Studentische Arbeiten
Info: "Type of work" is not fixed and can be individually varied. Apart from the topics below there are often more topics. Do not hesitate to ask!
Investigation of absorption and emission spectra of solutions
Bachelor Project or Bachelor Thesis
Description
Measure and analyze the absorption and transmittance of solutions when factors such as path length, fill height of the solution, concentration of the indicator dye changes.
Starting: immediately
Requirements: Interest in Optoelectronics, Interest in 3D design
Contact:Varuni Rathnayake
pH measurements using image processing methods
Bachelor Project or Bachelor Thesis
Description
Indicator dyes can be used to determine pH of a solution. A method has to be proposed and implemented by image processing methods to extract color information to identify color that corresponds to pH values.
Starting: immidiately
Requirements: Microcontroller programming (Raspberry pi), knowledge on image processing
Contact: Varuni Rathnayake
Strain Gauge Sensor Circuit
Bachelor Project
Description
The output voltage of a wheatstone bridge incorporating a strain gauge sensor will be amplified and fed to a digital circuit to control a display.
Determine the impact of various heatsinks by determining the thermal conductivity of silica aerogels
Bachelor Thesis
Description
Design a flexible chip with heater strcutures and temperature sensors. Then manufacture bulk aerogel samples. Preferablly, design a PCB or similar to connect the sensor to the measurement devices. Use the 'Absolute Method' to determine the thermal conductivity and vary the setup with different heatsinks and repeat the measurements with reinforced silica aerogels (CNTs + PEG)
Starting: immidiately
Requirements: Interest in PCB design, 3D design, Chip/Sensor fabrication in the cleanroom and building up a measurement setup.
Contact: Tim de Rijk
Process development for anodic bonding at low temperatures
Bachelor Project
Description
Anodic bonding of glass wafers and silicon wafers is typically done at about 400C. A bonding process at <200C is to be developed using Lithium-containing glass or interlayers between the bonded wafers. The bonding experiments are carried out in the cleanroom. The bond quailty in therms of bond strenght, reliability is to be analysed.
Starting: immidiately
Requirements: Interest in cleanroom fabrication and meaterial science
Contact: Henrik N?bel
Heart-rate detection Circuit
Bachelor Project
Description
Measure the heart-rate with a light source and a detector. The variation of blood volume can be measured and detected. An analog circuit must be build that contains a filtering and ampflication stage.
Sensing of various ionic species utilizing Organic Electrochemical Transistor based ion sensors
Master Thesis or Master Project
Description
Organic electrochemical transistor (OECT) is a three terminal device that operates by interaction of ionic and electronic charge inside a semiconducting organic material (PEDOT:PSS). Due to the direct interplay of electrolyte with organic channel, OECTs are emerging as promising bio and ion sensors. A wide range of ions are part of our nutrition and play an essential role in healthy functionalization of human body. The goal of this master thesis/project is to detect multiple concentrations of ions such as Na+ and Ca2+ and characterize the device parameters such as sensitivity and limit of detection.
Starting: immidiately
Requirements: Master student of CMM, CIT, Electrical Engineering, Chemistry or similar, Interest in sensor development and characterization, Knowledge of data analysis software (Origin Pro, Python or MATLAB or similar), Interest in learning cleanroom technologies, Knowledge of Overleaf/LaTeX software would be a plus.
Contact: Kapil Tagale
Characterization of organic polymer based mixed ionic-electronic semiconductor (PEDOT:PSS) treated at different range of temperature and additives
Bachelor Project
Description
Organic mixed ionic-electronic conductors (OMIECs) such as PEDOT:PSS plays a crucial transducer role in biosensing and switching applications. Therefore, the stability and repeatability of OMIECs becomes very vital. In their pristine form, the conductivity of such transducing materials is lower than required range. The purpose of this project work is to study the performance of PEDOT:PSS based on different solvent treatment, baking temperature and baking time, Deposition of PEDOT:PSS film on OECTs, CV, EIS and transfer characteristics, Spectro-electrochemical characterization
Starting: immidiately
Requirements: Bachelor student of Electrical Engineering, electrochemistry, material science or similar, Interest in material development and characterization, Knowledge of data analysis software (Origin Pro, Python, MATLAB or similar), Knowledge of Overleaf/LaTeX software would be a plus.
Contact: Kapil Tagale
Structuring and Optimization of ion selective membrane on OECTs
Master Project
Description
Organic electrochemical transistors (OECTs) have attracted a lot of attention because of their adaptability in neuromorphic computing, bioelectronics, and sensing technologies. It is a three-terminal device (Source, Drain and Gate) where the organic semiconducting material poly(3,4-ethylenedioxythiophene) polystyrene sulfonate (PEDOT: PSS). The human body sweat contains various analytes and salts which makes it a challenge for the OECTs to determine a particular analyte. On the other hand, Ion selective membranes show a wide linear range and high selectivity and hence offers detection of specific ions.
Starting: immidiately
Requirements: Master student of CMM, CIT, Electrical Engineering, Chemistry or similar, Interest in learning organic electronics.
Contact: Sumantha Aithal Panambur