Chemical modification of silicon surfaces through functionalization with novel diruthenium molecules
Abstract
Silicon surfaces can be covalently functionalized with both inorganic and organic molecules through the formation of C-Si bonds. This area of research is instrumental in the development of new semiconductor hybrid materials for use in both microelectronic and photovoltaic applications. Inorganic molecules such as diruthenium can be used to chemically modify the silicon surface. The objective of this research has been both the synthesis of new diruthenium compounds and the preparation of diruthenium functionalized silicon surfaces through wet chemical and photochemical techniques. A variety of diruthenium molecules were synthesized for use in silicon surface functionalization experiments. The investigation of the electronic properties of these compounds as new bidentate ligands are attached is crucial for their use in microelectronic devices. Ligand exchange reactions were performed to substitute acetate ligands on Ru2(OAc)4Cl with various formamidinate ligands to obtain compounds with better labiality and electronic properties for use in silicon surface modification. Successful deposition of 1-decene, 10-undecylenic acid, octadecene, and Ru2(D(3,5-Cl2Ph)F)3(μ-CCH2CH 2CH2CH=CH2)Cl moieties on Si(111) and Ru 2(DmAniF)3(μ-O2CH(CH2)8CH=CH 2)Cl on porous Si(100) was achieved through microwave and thermal heating methods. These diruthenium functionalized surfaces can be used in the future to study the charge transfer at the molecular semiconductor junction and also the capacity of molecular spin to modulate the current of semiconductor channels. Control over the surface chemistry of new materials is essential for constructing and fine-tuning performance of novel Si devices.
Degree
M.S.
Advisors
Ren, Purdue University.
Subject Area
Inorganic chemistry|Materials science
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