NANOTECHNOLOGY

NANOTECHNOLOGY: Prof. Ninad Mehendale2017Prof. Ninad Mehendale1

Electric arc process2017Prof. Ninad Mehendale2

Application2017Prof. Ninad Mehendale3

X-Ray Diffraction

What is X-Ray Diffraction?

Non destructive analytical technique for identification and quantitively determination of various crystalline forms, known as phases

-Non destructive analytical technique for identification and quantitive determination of various crystalline forms, known as phases-Identification is achieved by comaparing the X-ray diffraction pattern5

X-Ray Diffraction and The Braggs Law

Max Von Laue

William Lawrence BraggWilliam Henry Bragg

X-Ray Diffraction and The Braggs Law

Max Von Laue

William Lawrence BraggWilliam Henry Bragg

BRAGGS LAW

Identification is achieved by comparing the X-ray diffraction pattern

BRAGGS LAW

COMPONENTS OF XRD MACHINE

HOW DIFFRACTION WORKS?

HOW DIFFRACTION WORKS?

Applications of XRDFind structure to determine function of proteinsDistinguish between different crystal structures with identical compositionsStudy crystal deformation and stress propertiesStudy of rapid biological and chemical propertiesCrystallographic applications

Spectroscopyis the study of the interaction betweenmatter andradiated energy.It originated through the study ofvisible lightdispersed according to itswavelength, by aprism. Spectroscopyis the measurement of radiation intensity as a function of wavelength.SPECTROSCOPY

The Electromagnetic Spectrum

RAMAN SPECTROSCOPY Raman Spectroscopy is a technique that uses scattered light resulting from photonmolecule collisions to investigate molecular properties.

RAMAN SPECTROSCOPY

RAMAN SCATTERING

RAMAN SPECTROSCOPYStokes Lines: Energy shifted downAnti-Stokes: Energy shifted upRaman scattering is governed by the polarizability of the electron cloud of the sample

A MODERN RAMAN SPECTROMETER

Basic Applications of Raman SpectroscopyIdentification of compound by matching the spectrum of unknown with reference spectrum (fingerprint). Determination of molecular composition of surfaces.Identification of all type of inorganic compounds in solid and aqueous solution.Detection of molecular impurities and additives.

MICROWAVE SPECTROSCOPYMicrowave rotational spectroscopy uses microwave radiation to measure the energies of rotational transitions for molecules in the gas phase.

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MICROWAVE SPECTROSCOPY

It is mainly used to get information about gas molecules, such as1. Accurate bond lengths and angles.2. Electric dipole moments.3. Centrifugal distortion constants. It can also be used to study dielectric constants, dipole moments in liquids and solutions, and potential energy barriers to rotation

Q. 1 Explain Vacuum synthesis in detail? [5M]2017Prof. Ninad Mehendale25

Q. 2 Explain Gas evaporation technique in detail? [10M]2017Prof. Ninad Mehendale26

Q. 3 Explain Condensed phase synthesis in detail? [5M]2017Prof. Ninad Mehendale27