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Optimized Synthesis of MXenes with Diverse Chemical Functionalizations, High Structural Quality, and Large Flake Size
Abstract
In 2011, a new member of 2D materials was discovered and termed MXenes. MXenes are generally produced by selectively etching away the "A" layer of intrinsically layered ceramic materials called MAX phases, leaving 2D sheets functionalized with various groups such as -OH, -F, -Cl, etc. MXenes have many of the same unique properties as other 2D materials, such as high flexibility, Young's modulus, and electrical conductivity; however, they have some additional properties, such as processability in both aqueous and organic media, that push them to the higher hierarchy of 2D materials as unique candidates for a wide range of applications. However, the research on MXenes is limited to one member, Ti3C2Tx. Additionally, the high-quality single-layer flake production of MXenes is in short supply and limited to a few members, imposing limitations on other aspects of MXene research. A perspective on the challenges and opportunities in the field of MXene synthesis is presented in chapter one. The following chapters summarize the results of our attempts to address a few of the abovementioned issues, as well as other avenues of research involving MXenes that we probed. In the second chapter, we proposed a general strategy for interlayer incorporation of A-elements into MXenes to expand the MXene materials further. In chapter three, we improved the chemical etching process for the Cr2TiC2Tx MXene and produced high-quality 2D sheets for studying their intrinsic properties. The fourth chapter explored the surface modification of MXenes to control their surface chemistry and functionality and studied their applications in the trace detection of heavy metals. Finally, In the fifth chapter, we investigated the high-yield fabrication of monolayer devices for Nano Electromechanical Systems (NEMS).
Subject Area
Chemistry|Materials science|Nanotechnology|Physical chemistry
Recommended Citation
Bagheri, Saman, "Optimized Synthesis of MXenes with Diverse Chemical Functionalizations, High Structural Quality, and Large Flake Size" (2023). ETD collection for University of Nebraska-Lincoln. AAI30489427.
https://digitalcommons.unl.edu/dissertations/AAI30489427