A new meth od for sy nthesis and charact erization of Pt nano colloid an d investigation of nonlinear optical properties of this sample

Studying of nonlinear optical properties of nanocolloids is of recent interest, due to their possible application in future high-capacity comm unication n etworks, optoelectronics and photo nic devices. [۱] The mi croscopic response of m aterials Ȥ<۲ > is related to the magn itude of the molecular nonlinearities. A fundamental requirement for second-order effe cts is noncentro symmetry at the mo lecular level. [۲]Mate rials and methods: At first, we add ۰.۱۲۹ gr of K۲PtCl۶ in ۲۰cc of distilled water, next put t he mixture i n the ultras onic bath. Then solve ۰.۶۴ gr of C۶ H۵O۷Na۳ in ۱۸.۵ cc of distilled wat er and add it over the first mixture, at first the c olor of mixture is yello w. Then solve ۰.۰۰۱ gr o f NaBH۴ with ۱۰ cc of distilled water and drop ۳ to ۴ drops of it inside of the yellow solution and put it in the ultras onic bath for ۳۰ minutes. Then take off the beaker of the inside of the u ltrasonic bath and put it away for ۲ days to for m black sediment in the bottom of the beaker. After ۲ days, we separate the yellow solution o f black sediment then put yellow solution in t he ultrasonic bath for ۵ minutes nex t add ۰.۳۶ g r of ZnCl۲ and ۰.۳۶ gr of Zn(NO۳)۲.۴H۲O over it and put it in the ultras onic bath for ۱ hour. A fter that sol ve ۰.۰۰۱gr o f NaBH۴ in ۱۰ cc of distilled water and drop ۳ to ۴ drops of it over the yellow solution and put it in the ultrasonic bath for about ۲ hours and with co mpletely solving of NaBH۴, the yellow color changes to d ark brown and it causes the formation of Pt nan ocolloid.

کلیدواژه ها:

Nanocolloid ، TE M images ، U V-vis spectra ، Nonline ar optics ، Z- scan