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A Shiny New Tool for Imaging Biomolecules

By Guest PostApril 1, 2012Sciencearrays, berkeley lab, biomolecule, cell, cell membrane, cellular signaling network, chemical signal, christopher rhodes, disease, fluorescent, foreign invader, gold bowtie nanoantennas, gold nanoantenna, gold nanoparticle, hot-spot, hsiung lin tu, immune system, intensity, jay groves, lars iversen, lynn yarris, mark schmidt, optical imaging technique, optical nanoantenna, plasmonics, protein, raman optical signal, theo lohmuller, uc, wan chen lin

*Berkeley Lab Researchers Embed Artificial Membranes with Billions of Nanoantennas for Enhanced Optical Studies*

At the heart of the immune system that protects our bodies from disease and foreign invaders is a vast and complex communications network involving millions of cells, sending and receiving chemical signals that can mean life or death. At the heart of this vast cellular signaling network are interactions between billions of proteins and other biomolecules. These interactions, in turn, are greatly influenced by the spatial patterning of signaling and receptor molecules. The ability to observe signaling spatial patterns in the immune and other cellular systems as they evolve, and to study the impact on molecular interactions and, ultimately, cellular communication, would be a critical tool in the fight against immunological and other disorders that lead to a broad range of health problems including cancer. Such a tool is now at hand. (more…)

Sharpening The Nanofocus: Berkeley Lab Researchers Use Nanoantenna to Enhance Plasmonic Sensing

By Guest PostMay 23, 2011Scienceantenna enhanced gas sensing, berkeley lab, biochemical agents, biosensing, catalytic processes, chemical or biological events, confinement of electromagnetic waves, double electron beam lithography, german ministry of research, Germany, gold nanoantenna, harald giessen, laura na liu, localized surface plasmon resonance, lspr, mario hentschel, metallic nanostructures, ming tang, nanocatalysts, nanofocus, nanoreactors, optical detection, palladium nanoparticle, particle level, paul alivisatos, plasmonics, plasmons, university of california, university of stuttgart, wavelength

Such highly coveted technical capabilities as the observation of single catalytic processes in nanoreactors, or the optical detection of low concentrations of biochemical agents and gases are an important step closer to fruition. Researchers with the U.S. Department of Energy (DOE)’s Lawrence Berkeley National Laboratory (Berkeley Lab), in collaboration with researchers at the University of Stuttgart in Germany, report the first experimental demonstration of antenna-enhanced gas sensing at the single particle level. By placing a palladium nanoparticle on the focusing tip of a gold nanoantenna, they were able to clearly detect changes in the palladium’s optical properties upon exposure to hydrogen. (more…)

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A Shiny New Tool for Imaging Biomolecules

Sharpening The Nanofocus: Berkeley Lab Researchers Use Nanoantenna to Enhance Plasmonic Sensing