Two-Dimensional Crystallization of Streptavidin Studied by Quantitative Brewster Angle Microscopy

Langmuir ◽  
1996 ◽  
Vol 12 (5) ◽  
pp. 1312-1320 ◽  
Author(s):  
Wolfgang Frey ◽  
William R. Schief ◽  
Viola Vogel
2010 ◽  
Vol 5 (3) ◽  
pp. FA105-FA109 ◽  
Author(s):  
Jonathan Hobley ◽  
Sergey Gorelik ◽  
Tomoya Oori ◽  
Shinji Kajimoto ◽  
Hiroshi Fukumura ◽  
...  

2011 ◽  
Vol 15 (09n10) ◽  
pp. 1044-1051 ◽  
Author(s):  
Larissa A. Valkova ◽  
Victor V. Erokhin ◽  
Alexandr S. Glibin ◽  
Oscar I. Koifman

Comparative analysis of the structure of floating layers formed by copper tetra-tert-butylsubstituted phthalocyanine ( CuPctBu4 ) and tetrabenzotriazaporphyrin ( CuThptBu4 ) dissolved in a number of solvents is performed. The influence of the π-system extent (tetra-tert-butylsubstituted copper porphyrazine and phthalocyanine: CuPaztBu4 and CuPctBu4 ) on the structure of Langmuir layers of copper azaporphyrins is studied. It is shown that both the lack of one meso-atom and the increase of the extent of the π-system cause the balance between intermolecular interactions (AP–AP) — (AP-water) to shift to the latter and lead to formation of stable monolayers with the most open face-on structure of nanoaggregates instead of the edge-on one, all other factors being equal, in Langmuir layers prepared from solutions in aromatic solvents. The micro-level structural difference of copper tetra-tert-butylsubstituted porphyrazine ( CuPaztBu4 ) and phthalocyanine ( CuPctBu4 ) resulted from the structural difference of two-dimensional nanoaggregates forming the layers was shown using Brewster angle microscopy.


2013 ◽  
Vol 167-168 ◽  
pp. 33-42 ◽  
Author(s):  
Safia Nathoo ◽  
Jennifer K. Litzenberger ◽  
Denice C. Bay ◽  
Raymond J. Turner ◽  
Elmar J. Prenner

1995 ◽  
Vol 117 (6) ◽  
pp. 1151-1155 ◽  
Author(s):  
Hideaki Tanaka ◽  
Ken-ichi Hayashi ◽  
Takahisa Akatsuka ◽  
Jiro Toyama ◽  
Kazuyuki Noda ◽  
...  

2021 ◽  
Author(s):  
Vl A Margulis ◽  
E E Muryumin

Abstract The optical reflection, transmission and absorption properties of borophene, a newly discovered two-dimensional material with tilted anisotropic Dirac cones, are explored within a simple electronic band structure model of 8-Pmmn borophene, proposed by Zabolotskiy and Lozovik (2016 Phys. Rev. B 94 165403). It is assumed that the borophene layer is deposited on a dielectric substrate, such as Al2O3, and that the borophene's electron density is controlled by an external gate voltage. The reflectance, transmittance and absorbance of the borophene layer, the conduction band of which is filled with electrons up to the Fermi level, are calculated against the frequency of the incident radiation, as well as on the angle of its incidence on the layer. Considered are the two principal cases of the incident radiation polarization either parallel to or normal to the plane of incidence. We reveal that the optical characteristics of 8-Pmmn borophene are distinctly different for the above two cases at all angles of radiation incidence, excepting the grazing incidence, for which the borophene layer is found to behave like a mirror regardless of the wave polarization. The results obtained indicate the possibility of visualizing the borophene layer deposited on a dielectric substrate by observing the minimum reflectivity of this layer at a certain angle incidence (called the quasi-Brewster angle) of the p-polarized radiation, which may differ by a value of about ten degrees from the Brewster angle of the substrate.


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