Purvi Kikani

12 Questions 20 Answers 0 Followers

Questions related from Purvi Kikani

Reduction in bacterial adhesion on to polymer surface is helpful or complete prevention can only solve the problem?

I am working on fabricating anti-bacterial polymer surface using surface modification techniques. I would like to understand whether substantial reduction in bacterial adhesion on to polymeric...

07 July 2018 503 1 View

Why do we write an imaginary term in any simple harmonic motion / wave equation such as exp i(kx-wt) ? what is the origin and physical significance ?

what is the origin and significance of writing imaginary term exp i(kx-wt) in the wave equation ?

01 January 2018 3,289 12 View

When we consider small perturbation in plasma oscillation, how small ?

We consider small perturbation in plasma to understand the concept of plasma oscillation. We take perturbation in velocity, density and electric field. que-1 how do we create this perturbation...

01 January 2018 7,685 6 View

Can somebody explain what is isothermal and what is adiabatic compression in case of electron and ion waves in plasma ?

In case of electron plasma waves we consider adiabatic compression and take gamma equal to 3 [using equation (2+N)/N]. what do we mean by adiabatic compression here?I mean physical significance....

01 January 2018 9,638 1 View

How to interpreat SiOx film structures (liner, network or cage like) deposited by plasma cvd from FTIR and HRSEM Images ??

I am depositing SiOx films using HMDSO / Oxygen gas mixture by low pressure RF PECVD method. In FTIR spectra I get two overlapped peaks around 1050 cm-1 and 1135 cm-1. Does this have any relation...

10 October 2015 9,996 9 View

Can someboy help me to understand wetting of Polymer surface ?

I am giving a plasma treatment to polyethylene (PE) surface. Wetting time (time taken to completely wet the PE surface) on plasma treated polymer surface changes as a function of one of my...

04 April 2015 7,245 6 View

Why is the surface functionalization of Polyester / PET fabric not revealed by FTIR method?

I am trying to see the presence of functional groups on air plasma treated polyester / PET surface by ATR-FTIR method. Getting good wettability improvement after plasma treatment, but unable to...

07 July 2014 7,736 17 View

Is it possible to develop patterned superhydrophobic/hydrophilic surface using the plasma method?

I want to develop a patterned super hydrophobic/hydrophilic surface on a glass/silicon surface. Please suggest any methods that involve plasma processing without the use of halogens.

06 June 2014 1,267 2 View

How can we understand plasma dynamics in the PECVD coating process?

I want to understand the effect of plasma parameters on coating characteristics for deposition of SiOx and SiOxNy thin films using the PECVD method.

05 May 2014 9,242 2 View

How does thickness of the gas diffusion layer (coating of SiOx deposited on Polyethylene) play a role in determining gas transmission rate ?

I want to understand how gas transmission rate is dependent on the thickness of the diffusion barrier coating deposited on a polymer substrate. Why is the preferred thickness of the diffusion...

04 April 2014 2,617 6 View

Why do FTIR peak shifts to a higher or lower wave number side?

I am depositing SiOx film from HMDSO / Oxygen mixture. I am observing shift in the Si - O - Si peak at 1056 cm-1 towards a lower or higher wave number side while varying experimental parameters....

04 April 2014 1,124 11 View

In a typical diatomic molecular vibration, how much does the bond length change during natural vibration?

And how much does it increase after IR absorption? What is the change in bond length at a natural frequency of vibration and at a given IR energy, for the C=O bond for example?

03 March 2014 7,543 4 View