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Search for "visible light" in Full Text gives 225 result(s) in Beilstein Journal of Nanotechnology. Showing first 200.

Colorimetric gas detection by the varying thickness of a thin film of ultrasmall PTSA-coated TiO2 nanoparticles on a Si substrate

  • Urmas Joost,
  • Andris Šutka,
  • Meeri Visnapuu,
  • Aile Tamm,
  • Meeri Lembinen,
  • Mikk Antsov,
  • Kathriin Utt,
  • Krisjanis Smits,
  • Ergo Nõmmiste and
  • Vambola Kisand

Beilstein J. Nanotechnol. 2017, 8, 229–236, doi:10.3762/bjnano.8.25

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  • caused by the periodic variation of the refractive index [2]. Tuneable optical properties in opals are observed by the shift of the Bragg reflection peak of visible light, or by varying the refractive index contrast by liquid or gas infiltration in inverse opals [3][4][5]. The latter demonstrate an
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Published 24 Jan 2017

Performance of colloidal CdS sensitized solar cells with ZnO nanorods/nanoparticles

  • Anurag Roy,
  • Partha Pratim Das,
  • Mukta Tathavadekar,
  • Sumita Das and
  • Parukuttyamma Sujatha Devi

Beilstein J. Nanotechnol. 2017, 8, 210–221, doi:10.3762/bjnano.8.23

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  • characteristics of the colloidal CdS-sensitized ZnO-P, ZnO-R and ZnO-R+P films measured within the bias voltage −10 V to +10 V in visible light is shown in Supporting Information File 1, Figure S3, exhibiting ohmic response. I–V characteristics also sustain higher current generation for 1D ZnO-R than ZnO-P
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Published 23 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

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  • synthesize black TiO2 with a large optical absorption in the visible and infrared region [15][16][17][18]. The amorphous shell on a crystalline nanoparticle core, causes the formation of intragap states [19], which are responsible for the high absorption of visible light (and consequently of the black color
  • Ti films as an easy, rapid, and low-cost method to synthesize hydrogenated TiO2 nanoplumes with significant photocatalytic properties under UV and visible light irradiation. Here we report the optical properties of the TiO2 nanoplumes and their correlation with the efficiency of UV photodegradation
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Published 18 Jan 2017

Influence of hydrofluoric acid treatment on electroless deposition of Au clusters

  • Rachela G. Milazzo,
  • Antonio M. Mio,
  • Giuseppe D’Arrigo,
  • Emanuele Smecca,
  • Alessandra Alberti,
  • Gabriele Fisichella,
  • Filippo Giannazzo,
  • Corrado Spinella and
  • Emanuele Rimini

Beilstein J. Nanotechnol. 2017, 8, 183–189, doi:10.3762/bjnano.8.19

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  • excellent at scattering and absorbing visible light [6][7][8]. For these reasons, they have found an interesting application in the field of metal–semiconductor hybrid structures for solar energy conversion [9][10]. Among the different adopted methods to deposit Au nanoclusters on a substrate, electroless
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Published 18 Jan 2017

Effect of Anderson localization on light emission from gold nanoparticle aggregates

  • Mohamed H. Abdellatif,
  • Marco Salerno,
  • Gaser N. Abdelrasoul,
  • Ioannis Liakos,
  • Alice Scarpellini,
  • Sergio Marras and
  • Alberto Diaspro

Beilstein J. Nanotechnol. 2016, 7, 2013–2022, doi:10.3762/bjnano.7.192

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  • phenomenon characterizing aggregates of metallic nanostructures. The electromagnetic energy of visible light can be localized inside nanostructures below the diffraction limit by converting the optical modes into nonradiative surface plasmon resonances. The energy of the confined photons is correlated to the
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Published 16 Dec 2016

Role of RGO support and irradiation source on the photocatalytic activity of CdS–ZnO semiconductor nanostructures

  • Suneel Kumar,
  • Rahul Sharma,
  • Vipul Sharma,
  • Gurunarayanan Harith,
  • Vaidyanathan Sivakumar and
  • Venkata Krishnan

Beilstein J. Nanotechnol. 2016, 7, 1684–1697, doi:10.3762/bjnano.7.161

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  • characterized using different spectroscopic and microscopic techniques. The photocatalytic activity was evaluated by studying the degradation of a model dye (methyl orange, MO) under visible light (only) irradiation and under natural sunlight. The results reveal that the RGO-supported CdS–ZnO photocatalyst
  • performs considerably better than the unsupported CdS–ZnO nanostructures. In addition, both the catalysts perform significantly better under natural sunlight than under visible light (only) irradiation. In essence, this work paves way for tailoring the photocatalytic activity of semiconductor
  • radiation [17]. Due to this high band gap value, ZnO can only absorb ultraviolet (UV) light and this limits its practical applications [18]. Thus, in order to design more efficient photocatalysts, which are active in visible light, many research groups have devoted their studies towards dye sensitization
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Published 11 Nov 2016

High performance Ce-doped ZnO nanorods for sunlight-driven photocatalysis

  • Bilel Chouchene,
  • Tahar Ben Chaabane,
  • Lavinia Balan,
  • Emilien Girot,
  • Kevin Mozet,
  • Ghouti Medjahdi and
  • Raphaël Schneider

Beilstein J. Nanotechnol. 2016, 7, 1338–1349, doi:10.3762/bjnano.7.125

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  • been developed and their ability to degrade cyanide anions [28] or organic dyes [29][30][31][32][33] like methylene blue or methyl-orange has been demonstrated. The preparation of Ce–Cu, Ce–Pd or Ce–Ag co-doped photocatalysts to enhance the solar or the visible light catalytic response was also
  • , electronic and photocatalytic properties have been investigated. Our results demonstrate that Ce-doping improves the optical absorption ability toward visible light wavelengths and thus the photocatalytic performances. ZnO:Ce rods allow the complete degradation of the Orange II dye in ca. 80 min under solar
  • compared to ZnO (Figure 4), we also evaluated the photodegradation of Orange II under visible light (intensity = 5 mW/cm2) (Figure S4 in the Supporting Information File 1). Results obtained demonstrate that 78% of the dye was decomposed after 400 min and that the photodegradation required a longer time
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Published 26 Sep 2016

Tunable longitudinal modes in extended silver nanoparticle assemblies

  • Serene S. Bayram,
  • Klas Lindfors and
  • Amy Szuchmacher Blum

Beilstein J. Nanotechnol. 2016, 7, 1219–1228, doi:10.3762/bjnano.7.113

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  • of photonic structures is essential to increase the sensitivity and speed of photonic devices [35][36]. Common dielectric waveguides are restricted by the diffraction limit of light, which, for visible light, is several hundreds of nanometres. For nanodevices, much smaller photonic elements are
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Published 26 Aug 2016

Manufacturing and investigation of physical properties of polyacrylonitrile nanofibre composites with SiO2, TiO2 and Bi2O3 nanoparticles

  • Tomasz Tański,
  • Wiktor Matysiak and
  • Barbara Hajduk

Beilstein J. Nanotechnol. 2016, 7, 1141–1155, doi:10.3762/bjnano.7.106

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  • , obtained for composite PAN nanofibres reinforced with nanoparticles of SiO2, is due to the relatively low refractive index of SiO2, which is about 1.45 for visible light. The used polymer and the SiO2 particles have a similar n. This means the mechanism of interaction of electromagnetic radiation with
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Published 05 Aug 2016

Phenalenyl-based mononuclear dysprosium complexes

  • Yanhua Lan,
  • Andrea Magri,
  • Olaf Fuhr and
  • Mario Ruben

Beilstein J. Nanotechnol. 2016, 7, 995–1009, doi:10.3762/bjnano.7.92

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  • interesting magnetic properties. In this regard, the 9-hydroxy-1H-phenalen-1-one (HPLN) ligand has previously been utilized for the preparation of mononuclear lanthanide complexes [23][24] to study the near-infrared luminescence upon excitation with visible light. However, this work, carried out by our group
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Published 08 Jul 2016

Selective photocatalytic reduction of CO2 to methanol in CuO-loaded NaTaO3 nanocubes in isopropanol

  • Tianyu Xiang,
  • Feng Xin,
  • Jingshuai Chen,
  • Yuwen Wang,
  • Xiaohong Yin and
  • Xiao Shao

Beilstein J. Nanotechnol. 2016, 7, 776–783, doi:10.3762/bjnano.7.69

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  • shown in Figure 6. With a large energy gap, it can be found that pure NaTaO3 had low light absorbance in the visible region. After CuO was loaded, the absorbance of the CuO–NaTaO3 catalysts in the visible light region (λ > 400 nm) became much stronger with the increase of CuO loading. The increase in
  • visible light absorbance correlates with the formation rate and increase in electrons and holes on the photocatalyst surface [35]. Energy-dispersive X-ray spectroscopy (EDS) and X-ray photoelectron spectroscopy (XPS) were carried out to confirm that CuO was loaded onto the surface of NaTaO3 nanocubes
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Published 01 Jun 2016

Microwave solvothermal synthesis and characterization of manganese-doped ZnO nanoparticles

  • Jacek Wojnarowicz,
  • Roman Mukhovskyi,
  • Elzbieta Pietrzykowska,
  • Sylwia Kusnieruk,
  • Jan Mizeracki and
  • Witold Lojkowski

Beilstein J. Nanotechnol. 2016, 7, 721–732, doi:10.3762/bjnano.7.64

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  • composition analysis The chemical composition analysis was carried out by using visible-light spectrophotometry (DR 3900, Hach Lange, Germany). The analysis of the content of Zn2+ ions was carried out by using the Zincon method No. 8009 (Hach Lange). The analysis of the content of Mn2+ ions was carried out by
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Published 19 May 2016

Rigid multipodal platforms for metal surfaces

  • Michal Valášek,
  • Marcin Lindner and
  • Marcel Mayor

Beilstein J. Nanotechnol. 2016, 7, 374–405, doi:10.3762/bjnano.7.34

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Published 08 Mar 2016

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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Published 10 Dec 2015

Silica-coated upconversion lanthanide nanoparticles: The effect of crystal design on morphology, structure and optical properties

  • Uliana Kostiv,
  • Miroslav Šlouf,
  • Hana Macková,
  • Alexander Zhigunov,
  • Hana Engstová,
  • Katarína Smolková,
  • Petr Ježek and
  • Daniel Horák

Beilstein J. Nanotechnol. 2015, 6, 2290–2299, doi:10.3762/bjnano.6.235

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  • tracking [8], bioimaging [9] and photodynamic therapy [10]. Lanthanide-doped upconversion nanoparticles emit visible light upon excitation by near-IR light (NIR). Compared with organic dyes and semiconductor quantum dots, upconversion nanoparticles have attractive chemical and optical properties, as well
  • . Consequently, three different Er3+ transitions were induced by NIR photons leading to the visible light emission [37]. Hence, the NaYF4:Yb3+/Er3+ nanocrystals exhibited three bands of green (520 and 545 nm) and red (660 nm) upconversion emissions corresponding to 2H11/2 and 4S3/2 → 4I15/2 and 4F9/2 → 4I15/2
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Published 03 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

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  •  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

A single-source precursor route to anisotropic halogen-doped zinc oxide particles as a promising candidate for new transparent conducting oxide materials

  • Daniela Lehr,
  • Markus R. Wagner,
  • Johanna Flock,
  • Julian S. Reparaz,
  • Clivia M. Sotomayor Torres,
  • Alexander Klaiber,
  • Thomas Dekorsy and
  • Sebastian Polarz

Beilstein J. Nanotechnol. 2015, 6, 2161–2172, doi:10.3762/bjnano.6.222

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  • transparency over the entire visible light range. A solid solution of indium oxide and substantial amounts of tin oxide for electronic doping (ITO) is currently the most prominent example for the class of so-called TCOs (transparent conducting oxides). Due to the limited, natural occurrence of indium and its
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Published 18 Nov 2015

Mapping bound plasmon propagation on a nanoscale stripe waveguide using quantum dots: influence of spacer layer thickness

  • Chamanei S. Perera,
  • Alison M. Funston,
  • Han-Hao Cheng and
  • Kristy C. Vernon

Beilstein J. Nanotechnol. 2015, 6, 2046–2051, doi:10.3762/bjnano.6.208

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  • ). LRSPPs have been shown to have large propagation lengths in the visible light range, greater than 10 µm [6]. When quantum dots (QDs) are placed in the vicinity of propagating plasmons, QDs can be locally excited by the plasmon if the plasmon frequency lies within the absorption spectral range of the QDs
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Published 19 Oct 2015

Effect of SiNx diffusion barrier thickness on the structural properties and photocatalytic activity of TiO2 films obtained by sol–gel dip coating and reactive magnetron sputtering

  • Mohamed Nawfal Ghazzal,
  • Eric Aubry,
  • Nouari Chaoui and
  • Didier Robert

Beilstein J. Nanotechnol. 2015, 6, 2039–2045, doi:10.3762/bjnano.6.207

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  • the adsorption/bleaching of the azo molecule [18]. This means that even the dye molecule OII could absorb visible light to produce the excited singlet and/or triplet state of the OII molecule [19], the OII may be able to sensitize the TiO2 photocatalyst. However, the degradation of the OII dye via the
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Published 16 Oct 2015

High photocatalytic activity of V-doped SrTiO3 porous nanofibers produced from a combined electrospinning and thermal diffusion process

  • Panpan Jing,
  • Wei Lan,
  • Qing Su and
  • Erqing Xie

Beilstein J. Nanotechnol. 2015, 6, 1281–1286, doi:10.3762/bjnano.6.132

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  • the two photocatalysts absorb the MO fluorescence well. Figure 3c presents the UV–vis spectra of pure and V-doped SrTiO3 photocatalyst, revealing that pure SrTiO3 responds to UV light with absorption edge at about 388 nm but V-doped SrTiO3 nanofibers have a shifted absorption edge towards visible
  • light. This means that V5+ ion doping improves the impurity level and narrows the band gap of SrTiO3, leading to the enhanced light absorption. Additionally, based on earlier research regarding 3d ion doping for SrTiO3, V5+ doping may also improve the conductivity of SrTiO3. Hence, the higher
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Published 09 Jun 2015

Polymer blend lithography for metal films: large-area patterning with over 1 billion holes/inch2

  • Cheng Huang,
  • Alexander Förste,
  • Stefan Walheim and
  • Thomas Schimmel

Beilstein J. Nanotechnol. 2015, 6, 1205–1211, doi:10.3762/bjnano.6.123

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  • perforated Al films The size of the holes in the fabricated perforated metal films is in the range of the wavelength of visible light. Therefore it is interesting to investigate their optical transmission properties. It has been published in 2003 by Barnes et al. that ordered hole arrays fabricated by e-beam
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Published 26 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

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  • or through rows of particles due to the LSPR effect. Gold and silver nanowires or particles can be used for such waveguides, as these materials interact with visible light. Plasmon propagation through nanowires has been experimentally investigated. Sanders et al. [3] showed the propagation of
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Published 22 Apr 2015

Characterization of nanostructured ZnO thin films deposited through vacuum evaporation

  • Jose Alberto Alvarado,
  • Arturo Maldonado,
  • Héctor Juarez,
  • Mauricio Pacio and
  • Rene Perez

Beilstein J. Nanotechnol. 2015, 6, 971–975, doi:10.3762/bjnano.6.100

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  • can check that the emission is in the blue and the red part of the visible light, due to the contribution of the VO, VZn and VZn− defects. XRD pattern of nanostructured thin films on a glass substrate. HRSEM micrographs of the thin films a) un-annealed, b) 200, c) 400, d) 600, e) 800 and f) 1000 °C
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Published 16 Apr 2015

Effects of swift heavy ion irradiation on structural, optical and photocatalytic properties of ZnO–CuO nanocomposites prepared by carbothermal evaporation method

  • Sini Kuriakose,
  • D. K. Avasthi and
  • Satyabrata Mohapatra

Beilstein J. Nanotechnol. 2015, 6, 928–937, doi:10.3762/bjnano.6.96

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  • formation of hydroxyl radicals (•OH) and superoxide radicals (•O2−) during visible-light-induced photocatalytic degradation of acid orange and 4-nitrophenol. The formation of hydroxyl radicals (•OH) was detected by photoluminescence studies using terephthalic acid as a probe molecule, while 1,4-benzoquinone
  • visible-light-induced photocatalytic degradation. In our study, it can be clearly seen that all the irradiated ZnO–CuO nanocomposites show enhanced photocatalytic activity during the sun light driven degradation of MB and MO dyes. Our results show that swift heavy ion irradiation leads to significant
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Published 10 Apr 2015

Transformation of hydrogen titanate nanoribbons to TiO2 nanoribbons and the influence of the transformation strategies on the photocatalytic performance

  • Melita Rutar,
  • Nejc Rozman,
  • Matej Pregelj,
  • Carla Bittencourt,
  • Romana Cerc Korošec,
  • Andrijana Sever Škapin,
  • Aleš Mrzel,
  • Srečo D. Škapin and
  • Polona Umek

Beilstein J. Nanotechnol. 2015, 6, 831–844, doi:10.3762/bjnano.6.86

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  • TiO2 [22] in which the nitrogen atoms occupy substitutional and interstitial sites in the TiO2 and thus affect the photocatalytic activity of titania for reactions performed under visible-light irradiation [3][5][23][24]. On the other hand, transformation under wet-chemical or hydrothermal conditions
  • increasing calcination temperature (Figure 2). The observed effect is in agreement with the findings reported by Irie et al. [36], and Miyauchi et al. [45]. In a similar system, i.e., the photo-oxidation of iPrOH, they noticed that with an increasing N content, longer exposure times to UV and visible light
  • concentration began to rise. The system was kept at a temperature of 25 ± 3 °C and a relative humidity of 22 ± 3%. The light source was a 300 W Xe lamp (Newport Oriel Instrument, USA). The lamp imitates the solar spectrum and emits both ultraviolet (UV) and visible light (vis). The radiance intensity on the
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Published 27 Mar 2015
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