PLD to provide a unique method for growing amorphous coatings on ceramics with precise control of the glass composition. Deposition of an anorthite-based (CaAl2Si2O8) glass on single-crystal α-Al2O3 was chosen as a model system to explore the feasibility of PLD for growing glass layers, since anorthite-based glass films are commonly found in the grain boundaries and triple junctions of liquid-phase sintered α-Al2O3 ceramics.Single-crystal (0001) α-Al2O3 substrates in pre-thinned form were used for film depositions. Prethinned substrates were prepared by polishing the side intended for deposition, then dimpling and polishing the opposite side, and finally ion-milling to perforation.

Download Full-text

Pulsed laser deposition of relaxor ferroelectric films

Journal de Physique IV (Proceedings) ◽

10.1051/jp4:1998951 ◽

1998 ◽

Vol 08 (PR9) ◽

pp. Pr9-261-Pr9-264

Author(s):

M. Tyunina ◽

J. Levoska ◽

A. Sternberg ◽

V. Zauls ◽

M. Kundzinsh ◽

...

Keyword(s):

Pulsed Laser Deposition ◽

Pulsed Laser ◽

Relaxor Ferroelectric ◽

Laser Deposition ◽

Ferroelectric Films

Download Full-text

Pulsed laser deposition of PbMg1/3Nb2/3O3 thin films and PbMg1/3Nb2/3O3/PbTiO3 multilayers

Journal de Physique IV (Proceedings) ◽

10.1051/jp4:20011110 ◽

2001 ◽

Vol 11 (PR11) ◽

pp. Pr11-65-Pr11-69

Author(s):

N. Lemée ◽

H. Bouyanfif ◽

J. L. Dellis ◽

M. El Marssi ◽

M. G. Karkut ◽

...

Keyword(s):

Thin Films ◽

Pulsed Laser Deposition ◽

Pulsed Laser ◽

Laser Deposition

Download Full-text

SrBi2Nb2O9 ferroelectric thin films deposited by pulsed laser deposition on textured and epitaxied platinum electrodes

Journal de Physique IV (Proceedings) ◽

10.1051/jp4:20011121 ◽

2001 ◽

Vol 11 (PR11) ◽

pp. Pr11-133-Pr11-137

Author(s):

J. R. Duclère ◽

M. Guilloux-Viry ◽

A. Perrin ◽

A. Dauscher ◽

S. Weber ◽

...

Keyword(s):

Thin Films ◽

Pulsed Laser Deposition ◽

Pulsed Laser ◽

Ferroelectric Thin Films ◽

Laser Deposition ◽

Platinum Electrodes

Download Full-text

Microstructural and Electrical Characterization of Barium Strontium Titanatebased Solid Solution Thin Films Deposited on Ceramic Substrates by Pulsed Laser Deposition

MRS Proceedings ◽

10.1557/proc-720-h2.4 ◽

2002 ◽

Vol 720 ◽

Author(s):

Costas G. Fountzoulas ◽

Daniel M. Potrepka ◽

Steven C. Tidrow

Keyword(s):

Thin Films ◽

Dielectric Constant ◽

Pulsed Laser Deposition ◽

Pulsed Laser ◽

Electrical Characterization ◽

Field Variable ◽

Laser Deposition ◽

X Ray Diffraction ◽

Ceramic Substrates ◽

Nominal Thickness

AbstractFerroelectrics are multicomponent materials with a wealth of interesting and useful properties, such as piezoelectricity. The dielectric constant of the BSTO ferroelectrics can be changed by applying an electric field. Variable dielectric constant results in a change in phase velocity in the device allowing it to be tuned in real time for a particular application. The microstructure of the film influences the electronic properties which in turn influences the performance of the film. Ba0.6Sr0.4Ti1-y(A 3+, B5+)yO3 thin films, of nominal thickness of 0.65 μm, were synthesized initially at substrate temperatures of 400°C, and subsequently annealed to 750°C, on LaAlO3 (100) substrates, previously coated with LaSrCoO conductive buffer layer, using the pulsed laser deposition technique. The microstructural and physical characteristics of the postannealed thin films have been studied using x-ray diffraction, scanning electron microscopy, and nano indentation and are reported. Results of capacitance measurements are used to obtain dielectric constant and tunability in the paraelectric (T>Tc) regime.

Download Full-text