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Topic Review
Principles of Bipolar Electrochemistry
Analytical techniques based on electrochemiluminescence (ECL) and bipolar electrochemistry (BPE) [ECL-BPE] have emerged as indispensable tools in various fields, and of particular interest, in biosensing. BPE has been a robust and reliable technique for some time now, and it has been used since the early 1970s for designing electrochemical reactors and batteries.
  • 327
  • 29 Jun 2023
Topic Review
Principle of Hydrophobicity
Hydrophobic thin films have attracted significant attention in both basic research and practical applications due to their unique properties. These thin films have undergone extensive study, and numerous efforts have been made to broaden their application fields to include areas such as oil hydrophobicity, hydrophobic anti-icing, and hydrophobic anti-corrosion. Additionally, fresh studies that explore approximate theories and fabrication techniques for hydrophobic thin films have emerged.
  • 640
  • 25 May 2023
Topic Review
Principle of Cold Spray Technology
Copper (Cu)-based composite coatings have been widely applied in all kinds of important industry fields due to their outstanding comprehensive properties. The preparation temperature of a composite coating is the key factor affecting the properties, so the cold spray (CS) technology is characterized by low-temperature solid-state deposition, which ensures its emergence as the most promising technology for preparing the Cu-based composite coatings. The CS process is achieved using high-pressure gas, during which the solid particles are regulated to impact the substrate at a supersonic speed and then deposited on the substrate surface to form a coating through severe plastic deformation. As a low-temperature solid-state deposition method, CS is characterized by a low deposition temperature, a low oxidation ratio of powder, a high deposition efficiency, little thermal influence on the substrate, etc., by which coatings with low porosity, high compactness, and controllable thickness can be prepared, establishing its indispensable position among coating preparation technologies.
  • 474
  • 14 Mar 2023
Topic Review
Principal Uses of Carbons from Glycerol
Biodiesel is produced by the transesterification of animal fats and vegetable oils, producing a large amount of glycerol as a by-product. The crude glycerol cannot be used in the food or pharmaceutical industries. It is crucial to transform glycerol into value-added products with applications in different areas to biodiesel be economically viable. One of the possible applications is its use as a precursor for the synthesis of carbon materials. The glycerol-based carbon materials have distinct properties due to the presence of sulfonic acid groups on the material surface, making them efficient catalysts. Additionally, the glycerol-based activated carbon materials show promising results concerning the adsorption of gases and liquid pollutants and recently as capacitors.
  • 585
  • 20 Dec 2022
Topic Review
Pressure-Induced Polymerization
Under pressure of 1–100 GPa, unsaturated organic molecules tend to form covalent bond to each other for a negative enthalpy change, which often produces polymeric materials with extended carbon skeleton. The polymerization reactions typically happen in crystal, which promotes the topochemical process. 
  • 616
  • 10 Feb 2022
Topic Review
Presentation of Film Deposition Method
The functional layer is an important part of the storage mechanism in lithium-ion batteries, as it helps to improve the performance and stability of the interface and allows for the efficient transfer of ions and electrons. The film deposition techniques are vital for the development of lithium-ion batteries by providing a functional layer at the interface between electrode and electrolyte, which fabricates a solid-state battery with a different approach from the traditional methods.
  • 623
  • 07 Mar 2023
Topic Review
Preparation of ZnO Nanocomposites for Improved Photocatalytic Activity
There are many methods of fabricating ZnO nanostructured materials, including solution-based and vapour-phase methods. However, some of the challenges with most solution-based preparation procedures are: (i) reproducibility due to the constraint of using metal salts of variable purity, (ii) the slow rate of crystal growth, and (iii) the necessity of shaping agents for well-regulated morphologies. Most synthetic strategies for Vis/solar light-responsive semiconductors aim for a reduction in the band gap energy and the effective separation of the photogenerated (e−/h+) charge carriers. These two properties rely on the particle dimension of the semiconductor, its crystal phase, and degree of crystallinity, hence, the need for shaping agents that produce increased specific surface areas for self-assembled nanoporous materials. Controlling synthesis conditions ensures the fabrication of semiconductors with the desired photocatalytic properties.
  • 374
  • 26 Dec 2022
Topic Review
Preparation of Protein Oleogels
In recent years, the search for alternative routes to structure oil has gained increasing interest. Structured oils are referred to as oleogels, in which the continuous lipid phase is an edible oil, and the structuring agent forms a three-dimensional network. Such oleogels are used as a substitute for solid fats, which contain high amounts of saturated and trans fatty acids. Among available structuring agents that have been used to provide solid properties to liquid oils, protein is a more recent candidate. Due to their nutritional value and high consumer acceptance, proteins are of special interest for the preparation of edible oleogels as an alternative for solid fats. Whereas the field of protein oleogelation is still rather new and just starts unfolding, several preparation methods have been demonstrated to be suitable for protein oleogel preparation. 
  • 2.0K
  • 12 Jan 2021
Topic Review
Preparation of Organosiloxane Telechelics by Cationic Ring-Opening Polymerization
Polydimethylsiloxanes (PDMS) telechelics are important both in industry and in academic research. They are used both in the free state and as part of copolymers and cross-linked materials. The most important, practically used, and well-studied method for the preparation of such PDMS is diorganosiloxane ring-opening polymerization (ROP) in the presence of nucleophilic or electrophilic initiators. Cationic ROP is also of interest for the preparation of functional PDMS. The advantage of this process is that it can be carried out at a relatively low temperature, the catalyst can be easily deactivated, and the process can also be used to synthesize polysiloxanes having base-sensitive substituents such as Si–H or Si–(CH2)3–SH.
  • 695
  • 24 Jun 2022
Topic Review
Preparation of Organosiloxane Telechelics by Anionic Ring-opening Polymerization
Polydimethylsiloxanes (PDMS) telechelics are important both in industry and in academic research. They are used both in the free state and as part of copolymers and cross-linked materials. The most important, practically used, and well-studied method for the preparation of such PDMS is diorganosiloxane ring-opening polymerization (ROP) in the presence of nucleophilic or electrophilic initiators. Anionic ring opening polymerization (AROP) under the action of various nucleophilic reagents is widely used for the synthesis of high molecular weight polydiorganosiloxane telechelics with various organic surroundings of the siloxane chain. In the process of cyclosiloxane opening and chain growth, side processes may occur: depolymerization due to the breaking of the linear chain by the active center (backbiting reaction) with the formation of low molecular weight cyclic products, and chain transfer reaction, in which the terminal active site attacks the siloxane bond of another polymer chain, leading to a redistribution of macromolecules, which is also called equilibration
  • 885
  • 24 Jun 2022
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