Synthesis And Morphology Control Of Ultra Thin Silver Nanowires

In recent years,silver nanowires(AgNWs)have attracted tremendous research attention in the field of nano-materials,owing to their promising applications in flexible touch screens,organic light emitting diodes,and solar cells.This thesis aims to explore the controlled synthesis and growth of AgNWs,we can synthesis of high aspect ratio and ultra thin AgNWs with little amount of Ag nanoparticles(NPs).The main achievements of this thesis are as follows:1.The preparation of AgNWs with little amount of Ag NPsIn the optimal experiment condition,under the polyol method and the coexistence of Cl-and Br-ions,we successfully synthesized ultra thin AgNWs with a diameter of 21 ±2.96 nm,aspect ratio of?1500,and NPs percent of 5.5%wt.We found that the AgC1/AgBr precursor NPs could be mostly removed while secondary seeding does not take place extensively,Which could significant decrease the population of NPs in the product,when the temperature is raised to 180 ? at the nucleation stage,and then cooling it to 160 ? at the growth stage.Moreover,there is not enough room for further decrease of the AgNWs diameter using only Br-ions.2.Realizing the synthesis of very-thin AgNWs in large quantities.After changing the mixing method and reducing concentration of halide ions,we could increase the amount of ultra thin AgNWs solution from 10 mL to 150 mL,and increase the yield from 23%to 40%.Simultaneously,the size of nanowires was nearly unchanged.In addition,After simply washing the synthesized AgNWs,formulating into an aqueous ink,and then preparing transparent conductive film,we could get an excellent transparent conductive film with a transmittance of 91.73%,a haze of 1.62%,a sheet resistance of 59 ? · sq-1,and a sheet resistance non-uniformity factor of 6.65%.