A5079186922- Force Microscopy Techniques and Applications
- Advanced Polymer Synthesis and Characterization
- Conducting polymers and applications
- Advanced Chemical Sensor Technologies
- Polymer composites and self-healing
- Synthesis and properties of polymers
- Advanced Sensor and Energy Harvesting Materials
- Photopolymerization techniques and applications
- Polymer crystallization and properties
- Ion-surface interactions and analysis
- Cellular Mechanics and Interactions
- Silicone and Siloxane Chemistry
- Surfactants and Colloidal Systems
- Venomous Animal Envenomation and Studies
- Protein Structure and Dynamics
- Mechanical and Optical Resonators
- Luminescence and Fluorescent Materials
- Crystallography and molecular interactions
- Synthetic Organic Chemistry Methods
- Enzyme Structure and Function
Botswana Geoscience Institute
2017-2020
Changchun University of Technology
2020
Technion – Israel Institute of Technology
2016-2018
Hefei Design and Research Institute of Coal Industry (China)
2009
Many of the attractive properties in polymers are a consequence their high molecular weight and therefore, scission chains due to mechanochemistry leads deterioration performance. Intramolecular cross-links systematically added linear chains, slowing down mechanochemical degradation point where become virtually invincible shear solution. Our approach mimics immunoglobulin-like domains Titin, whose structure directs mechanical force towards sacrificial intramolecular hydrogen bonds, absorbing...
Abstract Flexible sensors can be widely used in future wearable devices to monitor people's health states. However, most of the are sensitive humidity and bending effects, limiting their application a real‐world environment. A new strategy is proposed for obtaining flexible with good tolerance humidity. By integrating hydrophobic layer on surface doped polyaniline, sensor that resist water response concentration up 350 ppm developed. Good resilience against mechanical also achieved this...
The mechanochemical stability of a polymer is fundamental parameter when choosing the ideal material for many different uses where mechanical loading may induce molecular weight reduction. use mechanophores has significantly improved detection reaction, but their incorporation to polymers can be synthetically challenging. Alternatively, we return old strategy using spin traps quantify radicals produced as consequence homolytic bond scission events. Several new have been developed in recent...
Addition of intramolecular cross-links to linear polymers significantly improves their resistance mechanochemical fragmentation, and hence the physical properties polymer solutions are maintained under shear. However, while fragmentation is suppressed, mechanochemistry chemical bonds still occurs. In polymers, rate has been shown increase linearly with degree polymerisation. Here, we report a systematic study series increasing length, intramolecularly collapsed, in order understand...
In Nature, numerous proteins have evolved to perform similar roles, such as mechanical energy dispersion in different tissues. These biological macromolecules obtain their function from tertiary structure, but with roles can be quite each other, making it hard define what structural features could mimicked synthetic materials order improve performance. Here, we introduce an important protein feature - disulphide loops into polymers and study the role of loop size on dispersion. By stressing...
The mechanical properties of an amorphous polymer are a consequence the inter- and intramolecular interactions which typically similar. Yet, polymers can be made with covalent cross-links, leading to stronger interactions. Here, study on effect this cross-linking glassy is shown. A linear poly(methyl methacrylate) defined size was cross-linked at different ratios assembled into solid samples by solvent casting. Mechanical testing indicates that does not affect elastic region but influence...
A comprehensive examination of the synthesis single chain polymer nanoparticles (SCPNs) from a copolymer methyl acrylate (MA) and 2-hydroxyethyl (HEA) <italic>via</italic> intra-chain urethane formation by using hexamethylene diisocyanate (HDI) as cross-linker is described.
Abstract Many of the attractive properties in polymers are a consequence their high molecular weight and therefore, scission chains due to mechanochemistry leads deterioration performance. Intramolecular cross‐links systematically added linear chains, slowing down mechanochemical degradation point where become virtually invincible shear solution. Our approach mimics immunoglobulin‐like domains Titin, whose structure directs mechanical force towards sacrificial intramolecular hydrogen bonds,...
In article number 1800232 by Weiwei Wu, Hossam Haick, and co-workers, a strategy of oleic acid molecular layer assembly on PANI-based flexible sensors, is proposed to achieve tolerance mechanical bending humidity effects, up 350 ppm. These results trigger the real application sensor applications in wearable devices for disease diagnostics.