Cation Bridging Studied by Specular Neutron Reflection
نویسندگان
چکیده
The binding of an anionic surfactant onto an anionic surface by addition of divalent ions is reported based on experimental data from specular neutron reflection (NR) and attenuated total internal reflection IR spectroscopy (ATR-IR). Similar measurements using monovalent ions (sodium) do not show any evidence of such adsorption, even though the amount of surfactant can be much higher. This data is interpreted in terms of the so-called bridging mechanism of ion binding.
منابع مشابه
Application of Diamond Nanoparticles in Low-Energy Neutron Physics
Diamond, with its exceptionally high optical nuclear potential and low absorption cross-section, is a unique material for a series of applications in VCN (very cold neutron) physics and techniques. In particular, powder of diamond nanoparticles provides the best reflector for neutrons in the complete VCN energy range. It allowed also the first observation of quasi-specular reflection of cold ne...
متن کاملDiffuse neutron reflectivity and AFM study of interface morphology of an electro-deposited Ni/Cu film
We present a detailed study of the interface morphology of an electro-deposited (ED) Ni/Cu bilayer film by using off-specular (diffuse) neutron reflectivity technique and Atomic Force Microscopy (AFM). The Ni/Cu bilayer has been electro-deposited on seed layers of Ti/Cu. These two seed layers were deposited by magnetron sputtering. The depth profile of density in the sample has been obtained fr...
متن کاملEstimating Light Position and Surface Reflectance from Specular Reflection under Perspective Projection
In this paper, we propose a new method for estimating reflection properties of a real object surface from a single specular component image, as well as the light source position. Polarization is used for separating the diffuse and specular reflection components. Different from previous approaches, which heavily assumed both distant viewpoint and illuminant position, our method can work even und...
متن کاملMechanical properties of interacting lipopolysaccharide membranes from bacteria mutants studied by specular and off-specular neutron scattering.
Specular and off-specular neutron scattering are used to study the influence of molecular chemistry (mutation) on the intermembrane interactions and mechanical properties of the outer membrane of Gram-negative bacteria consisting of lipopolysaccharides (LPSs). For this purpose, solid-supported multilayers of mutant LPS membranes are deposited on silicon wafers and hydrated either at defined hum...
متن کاملProcessing Specular Reflection Components of Chrome-plated Surface by Multi-Image Reconstruction Method
Chrome-plated surfaces are perfectly specular, in which the diffuse reflection components are weak while the specular reflection components are so strong that their intensities saturate the CCD matrix and cause some surface features to be lost. This situation means that one image alone cannot show all of the surface features. To process specular reflection components, we proposed a novel multi-...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
دوره 29 شماره
صفحات -
تاریخ انتشار 2013