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Spectroscopy in sculpted fields

Paper ID Volume ID Publish Year Pages File Format Full-Text
32849 44945 2009 11 PDF Available
Title
Spectroscopy in sculpted fields
Abstract

SummaryMetallic and magnetic nanostructures set electromagnetic boundary conditions which can lead to highly contorted fields in their immediate vicinity. While much attention has been devoted to enhancements in electric field strength, we argue that equally interesting phenomena arise from enhancements in magnetic and electric field gradients. Nonuniform fields near nanostructures can induce molecular transitions that are forbidden by electric dipole selection rules. We illustrate this claim with two examples. “Superhelical” electromagnetic fields are predicted to show enhanced asymmetry in their interaction with chiral molecules, far greater than that due to circularly polarized light. Such fields could be used to induce chiral photochemistry with large enantiomeric excess. Steeply varying DC magnetic fields are predicted to enhance the rate of intersystem crossing in molecular bi-radicals. Such fields could provide a route to new nanomagnetic catalysts and to magnetic control of chemical reactions.

Keywords
SERS; SEROA; Chirality; Superhelical light; Intersystem crossing; Magnetic field effect
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Spectroscopy in sculpted fields
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Publisher
Database: Elsevier - ScienceDirect
Journal: - Volume 4, Issue 3, June 2009, Pages 269–279
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us