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Take down policyIf you believe that this document breaches copyright please contact us providing details, and we will remove access to the work immediately and investigate your claim. Insights into the temperature dependence of atomic layer deposition (ALD) of Pt using (methylcyclopentadienyl)trimethylplatinum, (MeCp)PtMe 3 , precursor and O 2 are presented, based on a study of reaction products by time-resolved quadrupole mass spectrometry (QMS) measurements. Above 250 • C, Pt ALD proceeds through unhindered O 2 dissociation at the Pt surface, inducing complete and instantaneous combustion of the precursor ligands. Quantification of the QMS data revealed that at 300 • C, approximately 20% of the C-atoms react during the precursor pulse, forming mainly CH 4 (∼18%) balanced by CO 2 (∼2%). The remaining 80% of the C-atoms are combusted during the O 2 pulse. Time-resolved data indicated that the combustion reactions compete with the hydrogenation reactions for the available surface carbon. Combustion reactions were found to be dominant, provided that a sufficient amount of chemisorbed oxygen is available. When the temperature drops below 250 • C, deposition becomes hindered by the presence of a carbonaceous surface layer of partially fragmented and dehydrogenated precursor ligands, formed during the precursor pulse. The carbonaceous layer limits dissociative chemisorption of O 2 and hence combustion reactions (leading to CO 2 ) whereas reduced surface reactivity also limits (de-)hydrogenation reactions (leading to CH 4 ). Below 100 • C, the carbonaceous layer fully prevents O 2 dissociation and ALD of Pt cannot proceed.
Lead modified platinum on carbon catalysts for the selective oxidation of (2-) hydroxycarbonic acids, and especially polyhydroxycarbonic acids to their 2-keto derivatives. Applied Catalysis, 33(1), 83-96.
A multichannel image segmentation method is proposed that utilizes Markov random fields (MRF's) with adaptive neighborhood (AN) systems. Bayesian inference is applied to realize the combination of evidence from different knowledge sources. In such a way, optimization of the shape of a neighborhood system is achieved by following a criterion that makes use of the Markovian property exploiting the local image content. The MRF segmentation approach with AN systems (MRF-AN) makes it possible to better preserve small features and border areas. The purpose of the paper is to show the usefulness of the concept of MRF-AN for SAR image segmentation.
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