Ayesha Saleem

13 Questions 17 Answers 0 Followers

Questions related from Ayesha Saleem

Is ytterbium oxide fluorescent? what is its excitation/emission wavelength?

I want to know the excitation/emission wavelength of ytterbium oxide?

02 February 2019 973 1 View

When graphene oxide is doped with Nitrogen, which atom will be replaced by Nitrogen: Carbon or Oxygen?

In N doped graphene Carbon is replaced by N in the graphitic structure. If it is same in case of N doped Graphene oxide then why oxygen containing functional groups are reduced as indicated by...

08 August 2018 766 3 View

Does exfoliated graphite oxide mean graphene oxide?

if we exfoliate graphite oxide by sonication then is the resultant graphene oxide.

06 June 2018 9,746 4 View

Does excitation wavelength of Rhodamine B dye depend on concentration of dye in solution?

I found excitation wavelength to be at 256 nm at a concentration of 0.5 mg/ml and 554 nm at a concentration of 0.0001 mg/ml.

06 June 2018 8,431 7 View

Do TMB and Graphene oxide give any colour together?

I added TMB to GO particles before adding hydrogen peroxide for testing peroxidase like activity, it gives colour even in the absence of hydrogen peroxide.Do TMB and GO have any kind of chemical...

04 April 2018 9,707 4 View

I have preapared a solution of TMB Hydrogen peroxide and Graphene oxide it is not showing any colour.Why?

The literature reveals that this solution should have blue colour as H2O2 oxidizes TMB. I dont know what went wrong why there is no colour? what can be the possible reasons?

03 March 2018 9,575 1 View

I prepared graphene oxide and dried it but later when I used it got moist immediately.i dried it again but later when used it was moist again. why ?

I have prepared GO before but it was dry each time I used it, but this time it is getting moist again and again. whats wrong?

03 March 2018 7,532 3 View

What is the bulk energy of graphene oxide?

I want to find the radius of graphene oxide that i have prepared, for that i need to know the bulk energy.

01 January 2018 9,140 4 View

If as prepared graphene oxide is excited at shorter wavelength in Raman spectroscopy, what can we infer about its energy states and hence its purity?

I prepared graphene oxide and it showed results at short wavelength of 457 nm but other students got results at 514 nm. so i want to know about the enrgy states and quality of my sample?

11 November 2017 1,545 6 View

What are the values of Raman peaks of graphene and graphene oxide?

how can i differentiate the Raman peaks of graphene and graphene oxide? they appear to be at almost same wavenumber?

11 November 2017 8,057 3 View

Can zinc sulfide be used for doping sulfur into graphene oxide?

People have used sodium sulfide for doping sulfur in graphene oxide but if Na2S is not available can we use zinc sulfide in place? or which chemical should be used instead?

11 November 2017 6,544 4 View

What is the difference between graphene quantum dots, graphene oxide quantum dots and reduced graphene oxide quantum dots?

is there any difference in the functionalities and properties of these three?

10 October 2017 5,152 6 View

On adding melamine to resorcinol, what does red shift in uv spectra indicate?

I have added melamine powder to resorcinol+pbs solution, and i have observed a peak shift towards red for the combination. I am not getting an answer to the change that has taken place?

09 September 2017 1,482 3 View