Can we quantitatively identify level of ordering in a solid amorphous phase to explain its ionic conductivity with temperature?

05 June 2016 8,382 6 View

Can we quantitatively estimate the volume fraction of crystalline phase (SrSiO3) and glassy phase (Na2Si2O5) by Raman analysis in synthesized sample?

We have synthesized Na doped SrSiO3 using solid state reaction method. Since XRD indicate only crystalline phase and there is possibility of glassy phase (Na2Si2O5) formation along with...

31 December 2014 3,994 5 View

How can I evaluate a Raman mode (386cm-1) for LaInO3 at 386cm-1 is symmetric or antisymmetric stretching vibration?

I have synthesized Ca-doped LaInO3 system. From the Raman analysis, I found the highest intensity peak at 386cm-1 which is due to In-O-In streching mode. How can I know that it is a symmetric or...

11 December 2014 9,467 14 View

How much R-value is acceptable for Rietveld refinement in a polycrystalline solid?

I have synthesized a polycrystalline solid using a solid state reaction method and refined the XRD data using FULLPROOF software.

05 June 2014 7,563 4 View

In XRD, why does the sharpness of (200) and (020) planes in LaGaO3 suddenly diminish with Ca doping?

CaO is doped at La site in LaGaO3 using solid state reaction method. During powder XRD analysis, the undoped sample (LaGaO3) was matched with ICDD card 01-089-7833 and it consist of sharp peaks...

04 May 2014 3,421 8 View

Why is there a difference between the initial value of conductivity in DC measurement and conductivity value during AC measurement?

I am trying to measure DC and AC conductivity of Ca doped LaInO3 samples and wish to separate the electronic from the ionic contribution. I assume that initial value of conductivity in DC...

04 May 2014 5,141 4 View

Does gold sputtering in electrolyte samples (disc-shaped) interfere during AC conductivity measurements?

I used gold sputtering (to make electrode contacts) in Ca doped LaInO3 samples for AC conductivity measurement from room temperature to 800C. Does it interfere with the conductivity response of my...

04 May 2014 2,300 2 View

Why does a Perovskite structure appear on the 180 cm band of Ca doped LaInO3 in raman spectra?

This structure was synthesised by the solid state reaction method.

03 April 2014 6,343 2 View

Why is red shift in raman bands from 180-300cm-1 obtained when Ca is doped in LaInO3 perovskite?

Ca doped LaInO3 samples were synthesized using solid state reaction method. 5mol%Ca shows maximum red shift(3cm-1) for 180cm-1 band. With further doping, lesser red shift is obtained. Also, The...

03 April 2014 9,256 3 View

How does one theoretically calculate the amount of dopant for single phase in perovskites?

I wish to theoretically calculate the amount of dopant that can maintain the solid solubility of perovskite system. AS single phase is necessary for solid electrolyte applications.

31 December 2013 8,005 1 View

Can we classify HV and LV lines based on line length?

I have dataset which shows the length of power lines. I need to classify the lines based on the line length. Is there a rule to classify the High voltage (HV) and low voltage (LV) lines based on...

03 March 2021 4,116 4 View

Sutter electrode holder leaking after applying positive pressure. How to fix?

I am using a Sutter electrode holder for my patch clamp experiments, but I'm having trouble keeping positive pressure inside my electrode due to a leak out of the back of the holder. I have added...

02 March 2021 5,829 1 View

What are anisotropic electrical and optical properties of a semiconductor due to?

In some materials, properties such as band gap, thermal conductivity differ along different crystallographic axes. What are the basics?

01 March 2021 1,923 3 View

What thickness need for ITO to use as conductive layer?

I want to do RF sputtering of ITO on glass substrate using magnetron sputtering. what thickness do i need to make it good conductive layer to use it for PSC. Moreover, whats about thickness of...

01 March 2021 395 3 View

What is the state of the drug inside solid lipid nanoparticles (SLNs)?

I am a little confuse with the mechanism of solid lipid nanoparticles (SLNs). The main point of encapsulating drugs into SLNs is because some drugs have low solubility in water. Therefore, SLNs...

01 March 2021 3,703 3 View

What is the indication of the absence of peaks in Methanol electrooxidation CV curves ?

I have several question regarding the MOR; hope anyone help me better understand. 1- in CV using (KOH+MEOH) what is the indication of absence of the redox peaks? shouldn't they exist as a sign...

28 February 2021 4,851 8 View

Why is my platinum counter electrode getting dirty during electrodeposition?

I am conducting anodic electrodeposition of MnO2 onto a stainless steel substrate, using a platinum strip as a counter electrode. This is done galvanostatically, with the current held between 5...

27 February 2021 1,829 3 View

Can impedance of antenna be less than 50 ohms?

I am simulating helix antenna in hfss, right now, giving excitation with 50 ohms port. When I see the results of Z parameter (real). It shows lower than 50 ohms. Do not understand, if it can be...

27 February 2021 4,218 7 View

Should we reduce the standard unit of length to 0.31951540592 meter ?

The reasoning behind this question is to align the ratios of the proton potential in energy per charge to the speed of light in distance per time. As these two dimensions appear to be related,...

27 February 2021 947 7 View

What could be reason for getting such type of graph for complex impedance in case of polymer blend films?

Its effect appears in real part of ac conductivity also. Can anyone suggest any reason behind it?

26 February 2021 3,487 3 View