Document Type



Doctor of Philosophy (PhD)


Electrical and Computer Engineering

First Advisor's Name

Dr. Frank Urban

First Advisor's Committee Title

Committee Chair

Second Advisor's Name

Dr. Nezih Pala

Second Advisor's Committee Title

Committee Member

Third Advisor's Name

Dr. Sakhrat Khizroev

Third Advisor's Committee Title

Committee Member

Fourth Advisor's Name

Dr. Pezhman Mardanpour

Fourth Advisor's Committee Title

Committee Member

Fifth Advisor's Name

Dr. Chunlei Wang

Fifth Advisor's Committee Title

Committee Member


Nanotechnology, Nanostructured Materials, Artificial Magnetic Layers, Three-Dimensional Artificial Magnetic Multilayer, Magnetic Characterization, Multilayer Graphene, In-Situ Synthesis, Zinc-Oxide Graphene, Gas sensor, DFT

Date of Defense



Nanotechnology is considered to bring upon the next industrial revolution. This “Nano Giant” is capable of influencing and changing every social field by offering new tools and discovering novel phenomena for seemingly endless applications. Nanotechnology is currently expanding from research to industrialization and commercialization; however, the leap is not a straightforward path. The fabrication of nanostructures requires highly advanced and complex machinery which increases production costs. Therefore, it seems wise to adapt some processes in current microelectronic fabrication infrastructure and to find other less costly techniques. The field of thin films is a well stablished field which has become one of the major building blocks in nanotechnology. At the nanometer and even the atomic level, the microstructure of thin films interfaces and surfaces need to be further understood in order to build suitable nano-systems for the intended application. The work on this dissertation consists of the synthesis, characterization, and modeling of different nanostructured materials for electronic and sensing applications. The dissertation covers three different areas on nanoscience projected to impact different aspects of the industry which are storage density, graphene synthesis and nanostructured sensors. Today, data consumption increases rapidly daily, increasing the demand for data storage. To increase data storage needs, this dissertation studied suitable techniques of fabrication that guarantees continuous and uniform perpendicular anisotropy in volumetric three- dimensional artificial magnetic multilayer structures. Additionally, the optimal characterization method was demonstrated to be through Alternating Gradient Magnetometer. Graphene has resulted in a Nobel Prize for its extraordinary properties and possibilities. However, its synthesis is one of the major factors to achieve and maximize its potential. A novel method to synthesize high quality multilayer graphene, faster, inexpensively, and locally, not only on metal surfaces, but also onto substrates was developed. Furthermore, one of graphene’s many applications is for gas sensing. Nevertheless, pristine graphene has shown low sensitivity towards common toxic gasses. Through computational analysis, it has been proven that a Zinc Oxide-Graphene hybrid nanostructure device has great potential for improving the detection of NO and NO2, as well as a catalyst for H2S dissociation, and even effective under humid air.




Previously Published In

I. Torres, S. M. Aghaei, A. R. Baboukani, C. Wang, and S. Bhansali, “Individual gas molecules detection using zinc oxide–graphene hybrid nanosensor: a DFT study,” C J. Carbon Res., vol. 4, no. 3, p. 44, 2018.

I. Torres, S. M. Aghaei, N. Pala, and A. Gaitas, “In-Situ Synthesis Of Multilayer Graphene On Tin Film Via Localized Heating Of Amorphous Carbon Using An Electrothermal Cantilever Nanoprobe,” presented at the Tranducers 2021, Online, 2021.

Creative Commons License

Creative Commons Attribution-Noncommercial-No Derivative Works 4.0 License
This work is licensed under a Creative Commons Attribution-Noncommercial-No Derivative Works 4.0 License.

Available for download on Thursday, July 10, 2025



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