Nanofibrous Three Dimensional Microstructures for Energy Storage and Bioengineering Applications

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Material Information

Title:
Nanofibrous Three Dimensional Microstructures for Energy Storage and Bioengineering Applications
Physical Description:
1 online resource (172 p.)
Language:
english
Creator:
Jao, Pit Fee
Publisher:
University of Florida
Place of Publication:
Gainesville, Fla.
Publication Date:

Thesis/Dissertation Information

Degree:
Doctorate ( Ph.D.)
Degree Grantor:
University of Florida
Degree Disciplines:
Electrical and Computer Engineering
Committee Chair:
YOON,YONG KYU
Committee Co-Chair:
ARNOLD,DAVID P
Committee Members:
NISHIDA,TOSHIKAZU
WHEELER,BRUCE
KIM,GLORIA JUNG A

Subjects

Subjects / Keywords:
electrospinning
Electrical and Computer Engineering -- Dissertations, Academic -- UF
Genre:
Electrical and Computer Engineering thesis, Ph.D.
bibliography   ( marcgt )
theses   ( marcgt )
government publication (state, provincial, terriorial, dependent)   ( marcgt )
born-digital   ( sobekcm )
Electronic Thesis or Dissertation

Notes

Abstract:
Electrospun nanofibers have rapidly accelerated progress inthe fields of Tissue engineering, Energy storage, Sensor and Actuators, Air andFluid filtration and Textiles. While electrospun nanofibers are advantageous intheir nanoscale dimension which give it their large surface area andinterconnectivity, this dimensional advantage lends nanofiber membranes to befragile and dependent on macroscale interconnects. The fabrication of3-dimensinal (3D) nanofibrous microstructures would not only increase thefunctional capacity of the nanofibers but also allow for direct application ofnanofibers. 3D nanofibrous microstructures are challenging tofabricate, we have developed multiple fabrication processes that can be usedindependently or in tandem with other process to achieve the 3D structures.Throughput increase in nanofiber production is achieved either with chargerepulsion in multiple jetting sources in the tube nozzle electrospinning (TNE)technique or with charge attraction in composite PES-PNES technique. Alignmentof electrospun nanofibers can be attained using static alignment with chargedelectrode pairs and electrical switching or with dynamic alignment utilizingthe rotational momentum of the nanofiber coupled with the charge repulsion ofadjacent nanofibers. Patterning of nanofibers can be realized using eithernon-lithographic shearing of nanofibers and pattern transfer with the Stamp-thru-mold(STM) technique or lithographic patterning with electrospun photosensitive SU-8nanofibers with oil immersion (NIL) technique.  Applications with the developed techniques were used in the fabricationof nanofibers supercapacitors, thick biodegradable aligned nanofiber scaffold, andnanofibrous microelectrode arrays. The all nanofiber supercapacitors consistsof carbon derived from photopatternable SU-8 nanofibers as electrodes andnanofiber SU-8 membrane as separator. Preliminary test results demonstratedimproved capacitive density versus parallel plate capacitor but lower thanexpected results. Thick aligned nanofiber stacks were fabricated with staticand dynamic alignment coupled with composite positive and pseudo negativeelectrospinning (PES-PNES) techniques. The aligned nanofibers demonstrateincreased alignment with 2min switching periods when compared to 5min and onlyPES techniques. Carbon nanofiber microelectrodes were fabricated using NIL andcarbonization processes. Fabricated 3D nanofiber MEAs demonstrated goodbiocompatibility with E18 rat cortical neurons. Fabrication and testing ofcarbon microelectrodes will be demonstrated.
General Note:
In the series University of Florida Digital Collections.
General Note:
Includes vita.
Bibliography:
Includes bibliographical references.
Source of Description:
Description based on online resource; title from PDF title page.
Source of Description:
This bibliographic record is available under the Creative Commons CC0 public domain dedication. The University of Florida Libraries, as creator of this bibliographic record, has waived all rights to it worldwide under copyright law, including all related and neighboring rights, to the extent allowed by law.
Statement of Responsibility:
by Pit Fee Jao.
Thesis:
Thesis (Ph.D.)--University of Florida, 2013.
Local:
Adviser: YOON,YONG KYU.
Local:
Co-adviser: ARNOLD,DAVID P.
Electronic Access:
RESTRICTED TO UF STUDENTS, STAFF, FACULTY, AND ON-CAMPUS USE UNTIL 2014-12-31

Record Information

Source Institution:
UFRGP
Rights Management:
Applicable rights reserved.
Classification:
lcc - LD1780 2013
System ID:
UFE0046237:00001