Espalhamento Raman

Introdução

Espalhamento de luz

http://www.andor.com/learn/applications/?docid=64

Modificação na freqüência

Freqüênciamodificada

Freqüênciaincidente

Freqüênciacaracterísticado material

Espectro

http://commons.wikimedia.org/wiki/File:Raman_spectra_of_drugs.jpg

2TA(X)

Ac & opt. in

2TO(X)2TO(W)2TO(L)

Os dois lados da moeda

http://www.smartec.ch/images/Scattering_spectra.gif

Esquema de níveis de energia

Montagem experimental típica

http://www.andor.com/learn/applications/?docid=64

Montagem experimental

Montagem experimental

http://spectra.phy.bris.ac.uk/Media/InVia%20anime.gif

Modelo do oscilador harmônico

http://131.104.156.23/Lectures/CHEM_207/vibrational_spectroscopy

Efeitos isotópicos

Spatial correlation model

Modos normais de vibração

Representation of two normal modes of benzene

http://mvl.chem.tu-berlin.de/ak_hildebrandt/hildebrandt/methods/VibrationalSpectroscopy.html

Plasmônica aplicada: SERS

http://www.ipht-jena.de/uploads/pics/sers-schema_425_03.jpg

Surface Enhanced Raman Scattering

Vencendo a difração

Nanotubos de carbono

Sofisticações: TERS

http://spie.org/Images/Graphics/Newsroom/Imported/426/426_fig2.jpg

Tip Enhanced Raman Scattering

Coherent Anti-Stokes Raman Scattering (CARS)

http://en.wikipedia.org/wiki/File:CARS_diagram.png

Raman ressonante

Real

Transições ópticas

http://hyperphysics.phy-astr.gsu.edu/HBASE/molecule/molec.html#c2

Raman optical activity (ROA)

Hen Lysozymehttp://www.chem.gla.ac.uk/staff/laurence/recent_roa_talk.ppt#259,13,Hen Lysozyme

Aplicações

Raman diagnostic tool detects eye diseaseMEDICAL SPECTROSCOPY

http://www.laserfocusworld.com/display_article/119897/12/none/none/News/Raman-diagnostic-tool-detects-eye-disease

Aplicações

Raman studies may help predict bone fractureSPECTROSCOPY

http://www.laserfocusworld.com/display_article/101870/12/none/none/News/Raman-studies-may-help-predict-bone-fracture

AplicaçõesRaman scattering reveals macular pigment levels

MEDICAL SENSING

http://www.laserfocusworld.com/

AplicaçõesRaman Spectrometer Probes the Deep

More than two miles below the surface, a curious Pacific grenadier watches the Deep-Ocean Raman In Situ Spectrometer interrogate a pool of liquid CO2 on the sea floor. Courtesy of Peter G. Brewer.

http://www.photonics.com/Content/ReadArticle.aspx?ArticleID=18402

Aplicações

Mobile Raman Targets Chemical Spills

Researchers at Brookhaven National Laboratory have developed a mobile Raman spectroscopy system to remotely assess unknown chemical spills in emergency situations. The system uses 266-nm Raman lidar to target samples more than 1700 feet away.

http://www.photonics.com/Content/ReadArticle.aspx?ArticleID=8282