Why color of nanoparticles change with its shape?

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What accounts for absorption LSPR shifting to shorter wavelength regions over EM spectrum with increasing metal nanosphere size?

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Does any one know how i can prepare liver tissue with transmission electron microscope with good fixation?

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I need to image mesoporous silica nanoparticles that are in ~100 nm size and do high resolution TEM to look at mesopores. what grids should I use?

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Shall I skip the measurement model in SmartPLS?

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Can chitosan alone can act as a reducing agent for Cu(0) nanoparticle sythesis?

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What is the state of the drug inside solid lipid nanoparticles (SLNs)?

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How to check the uv-vis absorption of nanoparticle by surface plasmon resonance?

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Distribution of particles in metal matrix?

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SEM or Multiple Regression for an analysis without Latent Variables?

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Jagdeep Singh

Dear Akanksha Bhardwaj,

The interaction of nanoparticles with light (photon) is depend upon their environment (refractive index etc.), size or physical dimension. When Oscillating electric fields of a light is propagating near a colloidal nanoparticle they interact with the free electrons and causing the collectively oscillation of free electron same with the frequency of visible light. This resonant oscillation is called surface plasmon. If the any physical parameter as already mentioned is changed the interaction of light with nanoparticles is changed. Hence they showed different colour.

Jules Lloyd Hammond

Hello Akanksha Bhardwaj ,

You may find my review paper helpful:

Article Localized Surface Plasmon Resonance as a Biosensing Platform...

See section 1.1.2 for more details (Figure 2). You will also find specific references regarding dependence on shape and/or size.

You can see from Equation 1 that the extinction is linked to the areal density, radius and aspect ratio - all physical properties of the nanostructures.