El- Sayed, Review of some interesting surface plasmon resonance-enhanced properties of noble metal
nanoparticles and their applications to biosystems, Plasmonics, 2, 107 (2007).
such as Au, Pd, and Ag are essential in the modern life and applied in various fields such as jewelry , synthetic catalysts [2-5], and materials for electronic industry .
As an important aspect, organometallic intermediates formed on noble metal
have the advantage that bond formation is reversible.
These adatoms are alkali and alkaline-earth atoms, nonmetallic atoms, noble metal
atoms, and transition-metal atoms:
As it is well known, the most noble metals
in a galvanic table are usually precious metals.
Additionally, modification of Ti[O.sub.2] with noble metal
nanoparticles (NPs) such as gold and silver, which exhibit plasmon absorption band at 560 nm (Au) and 410 nm (Ag), is beneficial, due to enabling the absorption of visible light in a wider range of wavelengths and thus with higher levels of activity .
If there are any cracks or pores, then the electroless nickel will behave as a very noble metal
, and will accelerate the attack on the base metal.
The most effective approach to suppress charge-carrier recombination in the photocatalysis process is to incorporate noble metal
(Au, Ag, or Pt) into Ti[O.sub.2] [7-10].
During the past few decades, many researchers  from various fields of science have been involved in the synthesis of noble metal
nanoparticles for physics, chemistry, biology, and medicine applications .
A Alkali metal B Inert gas C Noble metal
D Lanthanide 9.