About XPS; what will happen to the background of XPS?

More Chinedu Onyeke's questions See All

If you have experience with implementation of Meshless Methods with Radial Basis Functions, can you please send me an email?

I am using radial basis functions for a current problem, but these basis functions do not satisfy the kronecker-delta condition like the finite element basis functions. I would like to have a...

19 March 2024 7,594 0 View

What is the connection between sizre of supercells, k points, cut off energy and convergence?

does increasing or decreasing size of supercells affect these in DFT calculation?

17 March 2024 7,374 3 View

A project in supercapacitors?

which carbonaceous material will be good to study the performance of carbon materials in supercapacitors?

17 March 2024 5,365 2 View

Please how do i describe the SEM images of these Porous carbon?

Are there specific things i must mention when describing these images/

03 January 2024 7,759 5 View

Pleass what's the effect of changing salt template ratio in preparing porous carbon?

I had a laboratory course about synthesis of porous carbon but the salt template ratio was changed from 1:1 to 1:10. Why?

02 January 2024 5,914 0 View

How can one differentiate between direct carbonized carbon and salt template method?

Hello, i prepared porous carbon using direct and salt template method. i thought the salt template should only give mesoporous carbon but i got hysteresis in the two methods. How do i explain that...

31 December 2023 6,474 4 View

What type of spectroscopic transitions is observed in NMR?

What are the typical excitation frequency

20 December 2023 7,922 2 View

Please why is the NMR considered a very low sensitive method when compared to other methods?

I heard it has to do with the population ratio, energy difference and Boltzmann factor.

19 December 2023 6,094 3 View

How do i explain SEM images of porous cxarbon?

How can i know if it microporous, mesoporous or macroporous or moixture by mere looking is there a way to analyse before further using physisorption?

10 December 2023 700 2 View

How do i Interpret the result olf TEM and SEM of csrbonaceous materials?

I want to know how i can use SEM and TEM micrographs to discuss mesoporous and microporous nature of materials

28 November 2023 378 1 View

In the presence of VERY high concentration (1000 ppm) of silicon, the adsorption isotherms of arsenic are showing anomalous trends, why so?

I conducted an adsorption experiment of arsenic on soil in the presence of different doses of silicon as competing ions to see the effect of silicon on arsenic adsorption and desorption. I took 5...

03 August 2024 6,500 3 View

Is artifacts in XPS possible to build high deviation in binding energy larger than 5 eV??

Hello. Thanks for your consideration to see my question. Recently, I conducted XPS anaylsis of g-CN that is prepared from thermal polycondensation of DCDA, so-called conventional bulk-g-CN,...

30 July 2024 9,824 2 View

How can I calculate wt% of material from the area obtained from XPS data?

I have calculated the peak area from the XPS data. From this data how can I calculate the wt% of the material.

14 July 2024 6,951 1 View

How to solve this error while I simulate gidl using tcad ?

There is an error message "interface silicon/oxide not found in grid xxx.tdr file"

26 June 2024 5,551 0 View

How to cut a sample with several micrometers thick silicon oxide with DISCO DAD323 dicing machine?

I use a DISCO DAD323 dicing machine to cut my sample,which has 1-2 micrometers SIO2 on its top.However,the SIO2 is broken and fall apart everytime.I tried different cutting speed but didn't work....

20 June 2024 1,131 0 View

Can i deduce the presence of surface states based on my XPS data?

In my XPS spectral, i detected oxygen group bonded to carbon and in my zinc spectral (note : my sample is ZnO) ...there are two valent zinc species available, (which is unsual as my previous...

17 June 2024 3,888 2 View

How to carry out Raman on a CVD prepared material?

I have a CVD-prepared material. The problem is that the LASER covers a smaller area than the islands, so I see localized effects. Sometimes, the intensity of the silicon peak is larger than the...

05 June 2024 6,797 3 View

XPSpeak41 after optimizing the graph is still not well fit?

Hi, i am currentyl fitting mno2 material into the peak at Mn 2p 3/2 and Mn 2p 1/2. in the right side of the peak, the tip highlighted in red is still not fit enough. is there any idea how to fit...

05 June 2024 7,957 6 View

Why there is disrepancy in different Manganese oxidations states peak positions?

Hi, Thank you in advance for answering my questions. I am working with a manganese dioxides material with different phase structures (α-MnO2, β-MnO2, and δ-MnO2). I am actually a bit confused...

05 June 2024 9,726 4 View

Uncertainty estimation (standard deviation) of XPS peaks in CasaXPS?

I'm looking for a way to measure the uncertainty (standard deviation) on the quantification (area) of the components of an XPS spectrum using CasaXPS. I found these options in the software, but...

04 June 2024 902 2 View

Jürgen Weippert

The escape path for electrons is limited to a few nanometers, so in the deeper layers atoms will also get ionized temporarily, but the electrons will be recaptured by the solid.

Chinedu Onyeke

Thank you sir but between the gold and silicon of the same size so which one will it be gold then ?

I don't know what you mean by that. XPS differentiates elements by binding/kinetic energies, so if you see both, they will be clearly differentiable.