Controlling selectivity of platinum deposition on partially exchanged Cu2-xS-CdS nanoparticles
Open Access
- Author:
- Ackerman, Jonathan
- Graduate Program:
- Chemistry
- Degree:
- Master of Science
- Document Type:
- Master Thesis
- Date of Defense:
- July 25, 2019
- Committee Members:
- Raymond Edward Schaak, Thesis Advisor/Co-Advisor
John B Asbury, Committee Member
Benjamin James Lear, Committee Member
Philip C Bevilacqua, Program Head/Chair - Keywords:
- nanoparticle
Chalcogenide
Cation exchange
partial cation exchange
Seeded growth - Abstract:
- As the applications of nanotechnology become more advanced, the need for the ability to synthesize more complex nanomaterials. Nanoparticles, in particular, have found application in sensing, catalysis, biomedicine and other fields utilizing increasingly complex systems. Already there are systems that have been proposed that cannot be made through existing syntheses, such as a z-scheme trimer nanoparticle similar to the powder-based system developed by Maeda et. al. In order to enable the continued development of both the applications and our understanding of these systems, we first need to advance our ability to synthesize novel, complex nanoparticle systems. Developing novel hybrid nanoparticles, in which multiple solid domains are connected through a solid-solid interface, is one route that is of particular interest. These particles allow for cooperative effects that are not possible through organic linkages, such as the enhancement of the catalytic activity of Au and Pt nanoparticles via the addition of Fe3O4 observed by Sun et. al. However, developing hybrid systems with three or more solid material domains requires the ability to control the arrangement of the domains to achieve the desired configuration. While strategies analogous to the protection/deprotection techniques used in organic synthesis have been developed, a deeper understanding of factors governing the selectivity of a deposited material for a particular domain in a hybrid nanoparticle is essential for the development of more generalized and higher yield synthetic protocols. In this work, we explore the factors that lead to the selective deposition of Pt on Cu2-xS-CdS nanorod and the factors that led the selectivity inversion observed by Fenton et. al. in the deposition onto Cu2-xS-CdS nanoparticles.