Is plasmon red-shift in dielectric medium is actually a blue shift?

Take for example a 20 nm Ag NP with its LSPR in air at 400 nm. Now when this nanoparticle will be in water, light will refract from air to water to interact with it. Since the wavelength of all...

01 February 2020 6,700 4 View

How accurate are different methods for electromagnetic simulations employed for plasmonic nanostructure optical interaction?

My present investigation involves simulation of optical interaction of plasmonic nanostructures using COMSOL Multiphysics (frequency domain analysis). To ensure that my results are free from any...

05 June 2019 6,092 5 View

What are critical numerical parameters for electromagnetic simulation of large nanoparticles?

My COMSOL EM simulations of plasmonic and dielectric nanoparticles do not seem to be correct. For instance, the optical spectra for 100 nm silica nanoparticle is a decay plot as expected. However...

05 June 2019 5,195 2 View

Plasmonics: In a system of two nanoparticles in a medium, will one nanoparticles change the background electric field for the other?

I am trying find the find the extinction cross section of an array of nanoparticles suspended in water. Usually, when there is a substrate present (Ex. glass), we first solve for the background...

06 July 2018 5,812 2 View

Why am I not able to get an absorption and extinction cross section that matches with experimental results?

I am trying to simulate plasmonic resonance of gold nanoparticles in water medium in COMSOL Multiphysics 5.2. I have so far been unsuccessful in reproducing results reported in past works. When I...

05 June 2018 9,833 0 View

Physics: Why do we describe light by referring to its wavelength, but microwaves and radar pulses by referring to their frequency?

In physics, the description of the properties of light generally refers to its wavelength (nm), while in the range of microwaves and radio waves we refer to the frequency of a signal (e.g. kHz or...

03 March 2021 1,682 3 View

Is there any effect of different colours of light (white, red, yellow, blue etc.) on the rate of photosynthesis? If yes, why?

Light is inevitable for the process of photosynthesis reaction. Naturally sunlight plays the vital role for this process. Light may be of different colours like white, red, yellow, blue etc....

02 March 2021 7,890 2 View

Do I need to strip the PVDF membrane before staining it with colloidal gold?

Dear Colleagues, After running Western blot on PVDF membrane and detection using ECL, I would like to stain my PVDF with colloidal gold to be able to allign the ECL image with total proteins on...

02 March 2021 7,829 3 View

In an eye with Tyndall, does each dot correspond to an individual cell?

When you observe the presence of Tyndall in an inflamed eye: Does each of the small floating dots correspond to an individual cell or to an aggregate of cells? Does a conventional slit lamp have...

27 February 2021 6,326 2 View

Why there are two peaks while using the mie plot of Silver nanoparticle?

Hi, I am trying to learn the theoretical modelling of silver nanoparticle using the Mie scattering theory. After that, I discovered a software named Mieplot developed by Philip Laven, where it...

25 February 2021 7,493 6 View

How can I obtain time series data by country on night-time light (brightness) ?

Hi everyone, Please, how can I obtain time series data by country on night-time light (brightness) ? I've tried, but so far all I can find are maps. I am looking for numerical data, especially in...

24 February 2021 8,625 4 View

What are difference between laser diodes, simple light emitting diodes and power light emitting diodes when operated in the visible spectrum ?

I want to illuminate a scene (small space) using LED to capture photographs or videos of some tiny objects inside the space. But am not sure if I should use a Laser LED, or simple LED or power...

22 February 2021 4,240 4 View

How to interpret this FTIR spectrum of pyrolyzed hydrochar?

20 February 2021 2,840 3 View

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The regenerated cellulose film was prepared by zinc chloride/H2O system. The zinc chloride had been washed away in the regeneration process, and the wet film which was not dried had uniform...

18 February 2021 9,538 1 View

How do I plot Pressure against crank angle degree in Fluent?

18 February 2021 8,390 3 View