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Search for "light source" in Full Text gives 197 result(s) in Beilstein Journal of Nanotechnology.

CdSe nanorod/TiO2 nanoparticle heterojunctions with enhanced solar- and visible-light photocatalytic activity

  • Fakher Laatar,
  • Hatem Moussa,
  • Halima Alem,
  • Lavinia Balan,
  • Emilien Girot,
  • Ghouti Medjahdi,
  • Hatem Ezzaouia and
  • Raphaël Schneider

Beilstein J. Nanotechnol. 2017, 8, 2741–2752, doi:10.3762/bjnano.8.273

Graphical Abstract
  • simulated solar light source (light intensity = 5 mW/cm2). A polycarbonate filter was added for experiments conducted under visible light irradiation (light intensity = 10 mW/cm2). In a typical experiment, 50 mg of the CdSe/TiO2 composite were dispersed in 50 mL of aqueous solution of RhB (10 mg/L) in a 70
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Published 19 Dec 2017

Patterning of supported gold monolayers via chemical lift-off lithography

  • Liane S. Slaughter,
  • Kevin M. Cheung,
  • Sami Kaappa,
  • Huan H. Cao,
  • Qing Yang,
  • Thomas D. Young,
  • Andrew C. Serino,
  • Sami Malola,
  • Jana M. Olson,
  • Stephan Link,
  • Hannu Häkkinen,
  • Anne M. Andrews and
  • Paul S. Weiss

Beilstein J. Nanotechnol. 2017, 8, 2648–2661, doi:10.3762/bjnano.8.265

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  • followed by incubation of 1 µM AlexaFluor® 488-labeled complementary DNA. Each substrate was positioned on the microscope sample holder such that the PDMS side was facing away from the light source and the rear side (glass side) of the substrate was facing toward the light source. The images were collected
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Published 08 Dec 2017

Enhanced photoelectrochemical water splitting performance using morphology-controlled BiVO4 with W doping

  • Xin Zhao and
  • Zhong Chen

Beilstein J. Nanotechnol. 2017, 8, 2640–2647, doi:10.3762/bjnano.8.264

Graphical Abstract
  • electrode as a reference electrode. The light source for photoelectrochemical water splitting measurement is a solar simulator (HAL-320, Asahi Spectra Co., Ltd.) with a power intensity of 100 mW·cm−2. The photocurrent was measured in a 0.5 M Na2SO4 aqueous solution with a scan rate of 30 mV·s−1. The
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Published 07 Dec 2017

Angstrom-scale flatness using selective nanoscale etching

  • Takashi Yatsui,
  • Hiroshi Saito and
  • Katsuyuki Nobusada

Beilstein J. Nanotechnol. 2017, 8, 2181–2185, doi:10.3762/bjnano.8.217

Graphical Abstract
  • protrusions only. In the solution, a light source with a photon energy of 4.66 eV (higher than the dissociation energy) dissociated the hypochlorous acid and consequently produced Cl radicals [13]. This process is expected to be similar to the etching of glass when Cl2 gas is used. The laser light was
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Published 18 Oct 2017

High-stress study of bioinspired multifunctional PEDOT:PSS/nanoclay nanocomposites using AFM, SEM and numerical simulation

  • Alfredo J. Diaz,
  • Hanaul Noh,
  • Tobias Meier and
  • Santiago D. Solares

Beilstein J. Nanotechnol. 2017, 8, 2069–2082, doi:10.3762/bjnano.8.207

Graphical Abstract
  • cross section. Optical transmittance spectroscopy was performed by using a CCS200 spectrometer connected to a SLS201 light source and a 2-inch integrating sphere (model IS200-4) procured from Thor Labs. (a) Summary of optical characterization. The transmittance for the different samples is plotted
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Published 04 Oct 2017

Optical techniques for cervical neoplasia detection

  • Tatiana Novikova

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

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  • a low-power broadband light source produce different backscattering spectra compared to normal cervical tissue in the visible wavelength range. Such difference in spectra detected by an optical sensor can be used in order to identify neoplastic lesions of the cervical epithelium. DRS is an indirect
  • tissue. This technique makes use of low-coherence interferometry with a near-infrared light source to create two-dimensional images of tissue cross-sections by exploring elastic light scattering from internal tissue microstructures [117]. OCT provides depth-resolved images, where the contrast results
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Published 06 Sep 2017

Surface-enhanced Raman spectroscopy of cell lysates mixed with silver nanoparticles for tumor classification

  • Mohamed Hassoun,
  • Iwan W.Schie,
  • Tatiana Tolstik,
  • Sarmiza E. Stanca,
  • Christoph Krafft and
  • Juergen Popp

Beilstein J. Nanotechnol. 2017, 8, 1183–1190, doi:10.3762/bjnano.8.120

Graphical Abstract
  • white light source. The laser power was fixed at 50 mW with an acquisition time of 5 s. Each batch was lysed and divided into eight to ten samples. 100 µL of the silver nanoparticles were mixed with 100 µL KCl as aggregating agent, and then 100 µL of cell lysate were added to the mixture with a final
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Published 01 Jun 2017

Enhanced catalytic activity without the use of an external light source using microwave-synthesized CuO nanopetals

  • Govinda Lakhotiya,
  • Sonal Bajaj,
  • Arpan Kumar Nayak,
  • Debabrata Pradhan,
  • Pradip Tekade and
  • Abhimanyu Rana

Beilstein J. Nanotechnol. 2017, 8, 1167–1173, doi:10.3762/bjnano.8.118

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  • , University of Twente, 7500 AE, Enschede, Netherlands 10.3762/bjnano.8.118 Abstract We report enhanced catalytic activity of CuO nanopetals synthesized by microwave-assisted wet chemical synthesis. The catalytic reaction of CuO nanopetals and H2O2 was studied with the application of external light source and
  • also under dark conditions for the degradation of the hazardous dye methylene blue. The CuO nanopetals showed significant catalytic activity for the fast degradation of methylene blue and rhodamine B (RhB) under dark conditions, without the application of an external light source. This increased
  • application of an external light source and also under dark conditions for the degradation of hazardous dyes such as methylene blue and rhodamine B. We report enhanced catalytic activity of the synthesized CuO nanopetals, even without the use of an external light source (UV/visible light) for the degradation
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Published 30 May 2017

ZnO nanoparticles sensitized by CuInZnxS2+x quantum dots as highly efficient solar light driven photocatalysts

  • Florian Donat,
  • Serge Corbel,
  • Halima Alem,
  • Steve Pontvianne,
  • Lavinia Balan,
  • Ghouti Medjahdi and
  • Raphaël Schneider

Beilstein J. Nanotechnol. 2017, 8, 1080–1093, doi:10.3762/bjnano.8.110

Graphical Abstract
  • composites prepared for the photocatalytic degradation of pollutants require a relatively large quantity of CIS nanocrystals to be complete (20 wt % CIS QDs relative to ZnO) [34][37]. When the ZCIS/ZnO weight ratio was decreased to ≈7%, the photodegradation never exceeded 80% even using a light source
  • simulated solar light irradiation of the ZnO/ZCIS catalyst, electrons are promoted from the VB to the CB of both ZCIS and ZnO materials (although ZCIS QDs are more easily excited by the light source used in this study). Because the CB of ZnO is more positive than that of the ZCIS QDs (−0.335 eV and −0.59 eV
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Published 17 May 2017

CVD transfer-free graphene for sensing applications

  • Chiara Schiattarella,
  • Sten Vollebregt,
  • Tiziana Polichetti,
  • Brigida Alfano,
  • Ettore Massera,
  • Maria Lucia Miglietta,
  • Girolamo Di Francia and
  • Pasqualina Maria Sarro

Beilstein J. Nanotechnol. 2017, 8, 1015–1022, doi:10.3762/bjnano.8.102

Graphical Abstract
  • different strategies, such as the introduction of a heater or a UV light source on board, able to restore the basic device conditions at the end of exposure to analyte [9][10][11][12][13]. Another possibility is to record the signal derivative of conductance [8] with a differentiator operational amplifier
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Published 08 May 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
  • by illuminating the sample with an external light source at frequency ω. The scattering geometry is illustrated in Figure 1A where a rough metal surface with z = h(x,y) denotes the substrate, and where the semi-infinite metal occupies the lower half-space z ≤ h(x,y) which is characterized by an
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Published 28 Apr 2017

High photocatalytic activity of Fe2O3/TiO2 nanocomposites prepared by photodeposition for degradation of 2,4-dichlorophenoxyacetic acid

  • Shu Chin Lee,
  • Hendrik O. Lintang and
  • Leny Yuliati

Beilstein J. Nanotechnol. 2017, 8, 915–926, doi:10.3762/bjnano.8.93

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  • have been widely suggested for environmental remediation under mild conditions. In the presence of only a photocatalyst and a light source of appropriate energy, the process can mineralize organic pollutants to harmless products such as carbon dioxide and water. Among the semiconductor photocatalysts
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Published 24 Apr 2017

Fiber optic sensors based on hybrid phenyl-silica xerogel films to detect n-hexane: determination of the isosteric enthalpy of adsorption

  • Jesús C. Echeverría,
  • Ignacio Calleja,
  • Paula Moriones and
  • Julián J. Garrido

Beilstein J. Nanotechnol. 2017, 8, 475–484, doi:10.3762/bjnano.8.51

Graphical Abstract
  • vacuum and dosing system, controllers for temperature and pressure inside the measuring cell, and software for programing the response cycles and storing experimental data. The optical system included a 50/50 coupler with a 62.5 µm core diameter connected to a white light source (DH-2000, Mikropack), a
  • , Ph40 and Ph50 at 298 K is plotted as a function of the wavelength. The features of the spectra are those of the radiation of the white light source. Figure 4b shows the response of the sensing element Ph40 as a function of wavelength at 298 K under vacuum, and after dosing n-hexane to reach 35 and 70
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Published 21 Feb 2017

Photocatalysis applications of some hybrid polymeric composites incorporating TiO2 nanoparticles and their combinations with SiO2/Fe2O3

  • Andreea Laura Chibac,
  • Tinca Buruiana,
  • Violeta Melinte and
  • Emil C. Buruiana

Beilstein J. Nanotechnol. 2017, 8, 272–286, doi:10.3762/bjnano.8.30

Graphical Abstract
  • phenol (1.06 × 10−3 M) or hydroquinone/dopamine (0.5 × 10−3 M) aqueous solutions. The mixture was then constantly irradiated with UV light (Hg–Xe lamp, λ = 365 nm, light intensity ca. 8 mW·cm−2) or visible light source (Xe lamp, λ = 400–800 nm). 1.5 mL of the irradiated solution was collected at given
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Published 27 Jan 2017

Flexible photonic crystal membranes with nanoparticle high refractive index layers

  • Torben Karrock,
  • Moritz Paulsen and
  • Martina Gerken

Beilstein J. Nanotechnol. 2017, 8, 203–209, doi:10.3762/bjnano.8.22

Graphical Abstract
  • experimental characterization is conducted in a transmission light microscope setup (Figure 8). The parallelized beam of the microscope light source is sent through a polarization filter. Its polarization direction is adjusted to 45° with respect to the sample’s grating direction. The flexible photonic crystal
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Published 20 Jan 2017

Laser irradiation in water for the novel, scalable synthesis of black TiOx photocatalyst for environmental remediation

  • Massimo Zimbone,
  • Giuseppe Cacciato,
  • Mohamed Boutinguiza,
  • Vittorio Privitera and
  • Maria Grazia Grimaldi

Beilstein J. Nanotechnol. 2017, 8, 196–202, doi:10.3762/bjnano.8.21

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  • photon efficiency in the UV range was calculated according to ISO10678:2010 [27]. The quantum efficiency (QE) was calculated as the ratio between the apparent photon efficiency and the measured absorbance in the wavelength range of the light source. QE represents the ratio between the number of molecules
  • degraded for unit of time (and area) and the number of photons adsorbed by the sample per unit of time (and area). The UV light source (TL 8W BLB 1FM, Philips) spectrum was centred at 368 nm with a FWHM of less than 10 nm, the measured irradiance was about 1.5 mW/cm2. Results and Discussion When a high
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Published 19 Jan 2017

Optical and photocatalytic properties of TiO2 nanoplumes

  • Viviana Scuderi,
  • Massimo Zimbone,
  • Maria Miritello,
  • Giuseppe Nicotra,
  • Giuliana Impellizzeri and
  • Vittorio Privitera

Beilstein J. Nanotechnol. 2017, 8, 190–195, doi:10.3762/bjnano.8.20

Graphical Abstract
  • different chemical etching time. Although the measured spectra include wavelengths from 200 to 800 nm we will focus on the UV region, since the light source of photocatalytic experiments emits in this range (dashed vertical line). In this region the absolute values of reflectance for Ti (70-60) and Ti (70
  • (b) measurements in the range of 200–800 nm. The vertical lines mark the wavelength of the UV-A light source used for the photocatalytic experiments. Fitting of the transmittance and reflectance spectra of Ti (430-190). Acknowledgements This research was supported by the FP7 European ProjectWATER
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Published 18 Jan 2017

Photo-ignition process of multiwall carbon nanotubes and ferrocene by continuous wave Xe lamp illumination

  • Paolo Visconti,
  • Patrizio Primiceri,
  • Daniele Longo,
  • Luciano Strafella,
  • Paolo Carlucci,
  • Mauro Lomascolo,
  • Arianna Cretì and
  • Giuseppe Mele

Beilstein J. Nanotechnol. 2017, 8, 134–144, doi:10.3762/bjnano.8.14

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  • Campus, Lecce 73100, Italy 10.3762/bjnano.8.14 Abstract This work aims to investigate and characterize the photo-ignition phenomenon of MWCNT/ferrocene mixtures by using a continuous wave (CW) xenon (Xe) light source, in order to find the power ignition threshold by employing a different type of light
  • nanoparticles content according to previously published results when using a different type of light source (i.e., pulsed vs CW Xe light source). Furthermore, less light power is required to trigger photo-ignition when moving towards the ultraviolet (UV) region. This is in agreement with the measured absorption
  • itself in its excited form and is thus capable of promoting electron transfer to MWCNTs. In this way, the resulting radical species, FeCp2+∙ and MWCNT−, easily react with oxygen giving rise to the ignition of MWCNT/ferrocene samples. Keywords: absorption spectra; CW Xe light source; metal nanoparticle
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Published 13 Jan 2017

Sub-nanosecond light-pulse generation with waveguide-coupled carbon nanotube transducers

  • Felix Pyatkov,
  • Svetlana Khasminskaya,
  • Vadim Kovalyuk,
  • Frank Hennrich,
  • Manfred M. Kappes,
  • Gregory N. Goltsman,
  • Wolfram H. P. Pernice and
  • Ralph Krupke

Beilstein J. Nanotechnol. 2017, 8, 38–44, doi:10.3762/bjnano.8.5

Graphical Abstract
  • τtherm for the parameter range given above is 5–70 ps, making CNTs an ultra-fast thermal light source. Indeed by using an ultra-fast single-photon detector, we were able to prove that our WG-CNT transducers have a characteristic time scale for signal conversion of about 80 ps. Figure 4e shows
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Published 05 Jan 2017

Fundamental properties of high-quality carbon nanofoam: from low to high density

  • Natalie Frese,
  • Shelby Taylor Mitchell,
  • Christof Neumann,
  • Amanda Bowers,
  • Armin Gölzhäuser and
  • Klaus Sattler

Beilstein J. Nanotechnol. 2016, 7, 2065–2073, doi:10.3762/bjnano.7.197

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  • spectroscopy is a valuable method for the characterization of carbon nanofoam [24]. In these studies, Raman spectra were recorded using a micro Raman spectrometer (LabRAM ARAMIS) which was operated in the backscattering mode. As light source we used a diode laser at 473 nm, which was focused onto the sample
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Published 27 Dec 2016

Organoclay hybrid materials as precursors of porous ZnO/silica-clay heterostructures for photocatalytic applications

  • Marwa Akkari,
  • Pilar Aranda,
  • Abdessalem Ben Haj Amara and
  • Eduardo Ruiz-Hitzky

Beilstein J. Nanotechnol. 2016, 7, 1971–1982, doi:10.3762/bjnano.7.188

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  • , using custom-made equipment. A 300 W UV lamp (Osram Ultra Vitalux E27, 240 V, 300 W, UVA/UVB) with the strongest emission at 354 nm was used as light source and placed above a glass reactor at a distance of 10 cm. Water was circulated through the reactor jacket to ensure a constant temperature of 17
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Published 12 Dec 2016

Cubic chemically ordered FeRh and FeCo nanomagnets prepared by mass-selected low-energy cluster-beam deposition: a comparative study

  • Veronique Dupuis,
  • Anthony Robert,
  • Arnaud Hillion,
  • Ghassan Khadra,
  • Nils Blanc,
  • Damien Le Roy,
  • Florent Tournus,
  • Clement Albin,
  • Olivier Boisron and
  • Alexandre Tamion

Beilstein J. Nanotechnol. 2016, 7, 1850–1860, doi:10.3762/bjnano.7.177

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  • spectroscopy experiments at each specific Fe and Rh M edge (respectively the Co L edge), at the “X-Treme” beamline at the Swiss Light Source for the FeRh sample and at the “DEIMOS” beamline at the SOLEIL synchrotron for FeCo for various nanocluster sizes (Figure 9); before and after annealing of the same
  • scattering spectrum on annealed FeCo nanoparticles with 5 nm in diameter [11]. Acknowledgements The authors are grateful to S. Rusponi and H. Brune from EPFL for stimulating discussions, J. Dreiser, C. Piamonteze and F. Nolting from the Swiss Light Source on the X-Treme beamline and E. Otero and P. Ohresser
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Published 28 Nov 2016

Surface-enhanced infrared absorption studies towards a new optical biosensor

  • Lothar Leidner,
  • Julia Stäb,
  • Jennifer T. Adam and
  • Günter Gauglitz

Beilstein J. Nanotechnol. 2016, 7, 1736–1742, doi:10.3762/bjnano.7.166

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  • chemical and a biological sensor by measuring the optical thickness change of a sensitive layer. The idea behind this concept is monitoring thin film growth by evaluation of the corresponding interference spectrum of a white light source. When the film is illuminated by a white light source, assuming
  • -established sensor system working with a white light source in the visible part of the electromagnetic spectrum. Selectivity is gained by bio-functionalization of the sensitive interference layer on top of the layer system. This work investigated whether is it advantageous to migrate the spectrum to the mid
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Published 16 Nov 2016

Sb2S3 grown by ultrasonic spray pyrolysis and its application in a hybrid solar cell

  • Erki Kärber,
  • Atanas Katerski,
  • Ilona Oja Acik,
  • Arvo Mere,
  • Valdek Mikli and
  • Malle Krunks

Beilstein J. Nanotechnol. 2016, 7, 1662–1673, doi:10.3762/bjnano.7.158

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  • calibrated silicon reference detector. The Xe lamp is a light source that simulates the conventional AM1.5 spectrum for testing solar cells. The dispersed light from the Xe lamp (incident on the solar cell as monochromatic light) was optically chopped at 30 Hz. The EQE is defined as the number of collected
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Published 10 Nov 2016

Nanostructured germanium deposited on heated substrates with enhanced photoelectric properties

  • Ionel Stavarache,
  • Valentin Adrian Maraloiu,
  • Petronela Prepelita and
  • Gheorghe Iordache

Beilstein J. Nanotechnol. 2016, 7, 1492–1500, doi:10.3762/bjnano.7.142

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  • stronger light source in the NIR range. Reflectance spectra were obtained using a double beam UV–vis–NIR spectrophotometer (250–3000 nm, Perkin Elmer 950) with specular reflectance accessory (B0086703) at a fixed incidence angle (6°). The response speed of the photodetector test structure was measured by
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Published 21 Oct 2016
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