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).

02 March 2018 1,515 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.

10 November 2017 8,793 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?

02 March 2016 3,172 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.

11 December 2015 4,694 10 View

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

10 November 2014 6,682 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?

07 August 2014 356 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.

03 April 2014 7,215 0 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?

01 February 2014 1,604 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.

31 December 2013 703 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...

11 December 2013 8,464 11 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 is the production process of CaFe ferroalloys?

I looking for ferro calcium production process

03 March 2021 1,755 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

12% ledeburitic cold work tool steel, etched for revealing retained austenite, any help for clarifying?

Hello everyone. Given microstructure image belongs to a 12% ledeburitic cold work tool steel (annealed and tempered). The sample was etched with picral (100 mL ethanol and 4 g picric acid). I...

02 March 2021 4,119 3 View

How Can I bring as much common elements in steel as possible to calculate stable phase(s) in OpenCalphad?

As I was tweaking step-by-step OpenCalphad6 Macros step1.ocm involving phase and thermal property calculation of a High-speed steel, I could not incorporate more than 6 elements in the steel...

01 March 2021 8,840 1 View

How can you bring two structures together to create an adhesive bond in LAMMPS?

I have created an Ice 1h crystalline structure and an Aluminium substrate structure and equilibrated both at 250K. Now I need to bring them together in a way that an adhesive bond is created....

01 March 2021 3,325 2 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

Distribution of particles in metal matrix?

How would define the "good" and "poor" distribution of particles within the matrix. Is there a quantitative solution to assess the distribution of the particles, which then having denotation of...

28 February 2021 7,397 8 View