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The remote control workplace of electrochemical sensors
Cieslar, Jakub ; Šteffan, Pavel (referee) ; Adámek, Martin (advisor)
This master’s thesis deals with the design of automated workplase for measurement with electrochemical sensors. Design and realization of a device, which communicates with computer and which can be controlled via WAN or LAN nets, are the main aims of this work. This thesis describes the process of designing, realization and optimalization of designed preparation adjustment. It also describes created software of a device, driver for service PC and programme of a web client.
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Modification of electrochemical sensors working electrodes for biological substances detection
Weiss, Vojtěch ; Prášek, Jan (referee) ; Majzlíková, Petra (advisor)
The aim of this work is modification of working electrode surface of screen-printed electrochemical sensors using carbon nanotubes. General knowledge about sensors, their categorization, thick-film technology, properties, preparation and utilization of carbon nanotubes and selected electrochemical methods are reported in theoretical part. Three different methods of working electrodes modification with carbon nanotubes are described in the experimental part of the thesis. Furthermore characterization of modified and unmodified electrodes using cyclic voltammetry, electrochemical impedance spectroscopy and scanning electron microscopy is presented. All results are summarized and discussed in the conclusion of this work.
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Measurement and control of O2 in the atmosphere and the liquid within the cell incubators
Nečasová, Barbora ; Balogh, Jaroslav (referee) ; Sekora, Jiří (advisor)
This bachelor thesis deals with the measurement and regulation of oxygen in the atmosphere and in liquid inside incubators for cell culture. It is based on specified requirements and parameters set by the Laboratory of the Biophysics of the Faculty of Electrical Engineering and Communication of BUT (FEKT VUT). In the theoretical part, types and principles of sensors are described. The theoretical part describes the types and principles of the sensors. The main part of the thesis is focused on the design and subsequent realization of oxygen sensor using a microcontroller.
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Nanopatterned alumina-based materials for electrochemical sensors and biosensors
Kynclová, Hana ; Hynek, David (referee) ; Trnková, Libuše (referee) ; Prášek, Jan (advisor)
The doctoral thesis is focused on basic research and development of nanostructured surfaces prepared using anodic alumina material. Various types of gold nanostructured surfaces and nanoporous aluminum membranes for electrochemical sensors and biosensors were prepared using the anodic oxidation method. Nanostructured surfaces were prepared by electrochemical anodization of aluminum material to form hexagonally arranged nanopores. Gold was then deposited into the nanoporous masks by electrochemical reduction from potassium dicyanoaurate solution using a pulse deposition method. The prepared nanostructured gold surfaces were electrochemically characterized by electrochemical impedance spectroscopy and voltammetry. Temperature stability and the effect of annealing on their electrochemical behavior at atmospheric pressure as well as in the vacuum were investigated. Then, gold nanostructures of various dimensions were prepared and the influence of their shape and dimensions on the electrochemical behavior was studied. Nanostructured surfaces were also modified with 11–mercaptoundecanoic acid, and the effect of this modification on the electrochemical results was studied. In the last part of the work, nanoporous aluminum membranes were prepared, and their permeability was studied.
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Design of an electrochemical sensor for ethanol measurement
Božek, Jakub ; Jankovský, Jaroslav (referee) ; Otáhal, Alexandr (advisor)
This bachelor thesis deals with printed electrochemical sensors and the measurement of glucose and ethanol in blood solution. The theoretical part describes the sensors, their distribution and applications. Then the thesis focuses in detail on electrochemical sensors, measurements and their electrodes. Then, in the practical part, the sensor designs, fabrication of the sensors and the measurements made are presented.
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Nanopatterned alumina-based materials for electrochemical sensors and biosensors
Kynclová, Hana ; Hynek, David (referee) ; Trnková, Libuše (referee) ; Prášek, Jan (advisor)
The doctoral thesis is focused on basic research and development of nanostructured surfaces prepared using anodic alumina material. Various types of gold nanostructured surfaces and nanoporous aluminum membranes for electrochemical sensors and biosensors were prepared using the anodic oxidation method. Nanostructured surfaces were prepared by electrochemical anodization of aluminum material to form hexagonally arranged nanopores. Gold was then deposited into the nanoporous masks by electrochemical reduction from potassium dicyanoaurate solution using a pulse deposition method. The prepared nanostructured gold surfaces were electrochemically characterized by electrochemical impedance spectroscopy and voltammetry. Temperature stability and the effect of annealing on their electrochemical behavior at atmospheric pressure as well as in the vacuum were investigated. Then, gold nanostructures of various dimensions were prepared and the influence of their shape and dimensions on the electrochemical behavior was studied. Nanostructured surfaces were also modified with 11–mercaptoundecanoic acid, and the effect of this modification on the electrochemical results was studied. In the last part of the work, nanoporous aluminum membranes were prepared, and their permeability was studied.
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Limitations and Possibilities of Nanostructurized Silver Amalgam
Daňhel, Aleš ; Šebest, Peter ; Vidláková, Pavlína ; Ligmajer, Filip
Variability of silver amalgam offers a row of opportunities for its application in electrochemical and spectroelectrochemical methods, thanks to its chemical, mechanical, electrochemical and spectrometric properties. This work briefly revews preparation possibilities and limitations of nanostructurized crystalas and nanopartices pf silver amalgam at different forms of carbon metals (Ag, Au, Pt) and transparent materials (ITO, FTO). These detection sysytems are in the scope of ongoing systematics research with the potential to indevelopment of novel working (micro)electrodes and spectroelectrochemical cells, potentially utilizable in modern (bio)analytical applictions.
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Measurement and control of O2 in the atmosphere and the liquid within the cell incubators
Nečasová, Barbora ; Balogh, Jaroslav (referee) ; Sekora, Jiří (advisor)
This bachelor thesis deals with the measurement and regulation of oxygen in the atmosphere and in liquid inside incubators for cell culture. It is based on specified requirements and parameters set by the Laboratory of the Biophysics of the Faculty of Electrical Engineering and Communication of BUT (FEKT VUT). In the theoretical part, types and principles of sensors are described. The theoretical part describes the types and principles of the sensors. The main part of the thesis is focused on the design and subsequent realization of oxygen sensor using a microcontroller.
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