Surface-enhanced infrared absorption studies towards a new optical biosensor

• Lothar Leidner,
• Julia Stäb,
• Jennifer T. Adam and
• Günter Gauglitz

Beilstein J. Nanotechnol. 2016, 7, 1736–1742, doi:10.3762/bjnano.7.166

• shown here). Both a sensor with a Teflon layer (refractive index 1.29, layer thickness 1.65 µm) and a polycarbonate (PC) layer (refractive index 1.54, layer thickness 0.78 µm) were used in the experiments. The measurements were performed in three steps. At first, the cell on top of the polymer layer was

• the detector causing a nearly wavelength-independent baseline shift. Figure 2 shows the results of a sensor chip with polycarbonate (PC) coating. This case shows the same finding: appearance of the water band by addition of nanoparticles, and further absorbance increase by PBS-induced nanoparticle

• sensor was coated in one case with Teflon AF2400, in the other case with polycarbonate (PC). The Teflon AF2400 solution (2000 rpm at room temperature) was spin-coated onto the GaAs etalon in several layers (final layer thickness 1.65 µm, refractive index 1.29). Solid polycarbonate was solved in

High performance Ce-doped ZnO nanorods for sunlight-driven photocatalysis

• Bilel Chouchene,
• Tahar Ben Chaabane,
• Lavinia Balan,
• Emilien Girot,
• Kevin Mozet,
• Ghouti Medjahdi and
• Raphaël Schneider

Beilstein J. Nanotechnol. 2016, 7, 1338–1349, doi:10.3762/bjnano.7.125

• experiments conducted under visible light irradiation, a polycarbonate filter was used to cut off any light radiation below the wavelength of 400 nm. Characterization TEM images were taken by placing a drop of the particles dispersed in water onto a carbon film-supported copper grid. Samples were studied

Gold nanoparticles covalently assembled onto vesicle structures as possible biosensing platform

• M. Fátima Barroso,
• M. Alejandra Luna,
• Juan S. Flores Tabares,
• Cristina Delerue-Matos,
• N. Mariano Correa,
• Fernando Moyano and
• Patricia G. Molina

Beilstein J. Nanotechnol. 2016, 7, 655–663, doi:10.3762/bjnano.7.58

• . During the preparation of LUVs the following procedure was followed [1]: The LMV suspension was extruded ten times (Extruder, Lipex biomembranes) through two stacked polycarbonate filters of pore size 200 nm under nitrogen pressure up to 3.4 atm. In order to obtain the decorated vesicles (AuNPs–SH–DOPC

Functional fusion of living systems with synthetic electrode interfaces

• Oskar Staufer,
• Sebastian Weber,
• C. Peter Bengtson,
• Hilmar Bading,
• Joachim P. Spatz and
• Amin Rustom

Beilstein J. Nanotechnol. 2016, 7, 296–301, doi:10.3762/bjnano.7.27

• homogenous, low defect and parallel-oriented crystal planes were produced by electrodeposition as previously described [1]. This process employed polycarbonate (PC), track-etched filter membranes with a pore density of 1 × 106 pores/cm2 and a pore size of 100 nm (Figure 1a, 1–4). Aluminium (Al) contacts were

• complete cell layers. This could compensate for individual variation and serve to amplify weak electric output for improved detection of functions such as intercellular communication. (a) Fabrication of nanoelectrode interfaces (NEIs). Track-etched, polycarbonate (PC) filter membranes (a, 1) are sputter

Nanoscale rippling on polymer surfaces induced by AFM manipulation

• Mario D’Acunto,
• Franco Dinelli and
• Pasqualantonio Pingue

Beilstein J. Nanotechnol. 2015, 6, 2278–2289, doi:10.3762/bjnano.6.234

• mechanism: A peeling process with the material pushed ahead of the contact via crack propagation. For an injection-molded polycarbonate surface, Iwata et al. [18] have found that the bundles are less stiff than the undamaged surface, which they have also interpreted as evidence of the presence of micro

• one to several hundreds of nanometers can be reproduced on the surface of polycarbonate (PC), poly(methyl methacrylate) (PMMA), and polystyrene (PS) films. Authors have clearly shown that the ripple formation varies with T and polymer type (Figure 8a). The dependence on T has been characterized and

• from a manufacturer. PC is known to be amorphous, however the Mw value is not reported. In another paper [58] the same research group has studied the effect of the scanning angle on the ripple formation by a single scratch at very high loads on polycarbonate (PC) (Figure 12). Finally, by combining

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

• , was co-cultivated following previously described protocols [1][28]. Briefly, 5 × 105 Caco-2 cells (passage 8–20) suspended in 0.5 mL supplemented DMEM were seeded onto polycarbonate 12-well Transwell® filters (Corning Incorporated, USA; 3 µm mean pore size, 1.12 cm2 surface area). Caco-2 cells were

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

• voltammetry and analyze the deposition process in the channels of ion-track etched membranes compared to cyclic voltammetry for macroelectrodes. Experimental Polycarbonate foils (Makrofol N, Bayer AG) with a thickness of 30 μm were irradiated with Au ions (ca. 2 GeV) at the linear accelerator UNILAC at GSI

Pulmonary surfactant augments cytotoxicity of silica nanoparticles: Studies on an in vitro air–blood barrier model

• Jennifer Y. Kasper,
• Lisa Feiden,
• Maria I. Hermanns,
• Christoph Bantz,
• Michael Maskos,
• Ronald E. Unger and
• C. James Kirkpatrick

Beilstein J. Nanotechnol. 2015, 6, 517–528, doi:10.3762/bjnano.6.54

• % CO2 for 24 h prior to NP exposure to a confluent cell-layer. The coculture (CC) model of the air blood barrier: The coculture technique was performed as described by Hermanns et al. [17] with some alterations. HTS 24-Transwell® filters (polycarbonate, 0.4 µm pore size; Costar, Wiesbaden, Germany) were

Conformal SiO₂ coating of sub-100 nm diameter channels of polycarbonate etched ion-track channels by atomic layer deposition

• Nicolas Sobel,
• Christian Hess,
• Manuela Lukas,
• Anne Spende,
• Bernd Stühn,
• M. E. Toimil-Molares and
• Christina Trautmann

Beilstein J. Nanotechnol. 2015, 6, 472–479, doi:10.3762/bjnano.6.48

• 10.3762/bjnano.6.48 Abstract Polycarbonate etched ion-track membranes with about 30 µm long and 50 nm wide cylindrical channels were conformally coated with SiO2 by atomic layer deposition (ALD). The process was performed at 50 °C to avoid thermal damage to the polymer membrane. Analysis of the coated

• in the range of nanometres and lengths in the range of micrometres, cylindrical tubes with an aspect ratio as large as 3000 have been produced. Keywords: atomic layer deposition (ALD); ion-track technology; nanochannels; polycarbonate; silica (SiO2); small angle X-ray scattering (SAXS); track-etched

• narrow size distribution [4][5][6]. Typically, polymers such as polycarbonate (PC), polyethylene terephthalate, and polyimide are employed as templates. Hydrophilicity is sometimes improved by immersing the etched membrane in a surfactant solution such as polyvinylpyrrolidone. The addition of surfactants

Electrical properties of single CdTe nanowires

• Elena Matei,
• Camelia Florica,
• Andreea Costas,
• María Eugenia Toimil-Molares and
• Ionut Enculescu

Beilstein J. Nanotechnol. 2015, 6, 444–450, doi:10.3762/bjnano.6.45

• , a template approach for fabricating CdTe nanowires by electrodeposition inside ion track polycarbonate nanoporous membranes was employed. It was recently proved that one can easily control the characteristic of the nanowires prepared in this way by controlling the electrodeposition overpotential [15

• semiconductor for optoelectronics and this approach to CdTe nanowire fabrication gives the opportunity to measure electrical properties of individual nanostructures and to better understand them in correlation with the preparation methods. Experimental Polycarbonate foils of 30 μm thickness were irradiated with

Functionalized polystyrene nanoparticles as a platform for studying bio–nano interactions

• Cornelia Loos,
• Tatiana Syrovets,
• Anna Musyanovych,
• Volker Mailänder,
• Katharina Landfester,
• G. Ulrich Nienhaus and
• Thomas Simmet

Beilstein J. Nanotechnol. 2014, 5, 2403–2412, doi:10.3762/bjnano.5.250

• Harvard Center for Risk Assessment concluded that there is no reason for concern from exposure to polystyrene materials used in food-contact applications [16]. Due to its inertness and biocompatibility, polystyrene together with polycarbonate is widely used for the production of biomedical devices and

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

• control the scratch resistance of oxide surfaces. Titania films of several nm thickness are coated onto substrates of silicon, kapton, polycarbonate, and polydimethylsiloxane (PDMS). The scratch resistance measured by scanning force microscopy is found to be substrate dependent, diminishing in the order

• PDMS, kapton/polycarbonate, Si/SiO2. Furthermore, when PDMS is applied as an intermediate layer between a harder substrate and titania, marked improvement in the scratch resistance is achieved. This is shown by quantitative wear tests for silicon or kapton, by coating these substrates with PDMS which

• polydimethylsiloxane (PDMS) using liquid phase deposition [34][35][36]. In this work, we further apply the technique to polycarbonate (PC) substrates, which are used in the lens industry and carry requirement of scratch/wear resistance. In addition to scratch and wear resistance, we demonstrate that the soft polymer

Template based precursor route for the synthesis of CuInSe₂ nanorod arrays for potential solar cell applications

• Mikhail Pashchanka,
• Jonas Bang,
• Niklas S. A. Gora,
• Ildiko Balog,
• Rudolf C. Hoffmann and
• Jörg J. Schneider

Beilstein J. Nanotechnol. 2013, 4, 868–874, doi:10.3762/bjnano.4.98

• CuInSe2 (CISe) nanorods are promising for the fabrication of highly efficient active layers in solar cells. In this work we report on a nanocasting approach, which uses track-etched polycarbonate films as hard templates for obtaining three-dimensionally (3D) arranged CISe nanorod arrays. Copper and indium

• indirectly confirmed the flexibility of the solution route in preparation of semiconductors with controlled elemental composition. We recently successfully demonstrated electroless deposition of molecular precursors (Cu- and In-oximato complexes and thiourea) into track-etched polycarbonate templates and the

• an intensive dark-brown colour. A porous polycarbonate film (Whatman Nuclepore™ track-etch membrane, nominal pore size 0.1 μm) was immersed into the solution, ultrasonicated for 5 min for gas removal and complete pore infiltration (in a sealed flask under inert gas), and dried at ambient temperature

New hybrid materials based on poly(ethyleneoxide)-grafted polysilazane by hydrosilylation and their anti-fouling activities

• Thi Dieu Hang Nguyen,
• François-Xavier Perrin and
• Dinh Lam Nguyen

Beilstein J. Nanotechnol. 2013, 4, 671–677, doi:10.3762/bjnano.4.75

• (glass, polycarbonate, aluminium, steel, etc.) combined with a high brightness, a non-stick surface, and the resistance to heat, fire and UV irradiation. Poly(ethylene oxide) or poly(oxyethylene) (PEO) is a non-toxic polymer, which is used as a surface-modification agent, because it is effective in

Characterization and properties of micro- and nanowires of controlled size, composition, and geometry fabricated by electrodeposition and ion-track technology

• Maria Eugenia Toimil-Molares

Beilstein J. Nanotechnol. 2012, 3, 860–883, doi:10.3762/bjnano.3.97

• possible to create a preset regular ion-track arrangement by using a microprobe [37]. Materials commonly used as multi- and single-pore etched-ion-track membranes include polymers such as polyimide (PI), polyethylene terephthalate (PET) and polycarbonate (PC), and inorganic materials such as mica and glass

Self-assembled monolayers and titanium dioxide: From surface patterning to potential applications

• Yaron Paz

Beilstein J. Nanotechnol. 2011, 2, 845–861, doi:10.3762/bjnano.2.94

• 60 nm. Such thin lines were obtained by a dewetting and blow-drying process, which trapped silane solution only in the recesses of the molded stamp. In a different work, OTS was deposited by microcontact printing onto both external sides of a nanoporous polycarbonate filter. As a consequence, the ALD

• growth of titanium dioxide was limited to the inner walls of the polycarbonate filter. In that way, the performance of 100–800 ALD cycles followed by the etching away of the polycarbonate template with chloroform yielded TiO2 nanotubes, whose diameter could be predetermined according to the diameter of

Room temperature synthesis of indium tin oxide nanotubes with high precision wall thickness by electroless deposition

• Mario Boehme,
• Emanuel Ionescu,
• Ganhua Fu and
• Wolfgang Ensinger

Beilstein J. Nanotechnol. 2011, 2, 119–126, doi:10.3762/bjnano.2.14

• nanotubes consisting of indium tin oxide (ITO) were fabricated by electroless deposition using ion track etched polycarbonate templates. To produce nanotubes (NTs) with thin walls and small surface roughness, the tubes were generated by a multi-step procedure under aqueous conditions. The approach reported

• under aqueous conditions in ion track etched polycarbonate templates. Due to surface limitations, electroless deposition is a convenient and power saving method to construct hollow nanostructures. The structural properties of the ITO tubes grown were investigated by various analytical techniques. The

• etched polycarbonate template with Sn2+ ions by electrostatic attraction (Equation 1). Subsequently, in an activation step a redox reaction is carried out on the modified template surface by the addition of Ag+ ions which oxidizes the Sn2+ ions to Sn4+ ions. At the same time, Ag+ ions are reduced to