Syed Ali Hassan

13 Questions 34 Answers 0 Followers

Questions related from Syed Ali Hassan

Sample preparation on TEM mesh grids with thickness of about 30 to 50nm of metal dichalcogenides?

I am looking forward to have some expert opinions about mechanical methods for sample preparation on TEM grids (single hole or mesh). Ultramicrotome and simple scotch type technique are mostly...

28 April 2021 1,082 4 View

Why Pt can not be deposited on Si substrate for the application of electrocatalytic applications?

Mostly ceramic substrates (MgO, STO, LaAlO3 etc..) are used to deposit transition Metals (Pt,Ag,Au,Cu) for the electrochemical applications. Why Silicon Substrate can not be used for such...

28 March 2017 6,318 6 View

How to calculate the interfacial energy of dielectric substrates??

So my question is related Interfacial enegry calculation.If i have MgO substrate and we deposited Pt thin films on it.. I need to know the MgO surface energy before deposition? is there any...

05 March 2017 7,315 3 View

How to calculate the Crystal size and Strain in thin films by Williamson–Hall analysis?

I know there is lots of discussion. kindly send the most detailed link in which i can calculate easily.. please

25 February 2017 3,675 11 View

Why XRD patterns are indicating that Pt (110) and (111) are formed on MgO substrate but AFM shows some inappropriate structures?

Pt films deposited on MgO (110) and (111) were grown , as a result no elongated features and traces on MgO (110) and (111) were observed . Instead it was seen that a disordered 3 dimensional...

19 January 2017 1,447 3 View

By Increasing the substrate temperature (Rt to 600c) we observe increase in the Peak Area graph from XRD 2theta analysis, What does that mean?

The intensity of the Graph is increasing with respect to temperature. If i plot a graph with respect to Area of that peak and temperature I observe also increase in area. what does that mean? If...

17 November 2016 9,725 10 View

Why surface morphology changes by changing the Concentrations of depositing alloy and Orientation of the substrate??

I am observing a drastic change in Surface morphology of NiFe thin films (grown by PLD). 1.By changing the Concentration of Ni in NiFe thin films 2. By changing the Orientation of the MgO...

08 November 2016 3,080 7 View

How can we estimate about the deposition rate of material of PLD deposited thin films??

If I know the thickness of the film (15nm). How I can justify about the deposition rate of the material ? Which formula or which method?? Please help

01 November 2016 1,235 4 View

Can any AFM expert suggest me any software from which i can simulate an AFM surface and run conductive measurement test?

I am searching for the software that allows me to make the afm simulated image and on that image after putting all required parameter of grains size heights and etc, i can obtain the similar...

30 October 2016 5,356 3 View

Why shift in peak position occurs in XRD ?

I have deposited Pt (platinum) by using PLD (pulse laser deposition) on MgO substrate. I change the substrate temperature form RT to 600c , I observe a change in FWHM (which was increasing with...

08 September 2016 3,487 23 View

How to reduce splashing problem during the pulse laser ablation in liquid?

I am having splashing problem during my PLAL experiment, how I can reduce it?

07 August 2016 1,127 7 View

How to clean the MgO and Si substrates before deposition of thin films ?

Any body know that how to clean the Substrates of MgO and Si with onside Polished. There are several method that i know about like put the substrate in Nitrogen environment for long duration,...

23 March 2016 4,671 9 View

How nano particles are generated in liquids by Laser ablation?

I just need what happens during laser matter interactions in liquids which leads towards nano particles?

19 February 2016 8,746 3 View