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Search for "plasmon resonance" in Full Text gives 211 result(s) in Beilstein Journal of Nanotechnology. Showing first 200.

Controlled graphene oxide assembly on silver nanocube monolayers for SERS detection: dependence on nanocube packing procedure

  • Martina Banchelli,
  • Bruno Tiribilli,
  • Roberto Pini,
  • Luigi Dei,
  • Paolo Matteini and
  • Gabriella Caminati

Beilstein J. Nanotechnol. 2016, 7, 9–21, doi:10.3762/bjnano.7.2

Graphical Abstract
  • molecules to large proteins by means of surface-enhanced Raman spectroscopy (SERS) [8][9]. Furthermore, these arrays offer additional sensing capabilities based on the localized surface plasmon resonance (LSPR) sensitivity to subtle changes in the refractive index of the surrounding molecular environment
  • new peak at 412 nm and a broader signal centred at 640 nm; similar spectral features were already reported for metal nanoparticles on dielectric support [31][43]. These experimental and theoretical studies demonstrate that the degeneracy of the localized surface plasmon resonance (LSPR) mode is split
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Published 06 Jan 2016

Chemiresistive/SERS dual sensor based on densely packed gold nanoparticles

  • Sanda Boca,
  • Cosmin Leordean,
  • Simion Astilean and
  • Cosmin Farcau

Beilstein J. Nanotechnol. 2015, 6, 2498–2503, doi:10.3762/bjnano.6.259

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  • plasmon resonance, surface-enhanced fluorescence or surface-enhanced Raman spectroscopy (SERS) [2][3]. Among these analytical techniques, SERS is particularly interesting because it can specifically identify the analyte by the unique vibrational signature of chemical groups. Another class of promising
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Published 29 Dec 2015

Surface-enhanced Raman scattering by colloidal CdSe nanocrystal submonolayers fabricated by the Langmuir–Blodgett technique

  • Alexander G. Milekhin,
  • Larisa L. Sveshnikova,
  • Tatyana A. Duda,
  • Ekaterina E. Rodyakina,
  • Volodymyr M. Dzhagan,
  • Ovidiu D. Gordan,
  • Sergey L. Veber,
  • Cameliu Himcinschi,
  • Alexander V. Latyshev and
  • Dietrich R. T. Zahn

Beilstein J. Nanotechnol. 2015, 6, 2388–2395, doi:10.3762/bjnano.6.245

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  • deposited NCs was less than one monolayer, as determined by transmission and scanning electron microscopy. SERS by optical phonons in CdSe nanocrystals showed a significant enhancement that depends resonantly on the Au nanocluster and dimer size, and thus on the localized surface plasmon resonance (LSPR
  • ; localized surface plasmon resonance; metal nanoclusters; phonons; surface-enhanced Raman spectroscopy; Introduction Since its observation in 1974 [1], surface-enhanced Raman scattering (SERS) has become a powerful technique for detecting and studying ultra-low quantities of organic and biological
  • rough metal surfaces. The locally enhanced electromagnetic field induced by the localized surface plasmon resonance (LSPR) in the vicinity of metal surface is responsible for the Raman scattering intensity enhancement, which is proportional to the fourth power of the enhancement of the local field [3][4
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Published 14 Dec 2015

Green and energy-efficient methods for the production of metallic nanoparticles

  • Mitra Naghdi,
  • Mehrdad Taheran,
  • Satinder K. Brar,
  • M. Verma,
  • R. Y. Surampalli and
  • J. R. Valero

Beilstein J. Nanotechnol. 2015, 6, 2354–2376, doi:10.3762/bjnano.6.243

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  • range of 40–200 nm [86]. Also, Wei et al. used CTS in aqueous solution of AgNO3 and HAuCl4 to act as reducing agent and scaffold for the formation of Au and Ag NPs. They used surface plasmon resonance (SPR) analysis to confirm the formation of NPs [29]. In related reports, they used TEM analysis and
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Published 10 Dec 2015

Self-organization of gold nanoparticles on silanated surfaces

  • Htet H. Kyaw,
  • Salim H. Al-Harthi,
  • Azzouz Sellai and
  • Joydeep Dutta

Beilstein J. Nanotechnol. 2015, 6, 2345–2353, doi:10.3762/bjnano.6.242

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  • are fundamentally important and also can be applied for designing and modelling of surface plasmon resonance based sensor applications. Keywords: 3-aminopropyletriethoxysilane; electrostatic interaction; functionalization; gold nanoparticles; self-assembled monolayer; self-organization; Introduction
  • structures [8]. AuNPs have been studied intensively for a wide range of applications such as catalysis [9], biosensing [10], colorimetric sensing [11], optical sensing (surface plasmon resonance (SPR) and surface-enhanced Raman scattering (SERS)) [12][13], photonics [13][14], photovoltaic devices [15] and
  • photothermal therapy [16]. AuNPs exhibit well-defined optical properties such as surface plasmon resonance, which depends on the size and shape of nanoparticles, interparticle distance and the effective refractive index of the surrounding medium [17]. Different techniques have been used to assemble AuNPs on
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Published 10 Dec 2015

Orthogonal chemical functionalization of patterned gold on silica surfaces

  • Francisco Palazon,
  • Didier Léonard,
  • Thierry Le Mogne,
  • Francesca Zuttion,
  • Céline Chevalier,
  • Magali Phaner-Goutorbe,
  • Éliane Souteyrand,
  • Yann Chevolot and
  • Jean-Pierre Cloarec

Beilstein J. Nanotechnol. 2015, 6, 2272–2277, doi:10.3762/bjnano.6.233

Graphical Abstract
  • with the development of localized surface plasmon resonance (LSPR) biosensors, this topic has become a major focus [2][3][4][5][6][7][8]. Indeed, LSPR transduction is expected to yield enhanced signal as compared to classical SPR transduction. However, the enhancement of the LSPR limit of detection is
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Published 01 Dec 2015

Au nanoparticle-based sensor for apomorphine detection in plasma

  • Chiara Zanchi,
  • Andrea Lucotti,
  • Matteo Tommasini,
  • Sebastiano Trusso,
  • Ugo de Grazia,
  • Emilio Ciusani and
  • Paolo M. Ossi

Beilstein J. Nanotechnol. 2015, 6, 2224–2232, doi:10.3762/bjnano.6.228

Graphical Abstract
  • frequency and width of the plasmon resonance, that can be tailored exploring wide intervals [26]. This makes them suitable for use as substrates for SERS, and in particular, to detect exiguous amounts of analyte with low-intensity Raman signatures or that are hindered by competitive fluorescence. A thorough
  •  1A show typical average sizes of such inter-island channels. SERS hinges on the strong interaction between noble metal NPs and visible light through the resonant collective excitation of NP conduction electrons. The resulting surface plasmon resonance peak [28] displays a maximum at about 780 nm
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Published 26 Nov 2015

Conformational switching of ethano-bridged Cu,H2-bis-porphyrin induced by aromatic amines

  • Simona Bettini,
  • Emanuela Maglie,
  • Rosanna Pagano,
  • Victor Borovkov,
  • Yoshihisa Inoue,
  • Ludovico Valli and
  • Gabriele Giancane

Beilstein J. Nanotechnol. 2015, 6, 2154–2160, doi:10.3762/bjnano.6.221

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  • bis-porphyrin derivative. The Langmuir–Schaefer technique has been used to transfer the floating bis-porphyrin film (when using pure water as a subphase) to a surface plasmon resonance (SPR) substrate and the resulting device was able to detect the presence of aniline at concentrations as low as 1 nM
  • were deposited on the SPR slide, and the shift of the SPR angle induced by the injection of amine aqueous solutions at different concentrations was monitored. The effect of aniline on the plasmon resonance of the Cu,H2-Por2 film could be detected when only 1 nM of analyte was fluxed over the active
  • -logarithmic trend was proposed [22][23][24]. The recovery of the SPR device was investigated. The initial plasmon resonance angle was obtained when the Cu,H2-Por2 LS film, previously exposed to aniline, was treated for 15 min at 50 °C and then washed with a flow of ultrapure water for 5 min. The response of
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Published 17 Nov 2015

Possibilities and limitations of advanced transmission electron microscopy for carbon-based nanomaterials

  • Xiaoxing Ke,
  • Carla Bittencourt and
  • Gustaaf Van Tendeloo

Beilstein J. Nanotechnol. 2015, 6, 1541–1557, doi:10.3762/bjnano.6.158

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  • defect, as imaged by STEM, can act as an atomic antenna in the frequency range of petahertz, and thus enhance the surface plasmon resonance locally. However, more recently, Nelson et al., after extracting the dielectric function from STEM–EELS spectra and comparing it with the calculated results [103
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Published 16 Jul 2015

Formation of substrate-based gold nanocage chains through dealloying with nitric acid

  • Ziren Yan,
  • Ying Wu and
  • Junwei Di

Beilstein J. Nanotechnol. 2015, 6, 1362–1368, doi:10.3762/bjnano.6.140

Graphical Abstract
  • to their solid counterparts because of the high surface area, low density, and near-infrared localized surface plasmon resonance (LSPR). All these make Au NC an attractive material for various applications in optical [4][5] and electrochemical sensing [6], immunoassay [7], drug release [8], surface
  • solution on a copper grid. X-ray diffraction (XRD) analysis was performed by X’Pert-Pro MPD (Panalytical, Holland). The localized surface plasmon resonance (LSPR) spectra of nanoparticles were measured with a Shimadzu UV–vis–NIR 3600 Spectrophotometer against a bare ITO slide as the reference. SEM images
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Published 18 Jun 2015

Synthesis, characterization and in vitro effects of 7 nm alloyed silver–gold nanoparticles

  • Simon Ristig,
  • Svitlana Chernousova,
  • Wolfgang Meyer-Zaika and
  • Matthias Epple

Beilstein J. Nanotechnol. 2015, 6, 1212–1220, doi:10.3762/bjnano.6.124

Graphical Abstract
  • resonance peak shows one maximum due to the distribution of the metals throughout the whole particle. Core–shell nanoparticles or individual silver or gold nanoparticles show two distinct plasmon resonance peaks [21][36][37]. As it is depicted in Figure 3, the absorption spectra show only one narrow peak
  • plasmon resonance spectra against the molar fraction of Au or Ag. For a given particle size and surface functionalization, a linear relationship would indicate a macroscopically homogeneous distribution of the metals in the nanoparticles [21]. In Figure 4, the absorption maxima of the ≈10 nm nanoparticles
  • values were close to the theoretical compositions (Table 2). To confirm the alloying of the two metals, UV–vis spectra were recorded for all samples. From the spectra it is possible to gain information about the inner structure of the nanoparticles. In case of alloyed Ag/Au nanoparticles, the plasmon
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Published 27 May 2015

Improved optical limiting performance of laser-ablation-generated metal nanoparticles due to silica-microsphere-induced local field enhancement

  • Zheren Du,
  • Lianwei Chen,
  • Tsung-Sheng Kao,
  • Mengxue Wu and
  • Minghui Hong

Beilstein J. Nanotechnol. 2015, 6, 1199–1204, doi:10.3762/bjnano.6.122

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  • nanoparticles exhibit localized surface plasmon resonance (LSPR), which is another possible way for local field enhancement to influence the light absorption and scattering [25]. Conclusion In this paper, we have studied that LAL is a promising technique to generate nanoparticles for various target materials
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Published 22 May 2015

Superluminescence from an optically pumped molecular tunneling junction by injection of plasmon induced hot electrons

  • Kai Braun,
  • Xiao Wang,
  • Andreas M. Kern,
  • Hilmar Adler,
  • Heiko Peisert,
  • Thomas Chassé,
  • Dai Zhang and
  • Alfred J. Meixner

Beilstein J. Nanotechnol. 2015, 6, 1100–1106, doi:10.3762/bjnano.6.111

Graphical Abstract
  • power, PIL < 25%, a high-gain regime for 25% < PIL < 75% and almost saturates for PIL > 75%. The intensity in the low-gain regime consists mainly of the luminescence from the plasmon resonance of the Au/Au-junction and the spectrum has a full width at half maximum of about 90 nm with very weak
  • scattered to the far field. While the gap modes plasmon resonance is very broad, exhibiting a quality factor of only Q ≈ 15, the resonantly stored energy in the optical near field in the gap is extremely well localized, in a volume having an upper limit of approximately 4 × 4 × 1 nm3 (see Figure S8
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Published 04 May 2015

Patterning technique for gold nanoparticles on substrates using a focused electron beam

  • Takahiro Noriki,
  • Shogo Abe,
  • Kotaro Kajikawa and
  • Masayuki Shimojo

Beilstein J. Nanotechnol. 2015, 6, 1010–1015, doi:10.3762/bjnano.6.104

Graphical Abstract
  • plasmon resonance (LSPR) are attracting attention for future optical transmission, sensor, and data processing devices. The development of these LSPR-based structures would lead to a reduction in the size of optical circuits and devices [1][2]. Light energy can be propagated through nanometer-sized wires
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Published 22 Apr 2015

Protein corona – from molecular adsorption to physiological complexity

  • Lennart Treuel,
  • Dominic Docter,
  • Michael Maskos and
  • Roland H. Stauber

Beilstein J. Nanotechnol. 2015, 6, 857–873, doi:10.3762/bjnano.6.88

Graphical Abstract
  • adsorption such as isothermal titration calorimetry (ITC) [82][83], and surface plasmon resonance (SPR) [22][84]. Moreover, techniques based on the size of proteins and protein–NP complexes have been utilized such as size-exclusion chromatography (SEC) [85][86][87][88][89][90] or one- and two-dimensional
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Published 30 Mar 2015

Combination of surface- and interference-enhanced Raman scattering by CuS nanocrystals on nanopatterned Au structures

  • Alexander G. Milekhin,
  • Nikolay A. Yeryukov,
  • Larisa L. Sveshnikova,
  • Tatyana A. Duda,
  • Ekaterina E. Rodyakina,
  • Victor A. Gridchin,
  • Evgeniya S. Sheremet and
  • Dietrich R. T. Zahn

Beilstein J. Nanotechnol. 2015, 6, 749–754, doi:10.3762/bjnano.6.77

Graphical Abstract
  • surface plasmon resonance energy enabling resonance SERS in absorbates deposited on the arrays [13][14][15][16][17]. Moreover, CuS NCs are resistant against intense laser excitation even under resonant conditions. This is important for micro-Raman experiments with the NCs on nanostructured Au arrays under
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Published 17 Mar 2015

Electromagnetic enhancement of ordered silver nanorod arrays evaluated by discrete dipole approximation

  • Guoke Wei,
  • Jinliang Wang and
  • Yu Chen

Beilstein J. Nanotechnol. 2015, 6, 686–696, doi:10.3762/bjnano.6.69

Graphical Abstract
  • under the s-polarized and the p-polarized excitations are also depicted in Figure 2, in which the propagation direction of the light is perpendicular to the long axis of the nanorod. A major plasmon resonance peak centred at 360 nm is found under the excitation of s-polarization, along with a broad
  • shows a similar trend against AR as EFavg does. Effect of the excitation wavelength Since the SERS effect is a near-field phenomenon and related to the localized surface plasmon resonance (LSPR) of the nanostructures, it is expected to exhibit a behavior that depends on the excitation wavelength. Here
  • the vertical AgNR arrays. It has been revealed that different modes of surface plasmon resonance can only be excited by certain angles of incidence, leading to different near-field enhancements [23][33]. Effect of incident polarization Figure 9a shows the polarization dependence of EFavg from S42 AgNR
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Published 09 Mar 2015

Influence of gold, silver and gold–silver alloy nanoparticles on germ cell function and embryo development

  • Ulrike Taylor,
  • Daniela Tiedemann,
  • Christoph Rehbock,
  • Wilfried A. Kues,
  • Stephan Barcikowski and
  • Detlef Rath

Beilstein J. Nanotechnol. 2015, 6, 651–664, doi:10.3762/bjnano.6.66

Graphical Abstract
  • nanotoxicology on reproductive cells provides an ideal tool. Schematic representation of experiments conducted within the collaboration project REPROTOX. (A) Exemplary AuAg colloids with different molar fractions. (B) Correlation of gold molar fraction with the maximum surface plasmon resonance extinction peak
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Published 05 Mar 2015

Synergic combination of the sol–gel method with dip coating for plasmonic devices

  • Cristiana Figus,
  • Maddalena Patrini,
  • Francesco Floris,
  • Lucia Fornasari,
  • Paola Pellacani,
  • Gerardo Marchesini,
  • Andrea Valsesia,
  • Flavia Artizzu,
  • Daniela Marongiu,
  • Michele Saba,
  • Franco Marabelli,
  • Andrea Mura,
  • Giovanni Bongiovanni and
  • Francesco Quochi

Beilstein J. Nanotechnol. 2015, 6, 500–507, doi:10.3762/bjnano.6.52

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  • an extended time and inducing a suitable reduction of the regeneration time of the chip. Keywords: biosensors; nanodevices; plasmonics; sol–gel; thin films; Introduction Plasmonic nanostructures have gained increasing attention for their surface plasmon resonance (SPR)-related properties, which can
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Published 19 Feb 2015

Hollow plasmonic antennas for broadband SERS spectroscopy

  • Gabriele C. Messina,
  • Mario Malerba,
  • Pierfrancesco Zilio,
  • Ermanno Miele,
  • Michele Dipalo,
  • Lorenzo Ferrara and
  • Francesco De Angelis

Beilstein J. Nanotechnol. 2015, 6, 492–498, doi:10.3762/bjnano.6.50

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  • based on surface enhanced Raman scattering (SERS) enhancement [1][2][3], fluorescence [4][5], the surface plasmon resonance effect [6][7], mapping and imaging [8][9][10], to nanotechnology, with several works related to nanolithography [11][12], nanofocusing [13][14], nanolasers [15][16], waveguides [17
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Published 18 Feb 2015

Raman spectroscopy as a tool to investigate the structure and electronic properties of carbon-atom wires

  • Alberto Milani,
  • Matteo Tommasini,
  • Valeria Russo,
  • Andrea Li Bassi,
  • Andrea Lucotti,
  • Franco Cataldo and
  • Carlo S. Casari

Beilstein J. Nanotechnol. 2015, 6, 480–491, doi:10.3762/bjnano.6.49

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  • from NIR (1064 nm) to blue (458 nm) wavelengths, illustrating that this is not a resonance-activated effect [39]. When interacting with metal nanoparticles in solution, H-terminated polyynes promote colloid aggregation, which causes the plasmon resonance to broaden and shift from the visible to the NIR
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Published 17 Feb 2015

Palladium nanoparticles anchored to anatase TiO2 for enhanced surface plasmon resonance-stimulated, visible-light-driven photocatalytic activity

  • Kah Hon Leong,
  • Hong Ye Chu,
  • Shaliza Ibrahim and
  • Pichiah Saravanan

Beilstein J. Nanotechnol. 2015, 6, 428–437, doi:10.3762/bjnano.6.43

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  • with controlled Pd NPs size ranging between 17 and 29 nm onto the surface of TiO2. Thus, it gives the characteristic for Pd NPs to absorb light in the visible region obtained through localized surface plasmon resonance (LSPRs). Apparently, the photocatalytic activity of the prepared photocatalysts was
  • most promising strategy to defeat the limitations of TiO2. This is due to the characteristics of noble metals, which can drastically enhance the absorption of visible light through localized surface plasmon resonance effects (LSPRs) [23][24]. The LSPR absorption in noble metal NPs arise from the
  • efficiency was achieved by depositing Pd NPs on the surface of TiO2. This immense progress was attributed to the localized surface plasmon resonance that enables Pd NPs to absorb light in the visible region. This is attributed to an optical excitation that produces a coherent oscillation of free electrons in
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Published 11 Feb 2015

Influence of size, shape and core–shell interface on surface plasmon resonance in Ag and Ag@MgO nanoparticle films deposited on Si/SiOx

  • Sergio D’Addato,
  • Daniele Pinotti,
  • Maria Chiara Spadaro,
  • Guido Paolicelli,
  • Vincenzo Grillo,
  • Sergio Valeri,
  • Luca Pasquali,
  • Luca Bergamini and
  • Stefano Corni

Beilstein J. Nanotechnol. 2015, 6, 404–413, doi:10.3762/bjnano.6.40

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  • atmosphere gave rise to formation of a MgO shell matrix surrounding the Ag NPs. The behaviour of the surface plasmon resonance (SPR) excitation in surface differential reflectivity (SDR) spectra with p-polarised light was investigated for bare Ag and Ag@MgO NPs. It was shown that the presence of MgO around
  • ; surface differential reflectivity; surface plasmon resonance; Introduction Nanoparticles (NPs) deposited on surfaces constitute a vast and important research field in material science having many applications in magnetic recording [1][2], catalysis [3], and photovoltaics [4][5][6][7][8][9]. For instance
  • , it was found that Au NPs [5] and Ag NPs [6] deposited on thin film- and wafer-based Si solar cells can enhance their photon absorption due to the occurrence of surface plasmon resonance (SPR), which serves to scatter the incident radiation in the UV–vis region and to increase the light trapping
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Published 09 Feb 2015

Green preparation and spectroscopic characterization of plasmonic silver nanoparticles using fruits as reducing agents

  • Jes Ærøe Hyllested,
  • Marta Espina Palanco,
  • Nicolai Hagen,
  • Klaus Bo Mogensen and
  • Katrin Kneipp

Beilstein J. Nanotechnol. 2015, 6, 293–299, doi:10.3762/bjnano.6.27

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  • relatively simple way by using extracts of oranges and pineapples as reducing agents. Size and shape of the particles depend mainly on the kind of fruit used in the chemical preparation process. The UV–vis absorption spectrum displays the surface plasmon resonance and also features in the UV, which can be
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Published 26 Jan 2015

Mechanical properties of MDCK II cells exposed to gold nanorods

  • Anna Pietuch,
  • Bastian Rouven Brückner,
  • David Schneider,
  • Marco Tarantola,
  • Christina Rosman,
  • Carsten Sönnichsen and
  • Andreas Janshoff

Beilstein J. Nanotechnol. 2015, 6, 223–231, doi:10.3762/bjnano.6.21

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  • monolayer after incubation with CTAB-coated gold nanorods at different concentrations. Particles as well as aggregates are easily discernible due to their plasmon resonance. The particles arrange predominantly around the nucleus but are usually not found inside the nucleus. Recently, we carried out optical
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Published 20 Jan 2015
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