Rekha Singh

9 Questions 21 Answers 0 Followers

Questions related from Rekha Singh

How grazing angle XRD can give information regarding in-homogeneous crystallinity in polymer thin films?

I have semicrystalline polymer thin films (~100 nm) deposited on ITO substrate. We expect difference in their crystallinity as we go far from the substrate surface which arose due to difference in...

06 June 2015 1,445 8 View

Is the conductivity value obtained by in-situ measurements (electrochemical) should be similar to the one measured by four point measurements?

If a doped polymer has conductivity of 0.1 S/cm obtained by four point measurements (electrically), will the conductivity of this polymer obtained by in-situ electrochemical measurements be close by?

12 December 2014 4,268 6 View

Can anyone help with the observed hysteresis in in-situ conductance measurements?

During in-situ conductance measurements, the gate potential was varied from -0.8 V to 0.6 V (anodic cycle) and reverse measurements from 0.6 V to -0.8 V (cathodic cycle). I have observed a huge...

12 December 2014 3,469 3 View

Can somebody help with In-situ conductance measurements of chemically synthesized conducting polymers such as PEDOT-PSS?

I am using gold interdigitated electrodes with 5 um width and spacing. I spin coat PEDOT-PSS on the IDE to get around 100 nm thick films. In-situ conductance measurements are done by dipping the...

11 November 2014 7,564 5 View

Is it reliable to compare absorption spectra of polymer film recorded in transmission mode and reflectance mode?

How much more reliable is the comparison of transmission data and reflectance data for a thin film of polymer coated on ITO/glass and Platinum respectively?

10 October 2014 2,588 8 View

Can anyone help in color measurements of electrochromic polymers using Ocean optics spectrometer?

I am using Ocean optics spectrometer having USB2000+ detector with LS-1 tungsten-Halogen lamp. While doing color measurements, we have to choose observer (2-degree/10-degree) and illuminant (D50,...

09 September 2014 7,959 4 View

How to co-polymerize two monomers electrochemically having large difference in oxidation potential?

I want to co-polymerize a monomer electrochemically whose onset oxidation is 0.3V with the other monomer having 0.8V (vs Ag/Ag+). Since they have different reactivities, the proportion of two wont...

08 August 2014 8,030 2 View

Is there any effect of electrode resistance/conductivity on coloration efficiency of electrochromic polymer film deposited on it?

I am observing that more charge is required for doping/dedoping PEDOT films deposited on metal electrodes compared to that on ITO. Due to this the coloration efficiency is very low on the metal...

06 June 2014 5,207 3 View

Can anyone help with Cyclic voltammetry of PEDOT-PSS films?

I have spin coated PEDOT-PSS films on ITO. When I do cyclic voltammetry of these films, they show a huge change in CV after every cycle especially change in the reduction peak current (decreases)...

12 December 2013 5,073 7 View