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Fabrication and characterization of ...

Ho, Dean.

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Fabrication and characterization of biomolecule-copolymer hybrids as energy conversion systems.

Record Type:	Electronic resources : Monograph/item
Title/Author:	Fabrication and characterization of biomolecule-copolymer hybrids as energy conversion systems./
Author:	Ho, Dean.
Description:	126 p.
Notes:	Source: Dissertation Abstracts International, Volume: 66-05, Section: B, page: 2693.
Contained By:	Dissertation Abstracts International66-05B.
Subject:	Engineering, Biomedical. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3175211
ISBN:	0542134667

Fabrication and characterization of biomolecule-copolymer hybrids as energy conversion systems.
Ho, Dean.

Fabrication and characterization of biomolecule-copolymer hybrids as energy conversion systems. - 126 p.

Source: Dissertation Abstracts International, Volume: 66-05, Section: B, page: 2693.

Thesis (Ph.D.)--University of California, Los Angeles, 2005.

The development of novel energy sources has continually become more important for their evolving applications in a wide variety of areas, from driving micro/nano devices, to enhancing the battlefield capabilities of military personnel and equipment. While current solid-state technology such as lithium ion batteries possesses adequate energy outputs for current technologies, a key area of improvement needed is enhancement in power density (W/kg). Energy transduction proteins are considered to be perhaps the most energy-conversion efficient systems. Their integration with robust, biocompatible materials enables the fabrication of devices with high power densities (>250W/kg). These composite systems can be used to enhance solid-state battery lifetimes, demonstrating the immeasurable impact that biologically active nanodevices can have on society.

ISBN: 0542134667Subjects--Topical Terms:

1017684
Engineering, Biomedical.

Fabrication and characterization of biomolecule-copolymer hybrids as energy conversion systems.
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100 1 $a Ho, Dean. $3 1066590
245 1 0 $a Fabrication and characterization of biomolecule-copolymer hybrids as energy conversion systems.
300 $a 126 p.
500 $a Source: Dissertation Abstracts International, Volume: 66-05, Section: B, page: 2693.
500 $a Chair: Carlo D. Montemagno.
502 $a Thesis (Ph.D.)--University of California, Los Angeles, 2005.
520 $a The development of novel energy sources has continually become more important for their evolving applications in a wide variety of areas, from driving micro/nano devices, to enhancing the battlefield capabilities of military personnel and equipment. While current solid-state technology such as lithium ion batteries possesses adequate energy outputs for current technologies, a key area of improvement needed is enhancement in power density (W/kg). Energy transduction proteins are considered to be perhaps the most energy-conversion efficient systems. Their integration with robust, biocompatible materials enables the fabrication of devices with high power densities (>250W/kg). These composite systems can be used to enhance solid-state battery lifetimes, demonstrating the immeasurable impact that biologically active nanodevices can have on society.
520 $a This study was conducted by inserting two types of membrane proteins, Bacteriorhodopsin (BR), and Cytochrome C Oxidase (COX), into block copolymer-based biomembranes. Bacteriorhodopsin serves as a light-activated proton pump that develops a chemical gradient utilized to drive COX activity in reverse to release electrons. The composite system was used to form biologically-active polymer vesicles that served as light-driven power sources. Experimental methodology to measure current/voltage outputs included the use of cyclic voltammetry, direct current measurement, as well as TEM imaging to confirm vesicle formation.
520 $a Key findings from this study included the demonstration of light-dependent current increases in composite vesicles, and pH gradient-dependent current production from COX. As such, this work produced the first biologically-active power source based on protein coupling that could produce current with no applied voltage. Direct current measurements demonstrated switching of light-driven current increases in excess of 10muA between ON/OFF states depending on DARK/LIGHT conditions in the absence of an applied voltage . Furthermore, by applying a pH gradient in excess of 4 pH units to COX-infused vesicles, current increases could be measured indicating that the current originated from the COX protein. These key findings have demonstrated the feasibility of using proteins as core technology for devices based on inherent molecular function.
590 $a School code: 0031.
650 4 $a Engineering, Biomedical. $3 1017684
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710 2 0 $a University of California, Los Angeles. $3 626622
773 0 $t Dissertation Abstracts International $g 66-05B.
790 1 0 $a Montemagno, Carlo D., $e advisor
790 $a 0031
791 $a Ph.D.
792 $a 2005
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3175211