Design criteria for stable Pt/C fuel cell catalysts

• Josef C. Meier,
• Carolina Galeano,
• Ioannis Katsounaros,
• Jonathon Witte,
• Hans J. Bongard,
• Angel A. Topalov,
• Claudio Baldizzone,
• Stefano Mezzavilla,
• Ferdi Schüth and
• Karl J. J. Mayrhofer

Beilstein J. Nanotechnol. 2014, 5, 44–67, doi:10.3762/bjnano.5.5

Ultramicrosensors based on transition metal hexacyanoferrates for scanning electrochemical microscopy

• Maria A. Komkova,
• Angelika Holzinger,
• Andreas Hartmann,
• Alexei R. Khokhlov,
• Christine Kranz,
• Arkady A. Karyakin and
• Oleg G. Voronin

Beilstein J. Nanotechnol. 2013, 4, 649–654, doi:10.3762/bjnano.4.72

• Sigma-Aldrich. Polishing materials were obtained from Leco Instruments GmbH and Allied High Tech Products Inc. Gold and platinum microwires were purchased from Goodfellow. The micro glassy carbon electrodes were obtained from ESA Biosciences Inc. The electrochemical experiments were conducted in a three

A nano-graphite cold cathode for an energy-efficient cathodoluminescent light source

• Alexander N. Obraztsov,
• Victor I. Kleshch and
• Elena A. Smolnikova

Beilstein J. Nanotechnol. 2013, 4, 493–500, doi:10.3762/bjnano.4.58

• ], glassy carbon [10], graphite [11], and carbon nanotubes [12]. The low threshold voltage and the intensive emission properties, which are usually observed for these materials, result from the high aspect ratio of emission sites, which are located on the edges of the graphene monoatomic layers. The low

Electrospinning preparation and electrical and biological properties of ferrocene/poly(vinylpyrrolidone) composite nanofibers

• Ji-Hong Chai and
• Qing-Sheng Wu

Beilstein J. Nanotechnol. 2013, 4, 189–197, doi:10.3762/bjnano.4.19

• demonstrated that the morphologies and diameters of nanofibers could be controlled by adjusting the type of solvents and Fc concentration. These electrospun Fc/PVP nanofibers had bactericidal activity against the Gram-negative bacteria E. coli, and the glassy carbon electrode modified with Fc/PVP nanofibers

Glassy carbon electrodes modified with multiwalled carbon nanotubes for the determination of ascorbic acid by square-wave voltammetry

• Sushil Kumar and
• Victoria Vicente-Beckett

Beilstein J. Nanotechnol. 2012, 3, 388–396, doi:10.3762/bjnano.3.45

• carbon nanotubes were used to modify the surface of a glassy carbon electrode to enhance its electroactivity. Nafion served to immobilise the carbon nanotubes on the electrode surface. The modified electrode was used to develop an analytical method for the analysis of ascorbic acid (AA) by square-wave

• voltammetry (SWV). The oxidation of ascorbic acid at the modified glassy carbon electrode showed a peak potential at 315 mV, about 80 mV lower than that observed at the bare (unmodified) electrode. The peak current was about threefold higher than the response at the bare electrode. Replicate measurements of

• no significant difference (P = 0.05). Keywords: ascorbic acid; carbon nanotubes; glassy carbon electrode; square-wave voltammetry; Introduction L-ascorbic acid (AA), also known as vitamin C, is a well-known antioxidant, which helps the human body to reduce oxidative damage and protects food quality

Recrystallization of tubules from natural lotus (Nelumbo nucifera) wax on a Au(111) surface

• Sujit Kumar Dora and
• Klaus Wandelt

Beilstein J. Nanotechnol. 2011, 2, 261–267, doi:10.3762/bjnano.2.30

• ., 200, 220, 260, 280 and 300 nm) as observed in our experiments. Such variations in the outer diameter can also be found on a number of different substrates, e.g., glassy carbon, mica, glass, etc., as was also observed in our experiments. Figure 2a shows an initial stage of layer by layer growth of a

• tubule on a glassy carbon surface. A line profile across the layer (Figure 2b) clearly demonstrates that the height of a single layer is about 20 nm (standard deviation 2 nm, number of measurements = 5) which clearly agrees with the stepwise tubule outer diameter variation in multiples of 20 nm. The

• morphological change. Size = 4.9 × 4.9 µm2, scan rate = 0.619 Hz, 256 lines. Initial stage formation of lotus wax tubules on a glassy carbon surface (a) and profile across the marked section (b) showing the average layer height to be about 20 nm (standard deviation 2 nm, number of measurements = 5) in agreement

Electrochemical behavior of dye-linked L-proline dehydrogenase on glassy carbon electrodes modified by multi-walled carbon nanotubes

• Haitao Zheng,
• Leyi Lin,
• Yosuke Okezaki,
• Ryushi Kawakami,
• Haruhiko Sakuraba,
• Toshihisa Ohshima,
• Keiichi Takagi and
• Shin-ichiro Suye

Beilstein J. Nanotechnol. 2010, 1, 135–141, doi:10.3762/bjnano.1.16

• , Institute of Genetic Resources, Faculty of Agriculture, Kyushu University, Fukuoka 812-8581, Japan Wakasa Wan Energy Research Center, Tsuruga 914-0192, Japan 10.3762/bjnano.1.16 Abstract A glassy carbon electrode (GC) was modified by multi-walled carbon nanotubes (MWCNTs). The modified electrode showed a

• ) was used to observe the surface of MWCNTs-modified electrode. All electrochemical experiments were performed on a potentiostat (CHI-800B, Austin, USA) connected to a personal computer. A typical three-electrode system was used, with a 3 mm diameter of glassy carbon electrode (GC) as the working