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Search for "positioning" in Full Text gives 142 result(s) in Beilstein Journal of Nanotechnology.

Adsorption and electronic properties of pentacene on thin dielectric decoupling layers

  • Sebastian Koslowski,
  • Daniel Rosenblatt,
  • Alexander Kabakchiev,
  • Klaus Kuhnke,
  • Klaus Kern and
  • Uta Schlickum

Beilstein J. Nanotechnol. 2017, 8, 1388–1395, doi:10.3762/bjnano.8.140

Graphical Abstract
  • resolution, the tip is functionalized with a pentacene molecule, as has been shown for pentacene on NaCl [3] (Figure 4). The functionalization is achieved by positioning a metallic tip over the endpoint of the pentacene molecule. While monitoring the current, the tip is lowered until an abrupt change in the
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Published 06 Jul 2017

Noise in NC-AFM measurements with significant tip–sample interaction

  • Jannis Lübbe,
  • Matthias Temmen,
  • Philipp Rahe and
  • Michael Reichling

Beilstein J. Nanotechnol. 2016, 7, 1885–1904, doi:10.3762/bjnano.7.181

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  • Technology, Inc., Troy, MI, USA) operated at room temperature and employing the beam-deflection method to measure the cantilever displacement. Tip positioning and approach is accomplished by the SPM 100 control system (RHK Technology, Inc.). For this and all other instruments we introduce scaling factors to
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Published 01 Dec 2016

Evolution of the graphite surface in phosphoric acid: an AFM and Raman study

  • Rossella Yivlialin,
  • Luigi Brambilla,
  • Gianlorenzo Bussetti,
  • Matteo Tommasini,
  • Andrea Li Bassi,
  • Carlo Spartaco Casari,
  • Matteo Passoni,
  • Franco Ciccacci,
  • Lamberto Duò and
  • Chiara Castiglioni

Beilstein J. Nanotechnol. 2016, 7, 1878–1884, doi:10.3762/bjnano.7.180

Graphical Abstract
  • activation of the electrochemical process in H3PO4 described in the text. a) Characteristic topography image acquired over the A-region (see text for details), after positioning the AFM tip with the help of a CCD camera. The dotted line highlights the area covered by a rough film. At the bottom of the image
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Published 30 Nov 2016

Dielectrophoresis of gold nanoparticles conjugated to DNA origami structures

  • Anja Henning-Knechtel,
  • Matthew Wiens,
  • Mathias Lakatos,
  • Andreas Heerwig,
  • Frieder Ostermaier,
  • Nora Haufe and
  • Michael Mertig

Beilstein J. Nanotechnol. 2016, 7, 948–956, doi:10.3762/bjnano.7.87

Graphical Abstract
  • conventional top-down fabrication methods in nanotechnology. Their positioning onto specific locations of a microstructured substrate is an important task towards this aim. Here we study manipulation and positioning of pristine and of gold nanoparticle-conjugated tubular DNA origami structures using ac
  • this aim, one important task is the precise positioning and alignment of DNA structures on technically patterned surfaces, e.g., their controlled deposition into microstructured electrode arrays. Recent studies address the alignment of DNA nanostructures to pre-structured surfaces that include (i
  • , the motion of the DNA origami structures, driven by pDEP, is well defined. The gold electrode array was fabricated by photolithography on a glass cover to monitor the motion and positioning of the YOYO®-1 stained 6HB by using fluorescence microscopy. The electrode pairs with the smallest distance of
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Published 01 Jul 2016

Modelling of ‘sub-atomic’ contrast resulting from back-bonding on Si(111)-7×7

  • Adam Sweetman,
  • Samuel P. Jarvis and
  • Mohammad A. Rashid

Beilstein J. Nanotechnol. 2016, 7, 937–945, doi:10.3762/bjnano.7.85

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  • similarity to experimental results, and demonstrate how ‘sub-atomic’ contrast can arise from a flexible tip exploring an asymmetric potential created due to the positioning of the surrounding surface atoms. Keywords: NC-AFM; qPlus; sub-atomic; sub-molecular; Introduction Recent developments in low
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Published 29 Jun 2016

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

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  • original photonic processes. An atomically precise positioning of self-associated molecular dyes can be achieved either in vacuum or at the solution–substrate interface by self-assembly techniques. In particular, perylene-3,4,9,10-tetracarboxylic-3,4,9,10-diimide (PTCDI) and its sibling molecule perylene
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Published 14 Jun 2016

Understanding interferometry for micro-cantilever displacement detection

  • Alexander von Schmidsfeld,
  • Tobias Nörenberg,
  • Matthias Temmen and
  • Michael Reichling

Beilstein J. Nanotechnol. 2016, 7, 841–851, doi:10.3762/bjnano.7.76

Graphical Abstract
  • . For a precise measurement of the cantilever displacement, the relative positioning of fiber and cantilever is of critical importance. We describe a systematic approach for accurate alignment as well as the implications of deficient fiber–cantilever configurations. In the Fabry–Pérot regime, the
  • deflection. To further optimize the signal, we introduce a method for positioning the fiber precisely in the optimal lateral position and examine the importance of this positioning. Finally, we investigate the impact of the interferometric signal on the effective modal spring constant and the modal Q-factor
  • towards the cantilever in steps of 0.4 μm. The actuator is electrically driven by a PMC100 stepper control system (RHK Technology Inc., Troy(MI) USA). The tube piezo, VII, inside the prism allows for positioning the fiber end in x-, y- and z-directions and, specifically, for scanning laterally over an
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Published 10 Jun 2016

Hierarchical coassembly of DNA–triptycene hybrid molecular building blocks and zinc protoporphyrin IX

  • Rina Kumari,
  • Sumit Singh,
  • Mohan Monisha,
  • Sourav Bhowmick,
  • Anindya Roy,
  • Neeladri Das and
  • Prolay Das

Beilstein J. Nanotechnol. 2016, 7, 697–707, doi:10.3762/bjnano.7.62

Graphical Abstract
  • [56]. Hence, the positioning of Zn PpIX in a DNA–TPA scaffold stipulates the study of induced chirality in the above constructed nanostructure. The chirality and conformational changes induced in DNA after conjugation with TPA as well as after the self-assembly and coassembly with Zn PpIX was
  • , tailorability, high efficacy and biological relevancy. Conjugation of TPA with oligomeric DNA results in tuned material property and porosity of the nanostructures. Such methodology offers a new opportunity for the construction of composite nanostructures by the positioning of a guest molecule on DNA–TPA hybrid
  • molecule scaffolds. The structural feature of DNA such as cavities and clefts, and the internal free volume of triptycene molecules may have a significant influence on the positioning and the functional properties of the guest molecules in these composite nanostructures. 20% denaturing PAGE analysis of DNA
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Published 12 May 2016

Contact-free experimental determination of the static flexural spring constant of cantilever sensors using a microfluidic force tool

  • John D. Parkin and
  • Georg Hähner

Beilstein J. Nanotechnol. 2016, 7, 492–500, doi:10.3762/bjnano.7.43

Graphical Abstract
  • distribution. α and β depend on the force distribution and change if the force profile changes, for example, with fluid speed or cantilever positioning. However, Figure 4 and Table 2 demonstrate that there is no dramatic change in the values of both conversion factors (<3%) for any of the cantilevers studied
  • in positioning and reproducibility. The positioning could however be further optimized for example by aligning the cantilever along the channel width (which was ≈1 mm in our experimental setup) such that the flow and hence force is essentially constant over the full cantilever length. This would
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Published 30 Mar 2016

Hydration of magnesia cubes: a helium ion microscopy study

  • Ruth Schwaiger,
  • Johannes Schneider,
  • Gilles R. Bourret and
  • Oliver Diwald

Beilstein J. Nanotechnol. 2016, 7, 302–309, doi:10.3762/bjnano.7.28

Graphical Abstract
  • contact with the indium foil show rounded edges similar as in Figure 1 and Figure 2. The contrast of the cubes in contact with the foil and imaged after the four day period is quite different. Although we took great care in sample positioning, slight variations of working distance and specimen tilt could
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Published 29 Feb 2016

Determination of Young’s modulus of Sb2S3 nanowires by in situ resonance and bending methods

  • Liga Jasulaneca,
  • Raimonds Meija,
  • Alexander I. Livshits,
  • Juris Prikulis,
  • Subhajit Biswas,
  • Justin D. Holmes and
  • Donats Erts

Beilstein J. Nanotechnol. 2016, 7, 278–283, doi:10.3762/bjnano.7.25

Graphical Abstract
  • (SEM Hitachi S4800) for resonance and static bending experiments. The micro stepper-motor was used for rotation of the specimen for exact determination of NW cross-sectional dimensions and for precise positioning of the NW-countering tip system. For mechanical resonance measurements, an AC signal
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Published 19 Feb 2016

Single pyrimidine discrimination during voltage-driven translocation of osmylated oligodeoxynucleotides via the α-hemolysin nanopore

  • Yun Ding and
  • Anastassia Kanavarioti

Beilstein J. Nanotechnol. 2016, 7, 91–101, doi:10.3762/bjnano.7.11

Graphical Abstract
  • are accurate to ±1%, and did not vary with voltage. Evidence for translocation of osmylated oligos via the α-HL pore, despite the apparent bulkiness of the OsBp moiety, was initially surprising. Actually the approximately orthogonal positioning of the nucleobases to the strand axis, and the top or
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Published 22 Jan 2016

Large area scanning probe microscope in ultra-high vacuum demonstrated for electrostatic force measurements on high-voltage devices

  • Urs Gysin,
  • Thilo Glatzel,
  • Thomas Schmölzer,
  • Adolf Schöner,
  • Sergey Reshanov,
  • Holger Bartolf and
  • Ernst Meyer

Beilstein J. Nanotechnol. 2015, 6, 2485–2497, doi:10.3762/bjnano.6.258

Graphical Abstract
  • under UHV condition has the advantage of a high quality factor (Q ≈ 30,000) due to the suppression of viscous damping and therefore increases the force sensitivity by orders of magnitude [27][28]. To analyse complex and large micro-structures a large positioning and scanning unit is necessary, under
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Published 28 Dec 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

Graphical Abstract
  • be confirmed, but a satisfactory solution of the crystallographic data was not possible. Obviously, despite the lower symmetry, still all different orientations of the heterocubane in the crystal lattice were possible, leading to a randomized positioning of Zn–I on symmetry equivalent positions
  • growth. However, the main focus of the current study was to prove the successful incorporation of Cl, and in particular its positioning on the lattice positions of oxygen (ClO•), which leads to n-doping and opens up a perspective to use the materials as potential TCO materials in the future. Although it
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Published 18 Nov 2015

Virtual reality visual feedback for hand-controlled scanning probe microscopy manipulation of single molecules

  • Philipp Leinen,
  • Matthew F. B. Green,
  • Taner Esat,
  • Christian Wagner,
  • F. Stefan Tautz and
  • Ruslan Temirov

Beilstein J. Nanotechnol. 2015, 6, 2148–2153, doi:10.3762/bjnano.6.220

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  • commercial, combined qPlus tuning fork [4] non-contact atomic force/scanning tunnelling microscope (NC-AFM/STM) operated at 5 K under ultra-high vacuum conditions. Each extraction attempt started with positioning the tip over one of the four carboxylic oxygen atoms (marked by red circles in Figure 1) of the
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Published 16 Nov 2015

Development of a novel nanoindentation technique by utilizing a dual-probe AFM system

  • Eyup Cinar,
  • Ferat Sahin and
  • Dalia Yablon

Beilstein J. Nanotechnol. 2015, 6, 2015–2027, doi:10.3762/bjnano.6.205

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  • tuning forks (above 4000 N/m). During nanoindentation of the specimen, the point of contact can be determined with great accuracy as compared to other nanoindentation tools since the positioning of the tuning forks is controlled with phase feedback. This is also an advantage for the experimentally
  • software for the multi-probe AFM system. A detailed system analysis of the multi-probe SPM system is given in [17]. Figure 3 shows the positioning of multi-probe system. There are four towers and a sample piezo scanner stage which is positioned in the middle. Each tower can be operated independently. The
  • signal, at which point the stepper motion stops. Subsequently, the lower scanner is retracted by a safe distance amount (≈3 μm). After this, with the help of the fine movement capability of the piezo scanner, the sample is brought up automatically to ensure a very accurate contact positioning and a safe
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Published 12 Oct 2015

A simple method for the determination of qPlus sensor spring constants

  • John Melcher,
  • Julian Stirling and
  • Gordon A. Shaw

Beilstein J. Nanotechnol. 2015, 6, 1733–1742, doi:10.3762/bjnano.6.177

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  • ) uncertainty, which we estimate from the regression, and Type B (non-statistical) uncertainty, which includes (i) 1% uncertainty in the calibration of both force and indention of the nanoindenter and (ii) ±5 μm uncertainty in the positioning the indenter tip with respect to the distal edge of the tine. The
  • which are estimated to have 1% relative standard uncertainties, denoted and , respectively. Finally, we estimate a ±5 μm uncertainty in the positioning of the indenter tip with respect to the distal edge, which we denote UE. Relative uncertainty estimates are summarised in Table 3. Let u refer to the
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Published 14 Aug 2015

In situ SU-8 silver nanocomposites

  • Søren V. Fischer,
  • Basil Uthuppu and
  • Mogens H. Jakobsen

Beilstein J. Nanotechnol. 2015, 6, 1661–1665, doi:10.3762/bjnano.6.168

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  • optical imaging, optoelectronics and electrochemistry to catalysts [2]. However, it is difficult to use such NPs in conjunction with standard top down micro- and nanofabrication processes as positioning and control of the nanoparticles are impossible to maintain [3]. Homogeneous polymeric thin film metal
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Published 30 Jul 2015

Possibilities and limitations of advanced transmission electron microscopy for carbon-based nanomaterials

  • Xiaoxing Ke,
  • Carla Bittencourt and
  • Gustaaf Van Tendeloo

Beilstein J. Nanotechnol. 2015, 6, 1541–1557, doi:10.3762/bjnano.6.158

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  • . Nevertheless, the delocalization can be used to carry out “remote” spectroscopy by positioning the electron beam outside the sample and virtually “probe” the material, as demonstrated on vibrational spectroscopy acquired from various materials, both hard and soft [31]. Radiation damage can therefore be avoided
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Published 16 Jul 2015

Molecular materials – towards quantum properties

  • Mario Ruben

Beilstein J. Nanotechnol. 2015, 6, 1485–1486, doi:10.3762/bjnano.6.153

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  • same token, the needed surface attachment and positioning of molecular materials by self-assembly techniques is addressed – an important prerequisite for the electrical addressing of molecules by lateral graphene electrodes or vertical scanning tunnelling microscopy set-ups or e-beam lithographed gold
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Published 08 Jul 2015

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

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  • an attractive molecular scaffold for the precise positioning of different molecules on the nanoscale [3][4]. DNA has been used to create nanostructures through hybridization-mediated self-assembly for molecular electronics and sensing applications [5][6][7]. DNA–organic hybrid structures have
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Published 30 Jun 2015

The Kirkendall effect and nanoscience: hollow nanospheres and nanotubes

  • Abdel-Aziz El Mel,
  • Ryusuke Nakamura and
  • Carla Bittencourt

Beilstein J. Nanotechnol. 2015, 6, 1348–1361, doi:10.3762/bjnano.6.139

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  • core and the metal oxide shell is another factor that can amplify the formation of a bamboo-like structure. Güder et al. reported on a new approach based on stress engineering to control the spatial positioning and distribution of Kirkendall voids in ZnO/Al2O3 core–shell nanowires [72]. In this study
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Published 18 Jun 2015

Influence of the shape and surface oxidation in the magnetization reversal of thin iron nanowires grown by focused electron beam induced deposition

  • Luis A. Rodríguez,
  • Lorenz Deen,
  • Rosa Córdoba,
  • César Magén,
  • Etienne Snoeck,
  • Bert Koopmans and
  • José M. De Teresa

Beilstein J. Nanotechnol. 2015, 6, 1319–1331, doi:10.3762/bjnano.6.136

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  • raster mode to detect MOKE contrasts via the variation of the signal amplitude or the change in the rotation angle of the light. The positioning of the beam permits the localization of the nanostructure to be measured and to position the beam in a targeted place. For measurements as a function of the
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Published 15 Jun 2015

Nano-contact microscopy of supracrystals

  • Adam Sweetman,
  • Nicolas Goubet,
  • Ioannis Lekkas,
  • Marie Paule Pileni and
  • Philip Moriarty

Beilstein J. Nanotechnol. 2015, 6, 1229–1236, doi:10.3762/bjnano.6.126

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  • measurement. Simultaneous Δf (A) and It (B) data acquired over a single nanocrystal with an applied bias of Vgap = +2 V. Note the absolute z positioning is identical to that used in Figure 2. Inset: Tunnel current map for an individual nanocrystal acquired immediately after the constant height DFM images
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Published 29 May 2015

Capillary and van der Waals interactions on CaF2 crystals from amplitude modulation AFM force reconstruction profiles under ambient conditions

  • Annalisa Calò,
  • Oriol Vidal Robles,
  • Sergio Santos and
  • Albert Verdaguer

Beilstein J. Nanotechnol. 2015, 6, 809–819, doi:10.3762/bjnano.6.84

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  • environmental control in the MFP-3D microscope and circulating dry nitrogen for 30 min after positioning the AFM head on top of the sample. Then the nitrogen flow was suspended and the cantilevers k, f0 and Q calibrated. AFM images of 2 × 2 µm2 were recorded before collecting APD curves in order to verify that
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Published 25 Mar 2015
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