Theodore Kuwana

Bio: Theodore Kuwana is an academic researcher from Case Western Reserve University. The author has contributed to research in topics: Glassy carbon & Cyclic voltammetry. The author has an hindex of 42, co-authored 95 publications receiving 5481 citations. Previous affiliations of Theodore Kuwana include Ohio State University.

Vacuum heat-treatment for activation of glassy carbon electrodes

Abstract: Le traitement thermique d'une electrode de carbone vitreux, a 725°C sous vide pousse (<2.10 −6 Torr) permet d'obtenir une electrode active vis-a-vis de l'oxydoreduction du ferro-ferricyanure et pour l'oxydation d'acide ascorbique

Electrodeposition of platinum microparticles into polyaniline films with electrocatalytic applications

Abstract: The electrodeposition of platinum microparticles into polyaniline (PA) films on glassy carbon (gc) electrodes and their catalytic activity for the reduction of hydrogen and the oxidation of methanol are described. Electrodeposited platinum microparticles are dispersed in a three-dimensional array in fibril-type polyaniline film electrodes as evidenced by scanning electron microscope photomicrographs. These Pt/PA/gc electrodes exhibit good activity with respect to the catalytic reduction of hydrogen and the catalytic oxidation of methanol. Since polyaniline is a conducting polymer at potentials positive of 0.2 V vs Ag/AgCl, the PA films contribute a substantial amount of charge during the oxidation of methanol at 0.6 V. In addition, they also offer a protecting matrix for the Pt microparticles against particle loss and contamination from the bulk solution. The electrodes exhibited excellent long-term stability in the acidic methanol solutions.

Functionalization of Graphene: Covalent and Non-Covalent Approaches, Derivatives and Applications

Abstract: Approaches, Derivatives and Applications Vasilios Georgakilas,† Michal Otyepka,‡ Athanasios B. Bourlinos,‡ Vimlesh Chandra, Namdong Kim, K. Christian Kemp, Pavel Hobza,‡,§,⊥ Radek Zboril,*,‡ and Kwang S. Kim* †Institute of Materials Science, NCSR “Demokritos”, Ag. Paraskevi Attikis, 15310 Athens, Greece ‡Regional Centre of Advanced Technologies and Materials, Department of Physical Chemistry, Faculty of Science, Palacky University Olomouc, 17. listopadu 12, 771 46 Olomouc, Czech Republic Center for Superfunctional Materials, Department of Chemistry, Pohang University of Science and Technology, San 31, Hyojadong, Namgu, Pohang 790-784, Korea Institute of Organic Chemistry and Biochemistry, Academy of Sciences of the Czech Republic, v.v.i., Flemingovo naḿ. 2, 166 10 Prague 6, Czech Republic

Flexible Graphene Films via the Filtration of Water-Soluble Noncovalent Functionalized Graphene Sheets

Abstract: Flexible graphene films were prepared by the filtration of water-soluble noncovalently functionalized graphene sheets with pyrenebutyrate. The work presented here will not only open a new way for preparing water-soluble graphene dispersions but also provide a general route for fabricating conducting films based on graphene.

Noncovalent Sidewall Functionalization of Single-Walled Carbon Nanotubes for Protein Immobilization

Abstract: Single-walled carbon nanotubes (SWNTs) are molecular wires that exhibit interesting structural, mechanical, electrical, and electromechanical properties. 1-3 A SWNT is unique among solidstate materials in that every atom is on the surface. Surface chemistry could therefore be critical to the physical properties of SWNTs and their applications. 3-10 SWNT sidewall functionalization is important to soluble nanotubes, 4-6 self-assembly on surfaces, and chemical sensors. 8-10 For these purposes, it is imperative to functionalize the sidewalls of SWNTs in noncovalent ways to preserve the sp 2 nanotube structure and thus their electronic characteristics. Immobilization of biomolecules on carbon nanotubes has been pursued in the past, motivated by the prospects of using nanotubes as new types of biosensor materials. 11-15 The electronic properties of nanotubes coupled with the specific recognition properties of the immobilized biosystems would indeed make for an ideal miniaturized sensor. A prerequisite for research in this area is the development of chemical methods to immobilize biological molecules onto carbon nanotubes in a reliable manner. Thus far, only limited work has been carried out with multiwalled carbon nanotubes (MWNTs). 11-15 Metallothionein proteins were trapped inside and placed onto the outer surfaces of open-ended MWNTs.11-14 Streptavidin was found to adsorb on MWNTs presumably via hydrophobic interactions between the nanotubes and hydrophobic domains of the proteins. 15 DNA molecules adsorbed on MWNTs via nonspecific interactions were also observed. 12-14

Advanced carbon electrode materials for molecular electrochemistry.

Abstract: 3.6.1. Polishing and Cleaning 2663 3.6.2. Vacuum and Heat Treatments 2664 3.6.3. Carbon Electrode Activation 2665 3.7. Summary and Generalizations 2666 4. Advanced Carbon Electrode Materials 2666 4.1. Microfabricated Carbon Thin Films 2666 4.2. Boron-Doped Diamond for Electrochemistry 2668 4.3. Fibers and Nanotubes 2669 4.4. Carbon Composite Electrodes 2674 5. Carbon Surface Modification 2675 5.1. Diazonium Ion Reduction 2675 5.2. Thermal and Photochemical Modifications 2679 5.3. Amine and Carboxylate Oxidation 2680 5.4. Modification by “Click” Chemistry 2681 6. Synopsis and Outlook 2681 7. Acknowledgments 2682 8. References 2682