The phenomenon of single-molecule detection by the SERS method and the SERS quadrupole theory

被引:15
作者
Polubotko, AM [1 ]
机构
[1] Russian Acad Sci, AF Ioffe Physicotech Inst, St Petersburg, Russia
来源
JOURNAL OF OPTICS A-PURE AND APPLIED OPTICS | 1999年 / 1卷 / 06期
关键词
quadrupole SERS theory; single-molecule detection;
D O I
10.1088/1464-4258/1/6/102
中图分类号
O43 [光学];
学科分类号
070207 ; 0803 ;
摘要
On the basis of quadrupole SERS theory, developed by the author, the enormous SERS coefficients observed in the works of Kneipp and co-workers are obtained. For some models of single particles the enhancement coefficient may reach enormous values in the range 10(10)-10(16). These models are similar to the particles of rod-like and faceted forms revealed in the experiments of Emery and Nie and previously used in quadrupole SERS theory. In rudimentary terms the enormous SERS arises as a consequence of the large molecules situated near the wedges and tips of the large particles. The results demonstrate, that single-molecule detection with SERS cannot be explained simply by the enhancement of the electric field and by the dipole interaction, but that the strong quadrupole light-molecule interactions also have to be taken into account. Moreover, it appears that one cannot use the multiple expansion due to the singular behaviour of the electromagnetic held near the crossing of facets and sharp points of some separate particles. However, in spite of the fact that our estimations based on the quadrupole interaction can explain the experimental results, due to their crudeness we are forced to suppose the possible influence of the precise configuration of the electromagnetic field near the crossing of facets and rod-like particles.
引用
收藏
页码:L18 / L20
页数:3
相关论文
共 10 条
  • [1] Emory S. R., 1997, SCIENCE, V275, P1102
  • [2] Screening and enrichment of metal nanoparticles with novel optical properties
    Emory, SR
    Nie, S
    [J]. JOURNAL OF PHYSICAL CHEMISTRY B, 1998, 102 (03): : 493 - 497
  • [3] Kneipp K., 1988, Experimentelle Technik der Physik, V36, P161
  • [4] Single-molecule detection of a cyanine dye in silver colloidal solution using near-infrared surface-enhanced Raman scattering
    Kneipp, K
    Kneipp, H
    Deinum, G
    Itzkan, I
    Dasari, RR
    Feld, MS
    [J]. APPLIED SPECTROSCOPY, 1998, 52 (02) : 175 - 178
  • [5] Single molecule detection using surface-enhanced Raman scattering (SERS)
    Kneipp, K
    Wang, Y
    Kneipp, H
    Perelman, LT
    Itzkan, I
    Dasari, R
    Feld, MS
    [J]. PHYSICAL REVIEW LETTERS, 1997, 78 (09) : 1667 - 1670
  • [6] Kneipp K., 1995, Experimental Technique of Physics, V41, P225
  • [7] SERS PHENOMENON AS A MANIFESTATION OF QUADRUPOLE INTERACTION OF LIGHT WITH MOLECULES
    POLUBOTKO, AM
    [J]. PHYSICS LETTERS A, 1990, 146 (1-2) : 81 - 84
  • [8] Regularities of the SER spectra of symmetrical molecules
    Polubotko, AM
    [J]. PURE AND APPLIED OPTICS, 1998, 7 (01): : 99 - 113
  • [9] ABOUT THE SERS PHENOMENON .1. THE CROSS-SECTION IN ADIABATIC PERTURBATION-THEORY
    POLUBOTKO, AM
    [J]. PHYSICA STATUS SOLIDI B-BASIC RESEARCH, 1989, 156 (02): : 677 - 686
  • [10] POLUBOTKO AM, 1987, PHYS I