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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Raschke, Markus B. Muller, Eric A. Bechtel, Hans A. Martin, Michael C. Olmon, Robert L. |
| Description | Author Affiliation: Bechtel HA ( Advanced Light Source Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720); Muller EA ( Departments of Physics andChemistry, University of Colorado, Boulder, CO 80309); Olmon RL ( Departments of Physics andChemistry, University of Colorado, Boulder, CO 80309); Martin MC ( Advanced Light Source Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720); Raschke MB ( Departments of Physics andChemistry, University of Colorado, Boulder, CO 80309); |
| Abstract | Characterizing and ultimately controlling the heterogeneity underlying biomolecular functions, quantum behavior of complex matter, photonic materials, or catalysis requires large-scale spectroscopic imaging with simultaneous specificity to structure, phase, and chemical composition at nanometer spatial resolution. However, as with any ultrahigh spatial resolution microscopy technique, the associated demand for an increase in both spatial and spectral bandwidth often leads to a decrease in desired sensitivity. We overcome this limitation in infrared vibrational scattering-scanning probe near-field optical microscopy using synchrotron midinfrared radiation. Tip-enhanced localized light-matter interaction is induced by low-noise, broadband, and spatially coherent synchrotron light of high spectral irradiance, and the near-field signal is sensitively detected using heterodyne interferometric amplification. We achieve sub-40-nm spatially resolved, molecular, and phonon vibrational spectroscopic imaging, with rapid spectral acquisition, spanning the full midinfrared (700-5,000 cm(-1)) with few cm(-1) spectral resolution. We demonstrate the performance of synchrotron infrared nanospectroscopy on semiconductor, biomineral, and protein nanostructures, providing vibrational chemical imaging with subzeptomole sensitivity. |
| ISSN | 00278424 |
| e-ISSN | 10916490 |
| Journal | Proceedings of the National Academy of Sciences of the United States of America |
| Issue Number | 20 |
| Volume Number | 111 |
| Language | English |
| Publisher | National Academy of Sciences |
| Publisher Date | 2014-05-01 |
| Publisher Place | United States |
| Access Restriction | Open |
| Subject Keyword | Microscopy Nanotechnology Spectrophotometry, Infrared Electrons Fourier Analysis Interferometry Microscopy, Atomic Force Instrumentation Phonons Reproducibility Of Results Semiconductors Signal Processing, Computer-Assisted Silicon Dioxide Chemistry Surface Properties Synchrotrons Vibration Research Support, U.S. Gov't, Non-P.H.S. Multidisciplinary |
| Content Type | Text |
| Resource Type | Article |
| Subject | Multidisciplinary |
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