Wired ghost image- In a TEM image. What might be the cause?

I am wondering what that ghost thick outline, which is around the carbon wire image which I have attached. I did prepare my sample in a different method (sonication-dispersion in Acetone- and...

31 December 2019 800 10 View

No/less features when electrodes tested in two electrode cell rather than 3 electrode cell?

Determination of the Specific Capacitance of Conducting Poly... The above article is a classic paper comparing two and three-electrode measurements for supercapacitors. There are many papers...

09 October 2019 399 1 View

How is charge density of a monolayer oxide calculated?

Hello there, Often in the literature, monolyer charge density is available for metal oxides. For example; Ni(OH)2 monloyer charge desnity is 524 microC/cm2. For Ag, 2.10 C/m2 . But how is this...

07 August 2018 5,513 1 View

How do I account for the contribution to the H evolution to the Qc?

I am calculating the charge on a metal electrode and I am pretty sure there would be some H evolution in the far left end. So do I account this. What is best technique to subtract this charge...

04 May 2018 6,954 1 View

Mass of Oxide layer naturally directly formed on the metal?

Hi there, How do I find the mass of the oxide directly formed on a metal? Eg, say I have copper. I would oxidize it to form copper oxide. How can I calculate the mass of the oxide? JUST THE OXIDE...

03 April 2018 1,419 5 View

What is the typical BET surface area of nickel foam?

Hi there, I have used nickel foam for my various experiments. And the manufacturers usually say porosity

03 April 2018 6,409 3 View

Multiplet splitting in XPS?

The general idea I have is, when we have photo ionised a molecule, vacancy will be created at the core and this vacancy could be filled by the electron in the outer shell (usually transition...

02 March 2018 3,057 7 View

Nickel carbide in carbon fibers/nanotubes after the growth?

Hi there, Commonly known theory for the growth of carbon nano tubes/fibers, is that a metal carbide which is metastable is formed and then this carbide decomposes to form graphene layers and form...

01 February 2018 1,262 1 View

Electrochemical surface area of CNT?

Hi there I want to determine the electrochemical surface area of CNT on a metal substrate. I would be using Randles- Sevcik equation to determine the surface area. But the problem is, which ion...

06 July 2017 4,085 4 View

Thickness of oxide layer using XPS data?

Hey there, I need to find out the thickness of metal oxide layer on a metal using XPS data. How do I do this? Is there any free tool to find this out? And what is the logic used for the...

11 December 2016 1,811 2 View

Polymer composites suddenly solidifies?

I am making polymer composite by solvent mixing method. When I am trying to add filler solution in polymer solution it quickly get solidified. How to make them then uinform? It doesn't give time...

03 March 2021 7,540 4 View

What solvent can I used for Paal Knorr reaction between 6-amino hexanoic acid and 2.5 hexanedione?

I am try to make the Paal Knorr reaction between 2.5 hexnedione and 6-amino hexanoic acid, my problem is type of solvent to use, because 6-hexaminohexanoic acid is soluble in water but I am not...

02 March 2021 4,443 2 View

How to polymerize TEOS?

I want to polymerize TEOS on a surface. I know that NH4OH is a preferred catalyst and an alcoholic solvent should be used .But I can not find certain amounts of each material to use. Does any one...

02 March 2021 1,404 6 View

How can extract ciprofloxacin hydrochloride disolve in water er to organic solvent such as dichloromethan or any other solvent?

I need a procedure to extract the ciprofloxacin hydrochloride from aqueous solution by using dichloromethane in detail,. I thank you very much.

01 March 2021 4,306 1 View

How to separate water from glycerol solvent in a solvent recovery vacuum distillation column?

I am currently doing my third year design project. I have been assigned to design a glycerol recovery column in vinyl acetate monomer production. The process unit before the recovery column is an...

01 March 2021 9,525 4 View

Heat exchanger with liquid Nitrogen as coolant?

I want to cool Natural Gas from 195 Kelvin to 138 Klevin in a heat exchanger by using liquid nitrogen as the coolant medium. When entering the heat exchanger, the liquid nitrogen will have a...

01 March 2021 6,450 5 View

How to make fractions of chloroform extract of plant, using seperating funnel?

28 February 2021 8,466 2 View

Why am i not getting solid after reacting APTES with salicylaldehyde?

The reaction of APTES with salicylaldehyde in ethanol leads to the formation of imine compound yellow solid which is mention in literature, but I am not getting yellow solid I don't know why? when...

28 February 2021 2,955 2 View

can I treat waste water containing solvents and alcohol with electrocoagulation?

there are solvents and alcohol in the waste water of a factory that produces disinfectants. Increasing this waste water requires very serious operations. Can I treat this waste water with...

27 February 2021 2,609 3 View

How to replicate the well conditions of a crystal hit with 20%(w/v) isopropanol?

I had a crystal hit in a well with 0.1M HEPEs pH 7.5, 10%(w/v) PEG 4000, and 20%(w/v) isopropanol. Why is isopropanol in w/v here if it's just solvent? How do I recreate this well condition?

25 February 2021 9,761 1 View