Stefan Ručman

11 Questions 89 Answers 0 Followers

Questions related from Stefan Ručman

Why my electrochemical impedance spectroscopy results look like this?

Please see in the attachement, I prepared iron thin films on ITO substrate and I measured resistance, however the graph dont start from same point, why would something like that happend?

14 November 2022 6,231 6 View

Why my gold nanoparticles look like this on SEM?

I synthesized gold nanoparticle thin films under four conditions, three of them show agglomerated islands, like any metallic particle observed before, highly agglomerated. However this fourth...

14 October 2022 4,749 9 View

Is Dynamic light scattering (DLS) suitable technique for nanobubble characterization?

I would like to know from DLS experts if they ever used DLS to quantify nanobubble distribution in solution? and if its possible to use it while producing it in situ?

30 December 2020 8,482 21 View

Optical direct band gap change with substrate, why?

I deposited Zinc thin films on two types of substrate materials, one is ITO and second quartz substrate. When I calculated optical direct band gap there is difference in energy for 0.2-0.4 eV...

05 April 2019 5,745 7 View

Is there a cheaper way (not expensive) to determinate band gap of transition metal thin films?

I prepared zerovalent iron thin films, and also sulfated and nitride version of it. Lower band gap facilities electron transfer which is beneficial to environmental remediation, but experiment...

18 December 2017 893 3 View

How to improve spatial resolution in Computed tomography?

Hello, I wanted to know what is wrong with my CT (CAT scan) image. when I do medical imaging everything look normal and clear but after Multi Planar Reformation picture in sagittal and coronal...

08 October 2017 9,643 4 View

Why wustite ( FeO) and nitride (FeN) have same picks in GI XRD?

Iron nitrides thin films were synthesised, and grazing incidence XRD was applied to characterise crystalline state, Picks confirms structure of FeN, but afterwards I used raman to confirm it is...

27 September 2016 2,617 46 View

What are differences between X-ray Photoelectron Spectroscopy (XPS) and Auger Electron Spectroscopy (AES) in terms of application and reliability?

I am confused with lectures on XPS and AES by Richard Haasch and in general, I have a feeling that these two spectroscopic methods are basically same, a simular principle of technique. Something...

04 April 2016 3,430 7 View

Why are red small ants attracted to ferrous solutions or iron ions solutions or magnetic nanoparticles?

I was preparing magnetic nanoparticles in lab (SPIONS), after measuring of OD I left the cuvettes to dry on the table, and suddenly in cuvette that was iron-oxide solution ( I can't call it MNP...

31 October 2015 4,996 17 View

Why I have so much problems to extract pNZ8149 from L.Lactis?

Dear, I literally checked everything twice, and I still dont know why I am not obtaining enough amount of plasmid. Did any of you experienced trouble with L.Lactis? I thought this would be easy...

12 June 2015 10,009 1 View

What is best E.coli strain for plasmid transformation?

Could anybody suggest me what is appropriate host strain for pNZ vector? I am using plasmid from L. Lactis and now I need to find out appropriate complement cell. Best regards,

21 February 2015 727 6 View