I am working on graphene oxide and reduced graphene. How do I determine the bandgap, HOMO, LUMO and binding energy?

More Alfred Obar's questions See All

What parameters should I take to continue my research on MPI in state of Rajasthan?

I am a student pursuing MSc in Economics and Analytics. I am doing a research on MPI on the state of Rajasthan. I am new to this field so I have little knowledge. Currently I am doing Literature...

27 April 2024 7,034 1 View

Why is PyRx changing my ligand element after molecular docking ?

I was using PyRx Vina Wizard to perform ligand-protein interaction molecular docking. However, after loading the results into DSV, I noticed that the elements had changed following the molecular...

19 March 2024 5,201 0 View

Does AI hold the key to improving supply chain management of vaccine distribution?

Vaccine distribution is heavily executed with good supply chain management. AI holds the promise to improve management?

05 January 2024 9,500 2 View

AI-augmented healthcare: are there ethical and privacy issues??

Artificial intelligence augmented governance of healthcare and ethical issues need attention to ensure data protection

05 January 2024 4,757 2 View

Medical law inclusion in the training of health professionals necessary??

Medical Negligence has been on the rise in several countries. Is it necessary to include Medical law education in the training of health professionals?

05 January 2024 6,177 6 View

The huge 7.6 magnitude earthquake in Japan: are there some anticipated Public Health challenges?

Devastating earthquakes of huge magnitude comes with it Public health challenges.

02 January 2024 5,115 4 View

Burnouts are life-threatening phenomenon. What are the actual causes of this phenomenon?

Dealing with Burnouts among Health Tutors : what are the remedial measures?

02 January 2024 2,717 0 View

The Israel-Hamas war : how do we deal with issues of Public heath - access to potable water, healthcare as well as mental health for women & children?

War generally brings untold hardships for society's most vulnerable- women and children. Hardship for women and children anywhere is hardship everywhere.

25 November 2023 7,487 7 View

How to detect predatory journals?

How do you know that a journal is a predatory journal: is it due to unsolicited emails requesting for manuscripts or the speed at which the manuscripts are published or what?

14 November 2023 7,684 3 View

Please, how do I get polyisobutylene butyl rubber or polyisobutylene, or butyl rubber and then polyurethane?

The polymer is for the encapsulation of perovskite solar cells. I will appreciate it if I can get some researchers that will tell me anywhere I can get the polymers, and help to also specify the...

16 August 2023 1,286 1 View

How to develop investments in renewable energy sources?

08 August 2024 5,112 3 View

Why results of ROS flurescence are negative as there was no bacteria within?

Hello. I am working on ROS production of two systems: system A is cerium oxide and hydrogen peroxide, system B is cerium oxide nanoparticle, hydrogen peroxide and potassium bromide. I did some...

04 August 2024 5,974 3 View

Binder for ZnO nanoparticles in graphite paste electrode?

I have been using paraffin, but the deposited ZnO still detach from electrode. What is the best binder to modify graphite paste electrode with ZnO nanoparticles?

03 August 2024 4,624 3 View

Why aren't most metal oxides insoluble in water?

Why BaO (s) + H2O(l) ---> Ba 2+(aq) + 2 OH - (aq) if Oxygen loves owning all the electrons, why would it bind to hydrogen which competes with Oxygen for electron ownership more so than...

03 August 2024 5,392 1 View

Why chloride turns into chlorine gas in a Downs cell?

I imagine the battery drives the graphite into a carbocation, then chloride is oxidized to donate the electron to the carbocation, but what pushes the lost electrons of chloride to be shared...

03 August 2024 5,384 0 View

How to calculate the molar proportions of the oxides from the XRF analyses?

02 August 2024 2,565 2 View

Short Synthesis of Graphene Oxide from Natural Graphite Flakes?

I am in search of a modified Hummer's method, which can be used to synthesis graphene oxide within 6-8 hours. As I am a student it is not allowed for us to work after 5 in the laboratory. So I am...

01 August 2024 8,368 2 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 separate graphene from amorphous carbon of similar particle sizes?

The starting material is a finely ground powder. Some particles contain more graphene than others.

30 July 2024 3,978 2 View

What is the solubility of Iron (+3) in Bismuth Oxide?

Dear all: I am modifying Bismuth Tungstate with Hematite (Fe2O3), so I would like to know about how much Iron(+3) can form a solid solution in a Bismuth Oxide matrix. Best wishes Marco

29 July 2024 2,163 1 View

Ahmed Shawky

Hello Dr. Alfred, it is better to measure XPS, cycluc voltammogram...and UV-Vis-NIR spectra...please refer to related references

Jürgen Weippert

Optical bandgap: UV-Vis or ellipsometry

Electronic bandgap: STS (Scanning tunneling spectroscopy)

HOMO binding energies: UPS or EELS

LUMO energies: IPE (Inverse photoemission)

Ammar Qasem

This paper is useful to understand this subject.

The precise role of UV exposure time in controlling the orbital transition energies, optical and electrical parameters of thermally vacuum evaporated Se 50 Te 50 thin film