Effect of Sn doping on the growth and optical properties of AgI nanoparticles.
Controlled iodization and Sn doping of vacuum-evaporated Ag films has helped understand the initial-stage kinetics of AgI nanoparticle growth under ambient conditions. Use of XRD, optical spectroscopy, and AFM has unravelled systematic correlation between Sn-induced disorder in Ag crystal structure, nanoparticle size, and exciton growth dynamics. Sn doping of Ag leads to three specific effects: removal of UV absorption minimum in Ag, introduction of a plasmon-type absorption in the red region, and a reduction in particle size in thicker (than 10 nm) films (but an increase in particle size in 10 nm films) relative to that in undoped Ag films.
Mohan
D Bharathi
DB
School of Physics, University of Hyderabad, Hyderabad 500 046, Andhra Pradesh, India.
Sunandana
C S
CS
D003460:Crystallization / Q000379:methods; D007454:Iodides / Q000032:analysis / Q000737:chemistry* / Q000528:radiation effects; D008027:Light; D049449:Luminescence; D008422:Materials Testing; D049329:Nanostructures / Q000032:analysis / Q000737:chemistry* / Q000648:ultrastructure*; D010316:Particle Size; D010777:Photochemistry / Q000379:methods*; D012666:Semiconductors; D018030:Silver Compounds / Q000032:analysis / Q000737:chemistry* / Q000528:radiation effects; D012996:Solutions; D014001:Tin / Q000032:analysis / Q000737:chemistry* / Q000528:radiation effects
D007454:Iodides; D018030:Silver Compounds; D012996:Solutions; D014001:Tin; C030584:silver iodide