What are the parameters for coating SiO2 thin film using a Thermal Evaporator?

I have seen many works reporting the use of thermal evaporation technique but they seldom give details about the source, boat and other detailed parameters. Can anyone guide me with these details?

04 May 2017 8,294 4 View

How do you calculate the electron density of a nanomaterial?

08 September 2014 691 7 View

How to determine fluorescent decay rates (radiative and non-radiative) of a dye?

I have a nanosecond pulsed laser. How can I find out radiative and non-radiative decay rates of a dye molecule using this nanosecond pulsed laser? Can you suggest some simple experimental methods...

07 August 2014 3,165 14 View

How can I prepare carbon dots with absorption maxima around 405nm?

I have read about synthesis of carbon dots by various means like thermal and microwave mediated. Does anyone know a reliable method to synthesize carbon dots which have absorption maxima around or...

02 March 2014 5,381 1 View

Which tape should I use to create a well on a glass slide for doing Sandwich assay?

I want to do Sandwich assay on a glass slide. I have read in some papers that they use a "tape" with rectangular hole to cover the slide. This rectangular hole is used as well for carrying out the...

01 February 2014 5,676 2 View

Can anyone suggest a good CVD or PVD equipment?

The applications may include metal thin film deposition, semicondicting layer deposition and carbonaceous thin film deposition. Which one is preferable with respect to cost, ease of working etc?...

08 September 2013 464 8 View

Is there any other way to deposit Nanometer silver thin film other than using CVD or PVD instruments?

Can we deposit silver or gold thin film of nanometer thickness using techniques other than vapor deposition techniques?

08 September 2013 7,947 6 View

Is there any software to convert an image into a spectrum or to get XYZ or LAB values of the image?

When we use picasa we can notice a spectrum of the image that is displayed in the window and it shows various details about the image.. Also if the image is a single color image it can be...

07 August 2013 9,097 11 View

What is optical band gap and electrical band gap?

Is there any way to find out optical band gap and electrical band gap using simple instruments like UV-Vis spectrophotometer? What are the parameters that influence the band gap in a metal thin...

06 July 2013 2,742 3 View

How to setup a film thickness measurement instrument based on Tolansky method?

Please share your experin=ence and knowledge in setting up an Interferometric thin film thickness measuring instrument. I want a detailed step by step protocol to follow. I googled for it but in...

06 July 2013 9,169 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 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

How the parameters (such as Mw, Chemical bonds, polymer bland and so on) affect the mechanic property of polymer (such as storage, loss modulus) ?

Anyone can recommend any books on such topics? Thanks in advance.

02 March 2021 8,457 2 View

How do I determine the degree of polymerization of PEG 400 based on NMR integration?

Hello, I am working on the photocatalytic degradation of PEG 400. I would like to know if it's possible to determine the degree on polymerization based on NMR integration, or by the MW of the...

02 March 2021 6,186 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

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

POlymer+DMSO solution and moisture??

What could be the reason of moisture at the sides of Vial when I am preparing my polmyer+DMSO solution for membrane fabrication? What etiquettes I am possibly missing here?

28 February 2021 6,516 5 View