Maria Magro

6 Questions 27 Answers 0 Followers

Questions related from Maria Magro

Which is the ideal route to purify graphene oxide prepared by the Hummers' Method?

What do you think or suggest is the best route for purifying graphene oxide that is prepared chemically by the Hummers' method? It is known that this step is tedious, also due to the low pH of the...

05 May 2019 2,192 3 View

Can someone suggest the ideal parameters to carry out XRD on graphite/graphene oxide please?

I have prepared graphite oxide using a Modified Hummers' method (basically I have followed Dimiev et al. approach, see attached). I need to conduct an XRD of the sample in the dry form, and would...

07 July 2018 5,890 3 View

Can I use a Si wafer and spin coat it with graphene or graphene oxide for XPS analysis?

Is it possible to spin coat a Silicon wafer with a suspension of graphene or graphene oxide to carry out XPS, AFM, and SEM characterisations? Are there any protocols that show the ideal rpm value...

07 July 2018 6,444 9 View

Is there a direct chemical synthesis route of graphene from graphite?

Is it possible to chemically prepare graphene directly from graphite and not through the (modified) Hummers' method; i.e. first prepare graphene oxide and then reduced it to possible graphene and...

05 May 2018 7,325 2 View

Best substrate for XPS characterisation of graphene and graphene oxide?

What is the best substrate for the XPS characterisation of graphene and graphene oxide? I will be using mostly the Al Ka radiation (hm = 1486.6 eV) to irradiate the samples, however not limited...

05 May 2018 3,893 4 View

What master samples or standards are used to calibrate XPS for both graphene and graphene oxide please?

I am new to using the XPS technique, but will be doing analysis of graphene and graphene oxide. Anyone knows or has any literature on how the calibration is carried out? Also, what master...

12 December 2017 9,049 11 View