Exploring metal nitride synthesis from precursors to structural insights

Metal nitride nanocrystals are a versatile class of nanomaterials with a wide range of
optical properties, depending on their chemical composition. These properties can vary
from those typical of traditional semiconductor nanocrystals, often referred to as quantum
dots, to more metallic character, featuring plasmon resonance. However, the synthesis
of colloidal metal nitride nanocrystals presents unique challenges due to the less
developed precursor chemistry compared to other nanocrystal systems, such as metal,
metal chalcogenide, or metal phosphide nanocrystals.
This thesis begins with a comprehensive literature review of current synthetic methods
for producing metal nitride nanocrystals, with a primary focus on chemical conversion
reactions, laying the foundation for our research. Our investigation focuses on
copper nitride (Cu3N), a well-studied metal nitride synthesized via wet chemistry. We
explore the precursor conversion process and the complexities of surface chemistry associated
with Cu3N. Building upon the insights gained from Cu3N chemistry, we investigate
various wet chemical approaches aimed at developing methodologies for producing
colloidally stable metal nitrides at relatively low temperatures.
Recognizing that some nitride formations require higher temperatures to achieve
crystalline materials, we delve into the realm of solid-state chemistry. Our work provides
an in-depth examination of solid-state-based synthesis methods, particularly focusing on
titanium nitride metal nitrides.
Finally, we turn our attention to the surface chemistry for nanocrystals, with a
specific focus on the use of silane as a versatile ligand. Throughout this thesis, we aim to
comprehensively cover synthetic strategies, chemical complexities, and surface chemistry
aspects associated with metal nitride nanocrystals. The insights provided in this work
are intended to serve as a valuable guide for the further development and applications
of colloidal nitride nanocrystals in various fields of nanoscience and technology.