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Seeing Molecules by Eye: Surface Plasmon Resonance Imaging at Visible Wavelengths with High Spatial Resolution and Submonolayer Sensitivity


  • This work was carried out in part in the Frederick Seitz Materials Research Laboratory Central Facilities, University of Illinois, which are partially supported by the U.S. Department of Energy under grants DE-FG02-07ER46453 and DE-FG02-07ER46471. We also acknowledge the support by the National Science Foundation (CHE 04-02420). S.K.G. was supported by the Office of Basic Energy Sciences, Division of Chemical Sciences, Geosciences, and Biosciences, U.S. Department of Energy (DE-AC02-06CH11357). We also thank the transmission and scanning electron microscope teams, especially Dr. Jianguo Wen, at the Frederick Seitz Materials Research Laboratory and the Imaging Technology Group at the Beckman Institute for Advanced Science and Technology.


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Plasmonic crystal optics: Highly uniform, fully 3D plasmonic crystals exhibiting exceptional analytical sensitivity at visible wavelengths can image surface binding events with high spatial resolution and can distinguish adsorbates with masses that differ by only 25 amu. The picture shows a transmitted white-light plasmonic image of microcontact-printed lines (ca. 8 μm wide) of 1-octadecanethiol on the Au surface of a 3D plasmonic crystal.

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