scholarly journals Stabilisation of self-assembled DNA crystals by triplex-directed photo-cross-linking

2016 ◽  
Vol 52 (51) ◽  
pp. 8014-8017 ◽  
Author(s):  
Hatem O. Abdallah ◽  
Yoel P. Ohayon ◽  
Arun Richard Chandrasekaran ◽  
Ruojie Sha ◽  
Keith R. Fox ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Cross Linking ◽  
Dna Crystals ◽  
Direct Cross ◽  
Self Assembled

Cross-linked crystals: triplex-forming oligonucleotides can direct cross-linking reactions within or between tiles of a DNA crystal, improving their thermal stability.

scholarly journals Enzymatic and Chemical Cross-Linking of Bacterial Cellulose/Fish Collagen Composites—A Comparative Study

2021 ◽  
Vol 22 (7) ◽  
pp. 3346
Author(s):  
Agata Sommer ◽  
Paulina Dederko-Kantowicz ◽  
Hanna Staroszczyk ◽  
Sławomir Sommer ◽  
Marek Michalec
Keyword(s):  
Thermal Stability ◽  
Bacterial Cellulose ◽  
Secondary Alcohol ◽  
Water Vapor Permeability ◽  
Polymer Chains ◽  
Cross Linking ◽  
Vapor Permeability ◽  
Covalent Bonds ◽  
Fish Collagen ◽  
Chemical Cross Linking

This article compares the properties of bacterial cellulose/fish collagen composites (BC/Col) after enzymatic and chemical cross-linking. In our methodology, two transglutaminases are used for enzymatic cross-linking—one recommended for the meat and the other proposed for the fish industry—and pre-oxidated BC (oxBC) is used for chemical cross-linking. The structure of the obtained composites is characterized by scanning electron microscopy, thermogravimetric analysis, X-ray diffraction, and Fourier transform infrared spectroscopy, and their functional properties by mechanical and water barrier tests. While polymer chains in uncross-linked BC/Col are intertwined by H-bonds, new covalent bonds in enzymatically cross-linked ones are formed—resulting in increased thermal stability and crystallinity of the material. The C2–C3 bonds cleavage in D-glucose units, due to BC oxidation, cause secondary alcohol groups to vanish in favor of the carbonyl groups’ formation, thus reducing the number of H-bonded OHs. Thermal stability and crystallinity of oxBC/Col remain lower than those of BC/Col. The BC/Col formation did not affect tensile strength and water vapor permeability of BC, but enzymatic cross-linking with TGGS improved them significantly.

scholarly journals An estimation on the mechanical stabilities of SAMs by low energy Ar+ cluster ion collision

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Y. Tong ◽  
G. R. Berdiyorov ◽  
A. Sinopoli ◽  
M. E. Madjet ◽  
V. A. Esaulov ◽  
...  
Keyword(s):  
Electron Irradiation ◽  
Photoelectron Spectroscopy ◽  
Density Functional ◽  
Crystal Surface ◽  
Depth Profiling ◽  
Low Energy ◽  
Cross Linking ◽  
Xps Spectra ◽  
Self Assembled ◽  
The Stability

AbstractThe stability of the molecular self-assembled monolayers (SAMs) is of vital importance to the performance of the molecular electronics and their integration to the future electronics devices. Here we study the effect of electron irradiation-induced cross-linking on the stability of self-assembled monolayer of aromatic 5,5′-bis(mercaptomethyl)-2,2′-bipyridine [BPD; HS-CH2-(C5H3N)2-CH2-SH] on Au (111) single crystal surface. As a refence, we also study the properties of SAMs of electron saturated 1-dodecanethiol [C12; CH3-(CH2)11-SH] molecules. The stability of the considered SAMs before and after electron-irradiation is studied using low energy Ar+ cluster depth profiling monitored by recording the X-ray photoelectron spectroscopy (XPS) core level spectra and the UV-photoelectron spectroscopy (UPS) in the valance band range. The results indicate a stronger mechanical stability of BPD SAMs than the C12 SAMs. The stability of BPD SAMs enhances further after electron irradiation due to intermolecular cross-linking, whereas the electron irradiation results in deterioration of C12 molecules due to the saturated nature of the molecules. The depth profiling time of the cross-linked BPD SAM is more than 4 and 8 times longer than the profiling time obtained for pristine and BPD and C12 SAMs, respectively. The UPS results are supported by density functional theory calculations, which show qualitative agreement with the experiment and enable us to interpret the features in the XPS spectra during the etching process for structural characterization. The obtained results offer helpful options to estimate the structural stability of SAMs which is a key factor for the fabrication of molecular devices.

Self-Assembled Monolayer Coatings on Amorphous Iron and Iron Oxide Nanoparticles:  Thermal Stability and Chemical Reactivity Studies

Langmuir ◽  
1997 ◽  
Vol 13 (23) ◽  
pp. 6151-6158 ◽  
Author(s):  
G. Kataby ◽  
T. Prozorov ◽  
Yu. Koltypin ◽  
H. Cohen ◽  
Chaim N. Sukenik ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Iron Oxide ◽  
Iron Oxide Nanoparticles ◽  
Chemical Reactivity ◽  
Oxide Nanoparticles ◽  
Self Assembled Monolayer ◽  
Amorphous Iron ◽  
Self Assembled

scholarly journals Self-assembled two-dimensional nanofluidic proton channels with high thermal stability

2015 ◽  
Vol 6 (1) ◽  
Author(s):  
Jiao-Jing Shao ◽  
Kalyan Raidongia ◽  
Andrew R. Koltonow ◽  
Jiaxing Huang
Keyword(s):  
Thermal Stability ◽  
High Thermal Stability ◽  
Two Dimensional ◽  
Proton Channels ◽  
Self Assembled

Cross-linking of atoms and thermal stability of new MDF compositions

1996 ◽  
Vol 46 (2) ◽  
pp. 479-487 ◽  
Author(s):  
M. Drábik ◽  
Lubica Gáliková ◽  
Zuzana Sadleková ◽  
Mária Kubranová
Keyword(s):  
Thermal Stability ◽  
Cross Linking ◽  
Thermal Stability Of
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