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UID:event-17@tuemeche.nl
DTSTAMP:20261008T003101Z
DTSTART;TZID=Europe/Amsterdam:20260917T160000
DTEND;TZID=Europe/Amsterdam:20260917T173000
SUMMARY:Monolithic processing of organic polymers for highly integrated c
 ircuits
DESCRIPTION:Speaker: Charles-Théophile Coen\nHost: Yoeri van de Burgt\n\
 nIn recent years\, our society has become increasingly connected. At the 
 same time\, wearable technologies\, such as smartwatches and health track
 ers\, have rapidly evolved\, making it possible to monitor a wide range o
 f physiological and behavioral signals. As the demand for more detailed a
 nd meaningful health data grows\, the devices that collect and process th
 is information must also become more advanced. This often requires more c
 omplex sensors and computing systems\, as well as the use of machine lear
 ning to identify patterns and combine different types of data.\n\nTo make
  these technologies truly practical for everyday use\, devices must be sm
 all\, energy-efficient\, flexible\, and ideally able to interact directly
  with the human body. A promising class of materials for this purpose is 
 known as organic mixed ionic-electronic conductors (OMIECs). These materi
 als can transport both ionic and electronic charges\, which is a unique a
 nd valuable property. Biological systems\, such as the human body\, prima
 rily rely on ions to transmit signals\, while conventional electronics re
 ly on electrons. OMIECs provide a bridge between these two worlds\, enabl
 ing more natural and effective communication between electronic devices a
 nd biological systems.\n\nDevices called organic electrochemical transist
 ors (OECTs) can be made using OMIECs. These transistors are particularly 
 well-suited for wearable and bioelectronic applications because they oper
 ate at low power and can be designed to mimic how the body processes and 
 transmits information. By taking inspiration from biological systems\, th
 is approach\, often referred to as neuromorphic sensing and computing\, h
 as the potential to improve how devices interact with the body.\n\nDespit
 e these advantages\, OMIECs present important challenges. Traditional man
 ufacturing techniques used for electronic devices were developed for inor
 ganic materials and are not well-suited for these organic materials. Whil
 e alternative fabrication methods exist\, they often struggle with consis
 tency\, scalability\, or the ability to integrate multiple OMIEC material
 s into a single device\, an important requirement for more advanced syste
 ms.\n\nIn this thesis\, new fabrication techniques are developed to addre
 ss these limitations. The approach is based on direct photopatterning\, a
  process in which ultraviolet (UV) light is used to define structures in 
 a material. When exposed to UV light\, the material undergoes a chemical 
 reaction that makes it insoluble\, while unexposed regions can be removed
  using a solvent. This method is compatible with widely used manufacturin
 g processes and does not require specialized equipment. As a result\, it 
 enables the creation of reproducible and scalable device structures. Impo
 rtantly\, it also allows different OMIEC materials to be patterned on the
  same substrate without compromising their performance.\n\nFinally\, this
  work explores how OECTs perform in biological environments\, which is es
 sential for their use in real-world applications. One application studied
  is the measurement of ion concentrations in sweat. This type of sensing 
 can provide valuable information about a person’s physiological state w
 ithout the need for invasive procedures such as blood sampling. In additi
 on\, the stability of these devices in biological conditions is investiga
 ted\, as long-term reliability is critical for their future use.\n\nOvera
 ll\, this research contributes to the development of more practical and r
 eliable bioelectronic devices. By improving the methods used to manufactu
 re them\, it helps pave the way for the next generation of wearable techn
 ologies that can seamlessly interact with the human body.\n\nMore info: h
 ttps://tuenl.sharepoint.com/sites/intranet-mechanical-engineering/_layout
 s/15/Event.aspx?ListGuid=9bfaaae6-070c-4371-810d-a43d7ee02bf2&ItemId=242
LOCATION:Atlas 0.710
URL:https://tuemeche.nl/peoplepages/event.php?id=17
CATEGORIES:PhD Defense
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