The molecular level specificity provided by Raman spectroscopy (RS) has made it a widely used spectroscopic tool for the determination of molecular structure and compound identification. Dr. Tyagi’s group has been studying Surface Enhanced Raman Scattering (SERS) in fractal aggregates fabricated from nano-particle printing inks. Fractal aggregates of metallic colloidal particles can provide hyper- enhancement for various linear and nonlinear optical responses, including RS. Such enhancement results from the localization of optical plasmon excitations within small parts (“hot-spots” a few to tens of nm in size) of a fractal aggregate. Since fractals are scale-invariant they, unlike translationally-invariant media, do not support propagating waves and hence can ‘trap’ electromagnetic field in very small volumes. When sufficiently concentrated, the large electromagnetic fields in the hot spots can result in very large SERS enhancement.
are mostly down South but we Youth Mason Raymond Jersey live in the Midwest, that means he doesn’t have to miss any of his favorite games with DIRECTV. So when we first moved here, we compared DIRECTV vs Dish Network and they have, by far, better sports packages. Its not just the sports packages that we considered when we were comparing DIRECTV vs Dish Network. We have kids in our family ranging from age 5 to age 17. So Authenitc Dennis Wideman Jersey we wanted to make sure we would be able to get educational programs and the cartoon channels. With DIRECTV the kids can choose from Disney, Nickelodeon, Discovery Kids, and Noggin. The teenagers wanted MTV and Comedy Authenitc Dennis Wideman Jersey Central and our Direct TV Deal has them both. And I’m a big film buff so I had to have my movie channels too, like Turner Classic Movies, HBO, Starz, and even the Sundance Channel and Independent Film Channel so I can enjoy movies that don’t always make it to our local theater. My husband and I both like watching documentaries and DIRECTV offers Discovery, History International, The Biography
The Promise of Nanotechnology
“The use of nanotechnology in consumer products and industrial applications is growing rapidly, with the products listed in the inventory showing just the tip of the iceberg. How consumers respond to these early products — in food, electronics, health care, clothing and cars — will be a litmus test for broader market acceptance of nanotechnologies in the future.”
–Andrew D. Maynard
Chief Science Advisor, Project on Emerging Nanotechnologies
Woodrow Wilson International Center for Scholars