Surface-Enhanced Infrared Absorption by Optical Phonons in Nanocrystal Monolayers on Au Nanoantenna Arrays

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Surface-Enhanced Infrared Absorption by Optical Phonons in Nanocrystal Monolayers on Au Nanoantenna Arrays. / Milekhin, A. G.; Kuznetsov, Sergei A.; Sveshnikova, L. L. et al.

In: Journal of Physical Chemistry C, Vol. 121, No. 10, 16.03.2017, p. 5779-5786.

Research output: Contribution to journal › Article › peer-review

BibTeX

@article{c3d0102731c64722956293b31eb1e24b,

title = "Surface-Enhanced Infrared Absorption by Optical Phonons in Nanocrystal Monolayers on Au Nanoantenna Arrays",

abstract = "We report on a study of surface-enhanced infrared absorption (SEIRA) by optical phonons in monolayers (MLs) of CdSe, CdS, and PbS nanocrystals (NCs) deposited on arrays of linear nanoantennas the optimized structural parameters of which allow coupling between the localized surface plasmon resonance (LSPR) and diffraction modes in the far-infrared spectral region. The Langmuir-Blodgett technique was used for homogeneous deposition of the NCs. The structural parameters of the arrays and the NC MLs were determined by scanning electron microscopy. According to the three-dimensional electrodynamic simulations of the electromagnetic field distribution around the antennas, the maximal SEIRA enhancement is realized for an array period of about 15 μm when the energy of a diffraction mode coincides with that of the LSPR mode. SEIRA experimental results are in perfect quantitative agreement with the simulation. The maximal SEIRA enhancement is observed for the nanoantenna length and transverse periodicity predicted by the simulations. The frequency positions of the absorption features indicate that only the NC surface optical phonons are activated in the SEIRA spectra. (Graph Presented).",

keywords = "RESONANT RAMAN-SCATTERING, QUANTUM DOTS, SEMICONDUCTOR NANOCRYSTAL, VIBRATIONAL-MODES, SPECTROSCOPY, AG, NANOSTRUCTURES, PB",

author = "Milekhin, {A. G.} and Kuznetsov, {Sergei A.} and Sveshnikova, {L. L.} and Duda, {T. A.} and Milekhin, {I. A.} and Rodyakina, {E. E.} and Latyshev, {A. V.} and Dzhagan, {V. M.} and Zahn, {D. R.T.}",

note = "Publisher Copyright: {\textcopyright} 2017 American Chemical Society.",

year = "2017",

month = mar,

day = "16",

doi = "10.1021/acs.jpcc.6b11431",

language = "English",

volume = "121",

pages = "5779--5786",

journal = "Journal of Physical Chemistry C",

issn = "1932-7447",

publisher = "American Chemical Society",

number = "10",

}

RIS

TY - JOUR

T1 - Surface-Enhanced Infrared Absorption by Optical Phonons in Nanocrystal Monolayers on Au Nanoantenna Arrays

AU - Milekhin, A. G.

AU - Kuznetsov, Sergei A.

AU - Sveshnikova, L. L.

AU - Duda, T. A.

AU - Milekhin, I. A.

AU - Rodyakina, E. E.

AU - Latyshev, A. V.

AU - Dzhagan, V. M.

AU - Zahn, D. R.T.

PY - 2017/3/16

Y1 - 2017/3/16

N2 - We report on a study of surface-enhanced infrared absorption (SEIRA) by optical phonons in monolayers (MLs) of CdSe, CdS, and PbS nanocrystals (NCs) deposited on arrays of linear nanoantennas the optimized structural parameters of which allow coupling between the localized surface plasmon resonance (LSPR) and diffraction modes in the far-infrared spectral region. The Langmuir-Blodgett technique was used for homogeneous deposition of the NCs. The structural parameters of the arrays and the NC MLs were determined by scanning electron microscopy. According to the three-dimensional electrodynamic simulations of the electromagnetic field distribution around the antennas, the maximal SEIRA enhancement is realized for an array period of about 15 μm when the energy of a diffraction mode coincides with that of the LSPR mode. SEIRA experimental results are in perfect quantitative agreement with the simulation. The maximal SEIRA enhancement is observed for the nanoantenna length and transverse periodicity predicted by the simulations. The frequency positions of the absorption features indicate that only the NC surface optical phonons are activated in the SEIRA spectra. (Graph Presented).

AB - We report on a study of surface-enhanced infrared absorption (SEIRA) by optical phonons in monolayers (MLs) of CdSe, CdS, and PbS nanocrystals (NCs) deposited on arrays of linear nanoantennas the optimized structural parameters of which allow coupling between the localized surface plasmon resonance (LSPR) and diffraction modes in the far-infrared spectral region. The Langmuir-Blodgett technique was used for homogeneous deposition of the NCs. The structural parameters of the arrays and the NC MLs were determined by scanning electron microscopy. According to the three-dimensional electrodynamic simulations of the electromagnetic field distribution around the antennas, the maximal SEIRA enhancement is realized for an array period of about 15 μm when the energy of a diffraction mode coincides with that of the LSPR mode. SEIRA experimental results are in perfect quantitative agreement with the simulation. The maximal SEIRA enhancement is observed for the nanoantenna length and transverse periodicity predicted by the simulations. The frequency positions of the absorption features indicate that only the NC surface optical phonons are activated in the SEIRA spectra. (Graph Presented).

KW - RESONANT RAMAN-SCATTERING

KW - QUANTUM DOTS

KW - SEMICONDUCTOR NANOCRYSTAL

KW - VIBRATIONAL-MODES

KW - SPECTROSCOPY

KW - AG

KW - NANOSTRUCTURES

KW - PB

UR - http://www.scopus.com/inward/record.url?scp=85018187602&partnerID=8YFLogxK

U2 - 10.1021/acs.jpcc.6b11431

DO - 10.1021/acs.jpcc.6b11431

M3 - Article

AN - SCOPUS:85018187602

VL - 121

SP - 5779

EP - 5786

JO - Journal of Physical Chemistry C

JF - Journal of Physical Chemistry C

SN - 1932-7447

IS - 10

ER -

ID: 8679160