Nanoantenna-assisted plasmonic enhancement of IR absorption of vibrational modes of organic molecules

Milekhin, A. G.; Черкасова, О. П.; Kuznetsov, S. А.; Milekhin, Ilya; Rodyakina, Ekatherina E; Латышев, А. В.; Banerjee, Shaibal; Salvan, Georgeta; Zahn, Dietrich R. T.

doi:10.3762/bjnano.8.99

Cited by 10 publications

(6 citation statements)

References 43 publications

(51 reference statements)

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“…recognition of sugars [9] and steroid hormones [10]. We used such a technique for the detection of the cortisol hormone in human blood plasmas [11,12].…”

Section: Introductionmentioning

confidence: 99%

“…The considered NA sensors have linear geometry and are designed for the resonant frequencies of 1.337 and 1.695 THz corresponding to L-2HG and D-2HG isomers, respectively. Complete work with a description of the experimental implementation for these sensors using E-beam lithography [11,18,19] and their further characterization with a manufactured-in-house THz-TDS system [17] will be published elsewhere.…”

Section: Introductionmentioning

confidence: 99%

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Terahertz technology in diagnosis of glioma molecular markers

Kuznetsov

Konnikova

Heinz

et al. 2022

J. Phys.: Conf. Ser.

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Gliomas are invasive brain tumors with high rates of recurrence and mortality. It has been shown that specific markers for glioma’s differential diagnostics are enantiomers of 2-hydroxyglutarate (L-2HG and D-2HG) in brain tissues and blood. These isomers have unique absorption peaks originating from vibrational and rotational transitions in their molecules. In particular, the peaks centered at 1.337 THz and 1.695 THz correspond to L-2HG and D-2HG isomers, respectively. The goal of this work is to develop highly efficient frequency-selective sensors for L-2HG and D-2HG isomers using the effect of nanoantenna-assisted plasmonic enhancement of THz absorption. Such an approach provides a noticeable increase in detection sensitivity versus direct non-resonant methods. In this paper, we present the numerical results of the design optimization for L-2HG and D-2HG sensors based on Si/SiO2-wafer-backed arrays of golden nanoantennas of linear geometry. The optimal structural parameters of the arrays found through integral averaging of the square of the surface electric field over an array unit cell are recommended for further nanolithographic fabrication of this kind of THz sensor.

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“…recognition of sugars [9] and steroid hormones [10]. We used such a technique for the detection of the cortisol hormone in human blood plasmas [11,12].…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Terahertz technology in diagnosis of glioma molecular markers

Kuznetsov

Konnikova

Heinz

et al. 2022

J. Phys.: Conf. Ser.

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“…The SEIRA enhancement induced by the nanoantennas was estimated to be as high as 1 × 10 6 . In our earlier papers we demonstrated SEIRA in the mid- and far-infrared for both organic molecules and inorganic NCs deposited on Au linear nanoantenna arrays fabricated on Si substrates by nanolithography [ 22 – 23 ]. The influence of a thin SiO 2 layer (0–100 nm) beneath the nanoantenna arrays on the LSPR energy, as well as the LSP penetration depth into SiO 2 were established [ 12 ].…”

Section: Introductionmentioning

confidence: 99%

Nanoantenna structures for the detection of phonons in nanocrystals

Milekhin

Kuznetsov

Milekhin

et al. 2018

Beilstein J. Nanotechnol.

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We report a study of the infrared response by localized surface plasmon resonance (LSPR) modes in gold micro- and nanoantenna arrays with various morphologies and surface-enhanced infrared absorption (SEIRA) by optical phonons of semiconductor nanocrystals (NCs) deposited on the arrays. The arrays of nano- and microantennas fabricated with nano- and photolithography reveal infrared-active LSPR modes of energy ranging from the mid to far-infrared that allow the IR response from very low concentrations of organic and inorganic materials deposited onto the arrays to be analyzed. The Langmuir–Blodgett technology was used for homogeneous deposition of CdSe, CdS, and PbS NC monolayers on the antenna arrays. The structural parameters of the arrays were confirmed by scanning electron microscopy. 3D full-wave electromagnetic simulations of the electromagnetic field distribution around the micro- and nanoantennas were employed to realize the maximal SEIRA enhancement for structural parameters of the arrays whereby the LSPR and the NC optical phonon energies coincide. The SEIRA experiments quantitatively confirmed the computational results. The maximum SEIRA enhancement was observed for linear nanoantennas with optimized structural parameters determined from the electromagnetic simulations. The frequency position of the feature’s absorption seen in the SEIRA response evidences that the NC surface and transverse optical phonons are activated in the infrared spectra.

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“…One of the most promising directions has been surface-based nanoplasmonic sensors, and the potential of such technologies is still emerging. [19][20][21] To date, there have been no reports about GONR catalytic gold nanoplasmon RRS/absorption (Abs) analytical platform for human chorionic gonadotropin (hCG), based on peptide reaction-modulating nanoenzyme activity, without preparation of nanoprobes and nanoparticle aggregation.…”

mentioning

confidence: 99%

A facile and sensitive peptide-modulating graphene oxide nanoribbon catalytic nanoplasmon analytical platform for human chorionic gonadotropin

Liang

et al. 2017

IJN

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The nanogold reaction between HAuCl 4 and citrate is very slow, and the catalyst graphene oxide nanoribbon (GONR) enhanced the nanoreaction greatly to produce gold nanoparticles (AuNPs) that exhibited strong surface plasmon resonance (SPR) absorption (Abs) at 550 nm and resonance Rayleigh scattering (RRS) at 550 nm. Upon addition of the peptide of human chorionic gonadotropin (hCG), the peptide could adsorb on the GONR surface, which inhibited the catalysis. When hCG was added, peptides were separated from the GONR surface due to the formation of stable peptide–hCG complex, which led to the activation of GONR catalytic effect. With the increase in hCG concentration, the RRS and Abs signal enhanced linearly. The enhanced RRS value showed a good linear relationship with hCG concentration in the range of 0.2–20 ng/mL, with a detection limit of 70 pg/mL. Accordingly, two new GONR catalytic RRS/Abs methods were established for detecting hCG in serum samples.

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Nanoantenna-assisted plasmonic enhancement of IR absorption of vibrational modes of organic molecules

Cited by 10 publications

References 43 publications

Terahertz technology in diagnosis of glioma molecular markers

Terahertz technology in diagnosis of glioma molecular markers

Nanoantenna structures for the detection of phonons in nanocrystals

A facile and sensitive peptide-modulating graphene oxide nanoribbon catalytic nanoplasmon analytical platform for human chorionic gonadotropin

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