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Nanostructured Polymeric Materials a...

Chado, Garrett R.

Nanostructured Polymeric Materials and Their Implementation in Enhancing Biocatalytic Processes.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Nanostructured Polymeric Materials and Their Implementation in Enhancing Biocatalytic Processes.
作者:	Chado, Garrett R.
出版者:	Ann Arbor : ProQuest Dissertations & Theses, 2018
面頁冊數:	181 p.
附註:	Source: Dissertation Abstracts International, Volume: 80-05(E), Section: B.
附註:	Adviser: Joel L. Kaar.
Contained By:	Dissertation Abstracts International80-05B(E).
標題:	Chemical engineering.
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=10933966
ISBN:	9780438766686

Nanostructured Polymeric Materials and Their Implementation in Enhancing Biocatalytic Processes.
Chado, Garrett R.

Nanostructured Polymeric Materials and Their Implementation in Enhancing Biocatalytic Processes. - Ann Arbor : ProQuest Dissertations & Theses, 2018 - 181 p.

Source: Dissertation Abstracts International, Volume: 80-05(E), Section: B.

Thesis (Ph.D.)--University of Colorado at Boulder, 2018.

Polymer science has played a pivotal role in the development of nanotechnology. Self-assembly of polymeric materials at the molecular-level enables the fabrication of periodic arrays of nanostructures with various geometries and sizes, which present exciting opportunities in fabrication of nanoscale devices. However, self-assembled structures are often too regular for use in fabricating complex devices. Therefore, a simple layer-by-layer method was developed to allow for quantitative control over both size and shape of equilibrium nanostructures in self-assembled block copolymer thin films. The use of photolithography imparted spatial control over the self-assembly process.

ISBN: 9780438766686Subjects--Topical Terms:

206267
Chemical engineering.

Nanostructured Polymeric Materials and Their Implementation in Enhancing Biocatalytic Processes.
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520 $a Polymer science has played a pivotal role in the development of nanotechnology. Self-assembly of polymeric materials at the molecular-level enables the fabrication of periodic arrays of nanostructures with various geometries and sizes, which present exciting opportunities in fabrication of nanoscale devices. However, self-assembled structures are often too regular for use in fabricating complex devices. Therefore, a simple layer-by-layer method was developed to allow for quantitative control over both size and shape of equilibrium nanostructures in self-assembled block copolymer thin films. The use of photolithography imparted spatial control over the self-assembly process.
520 $a Such self-assembly can result in structures approaching the size of single biomacromolecules, potentially enabling the precise placement of individual enzymes. Using these nanostructured thin films as inspiration, the effect of nanopatterning enzymes for multi-step biocatalysis was explored numerically by developing a kinetic Monte Carol simulation. Molecular trajectories of the reaction species as well as turnover frequency of individual enzymes on the surface were tracked under diffusion-limited and reaction-limited conditions. Interestingly, these simulations revealed that enzyme density and arrangement have little impact on overall activity of the multi-enzyme cascade reaction.
520 $a Given these results, we turned our attention to improving enzymatic activity by covalent modification of the enzyme with polymeric materials. This covalent modification holds tremendous promise as an approach to tune the molecular-level interactions between enzymes and their solvent environments. Enzymes modified with highly soluble polymers had greatly improved solubility in an ionic liquid. This correlated with increases of up to 19-fold in enzyme activity. However, because the preparation and purification of enzymes can be costly, the loss of recyclability of the newly homogeneous enzyme-polymer conjugates was undesirable. By utilizing a responsive polymeric material, the miscibility of the enzyme can be altered adaptively. Specifically, thermodynamic interactions between the enzyme-polymer conjugate and solvent were varied as a function of temperature by utilizing a thermoresponsive polymer. When recycled via sequential dissolution and precipitation, the enzyme did not lose any activity. This approach enables the benefits of both increased activity of homogeneous biocatalysis and improved processability of heterogeneous biocatalysis in non-native solvents.
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