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Self-Assembly and Transport in Chemical and Physical Networks /

Record Type:	Electronic resources : Monograph/item
Title/Author:	Self-Assembly and Transport in Chemical and Physical Networks /Dingwen Qian.
Author:	Qian, Dingwen,
Description:	1 electronic resource (137 pages)
Notes:	Source: Dissertations Abstracts International, Volume: 86-02, Section: B.
Notes:	Advisors: Olvera de la Cruz, Monica Committee members: Schatz, George; Bedzyk, Michael.
Contained By:	Dissertations Abstracts International86-02B.
Subject:	Applied physics.
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=31331206
ISBN:	9798384018339

Self-Assembly and Transport in Chemical and Physical Networks /
Qian, Dingwen,

Self-Assembly and Transport in Chemical and Physical Networks /Dingwen Qian. - 1 electronic resource (137 pages)

Source: Dissertations Abstracts International, Volume: 86-02, Section: B.

After Albert Einstein's extraordinary insight into Brownian motion and Jean Baptiste Perrin's seminal study of Brownian motion of particle suspensions, humanity realized that matter is composed of atoms and molecules. How these tiny building blocks assemble into the colorful and complex world remains a question for all curious minds. Due to the existence of highly oriented and saturated interactions, network structures emerge as an important morphology for materials. Regarding the self-assembly process, I developed a phenomenological model of the nucleation and growth of hydrogen-bonded organic frameworks. The minimal model captures the complicated free energy landscapes of the network structure and predicts that the dominant product is sensitive to experimental conditions. We then proceed to a natural application of the network structure. Covalent organic framework (COF) membranes are known for their tunable pore sizes, which make them an ideal candidate for water purification and desalination. However, the morphology of COF membranes is not well understood due to their polycrystalline nature. The mechanism of size-sieving purification is therefore questionable. Experiments reveal that adsorption is an alternative mechanism to the filtration mechanism. My theoretical model provides important insights into why large dye molecules tend to have higher affinities for the membranes, explaining why people believe the plausible explanation of size-sieving filtration. The transport inside the network structure is highly coupled to the geometry of the host matrix. When the network is vibrating, the nonequilibrium transport is coupled to the vibrational degrees of freedom. We observe an interesting soliton-like excitation in the far-from-equilibrium regime.

English

ISBN: 9798384018339Subjects--Topical Terms:

795462
Applied physics.
Subjects--Index Terms:

Graph theory

Self-Assembly and Transport in Chemical and Physical Networks /
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520 $a After Albert Einstein's extraordinary insight into Brownian motion and Jean Baptiste Perrin's seminal study of Brownian motion of particle suspensions, humanity realized that matter is composed of atoms and molecules. How these tiny building blocks assemble into the colorful and complex world remains a question for all curious minds. Due to the existence of highly oriented and saturated interactions, network structures emerge as an important morphology for materials. Regarding the self-assembly process, I developed a phenomenological model of the nucleation and growth of hydrogen-bonded organic frameworks. The minimal model captures the complicated free energy landscapes of the network structure and predicts that the dominant product is sensitive to experimental conditions. We then proceed to a natural application of the network structure. Covalent organic framework (COF) membranes are known for their tunable pore sizes, which make them an ideal candidate for water purification and desalination. However, the morphology of COF membranes is not well understood due to their polycrystalline nature. The mechanism of size-sieving purification is therefore questionable. Experiments reveal that adsorption is an alternative mechanism to the filtration mechanism. My theoretical model provides important insights into why large dye molecules tend to have higher affinities for the membranes, explaining why people believe the plausible explanation of size-sieving filtration. The transport inside the network structure is highly coupled to the geometry of the host matrix. When the network is vibrating, the nonequilibrium transport is coupled to the vibrational degrees of freedom. We observe an interesting soliton-like excitation in the far-from-equilibrium regime.
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653 $a Particle suspensions
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