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Jiarui Yan_Thesis.pdf (5.31 MB)

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Kinetics and Ensemble Dynamics of Colloidal Ellipsoids near an AC Electrode

Yan, Jiarui,
http://rave.ohiolink.edu/etdc/view?acc_num=csu1537378570394163

Abstract Details

2018, Master of Science in Chemical Engineering, Cleveland State University, Washkewicz College of Engineering.
The manipulation of colloidal particles via applying electric fields has been studied over the past 30 years due to the unique properties associated with the fabricated colloidal crystals. Most works in this field focused on utilizing an alternating current (AC) electric field with spherical particles. However, utilizing spherical colloidal particles as building blocks for complex microstructures has been challenging. Consequently, more recent work has shifted to employing complex colloids (anisotropic in nature) as building blocks for advanced materials. In our work, the phase diagram and the kinetics of assembling colloidal polystyrene ellipsoids under an AC electric field at low frequencies were studied. Specifically, the structure of colloidal ellipsoid ensembles under varying electric field potentials (0.5 V, 1.0 V, and 1.5 V) was measured at a periodically regulated frequency (30 Hz ~ 3000 Hz) and the same set of experiments was done for colloidal spheres as a comparable reference. Data suggested the approximate critical frequency for assembled particles depended on the aspect ratio and the inherent block anisotropy may impact the mesoscale structure. Additionally, the rate constant for the rapid aggregation of colloidal particles was calculated via the plot of singlet evolution at varying electric field conditions. Results showed an increase in applied potential and a larger aspect ratio for the colloidal ellipsoids both resulted in a larger rate constant.
Christopher Wirth (Advisor)
Geyou Ao (Committee Member)
Shawn Ryan (Committee Member)
Chemical Engineering

Recommended Citations

Citations

  • Yan, , J. (2018). Kinetics and Ensemble Dynamics of Colloidal Ellipsoids near an AC Electrode [Master's thesis, Cleveland State University]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=csu1537378570394163

    APA Style (7th edition)

  • Yan, , Jiarui. Kinetics and Ensemble Dynamics of Colloidal Ellipsoids near an AC Electrode. 2018. Cleveland State University, Master's thesis. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=csu1537378570394163.

    MLA Style (8th edition)

  • Yan, , Jiarui. "Kinetics and Ensemble Dynamics of Colloidal Ellipsoids near an AC Electrode." Master's thesis, Cleveland State University, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=csu1537378570394163

    Chicago Manual of Style (17th edition)

csu1537378570394163
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© 2018, all rights reserved.
This open access ETD is published by Cleveland State University and OhioLINK.