Search Results - "Wittstock, G."

Heterogeneous Distribution of Reactivity on Metallic Biomaterials: Scanning Probe Microscopy Studies of the Biphasic Ti Alloy Ti6Al4V by Pust, S. E., Scharnweber, D., Nunes Kirchner, C., Wittstock, G.

“…Biphasic titanium alloys are preferred materials for load‐bearing metallic implants such as artificial joints. A comprehensive understanding of the…”
Get full text

Integrated cantilever probes for SECM/AFM characterization of surfaces by Salomo, M., Pust, S.E., Wittstock, G., Oesterschulze, E.

“…Scanning electrochemical microscopy (SECM) has proven to be a valuable technique for the characterization of electrochemical surface properties with high…”
Get full text

Cellular fluid shear stress on implant surfaces—establishment of a novel experimental set up by Kämmerer, P. W., Thiem, D. G. E., Alshihri, A., Wittstock, G. H., Bader, R., Al-Nawas, B., Klein, M. O.

“…Background Mechanostimuli of different cells can affect a wide array of cellular and inter-cellular biological processes responsible for dental implant…”
Get full text

Bioelectrocatalytic Carbon Ceramic Gas Electrode for Reduction of Dioxygen and Its Application in a Zinc-Dioxygen Cell by Nogala, W., Celebanska, A., Wittstock, G., Opallo, M.

“…An enzyme‐modified carbon ceramic electrode was constructed and studied that is capable to reduce dioxygen supplied from the gas phase. The permeation of the…”
Get full text

Localized Deposition of Chitosan as Matrix for Enzyme Immobilization by Chen, Po-Chung, Chen, Richie L. C., Cheng, Tzong-Jih, Wittstock, G.

“…A local electrodeposition method was developed for chitosan by exploiting a pH gradient between a macroscopic electrode (the support) and a much smaller…”
Get full text

Imaging of microstructured biochemically active surfaces by means of scanning electrochemical microscopy by Kranz, C., Wittstock, G., Wohlschläger, H., Schuhmann, W.

“…Scanning electrochemical microscopy (SECM) has been used to create and to image thin film structures of functionalized polypyrrole, to which glucose oxidase…”
Get full text

Imaging of immobilized antibody layers with scanning electrochemical microscopy by Wittstock, Gunther, Yu, Ke-jia, Halsall, H. Brian, Ridgway, T. H, Heineman, William R

“…Visualization of immobilized antibodies can be achieved with scanning electrochemical microscopy (SECM) by saturation of the antigen binding sites with an…”
Get full text

Imaging the activity of nitrate reductase by means of a scanning electrochemical microscope by Zaumseil, J, Wittstock, G, Bahrs, S, Steinrücke, P

“…Scanning electrochemical microscopy (SECM) was used to characterize immobilized nitrate reductase (NaR) from Pseudonomonas stutzeri (E.C. 1.7.99.4). Nitrate…”
Get more information

New methods in flotation research—application of synchrotron radiation to investigation of adsorbates on modified galena surfaces by Szargan, R., Uhlig, I., Wittstock, G., Roβbach, P.

“…Synchrotron radiation-excited photoelectron spectra (SRXPS) were used in order to elucidate flotation-related problems arising from adsorption of…”
Get full text

Detection of elemental sulphur on galena oxidized in acidic solution by Kartio, I., Wittstock, G., Laajalehto, K., Hirsch, D., Simola, J., Laiho, T., Szargan, R., Suoninen, E.

“…Galena (PbS) oxidation on potentiostatically treated specimens in acetate buffer was investigated by atomic force microscopy (AFM) and by X-ray photoelectron…”
Get full text

Modification and characterization of artificially patterned enzymatically active surfaces by scanning electrochemical microscopy by Wittstock, G

“…This review summarizes the characterization of localized enzymatic activity by scanning electrochemical microscopy (SECM). After introducing the concepts of…”
Get more information

Amperometric carbohydrate detection in flow systems by means of a bismuth modified platinum electrode by Strübing, A, Wittstock, G, Szargan, R, Werner, G

“…Bismuth modified platinum electrodes are used for constant-potential amperometric determination of carbohydrates in flow systems. The monitored response is…”
Get full text

Feedback mode SECM study of laccase and bilirubin oxidase immobilised in a sol-gel processed silicate film by Nogala, Wojciech, Szot, Katarzyna, Burchardt, Malte, Roelfs, Folkert, Rogalski, Jerzy, Opallo, Marcin, Wittstock, Gunther

“…Thin silicate films with immobilised enzymes catalysing dioxygen reduction, i.e. laccase and bilirubin oxidase (BOD), were deposited on glass and poly(methyl…”
Get more information

Scanning electrochemical microscopy for detection of biosensor and biochip surfaces with immobilized pyrroloquinoline quinone (PQQ)-dependent glucose dehydrogenase as enzyme label by Zhao, Chuan, Wittstock, Gunther

“…Scanning electrochemical microscopy (SECM) was applied to study quinoprotein-based biosensor or biochip. A typical quinoprotein, pyrroloquinoline quinone…”
Get full text

Numerical Simulations of Complex Nonsymmetrical 3D Systems for Scanning Electrochemical Microscopy Using the Boundary Element Method by Sklyar, Oleg, Wittstock, Gunther

“…Quantitative treatment of the problems related to scanning electrochemical microscopy (SECM) is performed by means of numerical simulations using the boundary…”
Get full text

An SECM Detection Scheme with Improved Sensitivity and Lateral Resolution: Detection of Galactosidase Activity with Signal Amplification by Glucose Dehydrogenase by Zhao, Chuan, Wittstock, Gunther

“…An enzymatic amplification cycle is used in a novel detection scheme for scanning electrochemical microscopy (SECM). An immobilized enzyme system comprising…”
Get full text

Scanning Electrochemical Microscopy of Quinoprotein Glucose Dehydrogenase by Zhao, Chuan, Wittstock, Gunther

“…The activity of immobilized glucose dehydrogenase (GDH), a typical PQQ-dependent quinoprotein, was studied qualitatively and quantitatively by scanning…”
Get full text

Formation and Imaging of Microscopic Enzymatically Active Spots on an Alkanethiolate-Covered Gold Electrode by Scanning Electrochemical Microscopy by Wittstock, Gunther, Schuhmann, Wolfgang

“…Microscopic, enzymatically active spots on self-assembled monolayers (SAMs) of alkanethiolates on gold were obtained by a combination of localized desorption…”
Get full text

Generation of Periodic Enzyme Patterns by Soft Lithography and Activity Imaging by Scanning Electrochemical Microscopy by Wilhelm, Thomas, Wittstock, Gunther

“…Micropatterns of the enzymes glucose oxidase (GOx) and horseradish peroxidase (HRP) have been formed on polycrystalline gold and glass surfaces using different…”
Get full text

Combination of an electrochemical tunneling microscope (ECSTM) and a scanning electrochemical microscope (SECM): application for tip-induced modification of self-assembled monolayers by Treutler, Thomas H, Wittstock, Gunther

“…A combined instrument for electrochemical scanning tunneling microscopy (ECSTM) and scanning electrochemical microscopy (SECM) was constructed. It brings a…”
Get full text