Green preparation and spectroscopic characterization of plasmonic silver nanoparticles using fruits as reducing agents

• Jes Ærøe Hyllested,
• Marta Espina Palanco,
• Nicolai Hagen,
• Klaus Bo Mogensen and
• Katrin Kneipp

Beilstein J. Nanotechnol. 2015, 6, 293–299, doi:10.3762/bjnano.6.27

• extract/AgNO3 solution between 5 and 65 minutes after mixing and after 1 month (a) and of ≈1:50 pineapple extract/AgNO3 solution between 2 and 30 minutes after mixing (c). The arrows guide the eye between the peaks of the spectra. (b) and (d) show SEM images of typical nanoparticles prepared by using

Caveolin-1 and CDC42 mediated endocytosis of silica-coated iron oxide nanoparticles in HeLa cells

• Nils Bohmer and
• Andreas Jordan

Beilstein J. Nanotechnol. 2015, 6, 167–176, doi:10.3762/bjnano.6.16

• reduced endocytosis of PEGylated SPIONs by 46% (Figure 9). This effect was highly significant and visible by eye before quantitative iron analysis because of the light-colored cell pellet. The important role of CDC42 is also interesting in the context of the observed effect of Caveolin-1, because it was

Spectroscopic mapping and selective electronic tuning of molecular orbitals in phosphorescent organometallic complexes – a new strategy for OLED materials

• Pascal R. Ewen,
• Jan Sanning,
• Tobias Koch,
• Nikos L. Doltsinis,
• Cristian A. Strassert and
• Daniel Wegner

Beilstein J. Nanotechnol. 2014, 5, 2248–2258, doi:10.3762/bjnano.5.234

• to the eye for the comparison of theory and experiment, we have schematically depicted the energetic visibility range of the described dI/dV features as Lorentzian peaks in Figure 3b that can be considered as (qualitative and schematic) experimental LDOS vs energy plots. The arrows between Figure 3a

Properties of plasmonic arrays produced by pulsed-laser nanostructuring of thin Au films

• Katarzyna Grochowska,
• Katarzyna Siuzdak,
• Peter A. Atanasov,
• Carla Bittencourt,
• Anna Dikovska,
• Nikolay N. Nedyalkov and
• Gerard Śliwiński

Beilstein J. Nanotechnol. 2014, 5, 2102–2112, doi:10.3762/bjnano.5.219

• from 10–30 nm thick films (circles) and data from [45] are given for comparison (triangles); the dashed line is a guide for the eye. Near-field intensity distributions in the vicinity of Au nanoarrays on SiO2 glass: a) scheme of the structure geometry adopted from the SEM image in Figure 1a inset

Effect of channel length on the electrical response of carbon nanotube field-effect transistors to deoxyribonucleic acid hybridization

• Hari Krishna Salila Vijayalal Mohan,
• Jianing An,
• Yani Zhang,
• Chee How Wong and
• Lianxi Zheng

Beilstein J. Nanotechnol. 2014, 5, 2081–2091, doi:10.3762/bjnano.5.217

• solid lines are a guide to the eye. The variation in (a) Δφ and (b) K with L in the linear and near-threshold regimes for the forward sweep. The solid lines are a guide to the eye. Supporting Information The Supporting Information contains 1) ID–VDS and ID–VG plots of different functionalization steps

Optical properties and electrical transport of thin films of terbium(III) bis(phthalocyanine) on cobalt

• Peter Robaschik,
• Pablo F. Siles,
• Daniel Bülz,
• Peter Richter,
• Manuel Monecke,
• Michael Fronk,
• Svetlana Klyatskaya,
• Daniel Grimm,
• Oliver G. Schmidt,
• Mario Ruben,
• Dietrich R. T. Zahn and
• Georgeta Salvan

Beilstein J. Nanotechnol. 2014, 5, 2070–2078, doi:10.3762/bjnano.5.215

• the organic film thickness. Dotted lines are guide to the eye to show the tendency of the grain height and grain diameter with the thickness. The inset shows the dependence of the roughness of the organic films thickness. (b) Diameter and height histograms for an 87 nm TbPc2 film. Error bars (with

Data-adaptive image-denoising for detecting and quantifying nanoparticle entry in mucosal tissues through intravital 2-photon microscopy

• Torsten Bölke,
• Lisa Krapf,
• Regina Orzekowsky-Schroeder,
• Tobias Vossmeyer,
• Jelena Dimitrijevic,
• Horst Weller,
• Anna Schüth,
• Antje Klinger,
• Gereon Hüttmann and
• Andreas Gebert

Beilstein J. Nanotechnol. 2014, 5, 2016–2025, doi:10.3762/bjnano.5.210

• native color perception of the human eye. a) Anaesthetized Balb/c mouse on a homeothermic table with an exteriorized ileal loop. b) Schematic diagram of the chamber for intravital 2PM imaging. Supporting Information Supporting Information File 116: Additional experimental data. Acknowledgements The

The surface properties of nanoparticles determine the agglomeration state and the size of the particles under physiological conditions

• Christoph Bantz,
• Olga Koshkina,
• Thomas Lang,
• Hans-Joachim Galla,
• C. James Kirkpatrick,
• Roland H. Stauber and
• Michael Maskos

Beilstein J. Nanotechnol. 2014, 5, 1774–1786, doi:10.3762/bjnano.5.188

• proteins, the precipitation could not be observed by eye. Thus, the samples were filtrated after mixing and measured with DLS. The resulting hydrodynamic radius was 130 nm for the non-quaternized sample POS-NH2 and approximately 200 nm for the quaternized samples POS-NH2Q1 and POS-NH2Q2. In Table 1 these

The influence of molecular mobility on the properties of networks of gold nanoparticles and organic ligands

• Edwin J. Devid,
• Paulo N. Martinho,
• M. Venkata Kamalakar,
• Úna Prendergast,
• Christian Kübel,
• Tibebe Lemma,
• Jean-François Dayen,
• Tia. E. Keyes,
• Bernard Doudin,
• Mario Ruben and
• Sense Jan van der Molen

Beilstein J. Nanotechnol. 2014, 5, 1664–1674, doi:10.3762/bjnano.5.177

• lines are parallel guides to the eye to compare the slope of various networks. Fabrication of 2D Au-NP–S-BPP array (not to scale). The ingredients are gold nanoparticles (diameter 8.5 ± 1.5 nm) and SAc-BPP molecules (length of the molecule 1.3 nm, without the acetyl (Ac) group). The arrays are

Multi-frequency tapping-mode atomic force microscopy beyond three eigenmodes in ambient air

• Santiago D. Solares,
• Sangmin An and
• Christian J. Long

Beilstein J. Nanotechnol. 2014, 5, 1637–1648, doi:10.3762/bjnano.5.175

• eye. There is a reduction in the amplitude of the second eigenmode (red traces), which is more significant for smaller free oscillation amplitudes, but it is not excessive in any of the cases considered. Some minor irregularity is observed from one oscillation of the second eigenmode to the next one

Probing the electronic transport on the reconstructed Au/Ge(001) surface

• Franciszek Krok,
• Mark R. Kaspers,
• Alexander M. Bernhart,
• Marek Nikiel,
• Benedykt R. Jany,
• Paulina Indyka,
• Mateusz Wojtaszek,
• Rolf Möller and
• Christian A. Bobisch

Beilstein J. Nanotechnol. 2014, 5, 1463–1471, doi:10.3762/bjnano.5.159

• similar dark contrast as the gold cluster is also observed. This layer is extending from the cluster at both sides and is found about 2 nm below the apparent sample surface [21]. As a guide to the eye the apparent sample surface is marked by the black arrows in Figure 4a and determines the position where

• point contact underneath the cluster (Figure 6a) is active, a sharp transition similar to the findings in our potentiometry data is found. As a guide to the eye, equipotential lines are plotted which show the impact of the cluster on the potential in its vicinity. Our potentiometry data correspond quite

• at their borders. c) Line profiles of the topography (red) and potential (green) as marked in a) and b). As a guide to the eye a linear function was fitted to the overall gradient of the potential. d) Potential near a Au cluster. Sharp transitions of the potential at the perimeter of the cluster are

Influence of the PDMS substrate stiffness on the adhesion of Acanthamoeba castellanii

• Sören B. Gutekunst,
• Carsten Grabosch,
• Alexander Kovalev,
• Stanislav N. Gorb and
• Christine Selhuber-Unkel

Beilstein J. Nanotechnol. 2014, 5, 1393–1398, doi:10.3762/bjnano.5.152

• in the human body are the eye and the brain, i.e., very soft environments. Thus, our study provides first hints towards the relevance of mechanical aspects for the pathogenicity of eukaryotic parasites. Keywords: acanthamoeba; cell adhesion; elastic substrates; mechanosensing; silicones

• adhere to comparably soft microenvironments in the brain and in the eye. Interestingly, there is no significant difference in the morphology of A. castellanii between PDMS substrates and the positive control substrate. This shows that A. castellanii trophozoites can adhere very well to PDMS without the

• cell adhesion areas for substrates having different Young’s moduli supports the results from Figure 1 and Figure 2, i.e., that substrate stiffness influences cell adhesion area. The difference between the control sample and the PDMS sample with Young’s modulus 128 kPa is eye-catching here, but

Adsorption and oxidation of formaldehyde on a polycrystalline Pt film electrode: An in situ IR spectroscopy search for adsorbed reaction intermediates

• Zenonas Jusys and
• R. Jürgen Behm

Beilstein J. Nanotechnol. 2014, 5, 747–759, doi:10.3762/bjnano.5.87

• included to guide the eye. Supporting Information Supporting Information File 8: CO adsorption transients and ATR-FTIR spectra at different potentials. Acknowledgements Financial support by Deutsche Forschungsgemeinschaft (Research Unit FOR 1376, project JU 2781/2-1) is gratefully acknowledged.

The surface microstructure of cusps and leaflets in rabbit and mouse heart valves

• Xia Ye,
• Bharat Bhushan,
• Ming Zhou and
• Weining Lei

Beilstein J. Nanotechnol. 2014, 5, 622–629, doi:10.3762/bjnano.5.73

• smooth to the naked eye, they are actually comprised of a double hierarchical structure consisting of a cobblestone-like microstructure and nano-cilia along with mastoids with a directional arrangement. Such nanostructures could play a very important role in the hemocompatibility characteristics of heart

• microstructures of the water skipper’s leg, the moth’s eye, shark skin, the darkling beetle, and the cicada’s wing [6][7][8][9][10][11][12][13][14][15]. At the same time, the relationship between superhydrophobicity and surface microstructures attracted strong interest. A large number of surfaces with all kinds

Single-asperity contact mechanics with positive and negative work of adhesion: Influence of finite-range interactions and a continuum description for the squeeze-out of wetting fluids

• Martin H. Müser

Beilstein J. Nanotechnol. 2014, 5, 419–437, doi:10.3762/bjnano.5.50

• function ac,T takes its minimum value. Therefore, it is most meaningful to normalize the force with ΔγR, unless, of course, Δγ = 0. The approach is validated in Figure 3. It shows the spatial dependence of the gap for two different parameterizations. Small deviations, which are not visible to the naked eye

Adsorption of the ionic liquid [BMP][TFSA] on Au(111) and Ag(111): substrate effects on the structure formation investigated by STM

• Benedikt Uhl,
• Florian Buchner,
• Dorothea Alwast,
• Nadja Wagner and
• R. Jürgen Behm

Beilstein J. Nanotechnol. 2013, 4, 903–918, doi:10.3762/bjnano.4.102

• this image, the zig-zag line pairs of the herringbone reconstruction are clearly visible through the adlayer, they are marked in Figure 5a with white lines in the upper right part to guide the eye. Note that for the 2D glass phase the reconstruction could not be resolved. In Figure 4a and 4b, the

3D nano-structures for laser nano-manipulation

• Gediminas Seniutinas,
• Lorenzo Rosa,
• Gediminas Gervinskas,
• Etienne Brasselet and
• Saulius Juodkazis

Beilstein J. Nanotechnol. 2013, 4, 534–541, doi:10.3762/bjnano.4.62

• indicated by the red markers, the blue lines are guides to the eye. Acknowledgements Part of this work was performed on the swinSTAR supercomputer at Swinburne University of Technology. Author contributions listed: E. B. and S. J. originated the idea and L. R. implemented the numerical models; G. G. and G

Femtosecond-resolved ablation dynamics of Si in the near field of a small dielectric particle

• Paul Kühler,
• Daniel Puerto,
• Mario Mosbacher,
• Paul Leiderer,
• Francisco Javier Garcia de Abajo,
• Jan Siegel and
• Javier Solis

Beilstein J. Nanotechnol. 2013, 4, 501–509, doi:10.3762/bjnano.4.59

• characteristic events is indicated by arrows. RL indicates the relative reflectivity at 400 nm (1.48) of an optically thick molten liquid layer. The line is a guide to the eye. (a) Calculated near field distribution at the surface of a Si substrate for a SiO2 dielectric particle of 7.9 μm diameter homogenously

Synthesis and thermoelectric properties of Re₃As_6.6In_0.4 with Ir₃Ge₇ crystal structure

• Valeriy Y. Verchenko,
• Anton S. Vasiliev,
• Alexander A. Tsirlin,
• Vladimir A. Kulbachinskii,
• Vladimir G. Kytin and
• Andrei V. Shevelkov

Beilstein J. Nanotechnol. 2013, 4, 446–452, doi:10.3762/bjnano.4.52

• properties of the S1 sample as a function of temperature. Solid lines are drawn to guide the eye. Crystallographic data from the powder diffraction experiment for S1. Atomic coordinates and displacement parameters for S1. Selected interatomic distances for S1. Re3As7 crystallographic data used for electronic

Grain boundaries and coincidence site lattices in the corneal nanonipple structure of the Mourning Cloak butterfly

• Ken C. Lee and
• Uwe Erb

Beilstein J. Nanotechnol. 2013, 4, 292–299, doi:10.3762/bjnano.4.32

• materials is made and the importance of such arrangements in terms of nipple packing density, corneal lens curvature and potential optical properties is discussed. Keywords: butterfly-eye structure; coordination defects; sigma grain boundaries; Introduction The structure of moth and butterfly eyes consist

• of many repeating unit cells referred to as ommatidia. Thousands of ommatidia are closely packed together and typically form a nearly spherical or semispherical compound eye with the well-known surface facet structure [1]. Each ommatidium is composed of a corneal lens, a crystalline cone, a rhabdom

• reduce the reflection of light from the surface of the eye, due to the gradient in the refractive index in the near surface region. This is important for nocturnal insects such as moths, because it gives a better low-light vision (moth-eye effect). The reduced light reflection also provides an antiglare

Plasticity of Cu nanoparticles: Dislocation-dendrite-induced strain hardening and a limit for displacive plasticity

• Antti Tolvanen and
• Karsten Albe

Beilstein J. Nanotechnol. 2013, 4, 173–179, doi:10.3762/bjnano.4.17

• (here lower right about the orifice) interacts with the partials in the dendrite pinned to the surface, resulting in a slip. Hydrostatic pressure and von Mises stress at the onset of plasticity versus extrusion orifice radius. Lines are guides for the eye. Extrusion from a 11 Å orifice. Hydrostatic

Pure hydrogen low-temperature plasma exposure of HOPG and graphene: Graphane formation?

• Baran Eren,
• Dorothée Hug,
• Laurent Marot,
• Rémy Pawlak,
• Marcin Kisiel,
• Roland Steiner,
• Dominik M. Zumbühl and
• Ernst Meyer

Beilstein J. Nanotechnol. 2012, 3, 852–859, doi:10.3762/bjnano.3.96

• min of exposure and after an annealing at 450 °C were used to monitor the transformation from graphene to hydrogenated graphene. In (b), the positions of the σ peaks and the eye-guides for the Ef, the secondary electrons, and the π→π* transition are provided. (a) STM images of the HOPG after 5 min of

Tuning the properties of magnetic thin films by interaction with periodic nanostructures

• Ulf Wiedwald,
• Felix Haering,
• Stefan Nau,
• Carsten Schulze,
• Herbert Schletter,
• Denys Makarov,
• Alfred Plettl,
• Karsten Kuepper,
• Manfred Albrecht,
• Johannes Boneberg and
• Paul Ziemann

Beilstein J. Nanotechnol. 2012, 3, 831–842, doi:10.3762/bjnano.3.93

• taken in the in-plane geometry at ambient temperature. Panel (b) shows the experimental coercive field as a function of Fe layer thickness t for different diameters d of PS spheres at a distance a = 95 nm. Dotted lines are guides to the eye. In (c) HC is presented as a function of d at a = 95 nm for two

The morphology of silver nanoparticles prepared by enzyme-induced reduction

• Henrik Schneidewind,
• Thomas Schüler,
• Katharina K. Strelau,
• Karina Weber,
• Dana Cialla,
• Marco Diegel,
• Roland Mattheis,
• Andreas Berger,
• Robert Möller and
• Jürgen Popp

Beilstein J. Nanotechnol. 2012, 3, 404–414, doi:10.3762/bjnano.3.47

• on the chosen axis scale. The curves are only a guide for the eye. Please note the differently scaled ordinates. High-resolution TEM image of a silver nanoparticle grown by enzymatic synthesis. The right part shows a detail at higher magnification with clearly observable crystallographic planes of

• dependence on the DNA concentration, determined by means of RBS measurements. The reaction time was always 5 min. The lines are only a guide for the eye. (a) A typical SERS spectrum of riboflavin (5 µM) on enzymatically generated silver nanoparticles measured for an excitation wavelength of 532 nm and (b

Ultraviolet photodetection of flexible ZnO nanowire sheets in polydimethylsiloxane polymer

• Jinzhang Liu,
• Nunzio Motta and
• Soonil Lee

Beilstein J. Nanotechnol. 2012, 3, 353–359, doi:10.3762/bjnano.3.41

• . With PDMS (refractive index ≈ 1.5) filling the interspaces between nanowires, the paper-like ZnO nanowire film becomes more translucent to the naked eye, facilitating UV-light scattering to a deeper level in the nanowire sheet. Therefore more nanowires will receive UV photons, leading to the enhanced