An ellipsometric approach towards the description of inhomogeneous polymer-based Langmuir layers

• Falko O. Rottke,
• Burkhard Schulz,
• Klaus Richau,
• Karl Kratz and
• Andreas Lendlein

Beilstein J. Nanotechnol. 2016, 7, 1156–1165, doi:10.3762/bjnano.7.107

• Δ into thickness maps and therefore to achieve quantitative analysis of the 3D morphology of the Langmuir layers with lateral resolution at the µm scale. Exploiting the nulling-based ellipsometric contrast in this way avoids the methodological problems inherent in the photometric evaluation of BAM

Signal enhancement in cantilever magnetometry based on a co-resonantly coupled sensor

• Julia Körner,
• Christopher F. Reiche,
• Thomas Gemming,
• Bernd Büchner,
• Gerald Gerlach and
• Thomas Mühl

Beilstein J. Nanotechnol. 2016, 7, 1033–1043, doi:10.3762/bjnano.7.96

• shifts. The effective spring constants determine the sensitivity for each resonance peak of the coupled system and have to be known for a quantitative analysis of the measured data. In order to obtain them for the given sensor geometry we will be using an approximate formula to calculate the expected

Improved biocompatibility and efficient labeling of neural stem cells with poly(L-lysine)-coated maghemite nanoparticles

• Igor M. Pongrac,
• Marina Dobrivojević,
• Lada Brkić Ahmed,
• Michal Babič,
• Miroslav Šlouf,
• Daniel Horák and
• Srećko Gajović

Beilstein J. Nanotechnol. 2016, 7, 926–936, doi:10.3762/bjnano.7.84

• panel) indicated the distribution of iron oxide nanoparticles. Nuclear Fast Red staining showed the position of nuclei. Scale bar: 50 µm. Quantitative analysis of NSC labeling of PLL-γ-Fe2O3 and nanomag®-D-spio nanoparticles. Overtone cumulative histogram subtraction of flow cytometry histograms of NSCs

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

• using the 1-(2-pyridylazo)-2-naphthol (PAN) method No. 8149 (Hach Lange). The chemical composition analysis was carried out by using inductively coupled argon plasma optical emission spectrometry (ICP-OES) (Thermo Scientific, iCAP model 6000, Great Britain). Samples for the quantitative analysis were

Orientation of FePt nanoparticles on top of a-SiO₂/Si(001), MgO(001) and sapphire(0001): effect of thermal treatments and influence of substrate and particle size

• Martin Schilling,
• Paul Ziemann,
• Zaoli Zhang,
• Johannes Biskupek,
• Ute Kaiser and
• Ulf Wiedwald

Beilstein J. Nanotechnol. 2016, 7, 591–604, doi:10.3762/bjnano.7.52

• to the center. Quantitative analysis of their spacing suggests an assignment to domains in the chemically ordered L10 phase with an (101) orientation relative to the surface, which is in accordance with findings by Ohtake et al. [38] reported for FePd films on MgO(111), a very similar system in view

Time-dependent growth of crystalline Au⁰-nanoparticles in cyanobacteria as self-reproducing bioreactors: 2. Anabaena cylindrica

• Liz M. Rösken,
• Felix Cappel,
• Susanne Körsten,
• Christian B. Fischer,
• Andreas Schönleber,
• Sander van Smaalen,
• Stefan Geimer,
• Christian Beresko,
• Georg Ankerhold and
• Stefan Wehner

Beilstein J. Nanotechnol. 2016, 7, 312–327, doi:10.3762/bjnano.7.30

• spectroscopically the emitted element specific plasma light by a fast array spectrometer during the decay of the plasma. The wavelength and the decline of intensity of characteristic emission peaks allow qualitative and sometimes quantitative analysis of the present elements. The method of LIBS is described in more

• are used as a measure of accumulated amount of gold, the second as an internal reference for the semi-quantitative analysis. (b) Amount of gold recorded in dried unwashed biomass of Anabaena cylindrica incubated with an overall concentration of 1 mM (red open squares) resp. 0.1 mM (blue open circles

• element specific characteristic peaks as listed in databases [55]. A quantitative elemental analysis using LIBS spectra is only known for bulk materials and liquids for trace element analysis [52][56][57], but up to now unknown for diluted nanoparticles in a matrix. The herein presented semi quantitative

Single-molecule mechanics of protein-labelled DNA handles

• Vivek S. Jadhav,
• Dorothea Brüggemann,
• Florian Wruck and
• Martin Hegner

Beilstein J. Nanotechnol. 2016, 7, 138–148, doi:10.3762/bjnano.7.16

• microfluidic chamber. Quantitative analysis of labelled and unlabelled DNA. Gel electrophoresis [(1.8% a) (lane 1, 2 and 3) and 1% b) (Lane 4, 5 and 6)]: DHs of 1000 bp (lanes 2) and 4056 bp (lane 5) respectively, versus PDHs (lanes 3, 6) and a 1 kbp ladder [lane 1 (Promega) and lane 4 (NEB)]. In lane 3 some

Effects of electronic coupling and electrostatic potential on charge transport in carbon-based molecular electronic junctions

• Richard L. McCreery

Beilstein J. Nanotechnol. 2016, 7, 32–46, doi:10.3762/bjnano.7.4

• quantitative analysis of the effect, but it does indicate that transport barriers can be significantly perturbed by partial charge transfer. We showed previously that the effect is sufficiently large in carbon MJs with aromatic molecular layers that differences in free molecule HOMO levels caused a small

Nonconservative current-driven dynamics: beyond the nanoscale

• Brian Cunningham,
• Tchavdar N. Todorov and
• Daniel Dundas

Beilstein J. Nanotechnol. 2015, 6, 2140–2147, doi:10.3762/bjnano.6.219

• , this property is the nonequilibrium dynamical response matrix, whose antisymmetric part (induced by the current) describes the NC forces [8][16]. The second advance reported here is the quantitative analysis of this property of long metallic nanoconductors. We show that in long nanowires this

Thermoelectricity in molecular junctions with harmonic and anharmonic modes

• Bijay Kumar Agarwalla,
• Jian-Hua Jiang and
• Dvira Segal

Beilstein J. Nanotechnol. 2015, 6, 2129–2139, doi:10.3762/bjnano.6.218

• temperature T =300 K for the harmonic and anharmonic-mode junctions. In the numerical simulations below the phononic contribution to the thermal conductance is ignored, assuming it to be small compared to its electronic counterpart. A quantitative analysis of the contribution of the phononic thermal

Surface engineering of nanoporous substrate for solid oxide fuel cells with atomic layer-deposited electrolyte

• Sanghoon Ji,
• Waqas Hassan Tanveer,
• Wonjong Yu,
• Sungmin Kang,
• Gu Young Cho,
• Sung Han Kim,
• Jihwan An and
• Suk Won Cha

Beilstein J. Nanotechnol. 2015, 6, 1805–1810, doi:10.3762/bjnano.6.184

• anode side, implies the possibility of TPB formation on the BEC side (Figure 2B). The transmission electron microscopy and energy-dispersive X-ray (TEM-EDX) quantitative analysis result in the middle of the thicker BEC (at dotted asterisk) verified the constituent elements of Pt (78.9%), Zr (6.9%), Y

Atomic force microscopy as analytical tool to study physico-mechanical properties of intestinal cells

• Christa Schimpel,
• Oliver Werzer,
• Eleonore Fröhlich,
• Gerd Leitinger,
• Markus Absenger-Novak,
• Birgit Teubl,
• Andreas Zimmer and
• Eva Roblegg

Beilstein J. Nanotechnol. 2015, 6, 1457–1466, doi:10.3762/bjnano.6.151

• ., high features on the sample cause the cantilever to deflect more) hence, a map of surface topography can be generated [21][22][24]. Moreover, quantitative analysis of the cell elasticity is possible by analyzing force-distance curves via monitoring the response of a cantilever once the tip is pushed

DNA–melamine hybrid molecules: from self-assembly to nanostructures

• Rina Kumari,
• Shib Shankar Banerjee,
• Anil K. Bhowmick and
• Prolay Das

Beilstein J. Nanotechnol. 2015, 6, 1432–1438, doi:10.3762/bjnano.6.148

• -branched counterpart. The poor yield of the former is attributed to steric hindrance offered by the DNA strands as well as the electronic effect that might decrease the nucleophilicity of the amine nitrogen. The yield was calculated by quantitative analysis of the band intensity from the PAGE images. The

Thermal treatment of magnetite nanoparticles

• Beata Kalska-Szostko,
• Urszula Wykowska,
• Dariusz Satula and
• Per Nordblad

Beilstein J. Nanotechnol. 2015, 6, 1385–1396, doi:10.3762/bjnano.6.143

• heating, a quantitative analysis was performed using Scherrer’s equation [32]: where D is the grain size (Å), λ is the wavelength (Mo source, 0.7136 Å), B1/2 is the full width at half maximum intensity of the peak (rad), and θ is the diffraction angle (rad). The calculated results for these particles are

• subspectra. The quantitative analysis suggests that the relative intensity ratio of Fe in these two phases is roughly equal to 4:78:18, respectively, at 500 °C (see Figure 9D). In Figure 9B, the RT spectra of MNP-2 nanoparticles are depicted. There, the spectra transform much more significantly in comparison

PLGA nanoparticles as a platform for vitamin D-based cancer therapy

• Maria J. Ramalho,
• Joana A. Loureiro,
• Bárbara Gomes,
• Manuela F. Frasco,
• Manuel A. N. Coelho and
• M. Carmo Pereira

Beilstein J. Nanotechnol. 2015, 6, 1306–1318, doi:10.3762/bjnano.6.135

• uptake (Figure 3G). As shown in Figure 3H, after 2 h of incubation, the nanoparticles were internalized by A549 cells. It is also possible to observe some colocalization of C6-PLGA NPs with the red-stained late endosomes or lysosomes (yellow color, in Figure 3H). Quantitative analysis with the ImageJ

Growth and morphological analysis of segmented AuAg alloy nanowires created by pulsed electrodeposition in ion-track etched membranes

• Ina Schubert,
• Loic Burr,
• Christina Trautmann and
• Maria Eugenia Toimil-Molares

Beilstein J. Nanotechnol. 2015, 6, 1272–1280, doi:10.3762/bjnano.6.131

• peak of Au. The quantitative analysis reveals for the nanowires deposited at −1.1 V (green line), −0.8 V (black line), and -0.5 V (red line) compositions of about Au60Ag40, Au40Ag60, and Au15Ag85, respectively. This demonstrates that it is possible to vary the AuAg composition in the wires in a

Synthesis, characterization and in vitro effects of 7 nm alloyed silver–gold nanoparticles

• Simon Ristig,
• Svitlana Chernousova,
• Wolfgang Meyer-Zaika and
• Matthias Epple

Beilstein J. Nanotechnol. 2015, 6, 1212–1220, doi:10.3762/bjnano.6.124

• ) was also carried out, but the data were not included because it was impossible to obtain reproducible results. The presence of nanoparticles did not permit a reliable quantitative analysis. Transmission electron micrographs of PVP-functionalized Ag/Au nanoparticles: (A) Ag/Au 10:90, d = 6.5 nm; (B) Ag

Closed-loop conductance scanning tunneling spectroscopy: demonstrating the equivalence to the open-loop alternative

• Chris Hellenthal,
• Kai Sotthewes,
• Martin H. Siekman,
• E. Stefan Kooij and
• Harold J. W. Zandvliet

Beilstein J. Nanotechnol. 2015, 6, 1116–1124, doi:10.3762/bjnano.6.113

• possibilities of (semi-)quantitative analysis offered by scanning tunneling spectroscopy (STS). STS measurements are typically performed in a X(Y) format, where variable Y is actively driven and the response of variable X is measured, with all other system variables being kept constant. Numerous types of STS

• effect of image charges, although the inverse decay length will take a slightly different form: It is directly apparent that a significant image charge effect will have a bending effect on the ln(G)-vs-z curve. However, a quantitative analysis is made difficult by the non-straightforward dependence of κ

• * on ζ. In order to make a quantitative analysis possible, a numerical method will have to be developed. As a starting point, Equation 5 will have to be rewritten to eliminate as many unknown parameters as possible. By taking the the derivative dI/dz, the density of states ρ can be eliminated from the

Experimental determination of the light-trapping-induced absorption enhancement factor in DSSC photoanodes

• Serena Gagliardi and
• Mauro Falconieri

Beilstein J. Nanotechnol. 2015, 6, 886–892, doi:10.3762/bjnano.6.91

• on dye desorption in a basic solution and subsequent spectrophotometric quantitative analysis. The dye content was 1.0 × 10−7 mol/cm2. Calibrated ethanol solutions were also used to obtain values of the spectral molar absorptivity, ε(λ), of the dye. Optical characterization of photoanodes A double

Protein corona – from molecular adsorption to physiological complexity

• Lennart Treuel,
• Dominic Docter,
• Michael Maskos and
• Roland H. Stauber

Beilstein J. Nanotechnol. 2015, 6, 857–873, doi:10.3762/bjnano.6.88

• similar experiments [9][111]. From the quantitative analysis of their data with the Hill equation [111], they revealed an equilibrium constant of KD(HSA) = (6.4 ± 3.6) μM, supporting previous findings for HSA adsorption onto polymer-coated FePt NPs [9][111]. The data from HSAsuc showed a distinctly

Stiffness of sphere–plate contacts at MHz frequencies: dependence on normal load, oscillation amplitude, and ambient medium

• Jana Vlachová,
• Rebekka König and
• Diethelm Johannsmann

Beilstein J. Nanotechnol. 2015, 6, 845–856, doi:10.3762/bjnano.6.87

• for the functions Δf(u0) and ΔΓ(u0). The authors in [10] focused on how the amount of partial slip depends on contact size. For the current work, the sphere size was chosen large enough to always guarantee partial slip. An improved experimental setup allowed for a detailed quantitative analysis in

Statistics of work and orthogonality catastrophe in discrete level systems: an application to fullerene molecules and ultra-cold trapped Fermi gases

• Antonello Sindona,
• Michele Pisarra,
• Mario Gravina,
• Cristian Vacacela Gomez,
• Pierfrancesco Riccardi,
• Giovanni Falcone and
• Francesco Plastina

Beilstein J. Nanotechnol. 2015, 6, 755–766, doi:10.3762/bjnano.6.78

• superimposing Gaussian functions of width 0.15, centered at the occupied/empty energy values. A more quantitative analysis comes from the squared overlaps , some of which are numerically computed and reported in Table 2. In contrast to the C60/ case, we notice that the states involved is the εv,↔εv′, mapping

Electromagnetic enhancement of ordered silver nanorod arrays evaluated by discrete dipole approximation

• Guoke Wei,
• Jinliang Wang and
• Yu Chen

Beilstein J. Nanotechnol. 2015, 6, 686–696, doi:10.3762/bjnano.6.69

• hotspots are found in S0:42 and S0:−42:42. Quantitative analysis shows that the average EFs of S42 and S−42:42 are comparable, which are 797 and 793, respectively, while S0:−42:42 shows the strongest EFavg of 1228, followed by S0:42 with EFavg = 1006. Corners/bends are usually considered to give rise

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

• experimental uncertainties in the quantitative analysis of XPS were assessed in separate experiments with several standard materials and were estimated to be below 7%. This value encompasses the overall uncertainties of the method that are typically introduced by the background subtraction. High resolution Ti

Hematopoietic and mesenchymal stem cells: polymeric nanoparticle uptake and lineage differentiation

• Ivonne Brüstle,
• Thomas Simmet,
• Gerd Ulrich Nienhaus,
• Katharina Landfester and
• Volker Mailänder

Beilstein J. Nanotechnol. 2015, 6, 383–395, doi:10.3762/bjnano.6.38

• IL-8 secretion (Figure 3). The lone PLLA particles also showed no influence on the cytokine secretion. In contrast, the PLLA–Fe particles dramatically increased the IL-8 release while the IL-6 secretion was not altered (Figure 4). For hHSCs, cell functionality was tested by quantitative analysis of