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By: R. M. Aadarsh Vel and S. Ravichandran.
1BBA Student, Department of Airlines & Airport Management, Lovely Professional University, Jalandhar, Punjab, India
2Professor and Head, Department of in Chemistry, St. Peter’s Institute of Higher Education and Research, Chennai, Tamil Nadu, India
Nanomaterials are typically described as engineered substances possessing at least one dimension between 1 and 100 nm. Materials at the nanoscale display distinctive or enhanced characteristics, such as increased chemical reactivity, superior sensing performance, and improved mechanical properties. Nanotechnology provides a straightforward, rapid, clean, and cost-effective approach for synthesizing a wide range of organic compounds, encouraging many researchers to transition from conventional synthetic techniques. This article aims to highlight the fundamental concept of nanomaterials, their methods of preparation, and their overall significance.The synthesis of nanomaterials can generally be categorized into two major strategies: top‑down and bottom‑up approaches. In the top‑down method, bulk materials are reduced to nanoscale dimensions through processes such as milling, lithography, and etching. Conversely, the bottom‑up approach involves assembling nanostructures from atoms or molecules using techniques like chemical vapor deposition, sol‑gel methods, and green synthesis. Among these, green synthesis has attracted considerable interest due to its environmentally benign nature, employing plant extracts, microorganisms, or other biological agents to fabricate nanoparticles without harmful chemicals. The exceptional properties of nanomaterials are largely attributed to their high surface area‑to‑volume ratio along with quantum mechanical effects. These factors strongly affect their optical, electrical, magnetic, and catalytic properties. Consequently, nanomaterials have wide‑ranging applications across fields such as healthcare, electronics, environmental management, and energy systems. For example, in medicine, nanoparticles are widely utilized in targeted drug delivery, imaging, and diagnostic applications. Similarly, in environmental applications, they are effectively used in water treatment and pollution control by facilitating the removal of contaminants. Furthermore, nanotechnology has revolutionized catalysis by providing highly active and selective catalysts, thereby improving reaction efficiency and reducing waste generation. Despite these advantages, concerns regarding toxicity, environmental impact, and safe handling of nanomaterials must be carefully addressed. Therefore, ongoing research is essential to ensure the sustainable development and responsible use of nanotechnology in the future
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