Home > Seminars > CBE Graduate Student Presentations; Gongchen Sun & Hythem Sidky

CBE Graduate Student Presentations; Gongchen Sun & Hythem Sidky

Start:

4/18/2017 at 12:30PM

End:

4/18/2017 at 1:30PM

Location:

155 DeBartolo Hall

Host:

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William Schneider

William Schneider

VIEW FULL PROFILE Email: wschneider@nd.edu
Phone: 574-631-8754
Website: http://www.nd.edu/~wschnei1/
Office: 123B Cushing Hall

Affiliations

Department of Chemical and Biomolecular Engineering H. Clifford and Evelyn A. Brosey Professor of Engineering
College of Engineering H. Clifford and Evelyn A. Brosey Professor of Engineering
The goal of research in the Schneider group is to develop molecular-level understanding, and ultimately to direct molecular-level design, of chemical reactivity at surfaces and interfaces. This heterogeneous chemistry is a key element of virtually every aspect of the energy enterprise, and is ...
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Gongchen Sun:

Towards Integrated Ionic Circuits

Microfluidic-based ionic circuits are emerging tools to precisely control ions and biomolecules transport in numerous biomedical applications, ranging from point-of-care diagnostic devices to implantable therapeutic platforms. However, current ionic circuit devices suffer from low throughput and a lack of memory function, which makes it impossible for them to sustain enough ion and molecular fluxes for cascade ionic signal transmission and large-scale integration. In this talk, I will discuss my work on novel ionic circuit devices to overcome aforementioned limitations. Firstly, by using a microfluidic-ion exchange membrane hybrid strategy, I will introduce a high-flux ionic diode/transistor for rapid molecule manipulation, separation and concentration. Secondly, based on a reversible redox reaction on a silicon microelectrode, I will present an ionic memristor to digitize and memorize ionic current signals for large-scale integration of ionic circuits. At last, I will discuss using such integrated ionic circuits for multiplex liquid biopsy applications. 

Hythem Sidky:

Toward molecular engineering of liquid crystal elasticity

The difficulties associated with laboratory measurement of elastic constants present computational methods as an attractive option for understanding the elastic properties of new molecules. Free energy perturbation (FEP) has emerged as a powerful and effective method to obtain liquid crystal elasticities from molecular simulation. In this talk, we explore the application and extension of this methodology through the study of coarse-grained and atomistic liquid crystal models. A systematic analysis of the elastic constants of Gay-Berne systems demonstrates the scalability and simplicity of this method. We further extend it to the study of molecular 5CB and its homologues. This represents a milestone in material property prediction and lays the foundation for computationally-guided molecular design of novel mesogenic compounds.

Seminar Speaker:

CBE Students

   

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