Size and dimension effect on volume plasmon energy of nanomaterials |
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| Authors: | M Li Z Wang RQ Zhang A Soon |
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| Institution: | 1. School of Physics and Electric Information, Huaibei Normal University, Huaibei 235000, China;2. Department of Materials Science and Engineering, Yonsei University, Seoul, Republic of Korea;1. McDonnell Center for the Space Sciences & Department of Physics, Washington University, St. Louis, MO 63130, USA;2. Russian Research Centre Kurchatov Institute, Moscow, 123182, Russia;3. Moscow Institute of Physics and Technology, Moscow, 123098, Russia;1. Physics Department, Dalian Maritime University, Dalian 116026, China;2. Institute of Modern Physics, Huzhou Teachers College, Huzhou 313000, China;1. Department of Materials Science and Engineering, Northwestern University, Evanston, IL 60208, USA;2. National Center for Electron Microscopy, The Molecular Foundry, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA;1. Department of Physics & Astronomy, University of Tennessee, Knoxville, TN 37996, USA;2. Quantum Condensed Matter Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831, USA;3. Department of Materials Science & Engineering, University of Maryland, College Park, MD 20742, USA;4. NIST Center for Neutron Research, National Institute of Standards and Technology, Gaithersburg, MD, 20899, USA;5. Department of Material Science & Engineering, University of Tennessee, Knoxville, TN 37996, USA;6. Materials Science & Technology Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831, USA |
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| Abstract: | The influence of size and dimension on the volume plasmon energy of nanomaterials is examined, and the effect of band-gap variation and lattice contraction is explicitly included in our improvised phenomenological model. The advantage of this improvised model is the ability to predict the volume plasmon energy for low dimensional materials, literally free from any arbitrarily adjustable parameters. We find that the volume plasmon energy increases almost exponentially with decreasing size and this increase is shown to be the most evident for nanoparticles, as compared to nanowires and nanofilms of the same material. This is largely due to the variation in the surface/volume ratio with dimension modulation. More importantly, our improvised model outperforms other reported ones, bringing our predicted results closest to available experiments. In particular, for semiconducting/semi-metal nanoarchitectures, we demonstrate that the rapid increase in volume plasmon energy of nanomaterials is a direct consequence and interplay of band-gap variation and lattice contraction. |
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