Alex Gupta

6 Questions 6 Answers 0 Followers

Questions related from Alex Gupta

How can the Compression Stress on a membrane electrode assembly be calculated from the torque on the bolts of a proton exchange membrane fuel cell?

I'm trying to calculate the compression stress on the fuel cell components so that I can determine the porosity of the diffusion media as in the following paper: R. W. Atkinson, Y. Garsany, B. D....

12 November 2020 2,492 3 View

How to Quantify the Surface Concentration of Features on Particles in ImageJ?

I have AFM images of the topography of a sample which contains particles and tunneling AFM images of the current map over the particle surfaces. I have segmented the particle image (image showing...

16 September 2020 3,707 3 View

What energy value do I use to determine the mass attenuation coefficient for an element?

I would like to calculate the infinite thickness of a tungsten-containing sample for an x-ray fluorescence experiment. To calculate the infinite thickness, a mass attenuation coefficient is...

28 July 2020 6,221 1 View

How can the surface of a fluorine-doped tin oxide film be hydroxylated?

We are working with glass pieces coated with a FTO film, as purchased from a supplier. We would like to covalently attach silane groups to the surface via reflux. First, we need to figure out how...

18 October 2019 8,717 2 View

How can solution resistance be determined?

We are trying to determine the conductivity of organic solutions (acetonitrile solvent). EIS gives negative solution resistance for these species. We are using a conductivity cell with two...

01 October 2019 3,351 3 View

How can I determine the grain size distribution of a perovskite film from SEM images?

I have an SEM image of a perovskite film (see attached). I want to determine the grain size distribution (histogram of grain size on x-axis vs. counts on y-axis). I am currently using ImageJ, but...

13 August 2019 1,177 17 View