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Chemistry Ph.D. Defense: Reem Khan

By Jake Newman / February 16, 2024

Department and Chemistry and Biomolecular Science

Clarkson University

Chemistry Ph.D. Defense

Reem Khan

Advisor: Dr. Silvana Andreescu

Will speak on

Nanotechnology-based approaches for electrochemical detection of contaminants of emerging concern;

Abstract: The presence of environmental contaminants such as pharmaceuticals and personal care products, endocrine disrupting compounds (EDCs), viruses and bacteria, per/poly-fluorinated substances (PFAS), pesticides, and heavy metals poses significant challenges to the environment and human health. Current approaches to measure environmental contaminants involve extensive sample collection, treatment and the use of laboratory-based instrumentation such as chromatographic methods (HPLC, GC-MS) that require multiple steps and high operational expenditures, which limit the number of samples that can be tested. The goal of this thesis is to explore the use of nanomaterials as transducer interfaces for designing electrochemical devices for rapid and inexpensive detection of emerging environmental contaminants. To accomplish this goal, we first studied the interaction of selected nanomaterials and 2D structures with environmental contaminants, determined changes in surface properties and functionalities upon target binding, and established design strategies that enable selective recognition and detection with focus on the emerging class of PFAS contaminants. Moreover, various electrochemical techniques such as single particle collision electrochemistry, chronoamperometery, differential pulse voltammetry, cyclic voltammetry and electrochemical impedance spectroscopy are used to study the interaction of contaminants with nanoscale surfaces and characterize the proposed electrochemical sensors. Once this fundamental knowledge is established, we developed electrochemical sensors and methods for rapid and ultrasensitive detection of these chemicals, characterize their analytical performance and capabilities for field analysis and deployment. The ultimate outcome of this work will be in the development of novel detection principles and methods for environmental monitoring.

Friday Feb 23, 2024. 10.00 A.M

B.H. Snell 330 Peterson Board Room

Join on Zoom Meeting ID: 706 179 7305

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