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Normally, metals absorb very little in the visible light spectrum, and are thus highly reflective. This is the case with bulk (non-nano) gold. However, at very small particle sizes (~2-150nm) have high electron densities at their surfaces called surface plasmons, which interact with light through surface plasmon resonance.
Depending on the particle size, the surface plasmons' effect varies. At small diameters, these electrons strongly absorb green light (wavelength of about 520nm) and as the diameters grow larger, the surface plasmons absorb higher energy light. As the the nanoparticles get larger, their characteristics approach those of the bulk substance.
What else can I help you with?
What is the size of the nanogold particles?
x10^-9m
What is the color gold?
The colour gold is a sort of shiny yellow colour.
What colour is gold in french?
The color gold in French is "or."
What colour is pure gold?
Gold
What colour is the world cup?
It is gold in color as it is made of gold.
Does lead look like gold?
Lead is a dullish grey colour whereas gold - is well - gold in colour. Unless it's white gold, but still it looks nothing like lead.
What is zirconium's origin name?
Zargûn in old Persian is gold colour; zirconium silicate as gemstone has sometimes this colour.
What colour is super sonic?
he is gold
Is gold yellow in colour?
kinda
What is the other name of tiny particles of gold?
Tiny invisible particles are called an atom. Everything is made up of atoms. Atoms are further divided into protons electrons and neutrons. These sub-atomic particles are now known to be made up of quarks.
How do you say the colour gold in french?
the color is "or".
What colour is gold iodide?
Gold iodide is a bright yellow solid.
