Sunil Sahi

19 Questions 22 Answers 0 Followers

Questions related from Sunil Sahi

Is it possible to see upconversion emission using sunlight as an excitation source?

Is there any upconverting nanoparticles with high quantum efficiency (preferable emission in red), which can be excited using sunlight ( NIR band).

03 March 2018 1,566 4 View

Is it possible to do heat initiated free radical polymerization of N N dimethylacrylamide?

I want to make transparent polymer sample of N N dimethylacrylamide. But I don't know if it can be polymerized using AIBN or some other initiator under heat.

11 November 2017 8,868 4 View

What is the best way to approach a professor for a post doc position?

Is it a good practice to attach CV , if not certain about the availability. Is it absolutely necessary to attach a cover letter with CV or only CV is fine. What does no response to emails means?

03 March 2016 3,229 2 View

Why only XRD peaks at higher angle are blue shifted upon doping?

I have doped Y2O3 with La3+ ions and XRD shows slight blue shifting of higher angle peaks but major peak at lower angle remains at same position.

12 December 2015 4,806 10 View

How to get rid of the bubble formation due to organic additive during the bulk polymerization of styrene?

I am making styrene disk through bulk polymerization with some organic added to the monomer. I am polymerizing the monomer in a closed container at 80 C but getting some bubble which is affecting...

11 November 2014 6,731 11 View

What is the color of LaSrMnO3(LSMO) particles

I have tried to made some LSMO particles ang got black color particles when sintered the gel at 500C. Does anyone have any idea if the color is right?

08 August 2014 413 9 View

How can I make highly ethanol dispersible LaF3 nanoparticles?

I have used PEG and nanoparticles are dispersible in ethanol at low concentration but at higher concentration it loses its dispersibility.

04 April 2014 7,301 0 View

Does anyone know a water miscible monomer that can be polymerized by bulk polymerization?

Any kind of monomer that can still be polymerized in the presence of very small quantity of water is good.

03 March 2014 6,511 3 View

Is your nc-glass composite a powder or it is nc into a Sio2 matrix (gel)?

If it is like gel or solid matrix into which nc are embedded, how is the transparency of the matrix?

02 February 2014 1,667 0 View

Can anyone suggest a way to synthesize highly water soluble zinc oxide(ZnO) nanoparticles?

When I tried to synthesize, the particles don't turn out to be soluble in water.

01 January 2014 761 3 View

Can anybody suggest how to make films of Poly Vinyl alcohol?

I don't have access to solvent casting technique, so I wanted to make those films w/o solvent casting device. I have tried to dissolved PVA in water and tried to dried it into a glass but It is...

12 December 2013 8,523 11 View

How do you load the nanoparticles into a polymer matrix keeping the matrix transparent?

My goal is to load up to 20-30% of nanoparticles while maintaining the transparency. These nanoparticles are made using solid state reaction at 1000C.

10 October 2013 4,512 8 View

Does anyone know an easy method to modify the Y2O3 np surface to make it soluble or dispersible in nonpolar solvent?

These np are made by solid state reaction heating at 1100 degree C.

09 September 2013 8,609 1 View

How does the color of oleylamine coated nanoparticles looks when dispersing it into toluene?

I have made some rare earth fluoride nanoparticles coated with oleylamine and then disperse it into toluene. The solution color turns to brownish and I wasn't expecting this. I try to make it...

07 July 2013 7,189 3 View

Does anyone know how to get rid of pyrolysis of oleic acid or octadence?

I am trying to decompose rare earth acetate in oleic acid/octadence/oleyamine. Previous publications suggest that the end product is a white precipitation, but I keep getting a black gel like...

05 May 2013 2,944 5 View

Can anyone suggest a hydrophobic surfactant that does not quench x-ray luminescence?

I am looking for surfactant that is soluble in toluene.

02 February 2013 4,029 0 View

Can anyone suggest a surfactant which can be dispersed in poly vinyl toluene monomer?

I want to make nanoparticle / pvt nanocomposite.

01 January 2013 5,249 4 View

How can I make nanocomposites of water soluble nanoparticles and PMMA polymers?

At the same time, I want to load very high concentration of nanoparticles. Any suggestions?

12 December 2012 8,676 1 View

Is there any way to know the formation of core-shell nanoparticle using UV-visible or PL?

Also I will be more than happy to know some tips on forming core-shell nanoparticles.

12 December 2012 540 8 View