Optical direct band gap change with substrate, why?

I deposited Zinc thin films on two types of substrate materials, one is ITO and second quartz substrate. When I calculated optical direct band gap there is difference in energy for 0.2-0.4 eV...

03 April 2019 2,467 8 View

How would you extract lipids without using solvents?

I prepared cell culture with phospolipid of interest. However, in extracting it I shouldnt use any kind of solvent. What techniques would you use that dont have liquid phase for extraction of...

04 May 2018 2,895 6 View

Why Rolling Circle Amplification is not used more in molecular biology?

We didnt even mention it at my BSc and Msc study in molecular biology, I only heard of it in context of sensor material, dna origami and nano DNA senors. Is this technique new? or it was under...

02 March 2018 7,760 2 View

I have a problem obataing GIXRD results of Alluminium thin film. Why?

I used incidence angle of 1 degree. Aluminium and Aluminium Nitride via sputtering method. I didnt annealed substrates, Which I havent done also with Nickel and Copper thin film, but they showed...

01 February 2018 7,569 3 View

Can you suggest reliable in-situ technique for absorption kinetic of pollutant (heavy metals) to nanoparticles?

I would like to know if there is easy, cheap and straightforward way to determined removal rate of pollutants by nanoparticles? I prepared several types of nanoparticles, (bare, polymer coated,...

31 December 2017 3,779 3 View

How to improve spatial resolution in Computed tomography?

Hello, I wanted to know what is wrong with my CT (CAT scan) image. when I do medical imaging everything look normal and clear but after Multi Planar Reformation picture in sagittal and coronal...

09 October 2017 4,520 5 View

Why different stregnt of magnetic field in magnetron sputtering yield to different results, nitridification rate?

05 June 2017 7,175 3 View

Why wustite ( FeO) and nitride (FeN) have same picks in GI XRD?

Iron nitrides thin films were synthesised, and grazing incidence XRD was applied to characterise crystalline state, Picks confirms structure of FeN, but afterwards I used raman to confirm it is...

08 September 2016 3,261 47 View

Why is sorption enhanced in presence of magnetic field?

06 July 2016 4,359 8 View

Is it possible to coat nanoparticles with environmentally friendly "green" method that is also cheap?

Have anybody tried some method in which surfactants, or polymer and any other molecule intended to cover surface of nanoparticles in environmentally friendly and economically acceptable way. Ultra...

02 March 2016 4,387 14 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 is the production process of CaFe ferroalloys?

I looking for ferro calcium production process

03 March 2021 1,755 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

Why Austenite grains in steel show much more twinning than ferrite grains?

It is oftentimes said to be a distinctive metallographic trait that differentiates a fully austenitic and a fully felly ferritic steel without etching that might distinguish between two. Why...

02 March 2021 728 2 View

How Relativistic effects is one reason for lanthanide contraction?

The Lanthanide contraction which is the decrease in ionic radii of the elements in the lanthanide series from atomic number 57, lanthanum, to 71, lutetium, is due to poor shielding of the 4f...

01 March 2021 2,272 4 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

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