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

• solvents [2], specificity towards small molecules or larger biomolecules [3], suppression of nonspecific adsorption [4], adjustment of net electric charge [5], to electrochemical activity [6]. Although it has been shown that synthetic and natural systems share a number of similarities, the degree of

A catechol biosensor based on electrospun carbon nanofibers

• Dawei Li,
• Zengyuan Pang,
• Xiaodong Chen,
• Lei Luo,
• Yibing Cai and
• Qufu Wei

Beilstein J. Nanotechnol. 2014, 5, 346–354, doi:10.3762/bjnano.5.39

• currents corresponding to redox peaks grew linearly with the scan rates from 0.05 to 0.3 V·s−1. This indicated that the electron transfer occurred easily between the laccase–Nafion–ECNFs composite and the surface of the GC electrode and that the electrochemical activity of the whole process is surface

Constant-distance mode SECM as a tool to visualize local electrocatalytic activity of oxygen reduction catalysts

• Michaela Nebel,
• Thomas Erichsen and
• Wolfgang Schuhmann

Beilstein J. Nanotechnol. 2014, 5, 141–151, doi:10.3762/bjnano.5.14

• electrochemical activity of the investigated sample surface caused by local variations of reaction rates. The tip current is, however, distance dependent and variations in the topography as well as in the local reactivity of the sample surface may both affect the tip response. Therefore, an unambiguous

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

• standard electrochemical techniques to provide an in-depth understanding of degradation phenomena under accelerated-aging conditions at low-temperatures. We investigate the electrochemical activity and the macroscopic as well as nanoscale stability of three different Pt/C materials, i.e., Pt/Vulcan 3–4 nm

Some reflections on the understanding of the oxygen reduction reaction at Pt(111)

• Ana M. Gómez-Marín,
• Ruben Rizo and
• Juan M. Feliu

Beilstein J. Nanotechnol. 2013, 4, 956–967, doi:10.3762/bjnano.4.108

• reactions [49][50][51]. Interestingly, on Pt(111) these reactions superimpose the CV in the potential range between the butterfly and the PtO-formation peak (Figure 9). In this potential region, the electrochemical activity is negligible in the supporting electrolyte solution, unless the upper limit becomes

Synthesis and electrochemical performance of Li₂Co_1−xM_xPO₄F (M = Fe, Mn) cathode materials

• Nellie R. Khasanova,
• Oleg A. Drozhzhin,
• Stanislav S. Fedotov,
• Darya A. Storozhilova,
• Rodion V. Panin and
• Evgeny V. Antipov

Beilstein J. Nanotechnol. 2013, 4, 860–867, doi:10.3762/bjnano.4.97

• operating potential because of the increased ionicity of the M–F bond. Furthermore, A2MPO4F cathode materials may reach capacity values larger than 200 mA·h·g−1, if more than one lithium atom would participate in the reversible de/intercalation process. Li2CoPO4F, which exhibits an electrochemical activity

• -shared CoO4F2-octahedra interconnected with PO4-tetrahedra, which generate a framework with channels through which alkali-ion diffusion can take place [2][3][4] (Figure 1). The reversible electrochemical activity of Li2CoPO4F has been studied by several groups [4][5][6][7][8][9]. Our previous

• 1 M LiBF4/TMS to investigate the electrochemical activity of the fluorophosphate materials. LiBF4 salt was chosen instead of LiTFSI, because the last one corrodes the aluminum current collector at high potentials. Preliminarily, the stability of both electrolytes was investigated by cyclic

Influence of particle size and fluorination ratio of CF_x precursor compounds on the electrochemical performance of C–FeF₂ nanocomposites for reversible lithium storage

• Ben Breitung,
• M. Anji Reddy,
• Venkata Sai Kiran Chakravadhanula,
• Michael Engel,
• Christian Kübel,
• Annie K. Powell,
• Horst Hahn and
• Maximilian Fichtner

Beilstein J. Nanotechnol. 2013, 4, 705–713, doi:10.3762/bjnano.4.80

• material in the matrix is a precondition for its electrochemical activity [17][18]. In addition, volume changes that result from phase conversion of the active material during charging and discharging may lead to cracks in the particles and result in poor cyclic stabilities. For this reason, mostly carbon

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

• inside PVP nanofibers retian their electrochemical activity. The properties and facile preparation method make the Fc/PVP nanofibers promising for antibacterial and sensing applications. Keywords: composites; electrochemistry; electrospinning; membranes; porous materials; Introduction Electrospinning

• displayed apparent electrochemical activity corresponding to the Fc+/Fc couple in PBS (pH 7) solution. When tryptophan was added, the peak current decreased with the increase of tryptophan concentration. The main reason was the coordination between Fc+ and tryptophan ion. Since the method demonstrated here

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

• the presence of MWCNTs. The sensitivity of the modified GC electrode increased by a factor of 2.8 and is attributed to the increased surface area provided by the MWCNT coating on the GCE, and to enhanced electrochemical activity from edge-plane defects at the MWCNTs facilitating the electron transfer