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Title: Electrodynamical forbiddance of a strong quadrupole interaction in surface enhanced optical processes. Experimental confirmation of the existence in fullerene C{sub 60}

Abstract

It is demonstrated that in the SERS and SEIRA spectra of the fullerene C{sub 60}, the lines, which are forbidden in usual Raman and IR spectra and allowed in SERS and SEIRA, are absent. In addition the enhancement SERS coefficient in a single molecule detection regime is ~10{sup 8} instead of the value 10{sup 14}–10{sup 15}, characteristic for this phenomenon. These results are explained by the existence of so-called electrodynamical forbiddance of a strong quadrupole light-molecule interaction, which arises because of belonging of C{sup 60} to the icosahedral symmetry group and due to the electrodynamical law divE = 0.

Authors:
 [1];  [2]
  1. Russian Academy of Sciences, Ioffe Physical Technical Institute (Russian Federation)
  2. State University of Information Technologies, Mechanics and Optics (Russian Federation)
Publication Date:
OSTI Identifier:
22617070
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Experimental and Theoretical Physics; Journal Volume: 124; Journal Issue: 2; Other Information: Copyright (c) 2017 Pleiades Publishing, Inc.; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; DETECTION; FORBIDDEN TRANSITIONS; FULLERENES; INFRARED SPECTRA; INTERACTIONS; MOLECULES; QUADRUPOLES; RAMAN SPECTRA; SURFACES; SYMMETRY GROUPS; VISIBLE RADIATION

Citation Formats

Polubotko, A. M., E-mail: alex.marina@mail.ioffe.ru, and Chelibanov, V. P., E-mail: Chelibanov@gmail.com. Electrodynamical forbiddance of a strong quadrupole interaction in surface enhanced optical processes. Experimental confirmation of the existence in fullerene C{sub 60}. United States: N. p., 2017. Web. doi:10.1134/S1063776117010058.
Polubotko, A. M., E-mail: alex.marina@mail.ioffe.ru, & Chelibanov, V. P., E-mail: Chelibanov@gmail.com. Electrodynamical forbiddance of a strong quadrupole interaction in surface enhanced optical processes. Experimental confirmation of the existence in fullerene C{sub 60}. United States. doi:10.1134/S1063776117010058.
Polubotko, A. M., E-mail: alex.marina@mail.ioffe.ru, and Chelibanov, V. P., E-mail: Chelibanov@gmail.com. Wed . "Electrodynamical forbiddance of a strong quadrupole interaction in surface enhanced optical processes. Experimental confirmation of the existence in fullerene C{sub 60}". United States. doi:10.1134/S1063776117010058.
@article{osti_22617070,
title = {Electrodynamical forbiddance of a strong quadrupole interaction in surface enhanced optical processes. Experimental confirmation of the existence in fullerene C{sub 60}},
author = {Polubotko, A. M., E-mail: alex.marina@mail.ioffe.ru and Chelibanov, V. P., E-mail: Chelibanov@gmail.com},
abstractNote = {It is demonstrated that in the SERS and SEIRA spectra of the fullerene C{sub 60}, the lines, which are forbidden in usual Raman and IR spectra and allowed in SERS and SEIRA, are absent. In addition the enhancement SERS coefficient in a single molecule detection regime is ~10{sup 8} instead of the value 10{sup 14}–10{sup 15}, characteristic for this phenomenon. These results are explained by the existence of so-called electrodynamical forbiddance of a strong quadrupole light-molecule interaction, which arises because of belonging of C{sup 60} to the icosahedral symmetry group and due to the electrodynamical law divE = 0.},
doi = {10.1134/S1063776117010058},
journal = {Journal of Experimental and Theoretical Physics},
number = 2,
volume = 124,
place = {United States},
year = {Wed Feb 15 00:00:00 EST 2017},
month = {Wed Feb 15 00:00:00 EST 2017}
}
  • The first easily reproduced solution-phase synthesis of K{sub x}C{sub 60} and the confirmation of T{sub c} at 18.0+-0.1K are reported herein. The reduction of C{sub 60} in solution with excess K was found to lead to a superconducting K{sub x}C{sub 60} rather than a highly resistive material as expected. The solution method of preparation is much simpler that the vapor-phase K transfer and reaction. The actual compound composition is not yet known. 17 refs., 2 figs.
  • The reactions in the C{sub 60}-(TiCl{sub 4} + Br{sub 2}) system have been performed in ampoules at elevated temperatures. The molecular structure of the fullerene halides (C{sub 60}Cl{sub 5}){sub 2}, C{sub 60}X{sub 6}, C{sub 60}X{sub 8}, and C{sub 60}X{sub 24} (X = Cl, Br) has been determined and refined using single-crystal X-ray diffraction. It has been established that an increase in the bromine concentration results in an increase in the number of halogen atoms attached to the fullerene cage and in an increase in the relative fraction of bromine atoms in mixed halogen derivatives from almost pure chlorides (C{sub 60}Cl{submore » 5}){sub 2} and C{sub 60}Cl{sub 6} to halides C{sub 60}X{sub 8} and C{sub 60}X{sub 24} with a high relative bromine content.« less
  • To establish the fundamental understanding of the fragmentation dynamics of highly positive charged nano- and bio-materials, we carried out on-the-fly classical trajectory calculations on the fragmentation dynamics of C{sub 60}{sup q+} (q = 20–60). We used the UB3LYP/3-21G level of density functional theory and the self-consistent charge density-functional based tight-binding theory. For q ≥ 20, we found that a two-step explosion mechanism governs the fragmentation dynamics: C{sub 60}{sup q+} first ejects singly and multiply charged fast atomic cations C{sup z+} (z ≥ 1) via Coulomb explosions on a timescale of 10 fs to stabilize the remaining core cluster. Thermal evaporationsmore » of slow atomic and molecular fragments from the core cluster subsequently occur on a timescale of 100 fs to 1 ps. Increasing the charge q makes the fragments smaller. This two-step mechanism governs the fragmentation dynamics in the most likely case that the initial kinetic energy accumulated upon ionization to C{sub 60}{sup q+} by ion impact or X-ray free electron laser is larger than 100 eV.« less
  • An energy-independent multipole analysis based on experimental data exclusively on the photoproduction of pions at protons demonstrates a resonant electric quadrupole transition ..gamma../sub p/..--> delta../sup +//sub 33/. This result confirms that the nucleon and the isobar have a d-wave admixture due to a tensor interaction between quarks.
  • P-aminothiophenol (PATP) is a well-known molecule for the preparation of self-assembled monolayers on gold via its thiol functional group. After adsorption, it has been demonstrated that this molecule is anchored to gold through its thiol group, and standing nearly upright at the surface with the amino functional group on top. This molecule has been extensively studied by surface enhanced Raman spectroscopy but its exact SERS spectrum remains unclear. Here, we demonstrate that it can be strongly affected by at least two experimental parameters: laser power and layer density. Those features are discussed in terms of a dimerization of the PATPmore » molecules. The free amino group affords the adsorption of other molecules such as C{sub 60}. In this case, a complex multilayer system is formed and the question of its precise characterisation remains a key point. In this article, we demonstrate that surface enhanced Raman spectroscopy combined with x ray photoelectron spectroscopy can bring very important information about the organization of such a self-assembled multilayer on gold. In our study, the strong evolution of Raman modes after C{sub 60} adsorption suggests a change in the organization of aminothiophenol molecules during C{sub 60} adsorption. These changes, also observed when the aminothiophenol layer is annealed in toluene, do not prevent the adsorption of C{sub 60} molecules.« less