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Search for "optical spectroscopy" in Full Text gives 40 result(s) in Beilstein Journal of Nanotechnology.

Facile synthesis of size-tunable L-carnosine-capped silver nanoparticles and their role in metal ion sensing and catalytic degradation of p-nitrophenol

  • Akash Kumar,
  • Ridhima Chadha,
  • Abhishek Das,
  • Nandita Maiti and
  • Rayavarapu Raja Gopal

Beilstein J. Nanotechnol. 2024, 15, 1576–1592, doi:10.3762/bjnano.15.124

Graphical Abstract
  • -carnosine-capped silver nanoparticles. Optical spectroscopy of ʟ-carnosine-capped silver nanoparticles The synthesized silver nanoparticles capped with ʟ-carnosine were assessed regarding their absorption peaks, as illustrated in Figure 2. The sample ʟ-car-AgNP1 exhibited a single absorption peak at 410 nm
  • -AgNP4, ʟ-car-AgNP3, and ʟ-car-AgNP2 are nearly the same, but the lower rate constant in case of AgNP5 might be due to the formation of larger aggregates, which was confirmed by optical spectroscopy and TEM analysis. The high efficiency of AgNP2 might be due to its quasi-spherical shape. The catalytic
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Published 06 Dec 2024

Ultrablack color in velvet ant cuticle

  • Vinicius Marques Lopez,
  • Wencke Krings,
  • Juliana Reis Machado,
  • Stanislav Gorb and
  • Rhainer Guillermo-Ferreira

Beilstein J. Nanotechnol. 2024, 15, 1554–1565, doi:10.3762/bjnano.15.122

Graphical Abstract
  • of the ultrablack cuticle in Traumatomutilla bifurca, an enigmatic and visually striking species of velvet ants (Hymenoptera, Mutillidae). Using a combination of scanning electron microscopy (SEM), transmission electron microscopy (TEM), confocal laser scanning microscopy (CLSM), and optical
  • spectroscopy, we conducted a comprehensive analysis of the cuticle to elucidate its unique optical properties. SEM imaging provided a detailed surface morphology, while TEM provided insights into the internal structure. CLSM showed that the cuticle exhibits no autofluorescence. Our findings reveal a highly
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Published 02 Dec 2024

Nanoarchitectonics with cetrimonium bromide on metal nanoparticles for linker-free detection of toxic metal ions and catalytic degradation of 4-nitrophenol

  • Akash Kumar and
  • Raja Gopal Rayavarapu

Beilstein J. Nanotechnol. 2024, 15, 1312–1332, doi:10.3762/bjnano.15.106

Graphical Abstract
  • TEM analyses Physicochemical characterization was performed using optical spectroscopy, DLS, FTIR, XRD, and TEM analyses. Figure 2a shows the synthesized isotropic silver and gold nanospheres with plasmon bands at 410 nm (AgNS) and 525 nm (AuNS). The anisotropic tunable gold nanorods with longitudinal
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Published 04 Nov 2024

Exploring surface charge dynamics: implications for AFM height measurements in 2D materials

  • Mario Navarro-Rodriguez,
  • Andres M. Somoza and
  • Elisa Palacios-Lidon

Beilstein J. Nanotechnol. 2024, 15, 767–780, doi:10.3762/bjnano.15.64

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  • addition, it can be integrated with classical optical spectroscopy methods such as Raman and fluorescence [20][28][29], enabling a multidimensional characterization approach. A well-recognized issue within the AFM community is the inaccurate height determination derived from topography images on
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Published 01 Jul 2024

Gold nanomakura: nanoarchitectonics and their photothermal response in association with carrageenan hydrogels

  • Nabojit Das,
  • Vikas,
  • Akash Kumar,
  • Sanjeev Soni and
  • Raja Gopal Rayavarapu

Beilstein J. Nanotechnol. 2024, 15, 678–693, doi:10.3762/bjnano.15.56

Graphical Abstract
  • diffraction (XRD), and FTIR, respectively, to establish physicochemical properties of the synthesized nanomaterials. Results Synthesis, optical spectroscopy, and zeta potential Anisotropic gold nanoparticles of makura shape were synthesized using seed-mediated approach as shown in Figure 1a. The Au seeds were
  • results obtained through optical spectroscopy, aspect ratio calculation, FTIR, and XRD measurements clearly indicated the profound effect of carbon tail length on the morphology of AuNMs. The synthesized nanomakuras, due to their intrinsic properties and optical activity close to the NIR region, have the
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Published 07 Jun 2024

Ultrafast signatures of magnetic inhomogeneity in Pd1−xFex (x ≤ 0.08) epitaxial thin films

  • Andrey V. Petrov,
  • Sergey I. Nikitin,
  • Lenar R. Tagirov,
  • Amir I. Gumarov,
  • Igor V. Yanilkin and
  • Roman V. Yusupov

Beilstein J. Nanotechnol. 2022, 13, 836–844, doi:10.3762/bjnano.13.74

Graphical Abstract
  • state in the Pd1−xFex alloy at low temperatures is about 7–8 atom %. Keywords: magnetic inhomogeneities; PdFe alloy; thin epitaxial films; time-resolved magneto-optical Kerr effect; time-resolved optical spectroscopy; Introduction Superconductor-based technologies are promising for exaflop-scale
  • iron at which the alloy would become magnetically homogeneous. This requires a method for detecting magnetic inhomogeneities, preferably with the possibility of being applied to thin films. We propose the use of ultrafast, time-resolved optical and magneto-optical spectroscopy methods for probing
  • -rich PdFe alloys. Conclusion Based on the analysis of the experimental data on ultrafast optical and magneto-optical spectroscopy in comparison with the magnetometry data, responses have been identified inherent to the magnetically inhomogeneous state of the epitaxial Pd1−xFex alloy films. The
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Published 25 Aug 2022

Revealing local structural properties of an atomically thin MoSe2 surface using optical microscopy

  • Lin Pan,
  • Peng Miao,
  • Anke Horneber,
  • Alfred J. Meixner,
  • Pierre-Michel Adam and
  • Dai Zhang

Beilstein J. Nanotechnol. 2022, 13, 572–581, doi:10.3762/bjnano.13.49

Graphical Abstract
  • dichalcogenide. Keywords: copper phthalocyanine; local structure; molybdenum diselenide; optical spectroscopy; surface-enhanced Raman spectroscopy; Introduction Two-dimensional (2D) materials have garnered interest for the next generation of optoelectronic and electrochemical devices, mainly owing to their
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Published 01 Jul 2022

Selective detection of complex gas mixtures using point contacts: concept, method and tools

  • Alexander P. Pospelov,
  • Victor I. Belan,
  • Dmytro O. Harbuz,
  • Volodymyr L. Vakula,
  • Lyudmila V. Kamarchuk,
  • Yuliya V. Volkova and
  • Gennadii V. Kamarchuk

Beilstein J. Nanotechnol. 2020, 11, 1631–1643, doi:10.3762/bjnano.11.146

Graphical Abstract
  • part of the exhaled breath and, as such, can be used as markers for breath characterization. Hence, it is important to detect single components of the exhaled breath for medical purposes. Mass spectrometry, gas chromatography–mass spectrometry, as well as various optical spectroscopy techniques are
  • techniques (e.g., optical spectroscopy). The application of the energy approach to solve practical problems is often limited by the complexity of the systems under study and the lack of simple and reliable tools to measure and analyze processes. The implementation of innovative mechanisms based on the
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Published 28 Oct 2020

Optically and electrically driven nanoantennas

  • Monika Fleischer,
  • Dai Zhang and
  • Alfred J. Meixner

Beilstein J. Nanotechnol. 2020, 11, 1542–1545, doi:10.3762/bjnano.11.136

Graphical Abstract
  • resolution. They enable boosting the intrinsically low optical signal of a very small number of molecules by orders of magnitude with respect to any surrounding molecules, which can be the source of an overwhelming background signal. This principle applies to virtually any kind of optical spectroscopy
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Published 07 Oct 2020

Self-assembly and spectroscopic fingerprints of photoactive pyrenyl tectons on hBN/Cu(111)

  • Domenik M. Zimmermann,
  • Knud Seufert,
  • Luka Ðorđević,
  • Tobias Hoh,
  • Sushobhan Joshi,
  • Tomas Marangoni,
  • Davide Bonifazi and
  • Willi Auwärter

Beilstein J. Nanotechnol. 2020, 11, 1470–1483, doi:10.3762/bjnano.11.130

Graphical Abstract
  • investigations and determination of the molecular gap Both the STS studies addressing the adsorbed species on the single-molecule level and the optical spectroscopy in solution confirmed the gap reduction upon increasing the number of pyridin-4-ylethynyl substituents, as predicted by DFT calculations (Figure 6
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Published 29 Sep 2020

Hybridization vs decoupling: influence of an h-BN interlayer on the physical properties of a lander-type molecule on Ni(111)

  • Maximilian Schaal,
  • Takumi Aihara,
  • Marco Gruenewald,
  • Felix Otto,
  • Jari Domke,
  • Roman Forker,
  • Hiroyuki Yoshida and
  • Torsten Fritz

Beilstein J. Nanotechnol. 2020, 11, 1168–1177, doi:10.3762/bjnano.11.101

Graphical Abstract
  • ). Furthermore, it was possible to obtain large domains of highly ordered molecules by depositing at an elevated substrate temperature of 170 °C. Results and Discussion Optical spectroscopy Figure 1 shows the comparison of the differential reflectance (DR) spectra (definition see Experimental section) of DBP on
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Published 04 Aug 2020

Revealing the local crystallinity of single silicon core–shell nanowires using tip-enhanced Raman spectroscopy

  • Marius van den Berg,
  • Ardeshir Moeinian,
  • Arne Kobald,
  • Yu-Ting Chen,
  • Anke Horneber,
  • Steffen Strehle,
  • Alfred J. Meixner and
  • Dai Zhang

Beilstein J. Nanotechnol. 2020, 11, 1147–1156, doi:10.3762/bjnano.11.99

Graphical Abstract
  • microscopy images. Additionally, the polarizations of Raman scattering and the photoluminescence signal from the tip–sample nanogap are explored by combining polarization angle-resolved emission spectroscopy with tip-enhanced optical spectroscopy. Our work demonstrates the significant potential of resolving
  • emission spectroscopy with tip-enhanced optical spectroscopy. Our work demonstrates the high potential of resolving local structural properties of nanomaterials, here demonstrated for silicon, at the sub-10 nanometer scale using tip-enhanced Raman techniques. TEM investigations are in line with TERS
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Published 31 Jul 2020

Excitonic and electronic transitions in Me–Sb2Se3 structures

  • Nicolae N. Syrbu,
  • Victor V. Zalamai,
  • Ivan G. Stamov and
  • Stepan I. Beril

Beilstein J. Nanotechnol. 2020, 11, 1045–1053, doi:10.3762/bjnano.11.89

Graphical Abstract
  • triselenide; band structure; excitons; optical spectroscopy; reflection and absorption spectra; Introduction Antimony selenide (Sb2Se3) is an inorganic semiconductor compound with interesting photoelectric properties. This material has a high absorption coefficient (≈105 cm−1) in the region of maximum solar
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Published 16 Jul 2020

Highly sensitive detection of estradiol by a SERS sensor based on TiO2 covered with gold nanoparticles

  • Andrea Brognara,
  • Ili F. Mohamad Ali Nasri,
  • Beatrice R. Bricchi,
  • Andrea Li Bassi,
  • Caroline Gauchotte-Lindsay,
  • Matteo Ghidelli and
  • Nathalie Lidgi-Guigui

Beilstein J. Nanotechnol. 2020, 11, 1026–1035, doi:10.3762/bjnano.11.87

Graphical Abstract
  • µM, 100 µM, and 1 mM. Samples were left in the E2 solutions for 1 h before being rinsed with RO water and blown dry. Figure 1 gives a schematic of the final system. Optical and SERS measurements Plasmon resonance was evaluated via optical spectroscopy. For this purpose, transmission spectra were
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Published 14 Jul 2020

Hexagonal boron nitride: a review of the emerging material platform for single-photon sources and the spin–photon interface

  • Stefania Castelletto,
  • Faraz A. Inam,
  • Shin-ichiro Sato and
  • Alberto Boretti

Beilstein J. Nanotechnol. 2020, 11, 740–769, doi:10.3762/bjnano.11.61

Graphical Abstract
  • -luminescence and optical spectroscopy in deep ultraviolet [91][93][94] were used for the characterization of stacking faults and point defects. More recently an aberration-corrected high-resolution transmission electron microscopy technique has been used to resolve atomic defects in a freestanding single layer
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Published 08 May 2020

Deterministic placement of ultra-bright near-infrared color centers in arrays of silicon carbide micropillars

  • Stefania Castelletto,
  • Abdul Salam Al Atem,
  • Faraz Ahmed Inam,
  • Hans Jürgen von Bardeleben,
  • Sophie Hameau,
  • Ahmed Fahad Almutairi,
  • Gérard Guillot,
  • Shin-ichiro Sato,
  • Alberto Boretti and
  • Jean Marie Bluet

Beilstein J. Nanotechnol. 2019, 10, 2383–2395, doi:10.3762/bjnano.10.229

Graphical Abstract
  • samples were fabricated and characterized: Samples 1,2 and 3 (H+ fluence: 1016 cm−2) were not annealed and annealed at 750 and 900 °C, respectively. Sample 4 (H+ fluence: 1013 cm−2) was annealed at 700 °C. A summary of the sample treatments is provided in Table 1. Optical spectroscopy Room-temperature
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Published 05 Dec 2019

Materials nanoarchitectonics at two-dimensional liquid interfaces

  • Katsuhiko Ariga,
  • Michio Matsumoto,
  • Taizo Mori and
  • Lok Kumar Shrestha

Beilstein J. Nanotechnol. 2019, 10, 1559–1587, doi:10.3762/bjnano.10.153

Graphical Abstract
  • confirmed by steady-state optical spectroscopy. Photovoltaic cells with one-dimensional C60 nanorods as active layer sandwiched by an indium tin oxide anode and an aluminium cathode exhibited enhanced photovoltaic capabilities. It also led to a significant enhancement of photogenerated charge carriers as
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Published 30 Jul 2019

Direct observation of the CVD growth of monolayer MoS2 using in situ optical spectroscopy

  • Claudia Beatriz López-Posadas,
  • Yaxu Wei,
  • Wanfu Shen,
  • Daniel Kahr,
  • Michael Hohage and
  • Lidong Sun

Beilstein J. Nanotechnol. 2019, 10, 557–564, doi:10.3762/bjnano.10.57

Graphical Abstract
  • the temperature distribution in the CVD reactor has been revealed. Our results demonstrate the great potential of real time, in situ optical spectroscopy to assist the precisely controlled growth of 2D semiconductor materials. Keywords: chemical vapor deposition (CVD); in situ differential optical
  • molecule adsorption [22][23] as well as strain field [24]. These facts make optical spectroscopy a sensitive probe to monitor the surface kinetics involved during the growth of 2D TMDCs. Furthermore, the optical methods used in the visible range can be applied under various environments including vacuum
  • , atmosphere, and even high pressure conditions. Consequently, optical spectroscopy is the method of choice for in situ studies during CVD growth. Monitoring the evolution of the optical properties of 2D TMDCs during CVD growth may provide a sensitive means to assess the surface processes and to characterize
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Published 26 Feb 2019

Oriented zinc oxide nanorods: A novel saturable absorber for lasers in the near-infrared

  • Pavel Loiko,
  • Tanujjal Bora,
  • Josep Maria Serres,
  • Haohai Yu,
  • Magdalena Aguiló,
  • Francesc Díaz,
  • Uwe Griebner,
  • Valentin Petrov,
  • Xavier Mateos and
  • Joydeep Dutta

Beilstein J. Nanotechnol. 2018, 9, 2730–2740, doi:10.3762/bjnano.9.255

Graphical Abstract
  • seen along with a broad peak centered around 574 cm−1 representing the A1(LO) mode [29]. All samples showed almost identical Raman spectra irrespective of their growth times or sizes. A schematic of the shape of ZnO NRs is shown in Figure 2c where the growth direction is indicated. Linear optical
  • spectroscopy The results on the optical absorption and luminescence of the ZnO NRs are summarized in Figure 3. The small-signal (internal) absorption spectra of the ZnO NRs grown for 5–15 h are shown in Figure 3a. The spectra were corrected for the Fresnel losses arising from the substrate, T(ZnO NRs) = T(ZnO
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Published 23 Oct 2018

Nanoantenna structures for the detection of phonons in nanocrystals

  • Alexander G. Milekhin,
  • Sergei A. Kuznetsov,
  • Ilya A. Milekhin,
  • Larisa L. Sveshnikova,
  • Tatyana A. Duda,
  • Ekaterina E. Rodyakina,
  • Alexander V. Latyshev,
  • Volodymyr M. Dzhagan and
  • Dietrich R. T. Zahn

Beilstein J. Nanotechnol. 2018, 9, 2646–2656, doi:10.3762/bjnano.9.246

Graphical Abstract
  • wavelength – appearing in the visible spectral range and of interest for optical spectroscopy [16]. It was shown that regular linear nanoantennas fabricated by nanolithography demonstrate enhancement of the SEIRA signal from vibrational modes in organic molecules such as octadecanethiol (ODT) [17] and 4,4
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Published 05 Oct 2018

Electro-optical interfacial effects on a graphene/π-conjugated organic semiconductor hybrid system

  • Karolline A. S. Araujo,
  • Luiz A. Cury,
  • Matheus J. S. Matos,
  • Thales F. D. Fernandes,
  • Luiz G. Cançado and
  • Bernardo R. A. Neves

Beilstein J. Nanotechnol. 2018, 9, 963–974, doi:10.3762/bjnano.9.90

Graphical Abstract
  • probe microscopy, optical spectroscopy (photoluminescence and Raman) and ab initio calculations. The graphene/RA interaction induces the formation of a well-organized π-conjugated self-assembled monolayer (SAM) at the interface. Such structural organization leads to the high optical emission efficiency
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Published 23 Mar 2018

Towards molecular spintronics

  • Georgeta Salvan and
  • Dietrich R. T. Zahn

Beilstein J. Nanotechnol. 2017, 8, 2464–2466, doi:10.3762/bjnano.8.245

Graphical Abstract
  • molecules; (magneto-)optical spectroscopy; molecular spintronics; photoelectron spectroscopy; surface science; thin films; The discovery of tunneling and giant magnetoresistance in inorganic spin valves has led to a revolution in the field of magnetic memory and the significant increase in the storage
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Published 21 Nov 2017

Optical techniques for cervical neoplasia detection

  • Tatiana Novikova

Beilstein J. Nanotechnol. 2017, 8, 1844–1862, doi:10.3762/bjnano.8.186

Graphical Abstract
  • endomicroscopy; Mueller polarimetry; nanotheranostics; optical coherence tomography; optical spectroscopy; Raman spectroscopy; Review Introduction Cervical cancer remains one of the major health issues, causing 266000 deaths of women worldwide in 2012 [1]. While the highest incidence rate of cervical cancers
  • neoplasia. The results of these studies as well as current trends to miniaturization of diagnostic instruments will be discussed further. Optical spectroscopy and imaging In vivo diffuse reflectance optical spectroscopy (DRS) exploits the fact that abnormal zones of the cervical epithelium illuminated with
  • different because of their anatomical differences. This effect can also have impact on the diagnostic parameters extracted from the spectroscopic measurements. Using optical spectroscopy as a complementary technique to colposcopy aims to examine the patients with inconclusive Pap test cytological results
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Published 06 Sep 2017

Near-field surface plasmon field enhancement induced by rippled surfaces

  • Mario D’Acunto,
  • Francesco Fuso,
  • Ruggero Micheletto,
  • Makoto Naruse,
  • Francesco Tantussi and
  • Maria Allegrini

Beilstein J. Nanotechnol. 2017, 8, 956–967, doi:10.3762/bjnano.8.97

Graphical Abstract
  • them relative to the sample morphology. SNOM can be subdivided into aperture (or apertureless) scattering-SNOM (s-SNOM). Scattering-type SNOM combines the resolution of atomic force microscopy with the sensitivity of optical spectroscopy. In such a configuration, a sharp metal tip is brought within
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Published 28 Apr 2017

Relationships between chemical structure, mechanical properties and materials processing in nanopatterned organosilicate fins

  • Gheorghe Stan,
  • Richard S. Gates,
  • Qichi Hu,
  • Kevin Kjoller,
  • Craig Prater,
  • Kanwal Jit Singh,
  • Ebony Mays and
  • Sean W. King

Beilstein J. Nanotechnol. 2017, 8, 863–871, doi:10.3762/bjnano.8.88

Graphical Abstract
  • ][23]. However, the Abbe diffraction constraints prohibit direct spatial resolution of light-based spectroscopy techniques, such as infrared (IR) absorption spectroscopy, in the nanometer range [24]. Fortunately, these limitations have been recently overcome via combining optical spectroscopy with
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Published 13 Apr 2017
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