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Topic Review
Mechanisms of Photocatalytic Overall Water Splitting
Photocatalytic overall water splitting in solar–chemical energy conversion can effectively mitigate environmental pollution and resource depletion. Stable ternary metal indium zinc sulfide (ZnIn2S4) is considered one of the ideal materials for photocatalytic overall water splitting due to its unique electronic and optical properties, as well as suitable conduction and valence band positions for suitable photocatalytic overall water splitting, and it has attracted widespread researcher interest. 
  • 1.0K
  • 25 Jun 2023
Topic Review
Photosensitized Silica Nanoparticles
BODIPY dyes have recently attracted attention as potential photosensitizers. Commercial and novel photosensitizers (PSs) based on BODIPY chromophores (haloBODIPYs and orthogonal dimers strategically designed with intense bands in the blue, green or red region of the visible spectra and high singlet oxygen production) were covalently linked to mesoporous silica nanoparticles (MSNs) further functionalized with PEG and folic acid (FA).
  • 1.0K
  • 08 Jul 2021
Topic Review
Electron Transfer and Proton Loss of Conventional Carotenoids
Carotenoids are a large and diverse group of compounds that have been shown to have a wide range of potential health benefits. While some carotenoids have been extensively studied, numerous others have not received as much attention. In numerous studies, using EPR (electron paramagnetic resonance) techniques in correlation with DFT (density functional theory) calculations, researchers have characterized about 20 conventional carotenoids - their electron transfer from the carotenoid molecule to form the radical cation, and further proton loss from the radical cation to form neutral radicals (radicals with no charge). Several conventional carotenoids are briefly discussed here.
  • 1.0K
  • 28 Jun 2023
Topic Review
Transition Metal Dichalcogenides in Photocatalytic Hydrogen Evolution
Transition metal dichalcogenides (TMDCs) is an emerging class of two-dimensional (2-D) materials that have exhibited great potential in photocatalytic applications owing to their intrinsic properties. They are normally used as cocatalysts together with other semiconductor materials and the junction created between them facilitates charge transfer of the photogenerated electrons and holes. The photocatalytic H2-evolution systems can be enhanced by lengthening the parts of uncovered surface of photocatalyst and delaying the recombination of electron-hole pairs.
  • 1.0K
  • 05 May 2022
Biography
Jesus Vicente de Julián-Ortiz
Bachelor of Chemical Sciences in the specialty of Biochemistry. He did the doctorate program in Organic Synthesis and Fine Chemistry. Doctor of Pharmacy. His initial research focused on the design, synthesis and microbiological tests of new potential drugs against Herpes simplex virus type 1, as well as the design of new potential antimycobacterial agents, including the corresponding activity
  • 1.0K
  • 01 Jun 2023
Topic Review
Theoretical Consideration of Molecular Helicenes and Their Properties
Some theoretical studies of properties of helicenes are considered. It was shown that helicenes are promising molecules for use as components of various nanodevices, due to the continuous π-system having a helical topology. Peripheral modifications of the edges make it possible to change the properties of helicenes over a wide range. The transition to polymeric helicenes is also considered.
  • 1.0K
  • 14 Sep 2023
Topic Review
Neoproterozoic Fold Belts Surrounding the São Francisco Craton
The São Francisco craton and its continuation in Africa, the Congo Craton, constitute Archean–Paleoproterozoic paleocontinents which, via various continental collisions during the Neoproterozoic–Cambrian, formed the western portion of the Gondwana supercontinent. The folded Brasiliano/Pan African belts occur on the margins of the paleocontinents in the form of several superimposed sedimentary basins, showing different types of magmatic arcs (accretionary material) and which, via collisional processes, were transformed into Neoproterozoic–Cambrian orogenic belts.
  • 1.0K
  • 21 Feb 2024
Topic Review
Carbon Quantum Dots Optical
Carbon quantum dots are the materials of a new era with astonishing properties such as high photoluminescence, chemical tuneability and high biocompatibility.
  • 1.0K
  • 22 Mar 2023
Topic Review
Metal Oxide Quantum-Dot-g-C3N4 Nanocomposites
Quantum dots and graphitic carbon nitride (g-C3N4) are essential elements in this science. In contrast to quantum dots, which have enormous potential due to their size-dependent bandgap tunability and effective charge carrier production, g-C3N4 has properties like chemical stability and a configurable bandgap that make it a versatile material for photocatalysis.
  • 1.0K
  • 15 Nov 2023
Topic Review
Applications of Layered Double Hydroxide
Layered double hydroxides (LDHs), a type of synthetic clay with assorted potential applications, are deliberated upon in view of their specific properties, such as adsorbent-specific behavior, biocompatibility, fire-retardant capacity, and catalytic and anion exchange properties, among others. LDHs are materials with two-dimensional morphology, high porosity, and exceptionally tunable and exchangeable anionic particles with sensible interlayer spaces. The remarkable feature of LDHs is their flexibility in maintaining the interlayer spaces endowing them with the capacity to accommodate a variety of ionic species, suitable for many applications.
  • 980
  • 12 Jun 2023
Topic Review
Classic Forcefield Refitted for Energetic Materials
Energetic materials (EM) act as the key chemical activity component in weapon systems, and energetic crystals are the main and functional part therein. Until now, the most widely used energetic crystals have been molecular crystals, including TNT, RDX, HMX, and TATB. The thermal properties, mechanical properties, and chemical reactivity of energetic molecular crystals are of great importance for a whole EM. The classic forcefields (FF) are still useful for typical energetic crystals—i.e., even though they generally have simple potential functions, the accuracy can be ensured by refitting for specific compound. 
  • 964
  • 11 Mar 2022
Topic Review
Porous Polymer Materials in Triboelectric Nanogenerators
Since the invention of the triboelectric nanogenerator (TENG), porous polymer materials (PPMs), with different geometries and topologies, have been utilized to enhance the output performance and expand the functionality of TENGs.
  • 961
  • 15 Nov 2023
Topic Review
Application of Supercritical Fluids in COVID-19
Even though years have passed since the emergence of COVID-19, the research for novel or repositioned medicines from a natural source or chemically synthesized is still an unmet clinical need. There are three main applications of the supercritical fluids in this field: (i) drug micronization, (ii) supercritical fluid extraction of bioactives and (iii) sterilization. The supercritical fluids micronization techniques can help to improve the aqueous solubility and oral bioavailability of drugs, and consequently, the need for lower doses to elicit the same pharmacological effects can result in the reduction in the dose administered and adverse effects. In addition, micronization between 1 and 5 µm can aid in the manufacturing of pulmonary formulations to target the drug directly to the lung. Supercritical fluids also have enormous potential in the extraction of natural bioactive compounds, which have shown remarkable efficacy against COVID-19. Finally, the successful application of supercritical fluids in the inactivation of viruses opens up an opportunity for their application in drug sterilization and in the healthcare field.
  • 955
  • 29 Nov 2022
Topic Review
Materials for Three-Dimensional Bio-Printing
The fast-developing field of three-dimensional (3D) bio-printing has been extensively used to improve the usability and performance of scaffolds filled with cells. To further 3D-printing uses in tissue engineering, research on novel, suitable biomaterials with quick cross-linking capabilities is a prerequisite. A wider variety of acceptable 3D-printed materials are still needed, as well as better printing resolution (particularly at the nanoscale range), speed, and biomaterial compatibility.
  • 955
  • 29 Jan 2023
Topic Review
Two-Dimensional Nanostructures as Surface-Enhanced Raman Scattering Substrates
Two-dimensional nanostructures (2DNS) attract tremendous interest and have emerged as potential materials for a variety of applications, including biomolecule sensing, due to their high surface-to-volume ratio, tuneable optical and electronic properties. Advancements in the engineering of 2DNS and associated technologies have opened up new opportunities. Surface-enhanced Raman scattering (SERS) is a rapid, highly sensitive, non-destructive analytical technique with exceptional signal amplification potential. Several structurally and chemically engineered 2DNS with added advantages (e.g., π–π* interaction), over plasmonic SERS substrates, have been developed specifically towards biomolecule sensing in a complex matrix, such as biological fluids. 
  • 939
  • 11 Jan 2023
Topic Review
Hydrogen Storage Mechanism in Sodium-Based Graphene Nanoflakes
Carbon materials, such as graphene nanoflakes, carbon nanotubes, and fullerene, can be widely used to store hydrogen, and doping these materials with lithium (Li) generally increases their H2-storage densities. Unfortunately, Li is expensive; therefore, alternative metals are required to realize a hydrogen-based society. Sodium (Na) is an inexpensive element with chemical properties that are similar to those of lithium.
  • 930
  • 08 Feb 2022
Topic Review
Transition Metal Anchored on Nitrogen-Doped Porous Carbon Catalysts
The design and preparation of novel, high-efficiency, and low-cost heterogeneous catalysts are important topics in academic and industry research. In the past, inorganic materials, metal oxide, and carbon materials were used as supports for the development of heterogeneous catalysts due to their excellent properties, such as high specific surface areas and tunable porous structures. However, the properties of traditional pristine carbon materials cannot keep up with the sustained growth and requirements of industry and scientific research, since the introduction of nitrogen atoms into carbon materials may significantly enhance a variety of their physicochemical characteristics, which gradually become appropriate support for synthesizing supported transition metal catalysts. The doping of nitrogen atoms improves the physicochemical properties of carbon materials with high specific surface area, abundant porous structure, nitrogen-containing groups, and defect sites, which are the ideal support for the preparation of transition metal heterogeneous catalysts.
  • 891
  • 27 Sep 2022
Topic Review
Fundaments of Electron Transfer in D-B-A Supramolecular Systems
If we were to sort chemical reactions by their importance for life, electron transfer (ET) would be the best candidate to be ranked first. The reasons for its importance lie in the key role it carries out in major biological processes, such as the electron transport chain and photosynthesis, as well as artificial processes, such as information storage (i.e., photography) and energy conversion (batteries). It is worth noting that ET is ubiquitous in all the branches of chemistry, from organic and biochemistry to physical and inorganic chemistry. The systematic study of the ET processes can be fundamental both for basic knowledge and for strongly applicative reasons.
  • 866
  • 01 Jun 2022
Topic Review
Formation of Reactive Species under Electron Irradiation
Electron-induced chemistry is relevant to many processes that occur when ionizing radiation interacts with matter. This includes radiation damage, curing of polymers, and nanofabrication processes but also the formation of complex molecules in molecular ices grown on dust particles in space. High-energy radiation liberates from such materials an abundance of secondary electrons of which most have energies below 20 eV. These electrons efficiently trigger reactions when they attach to molecules or induce electronic excitation and further ionization. 
  • 865
  • 11 Mar 2022
Topic Review
Dynamics Investigation of Prenucleation at Liquid–Metal/Oxide Interfaces
Oxide particles, including magnesia, spinel, and alumina, are inevitably formed in the liquid during liquid–metal handling and casting. They may act as nucleation sites for potential grain refinement. Knowledge about atomic ordering (prenucleation) at liquid–metal/oxide (M(l)/oxide) interfaces is important for an understanding of heterogeneous nucleation during casting. 
  • 848
  • 24 Oct 2022
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