5 to 0.9 V in a square waveform with 1 Hz frequency. In the electrodeposition process, there was a balance between the ion supply and ion consumption, which decided the range of nucleation regions at the growth tip. The potential determined

the ion consumption; meanwhile, it also led the ion supply in the electrolyte. When the Belinostat clinical trial applied voltage was changed to 0.9 V, the previous balance between the supply of cations and the consumption of cations in the front area of the growth tip was broken. The increased potential learn more would quicken the reduction rate of cations and change the distribution of electrical field at the tip of the nanowire. Once the electromigration did not provide enough ions for the consumption, the nucleation regions would shrink. Figure  3a showed

the distribution of the computed electric field vector near the tips of the nanowire array Poziotinib model at 0.9 V. The computed results indicated that the electric field would become concentrated at the forehead of the whole growth tip. The distribution of electric field was uniform in the whole arrays and would make the nucleation regions shrink at every growth tip of the arrays. The distribution of electric field intensity would decide the locations of cations arriving in the electrolyte. Generally, the nucleation would not occur until the number of cations reached a certain amount. According to the distribution of the computed electric field vector at 0.9 V, the intense region of the electric field was from about 0.08 to 0.12 at the growth tip. Comparing the SEM image of the nanostructures and the distribution of the computed electric field vector, the suitable field intensity range of the nucleation regions should be from 0.082536 to 0.123804. So, the diameter of the followed growth part became thin. When the applied voltage was changed to 0.5 V from 0.9 V, the distribution of the computed electric field vector

near the tips of the nanowire array model was shown in Figure  3b. The migrating ions would be redistributed at the different locations of the nanowire tip according to the distribution of electric field at the tip of the nanowire. According to the same electric field intensity span range of the nucleation regions, the electric field intensity range of the nucleation L-NAME HCl regions at the growth tip should be from about 0.069289 to 0.017384 at 0.5 V. The range in Figure  3b showed that the nucleation regions had extended to both sides of the tip from the growth tip when the applied voltage was changed to 0.5 V from 0.9 V. The migrating ions could first arrive at the region and start to be deoxidized. The lateral lower electric field intensity regions at the growth tip would not nucleate because of the shortage of cations. So, the diameter of the followed growth part would become wider gradually. The computed results exactly simulated the distribution of electric field intensity at the tip of the nanomaterials and coincided with the actual growth conditions of the nanomaterials.