Quantitative Analysis (Data Evaluation)

Hofmann, S.

doi:10.1007/978-3-642-27381-0_4

Cited by 2 publications

(1 citation statement)

References 138 publications

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“…Polymer brush layer thicknesses on gold surfaces were calculated using the equation , d = ln( I Au0 )/ I Au ·λ Au ·cos θ, where d = thickness (in nm) of the organic layer, I Au0 = intensity of the XPS signal of Au 4f 7/2 at 83.9 eV (relative to C 1s signal) in unmodified gold, I Au = intensity of XPS signal of Au 4f 7/2 (relative to C 1s signal) in modified gold, λ Au = effective attenuation length of Au 4f electrons in the organic films (using a value of 3.858 nm as reported by Petrovykh et al), and θ = the photoelectron emission takeoff angle relative to the surface normal (10°).…”

Section: Methodsmentioning

confidence: 99%

Systematic Comparison of Zwitterionic and Non-Zwitterionic Antifouling Polymer Brushes on a Bead-Based Platform

et al. 2018

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Nonspecific adsorption of biomolecules to solid surfaces, a process called biofouling, is a major concern in many biomedical applications. Great effort has been made in the development of antifouling polymer coatings that are capable of repelling the nonspecific adsorption of proteins, cells, and micro-organisms. In this respect, we herein contribute to understanding the factors that determine which polymer brush results in the best antifouling coating. To this end, we compared five different monomers: two sulfobetaines, a carboxybetaine, a phosphocholine, and a hydroxyl acrylamide. The antifouling coatings were analyzed using our previously described bead-based method with flow cytometry as the read-out system. This method allows for the quick and automated analysis of thousands of beads per second, enabling fast analysis and good statistics. We report the first direct comparison made between a sulfobetaine with opposite charges separated by two and three methylene groups and a carboxybetaine bearing two separating methylene groups. It was concluded that both the distance between opposite charges and the nature of the anionic groups have a distinct effect on the antifouling performance. Phosphocholines and simple hydroxyl acrylamides are not often compared with the betaines. However, here we found that they perform equally well or even better, yielding the following overall antifouling ranking: HPMAA ≥ PCMA-2 ≈ CBMAA-2 > SBMAA-2 > SBMAA-3 ≫ nonmodified beads (HPMAA being the best).

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Section: Methodsmentioning

confidence: 99%

Systematic Comparison of Zwitterionic and Non-Zwitterionic Antifouling Polymer Brushes on a Bead-Based Platform

et al. 2018

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Pd/CeO_2−x Nanorod Catalysts for CO Oxidation: Insights into the Origin of Their Regenerative Ability at Room Temperature

Zhou¹,

Lawrence²,

Wu³

et al. 2014

ChemCatChem

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The decrease in the activity of a catalyst after use is a persistent challenge in the chemical industry. We report that palladium‐decorated ceria (Pd/CeO2−x, in which 0≤x<0.5) nanorod catalysts demonstrate regenerative ability for carbon monoxide oxidation at room temperature. Pd/CeO2−x catalysts with 75 % decreased catalytic activity can be regenerated and restored almost 100 % of their original catalytic activity by exposing them to ambient conditions for 24 h. X‐ray spectroscopy studies of the atomic structures and oxidation states of palladium in the catalyst found that the formation of disordered palladium oxide is partly accountable for its observed regenerative catalytic property.

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Quantitative Analysis (Data Evaluation)

Cited by 2 publications

References 138 publications

Systematic Comparison of Zwitterionic and Non-Zwitterionic Antifouling Polymer Brushes on a Bead-Based Platform

Systematic Comparison of Zwitterionic and Non-Zwitterionic Antifouling Polymer Brushes on a Bead-Based Platform

Pd/CeO_2−x Nanorod Catalysts for CO Oxidation: Insights into the Origin of Their Regenerative Ability at Room Temperature

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Quantitative Analysis (Data Evaluation)

Cited by 2 publications

References 138 publications

Systematic Comparison of Zwitterionic and Non-Zwitterionic Antifouling Polymer Brushes on a Bead-Based Platform

Systematic Comparison of Zwitterionic and Non-Zwitterionic Antifouling Polymer Brushes on a Bead-Based Platform

Pd/CeO2−x Nanorod Catalysts for CO Oxidation: Insights into the Origin of Their Regenerative Ability at Room Temperature

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Pd/CeO_2−x Nanorod Catalysts for CO Oxidation: Insights into the Origin of Their Regenerative Ability at Room Temperature