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    Comment on "synthesis, characterization and growth mechanism of flower-like vanadium carbide hierarchical nanocrystals"
    (2012) Presser, Volker; Vakifahmetoglu, Cekdar
    This Letter is in response to a recent paper by Ma et al. (CrystEngComm, 2010, 12, 750-754) which arguably studied vanadium carbide nanostructures whereas all available evidence indicates the study of vanadium oxide. We feel that it is important to communicate to the community several inconsistencies so that the interesting material reported can be seen in the right light, especially with several groups nowadays having reported similar structures from vanadium oxide synthesis. © 2012 The Royal Society of Chemistry.
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    Electrospinning and electrospraying of silicon oxycarbide-derived nanoporous carbon for supercapacitor electrodes
    (Elsevier Science Bv, 2016) Tolosa, Aura; Kruener, Benjamin; Jaeckel, Nicolas; Asian, Mesut; Vakıfahmetoglu, Cekdar; Presser, Volker
    In this study, carbide-derived carbon fibers from silicon oxycarbide precursor were synthesized by electrospinning of a commercially available silicone resin without adding a carrier polymer for the electrospinning process. The electrospun fibers were pyrolyzed yielding SiOC. Modifying the synthesis procedure, we were also able to obtain electrosprayed SiOC beads instead of fibers. After chlorine treatment, nanoporous carbon with a specific surface area of up to 2394 m(2) g(-1) was obtained (3089 m(2) g(-1) BET). Electrochemical characterization of the SiOC-CDC either as free-standing fiber mat electrodes or polymer-bound bead films was performed in 1 M tetraethylammonium tetrafluoroborate in acetonitrile (TEA-BF4 in ACN). The electrospun fibers presented a high gravimetric capacitance of 135 F g(-1) at 10 mV s(-1) and a very high power handling, maintaining 63% of the capacitance at 100 A g(-1). Comparative data of SiOC-CDC beads and fibers show enhanced power handling for fiber mats only when the fiber network is intact, that is, a lowered performance was observed when using crushed mats that employ polymer binder. (c) 2016 Elsevier B.V. All rights reserved.
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    Hierarchical porous carbide-derived carbons for the removal of cytokines from blood plasma
    (Wiley-Blackwell, 2012) Presser, Volker; Yeon, Sun-Hwa; Vakıfahmetoğlu, Cekdar; Howell, Carol A.; Sandeman, Susan R.; Colombo, Paolo; Gogotsi, Yury
    Carbide-derived carbons with hierarchical porosity derived from a polymer precursor can be used for the extracorporeal removal of pro- and anti-inflammatory cytokines. The removal rates scale with the surface area of pores large enough to accommodate the protein molecules and this method has potential for efficacious treatment of sepsis, one of the major challenges in healthcare. Further information can be found in the Communication by S. Mikhalovsky, Y. Gogotsi, and co-workers on page 796.