https://padlet.com/ella_johnson1/h3h5prm2g076 by ella johnson 10ACX Science en-us 2017-08-28 00:00:10 UTC 2017-08-28 00:19:33 UTC hello@padlet.com ella_johnson1 https://padlet.com/ella_johnson1/h3h5prm2g076/wish/183008253 The first thorough fundamental studies with "nanoparticles" took place in the USA by Granqvist and Buhrman, and Japan, (within an ERATO Project)  they were called "ultrafine particles" 
Nanoparticles were used by artisans as far back as Rome in the fourth century in the famous Lycurgus cup made of dichroic glass as well as the ninth century in Mesopotamia for creating a glittering effect on the surface of pots.
Metallic luster decorations of glazed ceramics appeared in Mesopotamia during the 9th century. These decorations showed amazing optical properties due to the presence of separate silver and/or copper nanoparticles dispersed within the outermost layers of the glaze 

]]> 2017-08-28 00:04:26 UTC https://padlet.com/ella_johnson1/h3h5prm2g076/wish/183008253 ella_johnson1 https://padlet.com/ella_johnson1/h3h5prm2g076/wish/183009397 Color – Nanoparticles of yellow gold and gray silicon are red in color
Gold nanoparticles melt at much lower temperatures (~300 °C for 2.5 nm size) than the gold slabs (1064 °C)
Absorption of solar radiation in photovoltaic cells is much higher in nanoparticles than it is in thin films of continuous sheets of bulk material - since the particles are smaller, they absorb greater amount of solar radiation]]> 2017-08-28 00:17:28 UTC https://padlet.com/ella_johnson1/h3h5prm2g076/wish/183009397