Conformation of amphiphilic branch chain in copolymer surfactants on interface

Abstract

The conformation of amphiphilic branch chain in a new type of copolymer surfactants on interface was studied. The results of laser light scattering demonstrated that the branch chain can only lie on the air/water interface. By means of XPS measurement with variable angles, the molecular conformations in different thickness of the copolymer layer were obtained. Depending on the chemical nature of the copolymer surfactants, the oxyethylene segments of the branch chains will have loop‐train, train, or loop molecule conformations on the surface. © 1997 John Wiley & Sons, Inc. J Polym Sci B: Polym Phys 35: 827–830, 1997

Fe/Fe3C-NC Nanosheet/Carbon Nanotube Composite Electrocatalysts for Oxygen Reduction Reaction

“…Moreover, the presence of Fe–N species identifies the doping of Fe into N-doped carbon nanosheet to form the so-called Fe–N x active centers. The Fe 2p spectrum displays three types of Fe, namely, Fe­(II) 2p (711.6 and 724.8 eV), Fe­(III) 2p (714.9 and 731.1 eV), and satellite peak (718.3 eV), which are favorable for the formation of Fe–N x active sites (Figure d). , Nevertheless, the signal at around 707 eV for Fe 0 was missing, demonstrating that the majority of Fe species were covered by carbon layers. , It was further found out by XPS that Fe content in the G-Fe/Fe 3 C-NC/CNTs was around 0.3% and determined to be about 2% by elemental mapping investigation.…”

“…34,35 Nevertheless, the signal at around 707 eV for Fe 0 was missing, demonstrating that the majority of Fe species were covered by carbon layers. 36,37 It was further found out by XPS that Fe content in the G-Fe/ Fe 3 C-NC/CNTs was around 0.3% and determined to be about 2% by elemental mapping investigation.…”

Synthesis of Copolymer of Acrylamide and a Cationic-Nonionic Bifunctional Polymerizable Surfactant and Its Micellar Behavior in Water

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Creation of a Superhydrophobic Surface from an Amphiphilic Polymer

“…It has been shown that angle-resolved X-ray photoelectron spectroscopy (XPS) can provide useful information about the conformation of the polymer at the surface. [26] Figure 4 a shows the results of an angle-resolved XPS study of the PVA nanofiber/air interface, where the detection angles are 5, 30, 60, and 908, respectively. Figure 4 b shows the effect of varying the detection angle on the ratio of carbon (both ÀCH 2 À and > CHÀ) to oxygen atoms that were detected.…”