Abstracts Category : Other

Add abstract

Want to add your dissertation abstract to this database? It only takes a minute!

Search abstract

Search for abstracts by subject, author or institution

Share this abstract

Modeling of atomic layer deposition on nanoparticle agglomerates

by W Jin



Abstract

Nanoparticles are increasingly applied in a range of fields, such as electronics, catalysis, energy and medicine, due to their small sizes and consequent high surface-volume ratio. In many applications, it is attractive to coat the nanoparticles with a layer of different materials in order to gain new functionalities. For instance, a coated layer can modify the chemical properties of the nanoparticles, protect the core material resulting in increased stability, facilitate the biofunctionalization, etc. Atomic layer deposition (ALD) is a gas-phase technique that can form an ultrathin solid film on a range of substrates. It utilizes two self-limiting surface reactions applied in an alternating sequence. By controlling the number of applied cycles, the thickness of the coated layer can be controlled with nanometer precision. Several experimental reports in literature have shown that applying ALD to nanoparticles using a fluidized bed is a promising way of producing large quantities of coated nanoparticles. Fluidization is a gas-phase technique that can process large quantities of particles by suspending them in an upward gas stream. It provides good gas-solid mixing, scale-up potential, and allows continuous processing. However, due to the strong cohesive forces between particles, nanoparticles cluster into large agglomerates when fluidized. These agglomerates have a complex, hierarchical structure, which has been commonly described as fractal for their self-similarity under different length scales. During the ALD process, the precursors have to diffuse into such structures to reach the surface of inner particles.Advisors/Committee Members: Kleijn, C.R., van Ommen, J.R., Delft University of Technology.

Add abstract

Want to add your dissertation abstract to this database? It only takes a minute!

Search abstract

Search for abstracts by subject, author or institution

Share this abstract

Featured Books

Book cover thumbnail image
Electric Cooperative Managers' Strategies to Enhan...
by White, Michael Edward
   
Book cover thumbnail image
Bullied! Coping with Workplace Bullying
by Gattis, Vanessa M.
   
Book cover thumbnail image
The Filipina-South Floridian International Interne... Agency, Culture, and Paradox
by Haley, Pamela S.
   
Book cover thumbnail image
Solution or Stalemate? Peace Process in Turkey, 2009-2013
by Yurtbay, Baturay
   
Book cover thumbnail image
Performance, Managerial Skill, and Factor Exposure...
by Avci, S. Burcu
   
Book cover thumbnail image
The Deritualization of Death Toward a Practical Theology of Caregiving for the ...
by Gibson, Charles Lynn
   
Book cover thumbnail image
Emotional Intelligence and Leadership Styles Exploring the Relationship between Emotional Intel...
by Olagundoye, Eniola O.
   
Book cover thumbnail image
Commodification of Sexual Labor Contribution of Internet Communities to Prostituti...
by Young, Jeffrey R.
   
Book cover thumbnail image
The Census of Warm Debris Disks in the Solar Neigh...
by Patel, Rahul I.
   
Book cover thumbnail image
Risk Factors and Business Models Understanding the Five Forces of Entrepreneurial R...
by Miles, D. Anthony