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

How would you ionized Calcium carbonate without using aqueous solution?

most non aqueous inorganic solvent are poisionos, or they contain protons. What do you think is the appropriate method for CaCO3 disolution without using solvent? some crystals are pyroelectric,...

02 March 2018 1,209 0 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

flexibility of polymers chain

effect of double bond on the flexibility of polymers

07 April 2021 0 0 View

Formulation of polymer color flakes

I am writing to request some information for making polymer color flakes. I would appreciate the help.

17 March 2021 0 0 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 techniques can I use to determine the miscibility of polymer blends?

The term miscibility refers to the single-phase state in thermodynamics. I do not mean the compatibility of different components. To determine the miscibility I know several techniques such as...

03 March 2021 4,107 4 View

Adherance of Polyaniline coating over stainless steel?

Is the electropolymerisation of polyaniline coating over stainless steel (SS) via Cyclic voltammetry technique is really adherant? Else how to improve the adhesion of the coating, whether any...

01 March 2021 8,220 2 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

Can polymer concentrations be calculated based on the number average molecular weight?

Hello, I spin-cast two different polymers onto wafers and measure their height as a function of initial concentration. For polymer A, I have the weight-average molecular weight (Mw) as well as...

28 February 2021 7,882 2 View

What is the density for pva electrospining?

I'm Juan Carlos, a high school student who is working with electropinning, I made an electropinning machine with a 21g needle and a 30kv high voltage source and the distance between my needle is...

28 February 2021 298 3 View

1 nm thick MgO thin-film to be deposited on Si wafer using thermal evaporation. What will be the optimum deposition conditions?

Favourable conditions of base pressure, rate of deposition. Also, by which characterisation technique to be used to verify the thickness of the deposited film.

28 February 2021 3,640 3 View

LEDs on Vis Light photo degradation of MB water sol via N doped TiO2 in a mini flume?

Good day to all, I have no experience with light emitting diodes. I am building a glass mini flume to demonstrate the photo degradation of Methylene Blue in water running over self cleaning...

26 February 2021 4,026 5 View