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Topic Review
Titanium Dioxide for Water Purification
Titanium dioxide (TiO2), one of the most frequently used materials in general, has emerged as an excellent photocatalytic material for environmental applications. Here, principles and mechanisms of the photocatalytic activity of TiO2 have been analyzed. Structural and physical specificities of TiO2 nanoparticles, such as morphology, crystal structure, and electronic and optical properties, have been considered in the context of photocatalytic applications.
  • 1.4K
  • 16 Jan 2023
Topic Review
Non-Covalent Interactions
A non-covalent interaction differs from a covalent bond in that it does not involve the sharing of electrons, but rather involves more dispersed variations of electromagnetic interactions between molecules or within a molecule. The chemical energy released in the formation of non-covalent interactions is typically on the order of 1-5 kcal/mol (1000–5000 calories per 6.02 x 10^23 molecules). Non-covalent interactions can be classified into different categories, such as electrostatic, π-effects, van der Waals forces, and hydrophobic effects. Non-covalent interactions are critical in maintaining the three-dimensional structure of large molecules, such as proteins and nucleic acids. In addition, they are also involved in many biological processes in which large molecules bind specifically but transiently to one another (see the properties section of the DNA page). These interactions also heavily influence drug design, crystallinity and design of materials, particularly for self-assembly, and, in general, the synthesis of many organic molecules. Intermolecular forces are non-covalent interactions that occur between different molecules, rather than between different atoms of the same molecule.
  • 1.4K
  • 16 Nov 2022
Topic Review
Gum Tragacanth
Gum tragacanth (GT) is recently showing great promise as a therapeutic substance in tissue engineering and regenerative medicine.
  • 1.4K
  • 29 Jun 2021
Topic Review
Citric Acid Derived Carbon Dots
Carbon Dots (CDs) are a kind of 0-D emissive spheroidal carbon-based nanostructures with a size smaller than 20 nm. The CDs, in fact, stand in between organic (polymers) and inorganic materials (black carbon), macromolecules, and nanoparticle, between bottom-up (polycyclic aromatic compounds) and top-down synthesis (laser ablation of graphene, etc.).
  • 1.4K
  • 01 Feb 2021
Topic Review
Thermochromic Hydrogel Smart Windows
Thermochromic smart windows technology can intelligently regulate indoor solar radiation by changing indoor light transmittance in response to thermal stimulation, thus reducing energy consumption of the building. In recent years, with the development of new energy-saving materials and the combination with practical technology, energy-saving smart windows technology has received more and more attention from scientific research.
  • 1.4K
  • 14 Mar 2022
Topic Review
Laser Shock Processing
Laser shock processing (LSP) is an advanced material surface hardening technology that can significantly improve mechanical properties and extend service life by using the stress effect generated by laser-induced plasma shock waves, which has been increasingly applied in the processing fields of metallic materials and alloys.
  • 1.4K
  • 27 Oct 2020
Biography
Greg Winter
Sir Gregory Paul Winter CBE FRS FMedSci (born 14 April 1951)[1][2] is a Nobel Prize-winning British biochemist best known for his work on the therapeutic use of monoclonal antibodies. His research career has been based almost entirely at the MRC Laboratory of Molecular Biology and the MRC Centre for Protein Engineering, in Cambridge, England. He is credited with invented techniques to both human
  • 1.4K
  • 16 Nov 2022
Topic Review
Nanocellulose-Based Materials for Water Treatment
Nanocelluloses are promising bio-nano-materials for use as water treatment materials in environmental protection and remediation. This review aims at giving an overview of nanocellulose requirements concerning emerging nanotechnologies of waster treatments and purification, i.e., adsorption, absorption, flocculation, photocatalytic degradation, disinfection, antifouling, ultrafiltration, nanofiltration, and reverse osmosis. 
  • 1.4K
  • 23 Nov 2021
Topic Review
Opal
Opal is a hydrated amorphous form of silica (SiO2·nH2O); its water content may range from 3 to 21% by weight, but is usually between 6 and 10%. Because of its amorphous character, it is classed as a mineraloid, unlike crystalline forms of silica, which are classed as minerals. It is deposited at a relatively low temperature and may occur in the fissures of almost any kind of rock, being most commonly found with limonite, sandstone, rhyolite, marl, and basalt. The name opal is believed to be derived from the Sanskrit word upala (उपल), which means 'jewel', and later the Greek derivative opállios (ὀπάλλιος), which means 'to see a change in color'. There are two broad classes of opal: precious and common. Precious opal displays play-of-color (iridescence); common opal does not. Play-of-color is defined as "a pseudo chromatic optical effect resulting in flashes of colored light from certain minerals, as they are turned in white light." The internal structure of precious opal causes it to diffract light, resulting in play-of-color. Depending on the conditions in which it formed, opal may be transparent, translucent, or opaque, and the background color may be white, black, or nearly any color of the visual spectrum. Black opal is considered the rarest, while white, gray, and green opals are the most common.
  • 1.4K
  • 24 Oct 2022
Topic Review
Nanoparticles as Electroactive Labels
Nanoparticles are emerging materials with outstanding potential for their use as labels in electrochemical immunosensing. Gold, silver and  quantum dots are the main components of such particles, thanks to their direct electroactivity (redox properties). Protein biomarkers of a variety of diseases, including tumour cells, are the target analytes on which such electrochemical immunosensors have been mostly applied.
  • 1.4K
  • 13 Oct 2021
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