Albert Guirguis

14 Questions 19 Answers 0 Followers

Questions related from Albert Guirguis

What is the relation K factor of Scherrer equation and the shape of particle?

The Scherrer equation, in X-ray diffraction and crystallography, is a formula that relates the size of sub-micrometre particles, or crystallites, in a solid to the broadening of a peak in a...

07 July 2018 7,101 1 View

Does GO has its functional groups on the surface or edge?

For graphene guys, I was wondering if the functional groups decorated the basal plane of graphene oxide or the edge? I would say that there are some of edge and other on the surface, please...

06 June 2018 3,049 0 View

What is the most worst catalyst for CVD graphene?

According to your experience, please advise me about the worst catalyst (substrate metals) can use to growth graphene via CVD?

02 February 2018 764 6 View

How can we measure the thickness of the thin film using the atomic force microscope?

I created some films of graphene oxide using spin coating technique and I want to know how we can measure the thickness of these films using atomic force microscopy experimentally, or from 2D/3D...

11 November 2017 9,637 3 View

Do anyone have the soft copy of JCPDS card No.75-1621?

I am really looking for a soft version of JCPDS card No.75-1621 that is mainly to identify the carbon nanomaterial via XRD

09 September 2017 7,472 1 View

What is the optimal rpm of spin coating to get 10 nm Graphene oxide thin film ?

I want to use spin coating to make 10 nm of GO

06 June 2016 2,874 0 View

Which Graphite particle size is more suitable for producing graphene using Wet chemical method 20 or 150 Micrometer?

Graphene wet chemical method

02 February 2016 6,075 1 View

Can any help me to prepare 8 mol/L of Nitric acid?

I tried to prepare 10ml solution of 8 mol/L of Nitric acid as fellow Wt (mgm) = M* V(ml)* Mwt then Wt(gm)=8*10*63.01= 5040.8 volume (ml)=Wt/density = 5040.8/1.41= 3575= 3.57 L ( which is not...

01 January 1970 3,035 1 View

What is the simplest method to deoxygenate water?

I am already know that we can use Nitrogen gas to remove oxygen molecules from but how can I know the process completed or not? I appreciated your answers in advance Thank

01 January 1970 4,583 3 View

Is it necessary to deposit thin film on quartz to measure UV- transmission and absorption?

I was measuring UV-spectroscopy Transmission and absorption modes for thin film of graphene oxide on glass. and unfortunately no peaks have seen in results. I guess it's necessary to deposit thin...

01 January 1970 9,943 9 View

Transparent Electrode of graphene oxide on glass results? needs some explanations?

I used the spin coating to make a thin film of graphene oxide on the glass substrate and image it using 100x Microscope and I got this! could anyone help me with this results.Thanks

01 January 1970 3,302 5 View

Any suggestions for potentiostat to work on range 40V up to 150V for electrochemistry depositions

Dears Please advise me any potentiostat device that can work on range 40V up to 150V in order to create porous of Aluminum oxide based on the electrochemistry?

01 January 1970 5,742 4 View

What is optical constants for Graphene oxide thin film?

what are the optimal constants (n, k) for graphene oxide thin film that prepared from a dispersion solution of Graphene oxide power which is prepared by Improved Hummer Method? I've studied the...

01 January 1970 6,140 4 View

How can I tranfer Anodic aluminum oxide (AAO) layer from aluminum sheet in Electrochemistry to transparent Electrode?

I want to transfer Porous Anodic aluminum oxide (AAO) layer from aluminumthat has been carried by Electrochemistry to transperant electrode. with simple chemical approach.

01 January 1970 5,417 1 View