Gas-sensing behaviour of ZnO/diamond nanostructures

• Marina Davydova,
• Alexandr Laposa,
• Jiri Smarhak,
• Alexander Kromka,
• Neda Neykova,
• Josef Nahlik,
• Jiri Kroutil,
• Jan Drahokoupil and
• Jan Voves

Beilstein J. Nanotechnol. 2018, 9, 22–29, doi:10.3762/bjnano.9.4

• -shaped and (b) L-shaped. Transmission spectra of the hybrid ZnO/NCD structure without and with one or two NO2 molecules at two different orientation. Zero energy is the Fermi level. Transmission values determining the conductivity (resistivity) measured at 150 °C are within the range of 0–0.15 eV

• . Transmission spectra of hybrid ZnO NRs/NCD sensor structure with and without one CO2 molecule. Zero energy is the Fermi level. Electron density distribution of (a) T-shaped NO2 and (b) L-shaped NO2 molecules. Supporting Information Supporting Information File 12: Additional experimental data

Electro-optical characteristics of a liquid crystal cell with graphene electrodes

• Nune H. Hakobyan,
• Hakob L. Margaryan,
• Valeri K. Abrahamyan,
• Vladimir M. Aroutiounian,
• Arpi S. Dilanchian Gharghani,
• Amalya B. Kostanyan,
• Timothy D. Wilkinson and
• Nelson Tabirian

Beilstein J. Nanotechnol. 2017, 8, 2802–2806, doi:10.3762/bjnano.8.279

• were carried out on both sides (i.e., the graphene–graphene and ITO–ITO sides) of the hybrid LC cell. The transmission spectra of the both sections were measured in the visible range (Figure 3). As can be seen from the figure, the cell with ITO electrodes is more transparent for the 400–500 nm

• cell with graphene electrodes (b), and with ITO electrodes (c). The transmission spectra of graphene and indium tin oxide sections of the hybrid liquid crystal cell. Schematic of the liquid crystal characterization experiment. Light intensity vs peak-to-peak (pp) voltage applied, passing through the

Refractive index sensing and surface-enhanced Raman spectroscopy using silver–gold layered bimetallic plasmonic crystals

• Somi Kang,
• Sean E. Lehman,
• Matthew V. Schulmerich,
• An-Phong Le,
• Tae-woo Lee,
• Stephen K. Gray,
• Rohit Bhargava and
• Ralph G. Nuzzo

Beilstein J. Nanotechnol. 2017, 8, 2492–2503, doi:10.3762/bjnano.8.249

• refractive index sensing via transmission-mode spectroscopy Transmission spectra in air and bulk RI dependent PC data were measured using a Varian 5G UV–vis–NIR spectrophotometer with normal incident light and no temperature control. Bulk RI measurements were carried out using methods that have been

• /min. To change the solution, a new PEG solution was injected at a flow rate of 1.0 mL/min at the beginning stage for two minutes to completely flush the previous solution from the PDMS cell. This was followed by injection at a normal flow rate of 0.1 mL/min. Transmission spectra over a wavelength

• FDTD simulations were used to model the normal incidence transmission spectra in air and water and the electromagnetic field distribution for full-3D PCs. The unit cell geometry was defined as an infinite square array of nanostructured holes on a metal film that are parallel to the x–y plane with a

Au nanostructure fabrication by pulsed laser deposition in open air: Influence of the deposition geometry

• Rumen G. Nikov,
• Anna Og. Dikovska,
• Nikolay N. Nedyalkov,
• Georgi V. Avdeev and
• Petar A. Atanasov

Beilstein J. Nanotechnol. 2017, 8, 2438–2445, doi:10.3762/bjnano.8.242

• an AXIS Supra electron spectrometer (Kratos Analytical Ltd.). The thickness of the samples was measured using an optical profilometer (Zeta Instruments). The optical properties of the structures produced were estimated based on the transmission spectra taken using an optical spectrometer (Ocean

• mobility of gold [29]. Physical properties of the samples Figure 5 shows the optical transmission spectra of the samples produced at different PLD geometries. As can be seen, the transmission is characterized by a difference in intensity in the spectral range presented. The difference observed is related

• in the transmission spectra with minimum at ≈520 nm. The presence of this feature in the transmission could be attributed to a plasmon excitation in the nanostructures. The deposition using geometry 4 resulted in an almost flat spectrum with the lowest transmission (<3%) and no clear plasmon behavior

Spin-dependent transport and functional design in organic ferromagnetic devices

• Guichao Hu,
• Shijie Xie,
• Chuankui Wang and
• Carsten Timm

Beilstein J. Nanotechnol. 2017, 8, 1919–1931, doi:10.3762/bjnano.8.192

• explored by investigating the spin-dependent transmission under various biases. In Figure 9, the spin-resolved transmission spectra at 0 V and ±1.0 V are shown. At 0 V, there are two transmission peaks with equal distance from the Fermi energy, which result from the spin-up LUMO and the spin-down HOMO

Assembly of metallic nanoparticle arrays on glass via nanoimprinting and thin-film dewetting

• Sun-Kyu Lee,
• Sori Hwang,
• Yoon-Kee Kim and
• Yong-Jun Oh

Beilstein J. Nanotechnol. 2017, 8, 1049–1055, doi:10.3762/bjnano.8.106

• FTIR transmission spectra with increasing condensation time. All spectra, except that corresponding to the nonannealed sample, were normalized to the CH3 deformation band at 1267 cm−1. As the annealing time increased, the silanol absorption peak at 895 cm−1 decreased, while the siloxane stretching

Nanoantenna-assisted plasmonic enhancement of IR absorption of vibrational modes of organic molecules

• Alexander G. Milekhin,
• Olga Cherkasova,
• Sergei A. Kuznetsov,
• Ilya A. Milekhin,
• Ekatherina E. Rodyakina,
• Alexander V. Latyshev,
• Sreetama Banerjee,
• Georgeta Salvan and
• Dietrich R. T. Zahn

Beilstein J. Nanotechnol. 2017, 8, 975–981, doi:10.3762/bjnano.8.99

• transmission spectra polariszed along and perpendicular to the long axis of the bare nanoantennas and with deposited organic films was analyzed. The noise level was below 0.1% in the IR experiments. The measurements were carried out at room temperature. Non-polarized Raman spectra were measured using Labram

Nanocrystalline TiO₂/SnO₂ heterostructures for gas sensing

• Barbara Lyson-Sypien,
• Anna Kusior,
• Mieczylaw Rekas,
• Jan Zukrowski,
• Marta Gajewska,
• Katarzyna Michalow-Mauke,
• Thomas Graule,
• Marta Radecka and
• Katarzyna Zakrzewska

Beilstein J. Nanotechnol. 2017, 8, 108–122, doi:10.3762/bjnano.8.12

• heterostructure formation. In order to study the possible tin oxidation states, Mössbauer spectroscopy was applied. Figure 3 demonstrates transmission spectra of: a) SnO2; b) 90 mol % SnO2/10 mol % TiO2 and c) 90 mol % TiO2/10 mol % SnO2 nanopowders. The observed peaks are characteristic for Sn4+ (SnO2) for all

• of a) SnO2 and 90 mol % SnO2/10 mol % TiO2; b) TiO2 and 90 mol % TiO2/10 mol % SnO2 nanopowders. Mössbauer transmission spectra of: a) SnO2; b) 90 mol % SnO2/10 mol % TiO2; c) 90 mol % TiO2/10 mol % SnO2 nanopowders. IS denotes the isomer shift, QS is the quadrupole splitting, whereas G represents

Graphene-enhanced plasmonic nanohole arrays for environmental sensing in aqueous samples

• Christa Genslein,
• Peter Hausler,
• Eva-Maria Kirchner,
• Rudolf Bierl,
• Antje J. Baeumner and
• Thomas Hirsch

Beilstein J. Nanotechnol. 2016, 7, 1564–1573, doi:10.3762/bjnano.7.150

• than the wavelength of light has been in the focus of research in the last years [44][45]. In one example, the influence of the nanohole diameter at a fixed periodicity on the transmission spectra was investigated. With decreasing hole diameter the SPR wavelength shifts to shorter wavelengths and hence

Localized surface plasmons in structures with linear Au nanoantennas on a SiO₂/Si surface

• Ilya A. Milekhin,
• Sergei A. Kuznetsov,
• Ekaterina E. Rodyakina,
• Alexander G. Milekhin,
• Alexander V. Latyshev and
• Dietrich R. T. Zahn

Beilstein J. Nanotechnol. 2016, 7, 1519–1526, doi:10.3762/bjnano.7.145

• between plasmonic excitations of gold nanoantennas and optical phonons in SiO2 leads to the appearance of new plasmon–phonon modes observed in the infrared transmission spectra the frequencies of which are well predicted by the simulations. Keywords: nanoantenna array; localised surface plasmon resonance

• described in [34]. Because of technological restrictions, the operating area of the fabricated nanoantenna arrays was limited by 3 × 3 mm2. The structural parameters of the nanoantennas were controlled by scanning electron microscopy. The IR transmission spectra of the fabricated Au nanoantenna arrays were

• transmission spectra of the fabricated nanoantennas described above are shown in Figure 2. The spectra demonstrate distinct deep minima, the position of which corresponds to the LSPR energy. As predicted earlier [35], the experimentally determined LSPR wavelength depends linearly on the antenna length in a

Electric field induced structural colour tuning of a silver/titanium dioxide nanoparticle one-dimensional photonic crystal

• Eduardo Aluicio-Sarduy,
• Simone Callegari,
• Diana Gisell Figueroa del Valle,
• Andrea Desii,
• Ilka Kriegel and
• Francesco Scotognella

Beilstein J. Nanotechnol. 2016, 7, 1404–1410, doi:10.3762/bjnano.7.131

• want to emphasize the fundamentally different nature of the two resonances observed in our device, namely the plasmonic resonance of the silver nanoparticle layer and that of the photonic bandgap. The pump–probe measurement in Figure 3a shows the transmission spectra of the transient absorption

• as given in [28] and two artificially increased carrier densities. Similar to the experimental results, the calculated transmission spectra show an intense band in the UV/blue region ascribed to the plasmon resonance of the silver layer and a second band corresponding to the photonic bandgap. Note

• substrate, was covered with another ITO substrate in order to apply an electric field. To apply an electric field, we employed a simple voltage supply with a 100× amplifier. The transmission spectra were collected with a Shimazdu spectrophotometer. Pump–probe experiment For this experiment, an amplified

Optical absorption signature of a self-assembled dye monolayer on graphene

• Tessnim Sghaier,
• Sylvain Le Liepvre,
• Céline Fiorini,
• Ludovic Douillard and
• Fabrice Charra

Beilstein J. Nanotechnol. 2016, 7, 862–868, doi:10.3762/bjnano.7.78

• formation of multilayers can thus be ruled out. Transmission spectra The solution spectrum of PTCDI-C13 is reported in Figure 3 (labelled “SOL”). It presents the typical vibronic structure of a π–π* transition, with an energy difference of 0.18 eV (ca. 1450 cm−1) between 0–0, 0–1 and 0–2 sub-bands which is

• chemical calculations have shown that the transition dipole moment corresponding to the π–π* transition is aligned along the N–N′-axis [33]. The difference transmission spectra between self-assembled monolayer on a substrate of monolayer CVD graphene transferred onto fused quartz are shown in Figure 3. Two

• transmission spectra of SAM1 and SAM2 are nearly identical and correspond to a rigid bathochromic shift of 0.14 eV (1130 cm−1) of the whole vibronic system. This quantitative similarity further supports the homogeneous formation of one monolayer by dip coating, as was shown in the case of drop casting. At the

Bacteriorhodopsin–ZnO hybrid as a potential sensing element for low-temperature detection of ethanol vapour

• Saurav Kumar,
• Sudeshna Bagchi,
• Senthil Prasad,
• Anupma Sharma,
• Ritesh Kumar,
• Rishemjit Kaur,
• Jagvir Singh and
• Amol P. Bhondekar

Beilstein J. Nanotechnol. 2016, 7, 501–510, doi:10.3762/bjnano.7.44

• FTIR analysis was carried in ATR mode and the transmission spectra were analysed. Gas sensing setup The gas sensing measurements were carried out in a customized chamber (Taguchi Gas sensing kit). The chamber was sealed to minimize the effect of atmosphere on the substrate. The ZnO-TF and ZnO-NR

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

• Al templates were fabricated in this work by metal PBL. The wavelength-selective optical transmission spectra due to the localized surface plasmonic effect of the holes in perforated Al films were investigated and compared to the respective hole diameter histograms. Keywords: localized surface

• Asylum MFP-3D controller. The transmission spectra were measured by a Varian Cary 500 Scan UV–vis spectrometer with open reference beam. Schematic drawing and experimental results of the metal PBL process for the fabrication of metal nano-patterns. a) A blend film (PS/PMMA 3:7 mass ratio) is formed

• (PS/PMMA mass ratio 4:6) with a hole coverage area of 23.4%. a) and b): The hole size distributions are shown with red columns, the data are the summarization of five 15 μm × 15 μm AFM images taken at randomly selected positions. The optical transmission spectra, taken at various sample positions, are

Tunable light filtering by a Bragg mirror/heavily doped semiconducting nanocrystal composite

• Ilka Kriegel and
• Francesco Scotognella

Beilstein J. Nanotechnol. 2015, 6, 193–200, doi:10.3762/bjnano.6.18

• modified, we envisage a filter with properties that can be fine-tuned through a broad range of frequencies according to the desired application. Theoretical Methods To calculate the transmission spectra of the photonic crystal component in the structure, the transfer matrix method was employed, which is a

Microstructural and plasmonic modifications in Ag–TiO₂ and Au–TiO₂ nanocomposites through ion beam irradiation

• Venkata Sai Kiran Chakravadhanula,
• Yogendra Kumar Mishra,
• Venkata Girish Kotnur,
• Devesh Kumar Avasthi,
• Thomas Strunskus,
• Vladimir Zaporotchenko,
• Dietmar Fink,
• Lorenz Kienle and
• Franz Faupel

Beilstein J. Nanotechnol. 2014, 5, 1419–1431, doi:10.3762/bjnano.5.154

• irradiated Au–TiO2 nanocomposite films (with an MVF of about 7% and 15%) have been measured by using UV–visible spectroscopy and are discussed here. Figure 6 shows the SPR absorption spectra (a,b) and transmission spectra (c,d) of nanocomposite films with MVF ≈ 7% and 15%, respectively. After irradiation (up

• to 1 × 1013 ions/cm2), the UV–visible spectra for both nanocomposites show a red shift of the SPR peak position. The shift of the SPR peak is larger for the nanocomposite film having a higher MVF (Δλ ≈ 35 nm for MVF ≈ 7% and Δλ ≈ 60 nm for MVF ≈ 15%, respectively). The transmission spectra for

• observed after ion irradiation. The transmission spectra of the Ag–TiO2 nanocomposite films are shown in Figure 7c,d and it can be observed that trend is almost similar to that of Au–TiO2 nanocomposites. However, the behavior in vicinity of the band-edges (TiO2 and SPR) is quite different. The broadening

Controlling the near-field excitation of nano-antennas with phase-change materials

• Tsung Sheng Kao,
• Yi Guo Chen and
• Ming Hui Hong

Beilstein J. Nanotechnol. 2013, 4, 632–637, doi:10.3762/bjnano.4.70

• obtained from [17]. With these supposed material parameters carried out in the FDTD simulation, the corresponding refractive index values and the transmission spectra of a GST thin film at different intermediate states can be obtained by carefully selecting the proportion value m. The phase transition of a

• increased, the GST thin film gradually changed from the amorphous state to the crystalline state. A UV–vis–NIR spectrophotometer (SHIMADZU, Co.) was employed to measure the transmission spectra of the GST thin film at different intermediate phases. Figure 2 shows the comparison between the experimental

• spectra measurements (solid lines) and the simulated far-field transmission spectra (dashed lines) of a GST thin film switched at different intermediate phases. A good agreement in both spectral results suggests that a phase-change GST thin film can be well controlled at different crystallization levels

Kelvin probe force microscopy of nanocrystalline TiO₂ photoelectrodes

• Alex Henning,
• Gino Günzburger,
• Res Jöhr,
• Yossi Rosenwaks,
• Biljana Bozic-Weber,
• Catherine E. Housecroft,
• Edwin C. Constable,
• Ernst Meyer and
• Thilo Glatzel

Beilstein J. Nanotechnol. 2013, 4, 418–428, doi:10.3762/bjnano.4.49

• extraction of Eg by means of SPS is superior to the usual transmission spectra since it is also applicable to thin layers, nanowires, or single nanoparticles and also for opaque samples [18]. Under illumination with a sufficiently low light intensity, the SPV can be assumed to be proportional to the

Strong spin-filtering and spin-valve effects in a molecular V–C₆₀–V contact

• Mohammad Koleini and
• Mads Brandbyge

Beilstein J. Nanotechnol. 2012, 3, 589–596, doi:10.3762/bjnano.3.69

• accessible for experiments. STM system picking up C60 with a magnetic tip, approaching a magnetic adatom on the nonmagnetic copper surface. The orange, red and gray spheres depict copper, vanadium and carbon atoms, respectively. A C60-pentagon is facing the tip/adatom. Transmission spectra for FM and AFM

• arrangements. The first row shows spin-resolved transmission spectra for each arrangement. The second row demonstrates the corresponding transmission spin polarization as defined in the text. The third and forth rows show transmission eigenvalues for three channels in each spin component. Scattering states at

Transmission eigenvalue distributions in highly conductive molecular junctions

• Justin P. Bergfield,
• Joshua D. Barr and
• Charles A. Stafford

Beilstein J. Nanotechnol. 2012, 3, 40–51, doi:10.3762/bjnano.3.5

• transmission eigenchannels into molecular resonances based on the isolated resonance approximation, which helps to illustrate the workings of our many-body theory, and facilitates unambiguous interpretation of transmission spectra. Conclusion: We confirm that Pt–benzene–Pt junctions have two dominant

• approximation further, we calculated the average total transmission through a Pt–benzene–Pt junction. The transmission spectra calculated using the full molecular spectrum, the isolated HOMO resonance and the isolated LUMO resonance are each shown as a function of the chemical potential of the leads μPt in

When “small” terms matter: Coupled interference features in the transport properties of cross-conjugated molecules

• Gemma C. Solomon,
• Justin P. Bergfield,
• Charles A. Stafford and
• Mark A. Ratner

Beilstein J. Nanotechnol. 2011, 2, 862–871, doi:10.3762/bjnano.2.95

• draw the larger systems with one cross-conjugated unit up and one down there would be no difference in the Hamiltonian if we instead wanted to model the system where both units were pointing in the same direction. The transmission spectra of the 1cc, 2cc and 2ccs junctions are shown in Figure 3

• the transport. The transmission spectra through the π-orbitals of 1cc, 2cc and 2ccs based junctions calculated by using the MDE many-body theory (using the Hamiltonian of Equation 10) are shown in Figure 9, and no supernodes are observed. Qualitatively, the splitting of the central supernode in the

Towards multiple readout application of plasmonic arrays

• Dana Cialla,
• Karina Weber,
• René Böhme,
• Uwe Hübner,
• Henrik Schneidewind,
• Matthias Zeisberger,
• Roland Mattheis,
• Robert Möller and
• Jürgen Popp

Beilstein J. Nanotechnol. 2011, 2, 501–508, doi:10.3762/bjnano.2.54

• -label Cy3.5, attached to a DNA strand, in comparison to the transmission spectra of various plasmonic arrays. The transmission minima (indicating the LSPR excitation) overlap with the absorption and emission spectra differently. (B) The detected fluorescence intensity is normalized with respect to the

• Petschulat and Thomas Pertsch for providing the transmission spectra. Further, D.C. thanks Keiko Munechika, Yeechi Chen and David Ginger for helpful discussions during the stay at Ginger Research Lab (University of Washington) in summer 2009.