Adsorption geometry and self-assembling of chiral modifier (R)-(+)-1-(1-naphthylethylamine) on Pt(111)

2020 ◽  
Vol 22 (27) ◽  
pp. 15696-15706 ◽  
Author(s):  
Smadar Attia ◽  
Evan J. Spadafora ◽  
Marvin C. Schmidt ◽  
Carsten Schröder ◽  
Ann-Katrin Baumann ◽  
...  
Keyword(s):  
Mechanistic Study ◽  
Single Crystalline ◽  
Self Assembling ◽  
Chiral Modifier ◽  
Adsorption Geometry

A mechanistic study on interaction of a chiral modifier – (R)-(+)-1-(1-naphthylethylamine) (R-NEA) – with a single crystalline Pt(111) surface is reported.

A Simple Deposition Method for Self-Assembling Single Crystalline Hybrid Perovskite Nanostructures

2017 ◽  
Vol 34 (6) ◽  
pp. 068103 ◽  
Author(s):  
Wen-Rong Xie ◽  
Bin Liu ◽  
Tao Tao ◽  
Guo-Gang Zhang ◽  
Bao-Hua Zhang ◽  
...  
Keyword(s):  
Deposition Method ◽  
Single Crystalline ◽  
Self Assembling ◽  
Hybrid Perovskite

Mechanistic Study of Self-Assembling Peptide RADA16-I in Formation of Nanofibers and Hydrogels

2009 ◽  
Vol 1 (1) ◽  
Author(s):  
Hangyu Zhang ◽  
Hanlin Luo ◽  
Xiaojun Zhao
Keyword(s):  
Self Assembly ◽  
Physiological Condition ◽  
Biochemical Properties ◽  
Low Ph ◽  
Repulsive Force ◽  
Mechanistic Study ◽  
Peptide Backbone ◽  
Self Assembling ◽  
Phosphate Buffered Saline ◽  
Β Sheet

The biophysical and biochemical properties of RADA16-I, the representative of a class of self-assembling peptides, were studied to elucidate the molecular mechanism of nanofiber and hydrogel formations. We found that self-assembly occurs in the solution at low pH (pH 4), rather than the popular belief that it occurs in the physiological environment. Actually, the peptide lost its β-sheet structure and formed irregular aggregates in the condition around pH 7. Our results demonstrated that the extended conformation of peptide backbone caused by the electrostatic repulsive force in acid solution is crucial for the peptide to self-assemble into nanofibers. Importantly, we have proposed a mechanism for the peptide to form nanofiber hydrogel in the physiological condition, which is not propitious for nanofiber formation. Hypothetically, it is by virtue of the tendency of fibers to collapse and form irregular aggregates at pH 7 that we could obtain stable hydrogels by introducing phosphate buffered saline into the system.

“Preparation of Single Crystalline Gold Films for ED Studies”

1972 ◽  
Vol 30 ◽  
pp. 634-635
Author(s):  
Joseph D. C. Peng
Keyword(s):  
Crystal Morphology ◽  
Diffraction Theory ◽  
Scattering Matrix ◽  
Vacuum Evaporation ◽  
Gold Films ◽  
Matrix Formulation ◽  
Silver Films ◽  
Single Crystalline ◽  
Grating Pattern ◽  
Stacking Disorder

The relative intensities of the ED spots in a cross-grating pattern can be calculated using N-beam electron diffraction theory. The scattering matrix formulation of N-beam ED theory has been previously applied to imperfect microcrystals of gold containing stacking disorder (coherent twinning) in the (111) crystal plane. In the present experiment an effort has been made to grow single-crystalline, defect-free (111) gold films of a uniform and accurately know thickness using vacuum evaporation techniques. These represent stringent conditions to be met experimentally; however, if a meaningful comparison is to be made between theory and experiment, these factors must be carefully controlled. It is well-known that crystal morphology, perfection, and orientation each have pronounced effects on relative intensities in single crystals.The double evaporation method first suggested by Pashley was employed with some modifications. Oriented silver films of a thickness of about 1500Å were first grown by vacuum evaporation on freshly cleaved mica, with the substrate temperature at 285° C during evaporation with the deposition rate at 500-800Å/sec.

Torus Circumference and Thickness Parameters From a Linear DNA Size Series Suggest How Toruses Self-Assemble

1985 ◽  
Vol 43 ◽  
pp. 522-523
Author(s):  
George C. Ruben ◽  
Kenneth A. Marx
Keyword(s):  
Tertiary Structure ◽  
Dna Complexes ◽  
Tertiary Structures ◽  
Self Assembling ◽  
Double Stranded Dna ◽  
Calf Thymus ◽  
Dna Organization ◽  
Condensed Dna ◽  
Dna Size

Certain double stranded DNA bacteriophage and viruses are thought to have their DNA organized into large torus shaped structures. Morphologically, these poorly understood biological DNA tertiary structures resemble spermidine-condensed DNA complexes formed in vitro in the total absence of other macromolecules normally synthesized by the pathogens for the purpose of their own DNA packaging. Therefore, we have studied the tertiary structure of these self-assembling torus shaped spermidine- DNA complexes in a series of reports. Using freeze-etch, low Pt-C metal (10-15Å) replicas, we have visualized the microscopic DNA organization of both calf Thymus( CT) and linear 0X-174 RFII DNA toruses. In these structures DNA is circumferentially wound, continuously, around the torus into a semi-crystalline, hexagonal packed array of parallel DNA helix sections.

Mechanistic study of proliferation induced by Angelica sinensis in gastric epithelial cells

2001 ◽  
Vol 120 (5) ◽  
pp. A145-A145
Author(s):  
C CHO ◽  
Y YE ◽  
E LIU ◽  
V SHIN ◽  
N SHAM
Keyword(s):  
Epithelial Cells ◽  
Mechanistic Study ◽  
Angelica Sinensis ◽  
Gastric Epithelial Cells

Structure–property studies of self-assembling [n.n]paracyclophanes

2020 ◽  
Author(s):  
Will R Henderson ◽  
Danielle E. Fagnani ◽  
Yu Zhu ◽  
Guancen Liu ◽  
Ronald K. Castellano
Keyword(s):  
Structure Property ◽  
Self Assembling

Self assembling mirrors

Nature ◽  
1999 ◽  
Author(s):  
Philip Ball
Keyword(s):  
Self Assembling

Mechanistic study on the cardioprotective and chemosensitizing effects of a novel danshensu derivative

Planta Medica ◽  
2014 ◽  
Vol 80 (16) ◽  
Author(s):  
L Wang ◽  
L Shan ◽  
G Cui ◽  
Y Chen ◽  
J li ◽  
...  
Keyword(s):  
Mechanistic Study
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