Synthesis and characterization of Ag and Cu nanorods and thermal conductivity investigation of nanofluids containing synthesized nanorods

In this paper, we synthesized the Ag and Cu nanorods and investigated the thermal conductivity behavior of nanofluids containing of them. The samples have been characterized by Xray diffraction (XRD) and transmission electron microscopy (TEM). XRD results revealed that the crystalline structure of Ag and Cu nanorods with cubic structure were formed. TEM image showed that the synthesis of Ag and Cu leads to the rod structures. The experimental results of termal conductivity showed that by increasing the temperature in the range of from 20 to 60°C and weight fraction from 0.25 to 0 %wt, thermal conductivity of all nanofluids increased. Meanwhile, it can be observed that the minimum and maximum thermal conductivity of Ag nanofluid were 0.56 W/m.K and 2.93 W/m.K respectively, and in the Cu nanofluid were 0.33 W/m.K and 2.74 W/m.K. The results of thermal conductivity behavior of nanofluids revealed that the thermal conductivity of all nanofluids, increases with temperature and weight fraction. However the influence of temperature is more significant than that of weight fraction.