Pulmonary surfactant is a complex mixture of phospholipids and proteins and forms a thin film at the lung alveolar interface separating air from liquid environment. The film reduces the work of breathing during repeatable compressions of the alveoli which form a characteristic multilayer upon compression. In this work, we investigated the structure of bovine lipid extract surfactant (BLES). We ...

Abstract Discovery of low-dimensional materials has been great interest in physics and material science. Optical permittivity is an optical fingerprint electronic structures, thus it important parameter the study properties materials. Spectroscopic ellipsometry provides a fast, robust, noninvasive method for obtaining spectra newly discovered Atomically thin have extremely short vertical path l...

This review focuses on the description of structure and composition a variety Langmuir monolayers (LMs) deposited at air/water interface by using ellipsometry, Brewster Angle microscopy scattering techniques, mainly neutron X-ray reflectometry. Since first experiment done Angels Pockels with homemade trough in her home kitchen until today, LMs different materials have been extensively studied p...

Ellipsometric measurements in a wide spectral range (from 0.05 to 6.5 eV) have been carried out on the organic semiconducting polymer, poly[2-methoxy-5-(3',7'-dimethyloctyloxy)-1,4-phenylene-vinylene] (MDMO-PPV), in both undoped and doped states. The real and imaginary parts of the dielectric function and the refractive index are determined accurately, provided that the layer thickness is measu...

Studies of thin strained InAs, AlAs, and AlSb layers by spectroscopic ellipsometry" (1996). The optical constants for thin layers of strained InAs, AlAs, and AlSb have been investigated by spectroscopic ellipsometry and multi-sample analyses. These materials are important for high-speed resonant tunneling diodes in the AlAs/InAs/In 0.53 Ga 0.47 As and AlSb/InAs material systems. Understanding t...

This paper reports the disassembly of layer-by-layer (LbL) films of plasmid DNA and a reducible cationic polypeptide. To utilize a reducing microenvironment of cellular plasma membrane as a potential trigger, LbL films are assembled to contain both DNA and the TAT-based polypeptide (PTAT) with reducible disulfide bonds in the backbone. The assembly and disassembly processes are monitored by gon...

Imaging ellipsometry was combined with electrochemical methods for studying electrostatic interactions of protein and solid surfaces. The potential of zero charge for gold-coated silicon wafer/solution interfaces wad determined by AC impedance method. The potential of the gold-coated silicon wafer was controlled at the potential of zero charge, and the adsorption of fibrinogen on the potential-...