Controlling the surface enhanced Raman effect via the nanoshell geometry

Jackson, J. B.; Westcott, S. L.; Hirsch, L. R.; West, J. L.; Halas, N. J.
January 2003
Applied Physics Letters;1/13/2003, Vol. 82 Issue 2, p257
Academic Journal
Systematic variation of the internal geometry of a dielectric core-metal shell nanoparticle allows the local electromagnetic field at the nanoparticle surface to be precisely controlled. The strength of the field as a function of core and shell dimension is measured by monitoring the surface enhanced Raman scattering (SERS) response of nonresonant molecular adsorbates (para-mercaptoaniline) bound to the nanoparticle surface. The SERS enhancement appears to be directly and exclusively due to nanoparticle geometry. Effective SERS enhancements of 10[sup 6] are observable in aqueous solution, which correspond to absolute enhancements of 10[sup 12] when reabsorption of Raman emission by nearby nanoparticles is taken into account.


Related Articles

  • GaN-based platforms with Au-Ag alloyed metal layer for surface enhanced Raman scattering. Weyher, J. L.; Polish_hook, I.; Kaminska, A.; Rolinski, T.; Nowak, G.; Hołyst, R. // Journal of Applied Physics;Dec2012, Vol. 112 Issue 11, p114327 

    The fabrication procedure of efficient surface enhanced Raman scattering (SERS) platforms is demonstrated based on reproducibly photo-etched GaN epitaxial layers covered by a thin Au-Ag layer and subjected to partial de-alloying. Using a gold-rich Au57Ag43 alloy (70/30 wt. %), it is possible to...

  • The kinetically dominated overgrowth of flower-like silver nanostructures and its application for surface-enhanced Raman scattering. Ning Zhou; Dongsheng Li; Deren Yang // Key Engineering Materials;2014, Vol. 605, p259 

    Herein flower-like silver nanostructures with different size and ratio of hexagonal close-packed (HCP) to face-centered cubic (FCC) phase were synthetized. By comparing with the results utilizing different surfactants, the growth process of Ag nanostructures has been investigated. Flower-like Ag...

  • FORMATION OF SILICON NANOSTRUCTURED SURFACE BY SELECTIVE CHEMICAL ETCHING. Gabdullin, M. T.; Ismailov, D. V.; Kalkozova, Zh. K.; Sagyndykov, A. B.; Abdullin, Kh. A. // Proceedings of the International Multidisciplinary Scientific Ge;2016, Vol. 1, p135 

    Nanostructured surface of silicon wafers with low reflectivity was obtained in a twostage process by selective chemical etching initiated by metal nanoclusters. Surfaceenhanced Raman scattering (SERS) effect was observed on silicon substrates coated with silver nanoclusters at concentrations of...

  • Variations in Optical Properties of Silver Nanoparticles. Application in Surface Enhanced Raman Spectroscopy. Sato, Roberto; Redón, Rocío; Vázquez, América; Flores, Ocotlán; Zanella, Rodolfo; Saniger, José // AIP Conference Proceedings;4/15/2008, Vol. 992 Issue 1, p1232 

    In the present work, an optical study of silver nanoparticles obtained by different methods is informed. These nanoparticles shown a strong plasmonic bands which depend on size and morphology. The Ag colloids were proved as enhancers of Raman spectroscopy. In all cases they were effective in...

  • Study of enhanced surface Raman scattering on nano-particle in terahertz range. Yudeng Wu; Guangjun Ren // Advanced Materials Research;2014, Vol. 977, p108 

    Researched the surface-enhanced Raman scattering on nanoparticle in terahertz range, and proved the existence of the same phenomenon-Raman enhancements in the terahertz band. By studying the electromagnetic enhancement principle of surface-enhanced Raman scattering, proposed to using finite...

  • Distance Dependent Surface Enhanced Raman and Fluorescence by Supported 2D Assembly of Plasmonic Metal Nanoparticles. AHAMAD, NUR; AL-AMIN, MD.; IANOUL, A. // Asian Journal of Chemistry;Nov2013, Vol. 25 Issue 16, p9226 

    Metal nanoparticles polyelectrolytes nanocomposite substrates consisted of variable number of poly(sodium-4-styrenesulfonate)/ poly(diallyldimethylammonium chloride) bilayers deposited on supported 2D assembly of silver nanoparticles were fabricated using layer by layer deposition technique....

  • A solution to the fabrication and tarnishing problems of surface-enhanced Raman spectroscopy (SERS) fiber probes. Matikainen, Antti; Nuutinen, Tarmo; Vahimaa, Pasi; Honkanen, Seppo // Scientific Reports;2/13/2015, p8320 

    Surface enhanced Raman scattering (SERS) fiber probes have enormous potential in optical sensing applications. However, their widespread use has been hindered by two major obstacles: the difficulty of fabricating the required silver nanostructures on optical fibers and the tarnishing of silver,...

  • Rapid Bacterial Diagnostics Via Surface-Enhanced Raman Microscopy. Premasiri, W. R.; Sauer-Budge, A. F.; Lee, J. C.; Klapperich, C. M.; Ziegler, L. D. // Spectroscopy;May2013, Vol. 28 Issue 5, p52 

    The article presents information on urinary tract infection diagnostics by a surface-enhanced Raman spectroscopy (SERS)-based approach, that encompasses sample preparation, portable Raman microscopy instrumentation, SERS substrates, and novel identification software. It reveals that SERS...

  • Huawei Marine sees "major breakthrough" in 100G technology tests. Pearce, James // Capacity Magazine;10/10/2016, p1 

    Huawei Marine has increased the distance of its advanced 100G technology, enhanced raman amplifier (ERPC) and remote optical pump amplifier (ROPA) to 648.5km in a lab test in Beijing.

  • Aptamer-based surface-enhanced Raman scattering (SERS) sensor for thrombin based on supramolecular recognition, oriented assembly, and local field coupling. Yang, Liyuan; Fu, Cuicui; Wang, Hailong; Xu, Shuping; Xu, Weiqing // Analytical & Bioanalytical Chemistry;Jan2017, Vol. 409 Issue 1, p235 

    A supramolecular recognition and oriented assembly system was developed on chip for the highly selective surface-enhanced Raman scattering (SERS) detection of thrombin by means of the aptamer-based SERS tag method. A 15-base thrombin-binding aptamer (TBA) with a thiol end was first immobilized...


Read the Article


Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics