Type of Document	Dissertation
Author	Hasan, Saad Abir
URN	etd-04152010-120348
Title	NANOPARTICLES AS THE SOLE BUILDING BLOCKS OF MACROSCOPIC SOLIDS
Degree	PhD
Department	Interdisciplinary Materials Science
Advisory Committee	Advisor Name Title Professor James Dickerson Committee Chair Professor Bridget Rogers Committee Member Professor Sandra Rosenthal Committee Member Professor Sokrates Pantelides Committee Member
Keywords	graphene oxide colloidal electrophoretic deposition nanoparticles free-standing assembly
Date of Defense	2010-04-01
Availability	unrestricted
Abstract Colloidal nanoparticles in an assortment of shapes (e.g., spherical, rod-like, tube-like, sheet-like) have been the focus of far-reaching research pursuits due to their attractive material-dependent and size-dependent electronic, optical, and magnetic properties. One approach to deploy these materials in devices is to fabricate them into multilayered thin films. Fabricating thin films over macroscopic dimensions requires controlling the assembly behavior of a very large number of nanoparticles. In addition to understanding the assembly behavior, we were interested in whether this many-particle assembly could exist as a free-standing object. To determine the stability of the nanoparticle assemblies, we used the principles of DLVO theory to calculate the potential energy of the interaction between two particles. Nanoparticle films were assembled using electrophoretic deposition. To fabricate free-standing films, we proposed a technique in which particles would be deposited atop a thin sacrificial layer. This technique of sacrificial layer electrophoretic deposition (SLED) was demonstrated by producing macroscopic, free-standing films of hexane-dispersed CdSe and iron oxide nanoparticles and of water-dispersed sheets of exfoliated graphene oxide (eGO). By tuning the pH of the aqueous eGO suspensions, we also demonstrated the fabrication of films with different microstructures, which exhibited both hydrophilic and hydrophobic surface wetting properties.
Files	Filename       Size       Approximate Download Time (Hours:Minutes:Seconds)     28.8 Modem   56K Modem   ISDN (64 Kb)   ISDN (128 Kb)   Higher-speed Access    00-a-title-etc.pdf 33.04 Kb 00:00:09 00:00:04 00:00:04 00:00:02 < 00:00:01   00-b-acknowledgment.pdf 43.58 Kb 00:00:12 00:00:06 00:00:05 00:00:02 < 00:00:01   00-c-contents-etc.pdf 122.73 Kb 00:00:34 00:00:17 00:00:15 00:00:07 < 00:00:01   01-Chapter1.pdf 139.68 Kb 00:00:38 00:00:19 00:00:17 00:00:08 < 00:00:01   02-Chapter2.pdf 660.19 Kb 00:03:03 00:01:34 00:01:22 00:00:41 00:00:03   03-Chapter3.pdf 162.11 Kb 00:00:45 00:00:23 00:00:20 00:00:10 < 00:00:01   04-Chapter4.pdf 1.05 Mb 00:04:52 00:02:30 00:02:11 00:01:05 00:00:05   05-Chapter5.pdf 1.90 Mb 00:08:47 00:04:31 00:03:57 00:01:58 00:00:10   06-Chapter6.pdf 2.87 Mb 00:13:15 00:06:49 00:05:58 00:02:59 00:00:15   07-Chapter7.pdf 21.18 Mb 01:38:03 00:50:25 00:44:07 00:22:03 00:01:52   08-Chapter8.pdf 4.02 Mb 00:18:35 00:09:33 00:08:21 00:04:10 00:00:21   09-Chapter9.pdf 51.93 Kb 00:00:14 00:00:07 00:00:06 00:00:03 < 00:00:01   10-references.pdf 89.54 Kb 00:00:24 00:00:12 00:00:11 00:00:05 < 00:00:01