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Nanoscale near-field infrared spectroscopic imaging of silica-shell/gold-core and pure silica nanoparticles

Abstract

Spectroscopic near-field imaging of single silica-shell/Au-core and pure silica nanoparticles deposited on a silicon substrate is performed in the infrared wavelength range (λ = 9–11 μm) using scattering-type scanning near-field optical microscopy (s-SNOM). By tuning the wavelength of the incident light, we have acquired information on the spectral phonon–polariton resonant near-field interactions of the silica-shell/Au-core and pure silica nanoparticles with the probing tip. We made use of the enhanced near-field coupling between the high index Au-core and the probing tip to achieve spectral near-field contrast of the thin silica coating (thickness < 10 nm). Our results show that spectroscopic imaging of thin coating layers and complex core–shell nanoparticles can be directly performed by s-SNOM.

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References

  • Abate Y, Schwartzberg A, Strasser D, Leone S (2009) Nanometer-scale size dependent imaging of cetyl trimethyl ammonium bromide (CTAB) capped and uncapped gold nanoparticles by apertureless near-field optical microscopy. Chem Phys Lett 474:146–152

    Article  CAS  Google Scholar 

  • Aizpurura J, Taubner T, Abajo F, Drehm M, Hillenbrand R (2008) Substrate-enhanced infrared near-field spectroscopy. Opt Express 16:1529–1545

    Article  Google Scholar 

  • Amarie S, Keilmann F (2011) Broadband-infrared assessment of phonon resonance in scattering-type near-field microscopy. Phys Rev B 83:045404

    Article  Google Scholar 

  • Amarie S, Ganz T, Keilmann F (2009) Mid-infrared near-field spectroscopy. Opt Express 17:21794–21801

    Article  CAS  Google Scholar 

  • Bao A, Lai H, Yang Y, Liu Z, Tao C, Yang H (2010) Luminescent properties of YVO4:Eu/SiO2 core–shell composite particles. J Nanopart Res 12:635–643

    Article  CAS  Google Scholar 

  • Basiruddin S, Saha A, Pradhan N, Jana N (2010) Advances in coating chemistry in deriving soluble functional nanoparticle. J Phys Chem C 114:11009–11017

    Article  CAS  Google Scholar 

  • Berndt I, Pedersen J, Richtering W (2006) Temperature-sensitive core–shell microgel particles with dense shell. Angew Chem Int Ed 45:1737–1741

    Article  CAS  Google Scholar 

  • Brendel R, Bormann D (1992) An infrared dielectric function model for amorphous solids. J Appl Phys 71:1–6

    Article  CAS  Google Scholar 

  • Cvitkovic A, Ocelic N, Aizpurua J, Guckenberger R, Hillenbrand R (2006) Infrared imaging of single nanoparticles via strong field enhancement in a scanning nanogap. Phys Rev Lett 97:060801

    Article  CAS  Google Scholar 

  • Fofang N, Park T, Neumann O, Mirin N, Nordlander P, Halas N (2008) Plexcitonic nanoparticles: plasmon-exciton coupling in nanoshell−j-aggregate complexes. Nano Lett 8:3481–3487

    Article  CAS  Google Scholar 

  • Gozhenko V, Grechko L, Whites K (2003) Electrodynamics of spatial clusters of spheres: substrate effects. Phys Rev B 68:125422

    Article  Google Scholar 

  • Hillenbrand R, Keilmann F (2002) Material-specific mapping of metal/semiconductor/dielectric nanosystems at 10 nm resolution by backscattering near-field optical microscopy. Appl Phys Lett 80:25–27

    Article  CAS  Google Scholar 

  • Hu X, Gao X (2010) Silica–polymer dual layer-encapsulated quantum dots with remarkable stability. ACS Nano 4:6080–6086

    Article  CAS  Google Scholar 

  • Huber A, Ocelic N, Taubner T, Hillenbrand R (2006) Nanoscale resolved infrared probing of crystal structure and of plasmon-phonon coupling. Nano Lett 6:774–778

    Article  CAS  Google Scholar 

  • Huber A, Deutsch B, Novotny L, Hillenbrand R (2008a) Focusing of surface phonon polaritons. Appl Phys Lett 92:203104

    Article  Google Scholar 

  • Huber A, Keilmann F, Wittborn J, Aizpurua J, Hillenbrand R (2008b) Terahertz near-field nanoscopy of mobile carriers in single semiconductor nanodevices. Nano Lett 8:3766–3770

    Article  CAS  Google Scholar 

  • Huber A, Wittborn J, Hillenbrand R (2010) Infrared spectroscopic near-field mapping of single nanotransistors. Nanotechnology 21:235702

    Article  CAS  Google Scholar 

  • Kim Z, Leone S (2006) High-resolution apertureless near-field optical imaging using gold nanosphere probes. J Phys Chem B 110:19804–19809

    Article  CAS  Google Scholar 

  • Kim D, Heo J, Ahn S, Han S, Yun W, Kim Z (2009) Real-space mapping of the strongly coupled plasmons of nanoparticle dimers. Nano Lett 9:3619–3625

    Article  CAS  Google Scholar 

  • Knoll B, Keilmann F (2000) Enhanced dielectric contrast in scattering-type scanning near-field optical microscopy. Opt Commun 182:321–328

    Article  CAS  Google Scholar 

  • Lawrie G, Battersby B, Trau M (2003) Synthesis of optically complex core–shell colloidal suspensions: pathways to multiplexed biological screening. Adv Funct Mater 13:887–896

    Article  CAS  Google Scholar 

  • Ocelic N, Huber A, Hillenbrand R (2006) Pseudoheterodyne detection for background-free near- field spectroscopy. Appl Phys Lett 89:101124

    Article  Google Scholar 

  • Ogawa Y, Minami F, Abate Y, Leone S (2010) Nanometer-scale dielectric constant of Ge quantum dots using apertureless near-field scanning optical microscopy. Appl Phys Lett 96:063107

    Article  Google Scholar 

  • Schnell M, Garcia-Etxarri A, Huber A, Crozier K, Aizpurua J, Hillenbrand R (2009) Controlling the near-field oscillations of loaded plasmonic nanoantennas. Nature Photon 3:287–297

    Article  CAS  Google Scholar 

  • Stiegler J, Abate Y, Cvitkovic A, Romanyuk Y, Huber A, Leone S, Hillenbrand R (2011) Nanoscale infrared absorption spectroscopy of individual nanoparticles enabled by scattering-type near-field microscopy. ACS Nano 5:6494–6499

    Article  CAS  Google Scholar 

  • Teng F, Tian Z, Xiong G, Xu Z (2004) Preparation of CdS–SiO2 core-shell particles and hollow SiO2 spheres ranging from nanometers to microns in the nonionic reverse microemulsions. Catal Today 93:651–656

    Article  Google Scholar 

  • Wang Y, Dave R, Pfeffer R (2004) Polymer coating/encapsulation of nanoparticles using a supercritical anti-solvent process. J Supercrit Fluids 28:85–99

    Article  CAS  Google Scholar 

  • Wiederrecht G, Wurtz G, Hranisavljevic J (2004) Coherent coupling of molecular excitons to electronic polarizations of noble metal nanoparticles. Nano Lett 4:2121–2125

    Article  CAS  Google Scholar 

  • Yu M, Lin J, Fang J (2005) Silica spheres coated with YVO4:EU3+ layers via sol−gel process: a simple method to obtain spherical core−shell phosphors. Chem Mat 17:1783–1791

    Article  CAS  Google Scholar 

  • Zimmer J, Kim S, Ohnishi S, Tanaka E, Frangioni J, Bawendi M (2006) Size series of small indium arsenide-zinc selenide core-shell nanocrystals and their application to in vivo imaging. J Am Chem Soc 128:2526–2527

    Article  CAS  Google Scholar 

  • Zou B, Little R, Wang J, Sayed-El M (1999) Effect of different capping environments on the optical properties of CdS nanoparticles in reverse micelles. Int J Quant Chem 72:439–450

    Article  CAS  Google Scholar 

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Acknowledgments

The financial support provided by the Department of Physics and Astronomy and the College of Natural Science and Mathematics (CNSM), California State University, Long Beach (startup grant), the American Chemical Society, Petroleum Research Fund (ACS PRF) under grant PRF# 50461-UNI10 and from Research Corporation for Science Advancement Award are all gratefully acknowledged.

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Correspondence to Yohannes Abate.

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Nuño, Z., Hessler, B., Heiberg, B. et al. Nanoscale near-field infrared spectroscopic imaging of silica-shell/gold-core and pure silica nanoparticles. J Nanopart Res 14, 766 (2012). https://doi.org/10.1007/s11051-012-0766-z

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  • DOI: https://doi.org/10.1007/s11051-012-0766-z

Keywords

  • Silica-shell
  • Scattering-type scanning near-field optical microscopy (s-SNOM)
  • Coating layers
  • Core–shell nanoparticles
  • Near-field infrared imaging