S
Steffi Krause
Researcher at Queen Mary University of London
Publications - 70
Citations - 1663
Steffi Krause is an academic researcher from Queen Mary University of London. The author has contributed to research in topics: Photocurrent & Biosensor. The author has an hindex of 22, co-authored 63 publications receiving 1357 citations. Previous affiliations of Steffi Krause include University of Sheffield & Newcastle University.
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Control of oxygen vacancies in ZnO nanorods by annealing and their influence on ZnO/PEDOT:PSS diode behaviour
TL;DR: In this article, a p-type polymer poly(3,4-ethylenedioxythiophene)polystyrene sulfonate (PEDOT:PSS) was spray coated onto the top of ZnO nanorods to form a p−n junction.
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Chemical sensitivity of an ISFET with Ta2O5 membrane in strong acid and alkaline solutions
TL;DR: In this article, a detailed study concerning the chemical sensitivity of an ISFET with a Ta 2 O 5 membrane is presented, and the results indicate that in the absence of alkali ions, the Ta 2 o 5 -ISFET has practically an ideal Nernstian pH response in a wide pH range from −7 to 137.
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Electrochemical sensor for measurement of urea and creatinine in serum based on ac impedance measurement of enzyme-catalyzed polymer transformation.
Wah On Ho,Steffi Krause,Calum J. McNeil,Jeanette A. Pritchard,R.D. Armstrong,Dale Athey,Keith Rawson +6 more
TL;DR: A polymer, based on poly(methylvinyl ether)/maleic anhydride modified by esterification with n-octanol, which is stable at pH 7.4 and which is transformed rapidly in response to alkaline pH changes, was linked to enzymatic reactions between urease and urea or Creatinine deiminase and creatinine to produce a disposable sensor system.
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Electrochemical Sensors Based on Impedance Measurement of Enzyme-Catalyzed Polymer Dissolution: Theory and Applications
Calum J. McNeil,Dale Athey,Mark Ball,Wah On Ho,Steffi Krause,R.D. Armstrong,J. Des Wright,Keith Rawson +7 more
TL;DR: A novel sensor approach based on ac impedance measurement of capacitance changes produced during enzyme-catalyzed dissolution of polymer coatings on electrodes, leading to a 4 orders of magnitude change in capacitance, is described, which should allow simple, interference-free measurement of urea in serum and whole blood.
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Simultaneous quartz crystal microbalance impedance and electrochemical impedance measurements. Investigation into the degradation of thin polymer films
Andrea Sabot,Steffi Krause +1 more
TL;DR: A novel combination of quartz crystal microbalance (QCM) and electrochemical impedance spectroscopy (EIS) has been developed to monitor the degradation of thin polymer films, demonstrating how the complementary information obtained by the two techniques allows a detailed description of the dissolution process.