Through ebeam GLAD, i was able to deposit titanium nanoparticles at subtrate temperature 260C and room temperature. The issue here is that while analysing the morphologies of the nanoparticles through some SEM micrographs, some of the nanoparticles sure some branching on the sides especially at substrate temperature at 260C were its more pronounced. Ive attached the micrograph below. Through XRD and HRTEM, ive analysed that the nanocolumns grow in a Bi-axial (1010)[0001] growth. Also in the micrograph, the flux direction is coming from the top of the micrograph.
What are the possible mechanisms other than Diffusion and Shadowing effect that could possibly explain the growth of this structures.
What was the temperature inside the chamber near to the surface of the growing film?
If it was less than 260OC, then a mechanism similar to that of forming the thermal dendrites is possible.
Dr Imad Disher thank you so Much for the response. The temperature measured is from the substrate holder and due to calibration the substrate is approximately at the same temperature as the substrate holder.
Also there’re literatures that I found thatve done the same thing up to temperatures of 750C but failed to describe the mechanism
Dear Abayomi Nasir Yussuf ,
I supposed that the temperatures of the substrate holder, substrate, and the depositing particles are almost the same. Thus, I was asking about the temperature difference between the substrate and the chamber (the environment surrounding the substrate). This difference decides the direction of the heat transfer between the growing particles and their surrounding. If the heat transfers from the growing material to the surrounding, when the temperature of the substrate is higher than that of the chamber, the thermal dendrites mechanism is possible.
Wish you all the best.
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