Ayan Sarkar

7 Questions 46 Answers 0 Followers

Questions related from Ayan Sarkar

What is the significance of the negative and positive shifts in the flat band potential?

Dear all, I would like to know about the significance of the negative (cathodic) and positive (anodic) shifts in the flat band potential, in the case of the photoelectrodes. How do these shifts...

08 August 2017 5,533 0 View

Why does sometimes the photo-current in an photo-electrode keep increasing instead of decreasing on illumination?

When an electrode made of semiconductor nanotubes/nanowires etc is illuminated an overshoot or transient maximum in the photocurrent is observed. The photocurrent gradually exponentially decreases...

09 September 2016 5,360 1 View

What's the interpretation of a negative open circuit potential of an electrode in an electrochemical cell?

I'm getting repetitively negative open circuit potentials(OCP) vs. Ag/AgCl reference electrode for some electrodes during the OCP vs. time measurements using an electrochemical workstation. What's...

08 August 2016 788 4 View

What is the typical light intensity of an incandescent 200 W electric bulb in mW/cm2?

What is the typical light intensity coming out of a 200 Watt-220V electric lamp with tungsten filament, while it's operated at 220Volt. Please let me know the intensity in mW/cm2 unit or lux unit.

01 January 2016 9,703 5 View

Why does a current flow in a three electrode conventional electrochemical cell (like in CH Instruments or Auto Lab potentiostat)at 0V vs Ag/AgCl?

A current flow can be observed in the current vs. time (i-t) measurements albeit the applied bias is 0V vs. Ag/AgCl, in a conventional three electrodes system (consisting of the working electrode,...

01 January 2016 7,423 17 View

Can the current be always zero at the flat band potential, obtained from the Mott-Schottky plot?

Does the current always become zero at the flat band potential (Efb ), in the case of a semiconductor-electrolyte system? Do the surface states and impurity states, present in the semiconductor,...

01 January 2016 9,295 4 View

Can anyone please tell me the redox potential Eo,redox of aqueous sodium sulfate and aqueous RhB solution?

I wish to know the redox potential E0redox of the aqueous Na2SO4 and aqueous RhB. What are the redox couples? It'll be very helpful to me if someone tells me about it ( proper reference(s) is(are)...

01 January 2016 6,784 2 View