PhD Proposal by Zhaonan Liu

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THE SCHOOL OF MATERIALS SCIENCE AND ENGINEERING     GEORGIA INSTITUTE OF TECHNOLOGY      Under the provisions of the regulations for the degree    DOCTOR OF PHILOSOPHY    on Tuesday, November 8, 2022 11:00 AM   via   Zoom Videoconferencing https://gatech.zoom.us/j/94991934416?pwd=clp0YlhxZWVoWjdualducHFqOHNXUT09 will be held theDISSERTATION PROPOSAL DEFENSE    forZhaonan Liu" Impedance-Based In-Line Cell Growth Sensors for Cell Manufacturing"Committee Members:Prof. Ben Wang, Co-advisor, MSE/ISyE/ME Prof. Chuck Zhang, Co-advisor, ISyE Prof. Donggang Yao, MSE Kan Wang, PhD, ISyE Prof. Rosario Gerhardt, MSE   Abstract:   Cell manufacturing is a fast-growing industry as cell therapies show their unparalleled capabilities to treat diseases that humans have never found a cure. Cell density is a critical quality attribute (CQA) in the cell manufacturing process that serves as a key decision-making factor. Impedance/dielectric spectroscopy (IS/DS) has been widely used for biomass monitoring since the 1930s. The development of high-performance computing devices and artificial intelligence in recent decades has expedited the measuring and analysis of IS/DS, enabling this technique to monitor biomass in real time. However, there is still an abundance of mysteries unrevealed and opportunities unexplored in this complicated technique. The mechanism of low-frequency dielectric dispersion (LFDD) is not fully clear to date. The applications of IS/DS in intricated bioreactors, such as hollow fiber bioreactors, are seldom discussed. This work is based on a comprehensive understanding of IS/DS and its application in biomass sensing and focuses on the underexplored aspects of this technology. Novel theoretical, experimental, and analytical methods have been developed in this work. Those new methods also have the potential to be applied to other sensing scenarios.  


  • Workflow Status: Published
  • Created By: Tatianna Richardson
  • Created: 10/25/2022
  • Modified By: Tatianna Richardson
  • Modified: 10/25/2022