Nanoparticles-what is it?
Any particle with a size between 1-100 nm is called a nanoparticle.
Due to their small size, they can penetrate through surfaces easily. And they have a hush surface area/volume ratio, so should properties different than bulk like color, catalytic properties, etc.
Image of gold nanoparticles
https://www.mdpi.com/1424-8220/7/12/3299 [Hu, J.; Wang, Z.; Li, J. Gold Nanoparticles With Special Shapes: Controlled Synthesis, Surface-enhanced Raman Scattering, and The Application in Biodetection. Sensors 2007, 7, 3299-3311. https://doi.org/10.3390/s7123299]
Image of silver nanoparticles
TEM images of silver nanoparticles (Parikh RY, Ramanathan R, Coloe PJ, Bhargava SK, Patole MS, Shouche YS, et al. (2011) Genus-Wide Physicochemical Evidence of Extracellular Crystalline Silver Nanoparticles Biosynthesis by Morganella spp. PLoS ONE 6(6): e21401. https://doi.org/10.1371/journal.pone.0021401)
Image of copper nanoparticles
Copper nanoparticles (Dewan M, Kumar A, Saxena A, De A, Mozumdar S (2012) Biginelli Reaction Catalyzed by Copper Nanoparticles. PLoS ONE 7(8): e43078. https://doi.org/10.1371/journal.pone.0043078)
Image of zinc oxide nanoparticles
SEM and TEM images of Zinc oxide nanoparticles (Khan YA, Singh BR, Ullah R, Shoeb M, Naqvi AH, Abidi SMA (2015) Anthelmintic Effect of Biocompatible Zinc Oxide Nanoparticles (ZnO NPs) on Gigantocotyle explanatum, a N eglected Parasite of Indian Water Buffalo. PLoS ONE 10(7): e0133086. https://doi.org/10.1371/journal.pone.0133086)
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