How to reduce self-discharge of supercapacitor? Is there any difference on self-discharge due to electrolyte used?

We are having some issues with self-discharge of supercapacitors. Is that normal, aqueous based device discharge in few hours? Is there any trick to solve that? Is electrolyte dependent the...

05 June 2018 7,225 0 View

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08 September 2014 5,338 4 View

Why is CVD diamond opaque?

I was wondering if you could give me a clue. The band gap of diamond is 5.5eV, which means it should be transparent to all visible radiation. That is not what we have seen from CVD samples. Also,...

08 September 2014 5,292 12 View

What is a realistic value for specific capacitance of carbon materials?

E.g. graphite, graphene, nanotubes, diamonds with mass around 10 mg, two electrode cells, and current around 1A/g in non-aqueous solution (3V). We see so many different values in the literature...

01 February 2014 7,270 6 View

Is that possible measure double layer concentration at electrode/ electrolyte interface with Raman spectroscopy?

As title says is anyone measure double layer concentration at electrode/ electrolyte interface with Raman spectroscopy?

01 January 1970 3,704 1 View

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Is that possible somehow measure Fermi level up or down shifts on material (semiconductor, Graphene, graphite etc) with Raman spectroscopy?

01 January 1970 9,459 5 View

Is There Any Feasible Method To Test Fluorescent Compounds Other Than Fluorescence Spectrometers ??

Is There Any Feasible Method To Test The Efficiency Of Fluorescent Compounds Other Than UV Spectrometers ? Suggestions Would Be Appreciated !

02 March 2021 5,785 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 initial concentration of Pb not the same as calculated one when testing using AAS?

I am currently doing research on the adsorption of heavy metal using magnetic reduce graphene oxide. I use AAS to determine the concentration of the heavy metal. I prepare the Pb solution with...

26 February 2021 9,580 4 View

Is this the write procedure for acid digestion of soil for heavy metal analysis using AAS?

How to do acid digestion of soil sample with 3:1 aquaregia in an open vessel?

23 February 2021 3,053 7 View

Have anyone checked before Cyclic voltammograms of intial ITO substrate and E-teck?

As a beginner in electrochemistry, I tried to obtain cyclic voltamograms of commercial anatase powder deposited on an ITO substrate or on Eteck. After several attempts, I noticed that my cyclic...

23 February 2021 3,175 3 View

Is there an ideal incubation time of RGO-modified SPCE before subsequent use, i.e., electrochemical characterization or further modification?

I notice that upon washing and air-drying of my RGO/SPCE surface and characterizing again via DPV, the current response towards ferricyanide probe significantly decreases. My worry is that the...

22 February 2021 5,324 3 View

Is that possible to do an impedance measurement without FRA module?

One of my colleagues said, "the impedance you can measure with the three electrodes and with the specific sequence varying the frequency" Is it possible to configure the potenciostat without the...

21 February 2021 418 2 View

How can I simulate the optical absorption spectrum of a biomaterial (like DNA or protein) in COMSOL?

I need to simulate the optical properties of a biomaterial, namely DNA, in COMSOL. Basically I need to simulate the IR absorption spectrum of a cylinder filled with a 'concentration' of DNA. I am...

21 February 2021 3,043 3 View

How to Study a proton NMR of Graphene prepared by Electrochemical Exfoliation technique?

I performed a Proton NMR of graphene powder prepared by electrochemical exfoliation technique. It shows some peaks. But I can't understand it.

21 February 2021 8,947 3 View

How to predict the reaction pathway for electro organic synthesis?

Can anyone recommend some any software/models available that can predict substance reactivities and the reaction yield under a specific set of reaction conditions process and proposing pathways to...

17 February 2021 2,383 3 View