Thermal energy storage – overview and specific insight into nitrate salts for sensible and latent heat storage

• Nicole Pfleger,
• Thomas Bauer,
• Claudia Martin,
• Markus Eck and
• Antje Wörner

Beilstein J. Nanotechnol. 2015, 6, 1487–1497, doi:10.3762/bjnano.6.154

• contrast, basalt and quartzite look promising from the first experiments, but long-term stability measurements are still required. Classification of heat storage media. Heat capacity of Solar Salt in the liquid phase [3][4][5][6][7][8][9]. Thermal conductivity of Solar Salt reported by several groups [8

Materials and characterization techniques for high-temperature polymer electrolyte membrane fuel cells

• Roswitha Zeis

Beilstein J. Nanotechnol. 2015, 6, 68–83, doi:10.3762/bjnano.6.8

• the robustness of the HT-PEMFC against structural variations due to electrode preparation [12]. Still the fabrication technique might have an effect on the long-term stability of the cell. The large shrinkage cracks are the main pathway of the phosphoric acid from the membrane though the GDL and out

• . Conclusion Phosphoric acid-doped PBI-type fuel cells are so far the most promising candidates for practical high-temperature operation under ambient pressure. For commercial deployment, however, the performance and long-term stability of the high-temperature MEAs still need significant improvement. To

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

• resonance and their additional strong contrast for CT-analysis, which enables dual detection for in vivo analysis. Furthermore, the materials of the metal oxide domain were chosen to exhibit magnetic behavior to be able to apply the multifunctional Janus particles as MRI contrast agents. As long term

• stability in aqueous media is of particular importance for biomedical applications, the extraordinary stability of silica encapsulated nanoparticles and the well-known surface chemistry of silica were transferred to Janus particles, whereby the Janus character was retained due to the distinct chemical

Electrical contacts to individual SWCNTs: A review

• Wei Liu,
• Christofer Hierold and
• Miroslav Haluska

Beilstein J. Nanotechnol. 2014, 5, 2202–2215, doi:10.3762/bjnano.5.229

• process and their effect on the device with respect to resistance are summarized. Finally, the challenges in obtaining high-performance CNFETs are discussed, covering the reproducibility, long term stability of electrical contact properties, and large-scale fabrication options. Carrier transport mechanism

• challenges are reproducibility, predictability and long-term stability of device performance, as well as the feasibility of large-scale fabrication. Comparing the performance of CNFETs obtained from the same fabrication batch, a large variation in the on-resistance was observed among thousands of devices [70

• the metal–SWCNT interface must be further investigated. The long-term stability of CNFET transfer characteristics is another major concern for their applicability, which has been studied by several authors [83][84][85]. For devices with the Cr/Au (3 nm/20 nm) contacts, the electrical contacts were

Current state of laser synthesis of metal and alloy nanoparticles as ligand-free reference materials for nano-toxicological assays

• Christoph Rehbock,
• Jurij Jakobi,
• Lisa Gamrad,
• Selina van der Meer,
• Daniela Tiedemann,
• Ulrike Taylor,
• Wilfried Kues,
• Detlef Rath and
• Stephan Barcikowski

Beilstein J. Nanotechnol. 2014, 5, 1523–1541, doi:10.3762/bjnano.5.165

Visible light photooxidative performance of a high-nuclearity molecular bismuth vanadium oxide cluster

• Johannes Tucher and
• Carsten Streb

Beilstein J. Nanotechnol. 2014, 5, 711–716, doi:10.3762/bjnano.5.83

• data suggest that in the 400–450 nm region, compound 1 might be employed as a homogeneous polyoxometalate photocatalyst with promising efficiencies for this compound class [5]. Recyclability of 1 To demonstrate the long-term stability and recyclability of 1, three consecutive photooxidative indigo

• irradiation, see Figure 5. The experimental series demonstrates that the cluster can be employed multiple times and catalyst recycling under photooxidative conditions is indeed possible. Stability of 1 under irradiation To understand the long-term stability of 1, long-irradiation runs with high substrate

A visible-light-driven composite photocatalyst of TiO₂ nanotube arrays and graphene quantum dots

• Donald K. L. Chan,
• Po Ling Cheung and
• Jimmy C. Yu

Beilstein J. Nanotechnol. 2014, 5, 689–695, doi:10.3762/bjnano.5.81

• ][2]. Among various photocatalysts, nanostructured titanium dioxide (TiO2) is the most widely used because of its high activity, long-term stability and low production cost [3][4]. However, pure TiO2 is not efficient for solar-driven applications because it requires UV excitation [5]. Belonging to one

Plasma-assisted synthesis and high-resolution characterization of anisotropic elemental and bimetallic core–shell magnetic nanoparticles

• M. Hennes,
• A. Lotnyk and
• S. G. Mayr

Beilstein J. Nanotechnol. 2014, 5, 466–475, doi:10.3762/bjnano.5.54

• shell consists of an oxygen-rich outer part of several nanometers thickness, which is in agreement with previous HRTEM bright field image results. Finally, the long-term stability of the samples has been analyzed. CS-NPs have therefore been stored for 12 months under ambient air conditions. Subsequent

Structural development and energy dissipation in simulated silicon apices

• Samuel Paul Jarvis,
• Lev Kantorovich and
• Philip Moriarty

Beilstein J. Nanotechnol. 2013, 4, 941–948, doi:10.3762/bjnano.4.106

• –sample forces and the long-term stability of the tip apex. We observe that the rotation of the simulated tip cluster around the surface normal axis can have a dramatic effect on the stability of the tip apex such that at particular alignments permanent structural deformations occur which lead to new

Electrochemical and electron microscopic characterization of Super-P based cathodes for Li–O₂ batteries

• Mario Marinaro,
• Santhana K. Eswara Moorthy,
• Jörg Bernhard,
• Ludwig Jörissen,
• Margret Wohlfahrt-Mehrens and
• Ute Kaiser

Beilstein J. Nanotechnol. 2013, 4, 665–670, doi:10.3762/bjnano.4.74

• able to give the desired discharge products, even if their long-term stability is still questionable [9][10][11][12][13][14][15]. In view of this, we present an investigation of the lithium-oxide phases that are generated during the operation of Li–O2 batteries, which use LiTFSI/tetraglyme as the

Novel composite Zr/PBI-O-PhT membranes for HT-PEFC applications

• Mikhail S. Kondratenko,
• Igor I. Ponomarev,
• Marat O. Gallyamov,
• Dmitry Y. Razorenov,
• Yulia A. Volkova,
• Elena P. Kharitonova and
• Alexei R. Khokhlov

Beilstein J. Nanotechnol. 2013, 4, 481–492, doi:10.3762/bjnano.4.57

• hydrogen produced by natural gas reforming, at the place of consumption. On the way to commercialization, however, this promising type of PEFC still faces several problems concerning its long term stability and the overall efficiency of electrode and membrane materials. These properties should be further

Kelvin probe force microscopy of nanocrystalline TiO₂ photoelectrodes

• Alex Henning,
• Gino Günzburger,
• Res Jöhr,
• Yossi Rosenwaks,
• Biljana Bozic-Weber,
• Catherine E. Housecroft,
• Edwin C. Constable,
• Ernst Meyer and
• Thilo Glatzel

Beilstein J. Nanotechnol. 2013, 4, 418–428, doi:10.3762/bjnano.4.49

• ., surface topography and potential, are still unclear and have the potential to increase the efficiency and long-term stability of the devices. Investigations of nanoscaled photovoltaic devices require nanometer-scale measuring methods, including time-resolved measurements of the carrier dynamics [15][16

Near-field effects and energy transfer in hybrid metal-oxide nanostructures

• Ulrich Herr,
• Barat Achinuq,
• Cahit Benel,
• Giorgos Papageorgiou,
• Manuel Goncalves,
• Johannes Boneberg,
• Paul Leiderer,
• Paul Ziemann,
• Peter Marek and
• Horst Hahn

Beilstein J. Nanotechnol. 2013, 4, 306–317, doi:10.3762/bjnano.4.34

• . Typically, noble metals are used for the metal nanostructures, since they offer both long term stability and strong resonant enhancements in the range of visible light. A general review of materials aspects in nanotechnology-based approaches in energy technology can be found in [8]. From the examples given

Reversible mechano-electrochemical writing of metallic nanostructures with the tip of an atomic force microscope

• Christian Obermair,
• Marina Kress,
• Andreas Wagner and
• Thomas Schimmel

Beilstein J. Nanotechnol. 2012, 3, 824–830, doi:10.3762/bjnano.3.92

• -selective electrochemical deposition. Here, we demonstrate the reversibility of this process and study the long-term stability of the resulting metallic structures. The remarkable stability for more than 1.5 years under ambient air without any observable changes can be attributed to self-passivation. After

• electrochemical deposition on the nanometer scale, e.g., by mechanically depassivating a surface. Here, we study this process in more detail. We demonstrate that the technique of AFM-tip-induced mechano-electrochemical writing is fully reversible, and we investigate the long-term stability of the resulting

• key feature for the technological relevance and application perspectives of electrochemically deposited nanostructures is their long-term stability. The nanostructures have to remain stable under ambient air after being taken out of the electrolyte. To study the long-term stability of

Low-temperature synthesis of carbon nanotubes on indium tin oxide electrodes for organic solar cells

• Andrea Capasso,
• Luigi Salamandra,
• Aldo Di Carlo,
• John M. Bell and
• Nunzio Motta

Beilstein J. Nanotechnol. 2012, 3, 524–532, doi:10.3762/bjnano.3.60

• the PCE of OSCs; or, once the process would be refined, they could become a suitable replacement for PEDOT:PSS, with the aim of improving the interface morphology without compromising the long-term stability of the cell. To this end, more research should be devoted to obtain a more uniform and ohmic

Superhydrophobic surfaces of the water bug Notonecta glauca: a model for friction reduction and air retention

• Petra Ditsche-Kuru,
• Erik S. Schneider,
• Jan-Erik Melskotte,
• Martin Brede,
• Alfred Leder and
• Wilhelm Barthlott

Beilstein J. Nanotechnol. 2011, 2, 137–144, doi:10.3762/bjnano.2.17

• hold additional air for respiration. The volume of the air might be more relevant than long term stability of the air film because the air store in this area is frequently renewed. The underside of the elytra with a dense but pure microtrichia cover showed high air film persistence. This observation

Preparation and characterization of supported magnetic nanoparticles prepared by reverse micelles

• Ulf Wiedwald,
• Luyang Han,
• Johannes Biskupek,
• Ute Kaiser and
• Paul Ziemann

Beilstein J. Nanotechnol. 2010, 1, 24–47, doi:10.3762/bjnano.1.5