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Questions related from Shamsul Arafin
Could anyone tell me how to clean the surface of the ceramic substrates prior to depositing metals, where the substrate is patterned by the photoresist for lift-off? I am mainly concerned by some...
08 August 2015 9,927 2 View
For coating the ceramic AlN substrate with Au using e-beam evaporator, what metal layer should be used at first as an adhesion-promoter? Is it Ti? In fact, I evaporated Ti/Au(20 nm/800 nm) on...
04 April 2015 9,117 8 View
To evaluate the material quality, I have measured the XRD of my as-grown structures by performing theta-2theta (TTH) scan which exhibits poly-crystallinity as shown in the attached file. I have...
08 August 2014 2,101 54 View
I would like to know how thin metal film on top of CVD graphene/SiO2/Si substrates can be uniformly deposited by e-beam evaporation. Are there any challenges? In fact, such thin metal layer will...
08 August 2014 4,948 5 View
As it is known that 60 degree dislocation is the most common type of threading dislocation for GaAs on Si(001). Its density is defined by the following analytic function: D = (beta/3b)2 b = length...
07 July 2014 3,827 1 View
When people report on epitaxial graphene on SiC(001) in the literature, does it mean that as-grown graphene has single-domain? What does the term, 'single-domain' mean? When we say,...
06 June 2014 1,566 2 View
Can anyone tell me whether the dry etching (ICP plasma ) can damage the CVD graphene which is buried under the uniform 25 nm Al2O3 layer? Can the plasma penetrate into the graphene covered by 25...
03 March 2014 2,387 6 View
I am wondering whether the stronger solvents like NMP, PG remover AZ300T, Alleg380 (compared to acetone) can help removing the PMMA residue from CVD graphene surface after it is tranferred into...
03 March 2014 5,141 1 View
Like metals, is Ea/Ec (ratio of absorption energy to bulk cohesive energy) also a good figure of merit to determine the growth morphology of compound material / compound semiconductor on graphene?...
12 December 2013 5,763 4 View
I would like to use graphene film as a substrate material lying on SiO2/Si. For predicting the growth mode, I would need to know the width of atomically flat terrace. As it is known, the substrate...
12 December 2013 2,642 1 View
As we know, there are different scanning modes like 2theta scan (scanning of the diffracted beam) and 2theta/omega (scanning of the incident and diffracted beam). My question is what additional...
11 November 2013 1,822 10 View
Does anyone have experience with it? I would like to know what is meant by molten KOH? Is it different from KOH solution? In particular, I would like to determine the etch pit density of my...
08 August 2013 4,512 5 View
