Laser photolysis of silver colloid prepared by citric acid reduction method.
By irradiating a silver colloid, prepared via the citric reduction method, using the second harmonic of a Nd:YAG laser, lambda = 532 nm, with laser fluence more than about 0.2 J/cm(2), we prepared a colloid consisting of small spherical silver nanoparticles with d(p) = 8 nm. The process of particle formation can be divided into three steps. First, large particles that existed in the initial colloid evaporate fully, producing a large amount of silver atoms. Next, primary particles with d(p) = 2-4 nm are formed in mini plumes. Finally, these primary particles grow up to 8 nm, as silver atoms diffuse to them through water.
Pyatenko
Alexander
A
Research Institute of Genome-based Biofactory, National Institute of Advanced Industrial Science and Technology (AIST), Sapporo 062-8517, Japan. alexander.pyatenko@aist.go.jp
Yamaguchi
Munehiro
M
Suzuki
Masaaki
M
D019343:Citric Acid / Q000737:chemistry*; D003102:Colloids / Q000737:chemistry / Q000528:radiation effects*; D007834:Lasers; D046529:Microscopy, Electron, Transmission / Q000379:methods; D010084:Oxidation-Reduction; D010316:Particle Size; D010782:Photolysis; D012680:Sensitivity and Specificity; D012834:Silver / Q000737:chemistry / Q000528:radiation effects*; D013056:Spectrophotometry, Ultraviolet / Q000379:methods; D013997:Time Factors
D003102:Colloids; D019343:Citric Acid; D012834:Silver