Search results

Search for "surface properties" in Full Text gives 192 result(s) in Beilstein Journal of Nanotechnology.

Inorganic Janus particles for biomedical applications

  • Isabel Schick,
  • Steffen Lorenz,
  • Dominik Gehrig,
  • Stefan Tenzer,
  • Wiebke Storck,
  • Karl Fischer,
  • Dennis Strand,
  • Frédéric Laquai and
  • Wolfgang Tremel

Beilstein J. Nanotechnol. 2014, 5, 2346–2362, doi:10.3762/bjnano.5.244

Graphical Abstract
  • , synthesis, and properties of multifunctional nanoparticles owing to their special structure–property relationship [1]. Due to their distinct surface properties, these nanomaterials can be modified by various ligands to introduce the desired surface characteristics ranging from solubility in selected
PDF
Album
Review
Published 05 Dec 2014

Advanced atomic force microscopy techniques II

  • Thilo Glatzel,
  • Ricardo Garcia and
  • Thomas Schimmel

Beilstein J. Nanotechnol. 2014, 5, 2326–2327, doi:10.3762/bjnano.5.241

Graphical Abstract
  • and clearly shows a route for development for the next years. All of the new applications and experiments are strongly dependent on theoretical and technical developments. Virtual AFMs used to simulate AFM measurements [18][19][20] and to deconvolute complex correlations between various surface
  • properties [21] are based on the implementation of proportional-integral controllers to give realistic feedback behaviours. Stirling proposed a theoretical model for studying the SPM feedback in the context of control theory providing the possibility to understand and model the performance from SPM systems
PDF
Editorial
Published 03 Dec 2014

Nanoencapsulation of ultra-small superparamagnetic particles of iron oxide into human serum albumin nanoparticles

  • Matthias G. Wacker,
  • Mahmut Altinok,
  • Stephan Urfels and
  • Johann Bauer

Beilstein J. Nanotechnol. 2014, 5, 2259–2266, doi:10.3762/bjnano.5.235

Graphical Abstract
  • charged core particles were embedded into the HSA matrix by ethanolic desolvation of the protein [9]. By adjusting the reaction conditions of the desolvation procedure, particles of optimal size distribution and surface properties for drug targeting applications have been achieved. The USPIO load
PDF
Album
Full Research Paper
Published 27 Nov 2014

Influence of stabilising agents and pH on the size of SnO2 nanoparticles

  • Olga Rac,
  • Patrycja Suchorska-Woźniak,
  • Marta Fiedot and
  • Helena Teterycz

Beilstein J. Nanotechnol. 2014, 5, 2192–2201, doi:10.3762/bjnano.5.228

Graphical Abstract
  • stabilising agents significantly affect the size, shape and surface properties of nanomaterials synthesised in their presence [18]. In 1718, Helcher applied a natural polymer (starch) to stabilise gold nanoparticles [19]. Today, synthetic polymers are commonly used to stabilise different types of
PDF
Album
Full Research Paper
Published 20 Nov 2014

Rapid degradation of zinc oxide nanoparticles by phosphate ions

  • Rudolf Herrmann,
  • F. Javier García-García and
  • Armin Reller

Beilstein J. Nanotechnol. 2014, 5, 2007–2015, doi:10.3762/bjnano.5.209

Graphical Abstract
  • solubility. The morphology of the zinc oxide particles has only a minor influence on the kinetics of this reaction. Surface properties related to different production methods and the presence and absence of labelling with a perylene fluorescent dye are more important. Particles prepared under acidic
PDF
Album
Full Research Paper
Published 05 Nov 2014

Silicon and germanium nanocrystals: properties and characterization

  • Ivana Capan,
  • Alexandra Carvalho and
  • José Coutinho

Beilstein J. Nanotechnol. 2014, 5, 1787–1794, doi:10.3762/bjnano.5.189

Graphical Abstract
  • not a shallow acceptor, but rather a deep acceptor with levels that can edge the conduction band minimum of the Si NC film. In fact, this dopant was used to increase the conductivity of the films by more than two orders of magnitude, although the majority carriers were electrons. III.2.3 Surface
  • properties: The NC surface is one of the most important variables in the engineering of its shape, intrinsic properties and stability in air and interaction with solvents and other substances. For nanoparticles with a clean surface or with a hydrogen-covered surface, the orientation dependence of the surface
PDF
Album
Review
Published 16 Oct 2014

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

Graphical Abstract
  • applied. The investigated particle systems were (i) negatively charged silica particles and (ii) poly(organosiloxane) particles offering variable surface modification opportunities (positively charged, polymer coated). It is shown that the surface properties primarily determine the agglomeration state of
  • the particles and therefore their effective size, especially under physiological conditions. Thus, the biological identity of a nanomaterial is clearly influenced by differentiating surface properties. Keywords: nanomaterial characterization; physiological conditions; surface properties; silica
  • hydrodynamic radius was observed. The distinctly higher μ2 values of 0.29 and 0.27 for the quaternized samples are presumably caused by a minor fraction of agglomerates. Agglomeration might be induced here by the change of the surface properties during the quaternization procedure. Thus, the higher μ2 values
PDF
Album
Full Research Paper
Published 15 Oct 2014

Controlling the dispersion of supported polyoxometalate heterogeneous catalysts: impact of hybridization and the role of hydrophilicity–hydrophobicity balance and supramolecularity

  • Gijo Raj,
  • Colas Swalus,
  • Eglantine Arendt,
  • Pierre Eloy,
  • Michel Devillers and
  • Eric M. Gaigneaux

Beilstein J. Nanotechnol. 2014, 5, 1749–1759, doi:10.3762/bjnano.5.185

Graphical Abstract
  • surface, the alkyl chains of DODA are known to orient with a tilt angle of θ ≈ 30° with respect to the normal of the surface [30]. As expected, no epitaxial arrangement of DODA was observed. The conformation of the DODA surfactant, as shown here, can thus be tuned as a function of the surface properties
PDF
Album
Supp Info
Full Research Paper
Published 10 Oct 2014

In vitro and in vivo interactions of selected nanoparticles with rodent serum proteins and their consequences in biokinetics

  • Wolfgang G. Kreyling,
  • Stefanie Fertsch-Gapp,
  • Martin Schäffler,
  • Blair D. Johnston,
  • Nadine Haberl,
  • Christian Pfeiffer,
  • Jörg Diendorf,
  • Carsten Schleh,
  • Stephanie Hirn,
  • Manuela Semmler-Behnke,
  • Matthias Epple and
  • Wolfgang J. Parak

Beilstein J. Nanotechnol. 2014, 5, 1699–1711, doi:10.3762/bjnano.5.180

Graphical Abstract
  • discrepancy suggests that the Ag dissociation during aging of the AgNP suspension is more complex than just forming Ag+ ions. Conclusion Upon contact with body fluids such as blood serum NP bind soluble proteins according to their physicochemical surface properties and the protein affinity and/or the
PDF
Album
Review
Published 02 Oct 2014
Graphical Abstract
  • observables and calculated quantities from the AFM measurement (frequency, phase, amplitude, quality factor, etc.) to the surface properties. In contact resonance typically the Kelvin–Voigt model [40] is used, which consists of a linear spring in parallel with a damper (dashpot). It is incorporated into the
PDF
Album
Full Research Paper
Published 26 Sep 2014

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

Graphical Abstract
  • accurately for multimodal imaging, it may not be possible to carry out fully quantitative measurements of the surface properties. As already discussed, the tip trajectories for a tetramodal or pentamodal operation are even more complex than the already complex bimodal [19] and trimodal [20] trajectories
  • for different free amplitudes and sample parameters; (f) second eigenmode spectra for different free amplitudes. The surface properties were accounted for through a standard linear solid model (see methods section) with K0 = 7.5 N/m, Kinf = 7.5 N/m and Cd = 1 × 10−5 N·s/m for the “soft” sample and K0
PDF
Album
Full Research Paper
Published 25 Sep 2014

In vitro interaction of colloidal nanoparticles with mammalian cells: What have we learned thus far?

  • Moritz Nazarenus,
  • Qian Zhang,
  • Mahmoud G. Soliman,
  • Pablo del Pino,
  • Beatriz Pelaz,
  • Susana Carregal-Romero,
  • Joanna Rejman,
  • Barbara Rothen-Rutishauser,
  • Martin J. D. Clift,
  • Reinhard Zellner,
  • G. Ulrich Nienhaus,
  • James B. Delehanty,
  • Igor L. Medintz and
  • Wolfgang J. Parak

Beilstein J. Nanotechnol. 2014, 5, 1477–1490, doi:10.3762/bjnano.5.161

Graphical Abstract
  • cores are always surrounded by an organic coating [14]. Adsorbed proteins can significantly alter the surface properties of NPs and are of key importance in defining the biological identity of NPs [132][133]. The corona formed around NPs is what the cell will “see” primarily, though certainly also the
PDF
Album
Review
Published 09 Sep 2014

Physical principles of fluid-mediated insect attachment - Shouldn’t insects slip?

  • Jan-Henning Dirks

Beilstein J. Nanotechnol. 2014, 5, 1160–1166, doi:10.3762/bjnano.5.127

Graphical Abstract
  • between the adhesive pad and the substrate [61]. The classic hydrodynamic model only describes the friction observed with relatively “thick” layers of lubricant (≥0.5 μm, [62]), where neither the specific surface properties (roughness, surface energy) nor Amonton’s law are involved [63]. Friction forces
PDF
Album
Video
Review
Published 28 Jul 2014

Trade-offs in sensitivity and sampling depth in bimodal atomic force microscopy and comparison to the trimodal case

  • Babak Eslami,
  • Daniel Ebeling and
  • Santiago D. Solares

Beilstein J. Nanotechnol. 2014, 5, 1144–1151, doi:10.3762/bjnano.5.125

Graphical Abstract
  • cases. Finally, we also offer a comparison to the trimodal method [9]. Note that in this paper we use the word sensitivity to qualitatively describe the ability of an eigenmode observable (e.g., phase shift) to detect small changes in the tip–sample forces, which in turn are governed by the surface
  • properties. Since much of the discussion is based on the cantilever dynamics, the term can also be understood as the ability of a given cantilever eigenmode to be perturbed by small changes in the external forces when it is oscillating under the specified parameters. Our discussion and conclusions are based
PDF
Album
Full Research Paper
Published 24 Jul 2014

The study of surface wetting, nanobubbles and boundary slip with an applied voltage: A review

  • Yunlu Pan,
  • Bharat Bhushan and
  • Xuezeng Zhao

Beilstein J. Nanotechnol. 2014, 5, 1042–1065, doi:10.3762/bjnano.5.117

Graphical Abstract
  • ]. It is also believed that the surface charge density has a relationship with nanobubbles and boundary slip [59][63]. Generally speaking, with an applied voltage, the surface properties and the interaction of the surface and liquid will be affected. In particular, the wettability, surface charge
PDF
Album
Review
Published 15 Jul 2014

A nanometric cushion for enhancing scratch and wear resistance of hard films

  • Katya Gotlib-Vainshtein,
  • Olga Girshevitz,
  • Chaim N. Sukenik,
  • David Barlam and
  • Sidney R. Cohen

Beilstein J. Nanotechnol. 2014, 5, 1005–1015, doi:10.3762/bjnano.5.114

Graphical Abstract
  • of intense technological interest. The capability to modulate these surface properties while preserving both the bulk properties of the materials and a well-defined, constant chemical composition of the surface is particularly attractive. We report herein the use of a soft, flexible underlayer to
PDF
Album
Full Research Paper
Published 10 Jul 2014

Injection of ligand-free gold and silver nanoparticles into murine embryos does not impact pre-implantation development

  • Ulrike Taylor,
  • Wiebke Garrels,
  • Annette Barchanski,
  • Svea Peterson,
  • Laszlo Sajti,
  • Andrea Lucas-Hahn,
  • Lisa Gamrad,
  • Ulrich Baulain,
  • Sabine Klein,
  • Wilfried A. Kues,
  • Stephan Barcikowski and
  • Detlef Rath

Beilstein J. Nanotechnol. 2014, 5, 677–688, doi:10.3762/bjnano.5.80

Graphical Abstract
  • ions, which imply that their toxicity can be reduced by either adapting surface properties or choosing alternative synthesis methods, so that their use could be rendered more safely in a plethora of applications. Experimental Nanoparticle production and characterization The applied laser-based approach
PDF
Album
Full Research Paper
Published 21 May 2014

Chemi- vs physisorption in the radical functionalization of single-walled carbon nanotubes under microwaves

  • Victor Mamane,
  • Guillaume Mercier,
  • Junidah Abdul Shukor,
  • Jérôme Gleize,
  • Aziz Azizan,
  • Yves Fort and
  • Brigitte Vigolo

Beilstein J. Nanotechnol. 2014, 5, 537–545, doi:10.3762/bjnano.5.63

Graphical Abstract
  • to the CNTs. It is recognized to be an efficient way to confer specific surface properties [5]. However, the methods generally used for the covalent functionalization of CNTs often require long reaction times (from several hours to days) [6]. The reaction times can be considerably reduced to a few
PDF
Album
Full Research Paper
Published 29 Apr 2014

Nanoscale patterning of a self-assembled monolayer by modification of the molecule–substrate bond

  • Cai Shen and
  • Manfred Buck

Beilstein J. Nanotechnol. 2014, 5, 258–267, doi:10.3762/bjnano.5.28

Graphical Abstract
  • image, which has to be developed by, for example, conversion into a pattern that exhibits heterogeneous surface properties as illustrated in Figure 1b. As mentioned above this is conveniently done by exploiting the differences in the strength of the S–metal bond between Au and Ag and Cu [25]. While the
PDF
Album
Supp Info
Full Research Paper
Published 10 Mar 2014

Quantum size effects in TiO2 thin films grown by atomic layer deposition

  • Massimo Tallarida,
  • Chittaranjan Das and
  • Dieter Schmeisser

Beilstein J. Nanotechnol. 2014, 5, 77–82, doi:10.3762/bjnano.5.7

Graphical Abstract
  • purity [4]. The growth of TiO2 by ALD is a well-studied process and has been recently reviewed [5]. Charge carrier transport and separation, which strongly depend on interface and surface properties [6][7], are among the most important aspects of energy conversion processes. Therefore the further
PDF
Album
Full Research Paper
Published 22 Jan 2014

Dynamic nanoindentation by instrumented nanoindentation and force microscopy: a comparative review

  • Sidney R. Cohen and
  • Estelle Kalfon-Cohen

Beilstein J. Nanotechnol. 2013, 4, 815–833, doi:10.3762/bjnano.4.93

Graphical Abstract
PDF
Album
Review
Published 29 Nov 2013

Multiple regimes of operation in bimodal AFM: understanding the energy of cantilever eigenmodes

  • Daniel Kiracofe,
  • Arvind Raman and
  • Dalia Yablon

Beilstein J. Nanotechnol. 2013, 4, 385–393, doi:10.3762/bjnano.4.45

Graphical Abstract
  • . Keywords: atomic force microscopy; bimodal AFM; cantilever eigenmodes; polymer characterization; Introduction Atomic force microscopy (AFM) has arisen as one of the key tools for characterization of morphology and surface properties of materials (e.g., polymer blends and composites) at the micro
PDF
Album
Supp Info
Full Research Paper
Published 21 Jun 2013

Polynomial force approximations and multifrequency atomic force microscopy

  • Daniel Platz,
  • Daniel Forchheimer,
  • Erik A. Tholén and
  • David B. Haviland

Beilstein J. Nanotechnol. 2013, 4, 352–360, doi:10.3762/bjnano.4.41

Graphical Abstract
  • measurements [5][6][7][8][9][10] is a strong driving force for the development of atomic force microscopy (AFM). The advent of multifrequency AFM resulted in a variety of new measurement techniques enabling enhanced contrast and spatial mapping of surface properties on a wide range of samples [11]. However
  • reconstruction allows for the extraction of properties such as surface adhesion, sample stiffness or interaction geometry. We demonstrate this extraction of surface properties with high-resolution stiffness maps on a blend of polystyrene (PS) and poly(methyl methacrylate) (PMMA). Polynomial reconstruction, and
  • reconstruct sharp features in the force curve, such as the force minimum. Surface parameter mapping Material scientists are often interested in determining surface properties with high spatial resolution. ImAFM measurements can be performed while scanning a sample surface [24][25], enabling polynomial force
PDF
Album
Supp Info
Full Research Paper
Published 10 Jun 2013

Selective surface modification of lithographic silicon oxide nanostructures by organofunctional silanes

  • Thomas Baumgärtel,
  • Christian von Borczyskowski and
  • Harald Graaf

Beilstein J. Nanotechnol. 2013, 4, 218–226, doi:10.3762/bjnano.4.22

Graphical Abstract
  • amplitude–phase–distance curves [40]. From such experiments, the dissipated energy of the AFM tip oscillation can be calculated, which depends on the local elastic and therefore structural surface properties of the substrate. The surface coverage of the relatively rigid silicon oxide with “softer” organic
PDF
Album
Full Research Paper
Published 25 Mar 2013

Photoresponse from single upright-standing ZnO nanorods explored by photoconductive AFM

  • Igor Beinik,
  • Markus Kratzer,
  • Astrid Wachauer,
  • Lin Wang,
  • Yuri P. Piryatinski,
  • Gerhard Brauer,
  • Xin Yi Chen,
  • Yuk Fan Hsu,
  • Aleksandra B. Djurišić and
  • Christian Teichert

Beilstein J. Nanotechnol. 2013, 4, 208–217, doi:10.3762/bjnano.4.21

Graphical Abstract
  • difference between the 0.22 eV found here and the 0.54 eV can be simply explained by a higher junction temperature induced by the higher current. On the one hand, this “heating” affects the surface properties due to increased desorption, and on the other hand it might lead to a local annealing of the nanorod
PDF
Album
Full Research Paper
Published 21 Mar 2013
Other Beilstein-Institut Open Science Activities