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Topic Review
Application of electrospun nanocomposites on removal of harmful substances
Nanomaterials and nanotechnology will undoubtedly become core materials and technologies in advanced materials and technologies. In recent years, nanomaterials and nanotechnology have been widely used in environmental restoration due to their low cost, high efficiency, and other advantages. In this study, the high-performance polyurethane/rare earth (PU/RE) composite nanomaterials were fabricated via electrospinning. The electrospun nanomaterials for adsorption of volatile organic compounds (VOCs) in air was thoroughly investigated. The PU nanofiber containing 50 wt. % RE powder had the smallest fiber diameter of 356 nm; it also showed the highest VOC absorption capacity compared with other composite membranes, having an absorption capacity about three times greater than pure PU nanofibers.
  • 1.6K
  • 29 Oct 2020
Topic Review
Dendrimers
Today, dendrimers are the main nanoparticle applied to drug delivery systems. The physicochemical characteristics of dendrimers and their versatility structural modification make them attractive to applied as a platform to bioactive molecules transport. Nanoformulations based on dendrimers enhance low solubility drugs, arrival to the target tissue, drugs bioavailability, and controlled release. This review describes the latter approaches on the transport of bioactive molecules based on dendrimers. The review focus is on the last therapeutic strategies addressed by dendrimers conjugated with bioactive molecules. A brief review of the latest studies in therapies against cancer and cardiovascular diseases, as well as future projections in the area, are addressed.
  • 1.6K
  • 17 Sep 2020
Topic Review
Hot dip galvanizing
Hot-dip galvanizing is one of the most effective methods of protecting steel against corrosion. It allows one to obtain good quality coatings, ensuring long-term protection with relatively low operating costs of the coatings.
  • 1.6K
  • 29 Oct 2020
Topic Review
Applications of Zinc Oxide Nanoparticles in Food/Agriculture
Zinc oxide nanoparticles (ZnO-NPs) have gained significant interest in the agricultural and food industry as a means of killing or reducing the activity of microorganisms. The antibacterial properties of ZnO-NPs may improve food quality, which has a direct impact on human health. ZnO-NPs are one of the most investigated inorganic nanoparticles and have been used in various related sectors, with the potential to rapidly gain attention and increase interest in the agriculture and food industries. 
  • 1.6K
  • 20 Apr 2023
Topic Review
Chemical Industry in China
The chemical industry in China is one of China's main manufacturing industries. It valued at around $1.44 trillion in 2014, and China is currently the largest chemicals manufacturing economy in the world. The chemical industry is central to modern China's economy. It uses special methods to alter the structure, composition or synthesis of substances to produce new products, such as steel, plastic, and ethyl. Chemical industry provides building materials for China's infrastructure, including subway, high-speed train, and highway. Prior to 1978, most of the product was produced by the state-owned business, and the share in product outputted by state-owned business had decreased in 2002. The Chinese chemical industry is also one of the world's largest producers of both controlled and non-controlled precursor chemicals used in the Global illicit drug trade, particularly in the Golden Triangle as well as Latin America.
  • 1.6K
  • 26 Oct 2022
Topic Review
Inverse Design for Silicon Photonics
Silicon photonics enables massive fabrication of integrated photonic devices at low cost, due to its compatibility with complementary metal oxide semiconductor (CMOS) process. It has emerged as one of the most important technologies for data communication and computations, as integrated electronic circuits are reaching their limits as well as incurring high energy costs. Recently, it has also shown the potential for other applications such as sensing and light detection and ranging (LiDAR). For miscellaneous silicon photonic devices, their versatile functions mainly come from design of device geometry. Intuitively, the design of single component with specific function is fulfilled by physics-based methods like analytical models, prior practical experiences and scientific intuitions. However, the physics-based methods are laborious and have high requirements on designers’ experience. Furthermore, the performance evaluation of light-material interaction with complicated geometries has to rely on numerical electromagnetic (EM) simulations, as the computation for irregular geometry is often non-intuitive. To make the design process more efficient, inverse design approaches have been introduced, which are assisted by various iterative optimization methods and deep neural networks (DNNs).
  • 1.6K
  • 11 May 2021
Topic Review
[18F]Difluoromethyl Heteroaryl-Sulfones
The suitability of the 18F radioisotope in positron emission tomography (PET) demanded novel approaches for 18F-fluorination and 18F-fluoroalkylation. The difluoromethyl (CF2H) group has gained increasing attention in medicinal chemistry due to its lipophilic hydrogen-bond donor properties. In non-radioactive chemistry, difluoromethyl heteroaryl-sulfones has been extensively used in difluoromethylation of substrates bearing C=C, C≡C, and C≡N bonds by visible light photoredox catalysis. Herein, we highlight our recent work on the synthesis of [18F]difluoromethyl heteroaryl-sulfones with improved molar activities and their application in photoinduced C-H 18F-difluoromethylation of N-containing heteroarenes via a radical-mediated pathway.
  • 1.6K
  • 25 Aug 2021
Topic Review
Multilayer Ceramic Capacitors and Its Fabrication Process
The high performance, multi-functionality, and high integration of electronic devices are made possible in large part by the multilayer ceramic capacitors (MLCCs). Due to their low cost, compact size, wide capacitance range, low equivalent series inductance (ESL) and equivalent series resistance (ESR), and excellent frequency response, MLCCs play a significant role in contemporary electronic devices.
  • 1.6K
  • 20 Mar 2023
Topic Review
Boron-Silicon Junction
The discovery of the extremely shallow amorphous boron-crystalline silicon heterojunction occurred during the development of highly sensitive, hard and robust detectors for low-penetration-depth ionizing radiation, such as ultraviolet photons and low-energy electrons (below 1 keV). For many years it was believed that the junction created by the chemical vapor deposition of amorphous boron on n-type crystalline silicon was a shallow p-n junction, although experimental results could not provide evidence for such a conclusion. Only recently, quantum-mechanics based modelling revealed the unique nature and the formation mechanism of this new junction. Here, the entry reviews the initiation and the history of understanding the a-B/c-Si interface (henceforth called the “boron-silicon junction”).
  • 1.6K
  • 17 Jun 2021
Topic Review
Ag2O–MnO2/Graphene Oxide Nanocomposite
Catalytic oxidation of alcohol to their analogous carbonyls is one of the key organic reactions in both scientific and industrial applications, with universal production of 10,000 million tons/year of carbonyls in the 20th century. Such as, aldehyde and ketone derivatives are extensively employed as precursors in insecticide, flame-retardant, cosmetic, confectionery, flavoring, pharmaceutical, and beverage industries. 
  • 1.6K
  • 27 Oct 2020
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