Surface properties of platinum thin films as a function of plasma treatment conditions

Li, Zhiyong; Beck, Patricia; Ohlberg, Douglas A. A.; Stewart, Donald C.; Williams, R. Stanley

doi:10.1016/s0039-6028(03)00015-3

Cited by 59 publications

(52 citation statements)

References 14 publications

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“…9, resolved components of Pt 4f signal centered at $71.5 eV (marked as 1) and at $74.8 eV (marked as 1 0 ) represent Pt 4f 7/2 and Pt 4f 5/2 doublets due to metallic platinum (Pt 0 ). Within experimental uncertainty (AE0.9 eV), obtained binding energy positions corresponding to metallic Pt are in excellent agreement with that of others [20,21]. Other two components of Pt 4f at $72.7 eV (marked as 2) and at $76.2 eV (marked as 2 0 ) represent Pt 4f 7/2 and Pt 4f 5/2 doublets which arise from Pt-O related bond formation, i.e., either in the from of PtO x (Pt x+ ) or in the from of chemisorbed oxygen attached with Pt surface.…”

Section: Resultssupporting

confidence: 89%

Effect of substrate temperature and annealing temperature on the structural, electrical and microstructural properties of thin Pt films by rf magnetron sputtering

Sreemany

Sen

2006

Applied Surface Science

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Section: Resultssupporting

confidence: 89%

Effect of substrate temperature and annealing temperature on the structural, electrical and microstructural properties of thin Pt films by rf magnetron sputtering

Sreemany

Sen

2006

Applied Surface Science

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“…A slight decrease in both real and imaginary parts of the refractive index can be anticipated as was seen in another wavelength region, 44 but the exact determination of the index requires other techniques, such as ellipsometry. Still, the determination is a big challenge with an appropriate method due to the influence of surface roughness on reflectivity, 45 and indeed a rougher surface is expected in the high-activity phase.…”

Section: Baseline Changementioning

confidence: 79%

Simultaneous in situ monitoring of surface and gas species and surface properties by modulation excitation polarization-modulation infrared reflection-absorption spectroscopy: CO oxidation over Pt film

Urakawa

Bürgi

Schläpfer

et al. 2006

The Journal of Chemical Physics

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A method for in situ monitoring of surface and gas species utilizing separately the difference and sum reflectivity of two polarizations, normal and parallel to the surface, measured by polarization-modulation infrared reflection-absorption spectroscopy is presented. Surface and gas-phase spectra were separately but simultaneously obtained from the reflectivities. The technique is combined with modulation excitation spectroscopy to further enhance the sensitivity, and a small-volume cell was designed for this purpose. CO oxidation over a 40 nm Pt film on aluminum was investigated under moderate pressure ͑atmospheric pressure, 5% CO, and 5%-40% O 2 ͒ at 373-433 K. The surface species involved in the oxidation process and the gas-phase species, both reactant ͑CO͒ and product ͑CO 2 ͒, could be simultaneously monitored and analyzed quantitatively. In addition, the reflectivity change of the sample during the reaction was assigned to a near-surface bulk property change, that is, surface reconstruction to the oxide phase. Under an O 2 -rich atmosphere, two reactive phases, denoted as low-and high-activity phases, were identified. A large amount of atop CO was observed during the low-activity phase, while the adsorbed CO completely disappeared during the high-activity phase. The presence of an infrared-inactive CO 2 precursor formed by the reaction between surface oxide and gaseous CO during the high-activity phase was inferred. The desorption of the CO 2 precursor is facilitated under a CO-rich atmosphere, most likely, by surface reconstruction to metallic Pt and a competitive adsorption of CO on the surface.

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“…For example, platinum catalytic activity is highly sensitive to surface contaminants such as hydrocarbons [ 22 ] and thiols, [ 23 ] and is also reduced by surface absorption of constituents of bio-fl uids, reducing biocompatibility. Therefore, undesirable surfactant additives are required for many bubble-propelled platinum systems [ 24 ] to reduce this fouling behavior.…”

mentioning

confidence: 99%

Reactive Inkjet Printing of Biocompatible Enzyme Powered Silk Micro‐Rockets

Gregory

Zhang

Smith

et al. 2016

Small

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Inkjet‐printed enzyme‐powered silk‐based micro‐rockets are able to undergo autonomous motion in a vast variety of fluidic environments including complex media such as human serum. By means of digital inkjet printing it is possible to alter the catalyst distribution simply and generate varying trajectory behavior of these micro‐rockets. Made of silk scaffolds containing enzymes these micro‐rockets are highly biocompatible and non‐biofouling.

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Surface properties of platinum thin films as a function of plasma treatment conditions

Cited by 59 publications

References 14 publications

Effect of substrate temperature and annealing temperature on the structural, electrical and microstructural properties of thin Pt films by rf magnetron sputtering

Effect of substrate temperature and annealing temperature on the structural, electrical and microstructural properties of thin Pt films by rf magnetron sputtering

Simultaneous in situ monitoring of surface and gas species and surface properties by modulation excitation polarization-modulation infrared reflection-absorption spectroscopy: CO oxidation over Pt film

Reactive Inkjet Printing of Biocompatible Enzyme Powered Silk Micro‐Rockets

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