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Search for "reflectance" in Full Text gives 210 result(s) in Beilstein Journal of Nanotechnology. Showing first 200.

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

Graphical Abstract
  • light [23], compared with the undoped TiO2. The optical absorption spectrum of TN-580 (Figure S7, see Supporting Information File 1) shows that the sample absorbs light up to 500 nm, whereas TO-580 and CH-W do not. A comparison of the diffuse reflectance spectra of the N-doped TiO2 (not shown) reveals
  • sample holder. Diffuse reflectance spectra were acquired in the 200–800 nm range with a 0.5 nm step size using a UV–vis–NIR spectrometer (Shimadzu UV-3600) equipped with an integrating sphere (ISR-3100, 60 mm) and BaSO4 as a standard. The Kubelka–Munk function was applied to convert the diffuse
  • reflectance into the absorbance [46]. The optical band-gaps energy (Eg) was determined from the wavelength at which the tangent of the absorbance line intersected the abscissa coordinate. The chemical analysis of the sodium content was done using a FE-SEM equipped with an energy dispersive X-ray spectrometry
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Published 27 Mar 2015

Simple approach for the fabrication of PEDOT-coated Si nanowires

  • Mingxuan Zhu,
  • Marielle Eyraud,
  • Judikael Le Rouzo,
  • Nadia Ait Ahmed,
  • Florence Boulc’h,
  • Claude Alfonso,
  • Philippe Knauth and
  • François Flory

Beilstein J. Nanotechnol. 2015, 6, 640–650, doi:10.3762/bjnano.6.65

Graphical Abstract
  • nanowire density on the substrate. For a tapering time of less than 30 s, the reflectance does not show significant change: a 10 s tapering leads to a reflection of less than 5% and a 30 s tapering to a reflection of less than 6%. This suggests that there is still a strong light trapping effect in the
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Published 04 Mar 2015

Self-assembled anchor layers/polysaccharide coatings on titanium surfaces: a study of functionalization and stability

  • Ognen Pop-Georgievski,
  • Dana Kubies,
  • Josef Zemek,
  • Neda Neykova,
  • Roman Demianchuk,
  • Eliška Mázl Chánová,
  • Miroslav Šlouf,
  • Milan Houska and
  • František Rypáček

Beilstein J. Nanotechnol. 2015, 6, 617–631, doi:10.3762/bjnano.6.63

Graphical Abstract
  • measurement chamber was continuously purged with dry air. The acquisition time was approximately 20 min at a resolution of 2 cm−1. The spectra are reported as −log(R/R0), where R is the reflectance of the sample and R0 is the reflectance of bare titanium reference surfaces. Atomic force microscopy (AFM): AFM
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Published 02 Mar 2015

Tm-doped TiO2 and Tm2Ti2O7 pyrochlore nanoparticles: enhancing the photocatalytic activity of rutile with a pyrochlore phase

  • Desiré M. De los Santos,
  • Javier Navas,
  • Teresa Aguilar,
  • Antonio Sánchez-Coronilla,
  • Concha Fernández-Lorenzo,
  • Rodrigo Alcántara,
  • Jose Carlos Piñero,
  • Ginesa Blanco and
  • Joaquín Martín-Calleja

Beilstein J. Nanotechnol. 2015, 6, 605–616, doi:10.3762/bjnano.6.62

Graphical Abstract
  • study the optical properties of the samples and to determine the band gap energy, UV–vis spectroscopy in diffuse reflectance (DR–UV–vis) mode was used. The custom-built system was composed of: (i) an integrating sphere (Spectra Tech), (ii) a spectrometer (USB2000+, Ocean Optics), and (iii) a xenon lamp
  • (Spectral Products, ASB-XE-175) as an illumination source. The Kubelka–Munk formalism and Tauc plots were used to determine the band gap energy. The Kubelka–Munk function for diffuse reflectance (R) is For a semiconductor, the plot of [f(R)·hν]n versus hν shows a linear region for n = ½ if the band gap is
  • synthesized samples obtained in diffuse reflectance mode. Band gap energy values as a function of Tm doping concentration at different annealing temperatures. Raman spectra obtained using a 532 nm (a) and a 785 nm (b) illumination source. (a) TEM image of 2 atom % Tm-doped sample annealed at 1173 K and EELS
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Published 02 Mar 2015

Novel ZnO:Ag nanocomposites induce significant oxidative stress in human fibroblast malignant melanoma (Ht144) cells

  • Syeda Arooj,
  • Samina Nazir,
  • Akhtar Nadhman,
  • Nafees Ahmad,
  • Bakhtiar Muhammad,
  • Ishaq Ahmad,
  • Kehkashan Mazhar and
  • Rashda Abbasi

Beilstein J. Nanotechnol. 2015, 6, 570–582, doi:10.3762/bjnano.6.59

Graphical Abstract
  • formulations of ZnO:Ag (1, 3, 5, 10, 20 and 30% Ag) were synthesized by a simple co-precipitation method and characterized by powder X-ray diffraction, scanning electron microscopy, Rutherford back scattering and diffuse reflectance spectroscopy for their structure, morphology, composition and optical band gap
  • reflectance spectra (DRS) analysis show a characteristic absorption edge near 390 nm (Figure 3b). The non-doped ZnO showed a high reflectance, while Ag-doped ZnO showed low reflectance and more absorbance in the visible region. Moreover, the intensity of reflectance decreased with the increase of Ag contents
  • the backscattering angle was 170°. The data was analyzed via XRUMP and SIMNRA. Optical properties of composites were studied on a Lambda 950 UV–vis–NIR spectrometer. The diffused reflectance spectra were collected within a range from 900 nm to 2500 nm through an integrating sphere. Band gap energies
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Published 26 Feb 2015

Silica micro/nanospheres for theranostics: from bimodal MRI and fluorescent imaging probes to cancer therapy

  • Shanka Walia and
  • Amitabha Acharya

Beilstein J. Nanotechnol. 2015, 6, 546–558, doi:10.3762/bjnano.6.57

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  • nanocomposites material was done by attenuated total reflectance FTIR (ATR FTIR), TEM, DLS, fluorescence and atomic absorption spectroscopy (AAS) studies. The TEM micrographs suggested that the average diameter of CMSC coated γ-Fe2O3 NPs and bifunctional silica-coated NPs were 9 nm (PDI = 1.17) and 9.3 nm (PDI
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Published 24 Feb 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

Graphical Abstract
  • structures to refractive index changes in aqueous solution. In the reflectance spectra, the plasmonic absorption feature is shifted to longer wavelengths due to the modification of the dielectric function surrounding the gold [1][2][3][4][15][16][17]. Figure 6 reports a simplified scheme showing the procedure
  • used to perform the optical sensing test and to regenerate the sensor chip. The normalized reflectance spectra (R/R0) of both a bare (uncoated), plasmonic, nanostructured chip and a chip coated with an ≈6 nm thick silica layer are shown. The reference reflectance spectrum (R0, Figure 6a) is measured
  • with the chip immersed in MilliQ water, and the reflectance spectrum (R, Figure 6c) is measured with the chip immersed in MilliQ water and EtOH (concentration, 3%). The optical response of the system was monitored through a series of measurements on the same solution (Figure 6, right) by evaluating the
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Published 19 Feb 2015

Conformal SiO2 coating of sub-100 nm diameter channels of polycarbonate etched ion-track channels by atomic layer deposition

  • Nicolas Sobel,
  • Christian Hess,
  • Manuela Lukas,
  • Anne Spende,
  • Bernd Stühn,
  • M. E. Toimil-Molares and
  • Christina Trautmann

Beilstein J. Nanotechnol. 2015, 6, 472–479, doi:10.3762/bjnano.6.48

Graphical Abstract
  • species. Hydrogen chloride is a byproduct. It has been reported that reaction of pyridine and hydrogen chloride may lead to the formation of pyridinium salt [31]. FTIR spectroscopy Infrared spectra were recorded at room temperature in diffuse reflectance on a Bruker Vertex 70 system equipped with a
  • Composition and growth mechanism The composition of the ALD layer is decisive for the functionality of the modified membrane, and thus was analyzed by XP and FTIR spectroscopy. Figure 2 shows diffuse reflectance FTIR spectra of a pristine PC membrane (black), and of two membranes coated with 28 (red) and 112
  • based on SiO2-surface modification. Schematics of the fabrication of SiO2 coated membranes: (a) irradiation of PC foil with GeV heavy ions, (b) chemical etching of ion tracks to form cylindrical nanochannels, (c) ALD conformal coating of porous membrane. Diffuse reflectance FTIR spectra of uncoated
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Published 16 Feb 2015

Electrical properties of single CdTe nanowires

  • Elena Matei,
  • Camelia Florica,
  • Andreea Costas,
  • María Eugenia Toimil-Molares and
  • Ionut Enculescu

Beilstein J. Nanotechnol. 2015, 6, 444–450, doi:10.3762/bjnano.6.45

Graphical Abstract
  • micrographs of CdTe nanowires deposited at (a) −400 mV; (b) −500 mV; (c) −550 mV; (d) −600 mV; (e) −650 mV; (f) −700 mV. (a) EDX spectra for a series of samples prepared at different electrode potentials; (b) Cd content versus working electrode potential. (a) Spectral reflectance curve and (b) Kubelka–Munk
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Published 12 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

Graphical Abstract
  • field emission scanning electron microscopy (FESEM), high resolution transmission electron microscopy (HRTEM), X-ray diffraction (XRD), BET surface area, UV–vis diffuse reflectance spectra (UV-DRS), Raman and photoluminescence (PL) analyses. The simple and smart synthesis anchored well the deposition
  • absorbance spectrum was calculated by using the UV–vis diffuse reflectance spectra and it is shown in Figure 7. As predicted and according to theory, the absorption band shown by anatase TiO2 sample due to the charge-transfer absorption from the oxide anions 2p orbital valence band to the conduction band of
  • radiation (225 W, 15 mA, 15 kV). The C1s binding energy of adventitious carbon (284.9 eV) was used as reference. UV–vis diffuse reflectance spectra (UV-DRS) were performed with a Shimadzu UV-2600 spectrophotometer equipped with an integrating sphere attachment. The spectra were obtained with BaSO4 as a
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Published 11 Feb 2015

Low-cost plasmonic solar cells prepared by chemical spray pyrolysis

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

Beilstein J. Nanotechnol. 2014, 5, 2398–2402, doi:10.3762/bjnano.5.249

Graphical Abstract
  • -circuit condition (VOC), current density at short-circuit condition (JSC), the fill factor (FF) and the conversion efficiency (η). The total reflectance spectra of the solar cells were measured in the wavelength range of 300–1500 nm on a Jasco V-670 spectrophotometer equipped with an integrating sphere
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Published 12 Dec 2014

In situ metalation of free base phthalocyanine covalently bonded to silicon surfaces

  • Fabio Lupo,
  • Cristina Tudisco,
  • Federico Bertani,
  • Enrico Dalcanale and
  • Guglielmo G. Condorelli

Beilstein J. Nanotechnol. 2014, 5, 2222–2229, doi:10.3762/bjnano.5.231

Graphical Abstract
  • relevant charging effect was observed. Freshly prepared samples were quickly transferred to the XPS main chamber. The XPS binding energy scale was calibrated by centering the C 1s peak (due to hydrocarbon moieties and adventitious carbon) at 285.0 eV [24][40] Infrared attenuated total reflectance spectra
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Published 25 Nov 2014

Observation and analysis of structural changes in fused silica by continuous irradiation with femtosecond laser light having an energy density below the laser-induced damage threshold

  • Wataru Nomura,
  • Tadashi Kawazoe,
  • Takashi Yatsui,
  • Makoto Naruse and
  • Motoichi Ohtsu

Beilstein J. Nanotechnol. 2014, 5, 1334–1340, doi:10.3762/bjnano.5.146

Graphical Abstract
  • decreased as the surface roughness increased. In addition, we found that the reflected light spectrum changed as degradation proceeded. We analyzed the details of the degradation by measuring instantaneous reflectance changes with a pump–probe method; we observed an increase in the generation probability of
  • density at which damages are found is defined as the LIDT. However, the practical problem is that the performance of an optical component, such as transmittance, reflectance, etc., is degraded by continuous irradiation with laser light having an energy density below the LIDT. The cause of such degradation
  • laser-induced degradation proceeded. Section 2 in Results and Discussion describes the measurement of instantaneous reflectance changes using a pump–probe method carried out to analyze the details of these spectral changes. From an increase in photo-generated carriers and the power spectrum of their
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Published 21 Aug 2014

Characterization and photocatalytic study of tantalum oxide nanoparticles prepared by the hydrolysis of tantalum oxo-ethoxide Ta83-O)2(μ-O)8(μ-OEt)6(OEt)14

  • Subia Ambreen,
  • N D Pandey,
  • Peter Mayer and
  • Ashutosh Pandey

Beilstein J. Nanotechnol. 2014, 5, 1082–1090, doi:10.3762/bjnano.5.121

Graphical Abstract
  • is also supported by the DSC graph. Band-gap determination of the Ta2O5 nanoparticles The band gap energy (Eg) is a key feature of semiconductors that determines their applications in optoelectronics. The nanoparticles were pressed into thick pellets and subject to diffuse reflectance measurement
  • , which was done with a UV–vis spectrophotometer, attached with integrating sphere to spatially integrate the radiant flux. The pellets were placed at the entrance port of the integrating sphere. The absorption spectrum of Ta2O5 nanoparticles is shown in Figure 7. The reflectance data was converted to the
  • chloroform dispersion. TEM image of the TOPO-coated Ta2O5 nanoparticles. The scale bar corresponds to 200 nm. Thermogravimetry (TGA), differential thermal analysis (DTA) and differential scanning calorimetry (DSC) of the as-synthesized Ta2O5 nanoparticles. Solid state diffuse reflectance UV–vis spectra of
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Published 18 Jul 2014

Nanodiamond-DGEA peptide conjugates for enhanced delivery of doxorubicin to prostate cancer

  • Amanee D Salaam,
  • Patrick Hwang,
  • Roberus McIntosh,
  • Hadiyah N Green,
  • Ho-Wook Jun and
  • Derrick Dean

Beilstein J. Nanotechnol. 2014, 5, 937–945, doi:10.3762/bjnano.5.107

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  • (FTIR, Nicolet Thermo Scientific) was used to confirm the chemical bonding of ND to DGEA and the presence of DOX on the ND-DGEA surface; spectra were collected from 400–3500 cm−1 at ambient temperature in attenuated total reflectance mode (ATR) with 64 scans per sample. A Zeta-sizer Nano ZS (Malvern
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Published 01 Jul 2014

Direct observation of microcavitation in underwater adhesion of mushroom-shaped adhesive microstructure

  • Lars Heepe,
  • Alexander E. Kovalev and
  • Stanislav N. Gorb

Beilstein J. Nanotechnol. 2014, 5, 903–909, doi:10.3762/bjnano.5.103

Graphical Abstract
  • refractive index of the medium (here water) and λ the wavelength. The constant phase φ accounts for potential phase shifts of π at reflectance at an optical denser medium. For Γ12 = 0 (incoherent case), beam 1 and beam 2 cannot interfere and Equation 1 is reduced to I = I1 + I2. Γ12 > 0 corresponds to a
  • reflectance at the glass–water and water–PVS interface, respectively. In general, the reflectance at an interface of medium 1 to medium 2 can be calculated from Fresnel's equations and takes, in the simplest case of normal incidence, the form [25] with n1,2 being the refractive indices of medium 1 and 2
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Published 25 Jun 2014

Optical modeling-assisted characterization of dye-sensitized solar cells using TiO2 nanotube arrays as photoanodes

  • Jung-Ho Yun,
  • Il Ku Kim,
  • Yun Hau Ng,
  • Lianzhou Wang and
  • Rose Amal

Beilstein J. Nanotechnol. 2014, 5, 895–902, doi:10.3762/bjnano.5.102

Graphical Abstract
  • tuning the optical processes in the devices. The optical processes in the solar cells include electric field intensity, charge generation rate, absorption and reflectance at all the interfaces formed between structural layers and electrodes in the devices [14][15]. These optical processes inside the
  • and this explanation is supported by the modeled results which will be discussed later. Figure 6 shows the light intensity fraction of absorption and reflectance of the TNT-based DSSCs by using GTMM with 3.3 μm, 11.5 μm, and 20.6 μm long TNT arrays. As indicated in Figure 6a, the rate of reflection of
  • , the reflectance and absorbance shows significantly reversed changes (Figure 6b and Figure 6c). As the light is illuminated into DSSCs using 11.5 μm and 20.6 μm long TNT arrays, the reflectance dramatically decreases and the absorption significantly increases, while the magnitude of light fraction
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Published 24 Jun 2014

Biomolecule-assisted synthesis of carbon nitride and sulfur-doped carbon nitride heterojunction nanosheets: An efficient heterojunction photocatalyst for photoelectrochemical applications

  • Hua Bing Tao,
  • Hong Bin Yang,
  • Jiazang Chen,
  • Jianwei Miao and
  • Bin Liu

Beilstein J. Nanotechnol. 2014, 5, 770–777, doi:10.3762/bjnano.5.89

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  • reflectance spectra of CN and CNS. Both CN and CNS feature a semiconductor-like absorption. The abrupt absorption onset for CN and CNS at ca. 450 nm is due to the photoexcitation of electrons from the valence band to the conduction band. The tail absorption in the long wavelength region for CNS could be
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Published 03 Jun 2014
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  • absorbance units defined as A = −log(R/R0), where R and R0 denote the reflectance at a given potential and at the reference potential, respectively. The respective reference potentials for R0 are specified in the figure captions. For the FTIRS measurements the Pt nanocrystals were deposited on a thin Au film
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Published 28 May 2014

Effects of the preparation method on the structure and the visible-light photocatalytic activity of Ag2CrO4

  • Difa Xu,
  • Shaowen Cao,
  • Jinfeng Zhang,
  • Bei Cheng and
  • Jiaguo Yu

Beilstein J. Nanotechnol. 2014, 5, 658–666, doi:10.3762/bjnano.5.77

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  • areas are beneficial for the enhancement of photocatalytic performance by facilitating the absorption of pollutants for degradation. UV–vis spectroscopy measurements A comparison of UV–vis diffuse reflectance spectra (DRS) and the corresponding colours of the Ag2CrO4 samples are displayed in Figure 5
  • photocatalytic reaction, the corresponding SEM and TEM images, XRD pattern, and UV–vis diffuse reflectance spectrum were collected. Figure 9a and Figure 9b show that the overall morphology and average particle size of Ag2CrO4 were not changed significantly. However, some homogenously distributed Ag nanoparticles
  • , Japan). BaSO4 was used as a reflectance standard. The nitrogen adsorption and desorption isotherms were measured by using an ASAP 2020 system (Micromertitics instruments, USA) after the samples were degassed at 180 °C. The SBET was determined by a multipoint BET method using the adsorption data in the
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Published 19 May 2014

Towards precise defect control in layered oxide structures by using oxide molecular beam epitaxy

  • Federico Baiutti,
  • Georg Christiani and
  • Gennady Logvenov

Beilstein J. Nanotechnol. 2014, 5, 596–602, doi:10.3762/bjnano.5.70

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  • . The high quality crystal structure of the epitaxial layers is confirmed by the observation of pronounced separate peaks from La2NiO4 and La2CuO4 layers up to (00 14) Bragg reflections, by the presence of Laue fringes around the main diffraction peaks (left inset) and by the X-ray reflectance (XRR
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Published 08 May 2014

High activity of Ag-doped Cd0.1Zn0.9S photocatalyst prepared by the hydrothermal method for hydrogen production under visible-light irradiation

  • Leny Yuliati,
  • Melody Kimi and
  • Mustaffa Shamsuddin

Beilstein J. Nanotechnol. 2014, 5, 587–595, doi:10.3762/bjnano.5.69

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  • particle sizes in the range of 10–70 nm. For all samples, the morphology of Cd0.1Zn0.9S was not affected by the added Ag. Figure 5 shows the diffuse reflectance UV–visible (DR UV–vis) spectra of samples prepared by the hydrothermal method. The Cd0.1Zn0.9S showed a shoulder peak around 400–500 nm (Figure 5a
  • (Perkin Elmer Lambda 900). BaSO4 was used as a reflectance standard. Photocatalytic testing. As described in the previous studies [9][16], photocatalytic hydrogen evolution was performed in a closed side irradiated-Pyrex cell equipped with a water condenser to maintain the temperature constant during the
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Published 07 May 2014

Hole-mask colloidal nanolithography combined with tilted-angle-rotation evaporation: A versatile method for fabrication of low-cost and large-area complex plasmonic nanostructures and metamaterials

  • Jun Zhao,
  • Bettina Frank,
  • Frank Neubrech,
  • Chunjie Zhang,
  • Paul V. Braun and
  • Harald Giessen

Beilstein J. Nanotechnol. 2014, 5, 577–586, doi:10.3762/bjnano.5.68

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  • -octadecanethiol (SD(CD2)17CD3, d-ODT) and present the reflectance spectra for polarization along the SRR gaps in Figure 5b. In the spectra we observe a fundamental SRR resonance at about 4.4 µm. The symmetric CD2 vibrational mode at 4790 nm (2089 cm−1) and the anti-symmetric CD2 vibrational mode at 4560 nm (2195
  • cm−1) of the d-ODT nearly coincides with the fundamental SRR mode and both of them are strongly enhanced. Additionally, we record the reflectance measurements by using a circular aperture with a diameter of about 100 µm at different positions on the sample with separation distances in the millimeter
  • . Our experimental-setup only allows reflectance and transmittance measurement for circularly polarized light in a very small frequency range. Within this spectral region the differences between absorbance and extinction (1 − transmittance) indicate no significant deviations [38]. Therefore, we
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Published 06 May 2014

Mesoporous cerium oxide nanospheres for the visible-light driven photocatalytic degradation of dyes

  • Subas K. Muduli,
  • Songling Wang,
  • Shi Chen,
  • Chin Fan Ng,
  • Cheng Hon Alfred Huan,
  • Tze Chien Sum and
  • Han Sen Soo

Beilstein J. Nanotechnol. 2014, 5, 517–523, doi:10.3762/bjnano.5.60

Graphical Abstract
  • nominal molecular formula of the material based on the XPS data is CeO1.89, comprising of around 54% Ce7O12 and 46% CeO2. The mixture of two crystalline forms is also observed in our XRD measurements and TEM results (vide infra). The UV–vis diffuse reflectance spectra (subjected to a Kubelka–Munck
  • spectrum. (c) High-resolution XPS spectrum of mesoporous cerium oxide (black circles) with the overall fit (black) and the fits to Ce4+ (blue) and Ce3+ (red). (a) UV–vis diffuse reflectance spectra of cerium oxide nanospheres (black), 7 nm CeO2 (red) nanopowder, and P25 TiO2 (blue). (b) Tauc plot for
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Published 24 Apr 2014

Dye-sensitized Pt@TiO2 core–shell nanostructures for the efficient photocatalytic generation of hydrogen

  • Jun Fang,
  • Lisha Yin,
  • Shaowen Cao,
  • Yusen Liao and
  • Can Xue

Beilstein J. Nanotechnol. 2014, 5, 360–364, doi:10.3762/bjnano.5.41

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  • particles are in a solid spherical shape and composed by nanoparticle aggregation, and the average diameter of deposited Pt nanoparticles is about 5 nm. Figure 3 shows the UV–vis diffuse reflectance spectra of the Pt@TiO2 core–shell nanostructures and the Pt/TiO2 control sample. The absorption from 250 to
  • -ray diffractometer (Cu Kα radiation) with a scanning speed of 2°/min in the 2θ range from 20 to 80°. Diffuse reflectance UV–vis spectra were acquired on a Lambda 750 UV–vis–NIR spectrophotometer (Perkin Elmer, USA). The morphology of the Pt@TiO2 nanocomposites were investigated by field emission
  • thermal conductivity detector (TCD). XRD patterns of Pt@TiO2 and Pt/TiO2 samples. TEM and SEM images of the Pt@TiO2 sample. (A) (B) TEM images of Pt@TiO2, (C) HRTEM images of Pt@TiO2, (D) SEM image of Pt@TiO2. UV–vis diffuse reflectance spectra of the Pt@TiO2 and Pt/TiO2 samples. The H2 yield from Pt@TiO2
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Published 26 Mar 2014
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