What is metallic nanoparticles?5 answersMetallic nanoparticles are a special class of materials with sizes ranging from 1 to 100 nm, possessing unique properties influenced by their size, shape, and structure. These nanoparticles have garnered significant attention due to their fascinating optical, electrical, magnetic, and catalytic properties, making them versatile for various applications such as in nanotechnology, coatings, nanolubrication, catalysis, and biomedical sciences. Synthesis methods for metallic nanoparticles include top-down and bottom-up approaches, with chemical reduction being a common method due to its simplicity, cost-effectiveness, and ability to produce nanoparticles in a homogenous shape. Additionally, metallic nanoparticles have shown promise in bioremediation efforts, with nanotechnology offering sustainable solutions for environmental pollutant remediation through nano-bioremediation using nanoparticles with high surface energy and adsorption capabilities.
Can plant extracts be used to functionalize metallic nanoparticles?4 answersPlant extracts can be used to functionalize metallic nanoparticles. The extracts contain bioactive phytochemical compounds that act as reducing and capping agents in the synthesis of nanoparticles. These compounds, such as flavonoids, alkaloids, and phenols, play a vital role in the production of nanoparticles and contribute to their stability and size control. The plant extracts also exhibit antimicrobial activity, antioxidant activity, and drug delivery ability, making them suitable for various applications. Additionally, the extracts offer a safer and more environmentally friendly alternative to conventional synthesis routes that use hazardous chemicals. The synthesis of metallic nanoparticles using plant extracts has been successfully demonstrated for various metals, including silver and gold. Overall, plant extracts provide a promising and sustainable approach for functionalizing metallic nanoparticles.
Why is gold nanoparticle a promising material in material science?3 answersGold nanoparticles are considered promising materials in material science due to their tunable properties, chemical inertness, and outstanding physiochemical and optical properties. They have led to numerous advances in nanomaterial-based sensors, biomedical technologies, drug delivery, cancer therapy, biomolecule detection, and high-accuracy diagnosis. Gold nanoparticles also exhibit a plasmon effect and unique localized surface plasmon resonance, making them suitable for applications in plasmonics, sensing, biology, and medicine. Additionally, gold nanoparticles have a wide range of potential applications due to their unique size, shape, and properties. They can be synthesized using various methods such as chemical procedures, electrochemical synthesis, and wet-chemical synthesis. The ability to control the size and shape of gold nanoparticles is crucial for their performance in different applications, and recent advancements in crystal phase control have further enhanced their physicochemical properties and potential applications, including catalysis.
What is the property of metal matrix nanocomposite?5 answersMetal matrix nanocomposites have properties such as improved wear resistance, specific strength/stiffness, corrosion resistance, high temperature strength, damping properties, enhanced mechanical characteristics, and reduced weight. These composites are versatile and promising materials for various industrial applications, including aerospace, automotive, and biomedical engineering. They offer higher output volumes, improved environmental and mechanical strength, increased wear resistance, and lower CO2 emissions and pollution in the automotive sector. The addition of nanoparticles, such as zirconium silicate, carbon nanotubes, carbon nanospheres, graphene, graphene oxide, and reduced graphene oxide, enhances the properties of metal matrix composites. The use of metal nanocomposites in auto parts manufacturing results in lightweight and durable components with exceptional mechanical, tribology, and corrosion resistance properties. These nanocomposites also exhibit improved microstructural, mechanical, tribological, and anti-corrosion characteristics in electrodeposited coatings.
What are the disadvantages of metallic nanoparticles?5 answersMetallic nanoparticles have several disadvantages. One major concern is their potential adverse effects on the structure, stability, and function of metabolic enzymes. Copper (Cu) nanoparticles, in particular, have been found to have significant adverse effects on metabolic enzymes, while zinc (Zn) nanoparticles have moderate effects. Another disadvantage is the risk of nanoparticles causing changes in surface properties, which can affect their reactivity and surface area. Additionally, there are concerns about the safety and environmental impact of nanoparticles, especially in terms of occupational and environmental exposure. Furthermore, the use of metallic nanoparticles in composite aircraft structures may lead to low electromagnetic shielding at high frequencies, which can pose a threat to the immunity of the aircraft.
There are any kind of metal nanocomposite applied in electrochemical applications?5 answersMetal nanocomposites have been extensively used in various electrochemical applications. Transition metal oxide-derived nanocomposites have shown enhanced sensing performances due to their good biocompatibility, high organic capturing ability, strong electrocatalytic activity, and high robustness. Metal and metal oxide nanoparticles have been used as nanocomposites with functionalized materials such as conduction polymers, graphene, carbon nanotubes, and other carbon families for electrochemical applications, resulting in extraordinary responses in fields such as electrochemical sensors, fuel cells, solar cells, supercapacitors, batteries, and CO2 reduction. Metal nanoparticle-based electrocatalysts, including metal nanoparticle-based electrocatalysts synthesized using ionic liquids, have been widely used in electronic devices for various electrochemical reactions. Metal-organic framework (MOF)-derived phosphides have also been explored as electrode materials in electrocatalysis for energy-related applications. These advancements in metal nanocomposites have led to improved electrochemical sensing capabilities, including high sensitivity, selectivity, and stability.