Why did PCBM crystals migrated at the surface of P3HT:PCBM films?

I have solvent annealed P3HT:PCBM thin films by THF. I observed that PCBM formed highly ordered crystals by GIWAXS. AFM shows stacked sheet like organization of the film. XPS shows that PCBM is...

10 November 2018 7,973 1 View

What is the best correlation between glass transition and melting temperature?

Hello Thank you very much for your attention. I see that there are some correlations between glass transition temperature and melting temperature. I got some old articles (RATIO OF THE GLASS...

06 July 2016 6,569 9 View

Can Raman laser carbonize some polymer?

Hello Thank you for your attention. I am using 532 nm laser and getting carbon Raman signal. I am wondering whether those are real signal or the polymer itself degrading to carbon. I am not...

04 May 2016 4,395 2 View

What is the difference if I campare area vs. intensity in Raman?

02 March 2016 3,659 4 View

What is the depth resolution of Energy Dispersive Spectroscopy?

We are planning to conduct Energy Dispersive Spectroscopy (EDS) on regular polymers (like, polycarbonate, polystyrene, etc.). What is the depth resolution of EDS?

11 December 2015 4,425 11 View

Migration of PCBM at the top surface of P3HT:PCBM films

I have solvent annealed P3HT:PCBM thin films by THF. I observed that PCBM formed highly ordered crystals by GIWAXS. AFM shows stacked sheet like organization of the film. XPS shows that PCBM is...

01 January 1970 7,851 1 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

How two melting peaks in DSC of polypropylene can be merged into one crystallization peak?

The figure shows DSC cooling (blue) and 2nd heating (green) curves (step: 10 K/min) for a commercial sample supplied as Atactic Polypropylene (APP). The heating curve illustrates two major...

03 March 2021 5,857 3 View

I need to image mesoporous silica nanoparticles that are in ~100 nm size and do high resolution TEM to look at mesopores. what grids should I use?

Need to image mesoporous silica nanoparticles using the TEM. Also, need high resolution TEM images to see the mesoporous structure. Kindly suggest what kind of grids to use. Thanks, Shatadru

02 March 2021 1,787 2 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

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

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 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

Shall I skip the measurement model in SmartPLS?

Hello everyone, I had run a mediation model in SmartPLS using questionnaires that were already validated among my statistical population. A professor who edited my paper -though she is not...

01 March 2021 3,052 3 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

In Molecular Dynamics Simulation, how do I make changes to the force field according to my protein?

Hi In Molecular Dynamics Simulation, how do I make changes to the force field according to my protein? I got this error in the add-ion stage: Fatal error "./ amber99sb-ildn-HHH.ff / force...

01 March 2021 8,747 4 View