Ashraf Ali El-Saftawy

9 Questions 39 Answers 0 Followers

Questions related from Ashraf Ali El-Saftawy

How to get rid of loosely grains from thin film surface ?

I have thin film sample for Ag, when I make AFM for them, some loosely grains on the surface attached to the cantilever resulting in bad line in the micrographs. So how to get rid of these grains...

10 October 2016 7,184 10 View

Which surface is affected by gamma radiation?

In gamma irradiation of polymer experiment, which surface is more influenced, the entry or the exit surface and why? and when the film thickness is in micro range, is that make difference? or is...

02 February 2016 2,020 13 View

“Depth must be hidden. Where? On the surface.”

“Depth must be hidden. Where? On the surface.”Hugo von Hofmannsthal from Buch der Freunde (1922). to what extent do you agree to this sentence? does surface really reveals the actual properties...

12 December 2015 7,247 3 View

What is the difference between top down and bottom up methods for creating nano-structures?

Although there are many special techniques to fabricate nanosized structures, generally these methods can be classiﬁed as top down and bottom up methods. Please give some examples and details?

01 January 2015 2,612 17 View

What is the difference between dewetting and rupture of thin films?

please give some details and recommend a ref to understand the detailed mechanisms.?

01 January 2015 6,974 2 View

How to intrepet the color change of polymers upon irradiation with ionizing radiation?

and is there a free software that calculate the tristimulus valus and color change? also please provide a reference?

10 October 2014 4,080 20 View

How do you extract data from the produced images in TRIM code?

how to extract data from TRIM images to be handled with other program?

09 September 2014 4,352 0 View

How to calculate the wettability of powder?

and how the particle size affect the wettability, is there and established model for that?

09 September 2014 460 1 View

How do I calculate the refractive index of polymer from UV.vis spectrum?

Please give some detail?

09 September 2014 3,745 8 View