<%BANNER%>

Record for a UF thesis. Title & abstract won't display until thesis is accessible after 2011-08-31.

Permanent Link: http://ufdc.ufl.edu/UFE0022602/00001

Material Information

Title: Record for a UF thesis. Title & abstract won't display until thesis is accessible after 2011-08-31.
Physical Description: Book
Language: english
Creator: Flores, Glen
Publisher: University of Florida
Place of Publication: Gainesville, Fla.
Publication Date: 2009

Subjects

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

Notes

Statement of Responsibility: by Glen Flores.
Thesis: Thesis (Ph.D.)--University of Florida, 2009.
Local: Adviser: Batich, Christopher D.
Electronic Access: INACCESSIBLE UNTIL 2011-08-31

Record Information

Source Institution: UFRGP
Rights Management: Applicable rights reserved.
Classification: lcc - LD1780 2009
System ID: UFE0022602:00001

Permanent Link: http://ufdc.ufl.edu/UFE0022602/00001

Material Information

Title: Record for a UF thesis. Title & abstract won't display until thesis is accessible after 2011-08-31.
Physical Description: Book
Language: english
Creator: Flores, Glen
Publisher: University of Florida
Place of Publication: Gainesville, Fla.
Publication Date: 2009

Subjects

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

Notes

Statement of Responsibility: by Glen Flores.
Thesis: Thesis (Ph.D.)--University of Florida, 2009.
Local: Adviser: Batich, Christopher D.
Electronic Access: INACCESSIBLE UNTIL 2011-08-31

Record Information

Source Institution: UFRGP
Rights Management: Applicable rights reserved.
Classification: lcc - LD1780 2009
System ID: UFE0022602:00001


This item has the following downloads:


Full Text

PAGE 14

14 Abstract of Dissertation Presented to the Graduate School of the University of Florida in Partial Fulfillment of the Requirements for the Degree of Doctor of Philosophy BIMODAL MOLECULAR WEIGHT POLYVINYL PYRROLIDONE-SYNTHESIZED SILVER NANOPARTICLES FOR USE AS LOW-CURING TEMPERATURE CONDUCTIVE MATERIALS By Glen Patrick Flores August 2009 Chair: Christopher D. Batich Major: Materials Science and Engineering In the past quarter century, many researchers have begun materials investigations into lowcuring temperature metallizations. These low-temperature metallizations may allow for the design of complex electronic circuits on low-melting temperature substrates. Metal nanoparticles are of great interest due to their ability to begi n sintering at temperatures as low as 150C. The small size and environmental stability of gold and silver nanoparticles allows them to be economically and rapidly printed from industrial and commercial printing equipment. Upon heat treatment above their sintering temperature, these printed nanoparticles form continuous metallic lines. Gold and silver conductive line widths as small as a few micrometers have been made using nanoparticles in inkjet and pad prin ting techniques. Such techniques may also help decrease the high manufacturing costs associated with other metallization techniques such as photolithography. Electronic devices that utilize low-glass transition temperature substrates (such as many polymers or organic substrates) require metallizations to form at curing temperatures even lower than the sintering temperature of gold and silver nanoparticles. These metallizations must also exhibit low electrical resistivity (smaller than 10-4 -cm). One application of such low-curing

PAGE 23

Research in Silver Nanoparticle Synthesis Using the PVP -Protection Mechanism

PAGE 24

PVP Protection Mechanism

PAGE 25

sp sp sp

PAGE 27

Silver Nanoparticle Reduction Systems The Polyol Process

PAGE 29

Formaldehyde Reduction

PAGE 34

Other Silver Nanoparticle Synthesis Reactions

PAGE 38

Other Nanoparticle Systems

PAGE 41

Current Silver Printing Applications

PAGE 42

Pad Printing

PAGE 45

Screen Printing

PAGE 46

Inkjet Printing V = 4/3r3 V r

PAGE 48

Review of Printing Methods Biocompatibility of Various Silver Compounds and Particles

PAGE 49

General Health Effects Silver Compounds Silver and silver alloys

PAGE 54

Studies of Specific Silver Exposure type dose manner of silver absorption or method of silver intake. metallic, high dose, ingested Silver acetate gum

PAGE 55

Food -grade silver foil

PAGE 56

Solid silver biomedical implants

PAGE 57

Application of Biocompatibility Analysis to E -pills

PAGE 59

Ink Preparation SNPs below 200 nm Relatively high solution molarity No non-biocompatible elements or compounds Re agents were to be low cost Reaction time was constrained to be less than 3 hours Final PVP content in SNP ink was to remain below 5% Ink from SNPs had to show good printability SNP in k should be re -suspendable in a variety of solvents SNPs should be stable and suspendable for extended periods

PAGE 60

Basic Ink Synthesis All reaction steps are t o be performed in a fume hood due to toxic volatile compounds.

PAGE 63

Analysis Techniques Transmission Electron Microscopy

PAGE 64

Scanning Electron Microscopy Thermal Gravimetry

PAGE 65

Particle Size Analysis Techniques Four -Point Probe

PAGE 66

Rs = 4.532(V/I) Rs V I 4.532 Current Voltage Analysis Atomic Force Microscopy

PAGE 68

Visual Observations

PAGE 72

Inquiry into Visual Observations Effects of PVP Amount

PAGE 78

Coil Confo rmation Importance

PAGE 83

l n l

PAGE 84

Solution Colors

PAGE 86

Other Observations

PAGE 87

Experimental Desi gn

PAGE 89

Microtrac Nanotrac Results

PAGE 91

DOE Repeatability

PAGE 95

Statistical Analysis of DOE i i j

PAGE 98

TEM Images

PAGE 109

Summary of DOE Results Bimodal PVP MW Reaction Systems and Effects on SNP Properties

PAGE 112

CPSC for SNPs

PAGE 116

TGA of SNPs

PAGE 119

TEM Im ages of SNPs

PAGE 123

Electrical Resistivity of SNPs

PAGE 128

SEM Images of Cured SNPs

PAGE 133

Summary of Bimodal PVP MW SNPs Explanation of Electrical Resistivity of SNPs Cured at Temperatures Below Their Sintering Temperature

PAGE 134

Current Voltage Analysis of SNP Thin Films

PAGE 135

-1.5E-08 -1.0E-08 -5.0E-09 0.0E+00 5.0E-09 1.0E-08 1.5E-08 -6-4-2 0246 Voltage (V) Current (I)

PAGE 136

-1.5 -1 -0.5 0 0.5 1 1.5 -3 -2 -1 0 1 2 Voltage (V) Current (A) Atomic Force Microscopy of SNPs

PAGE 137

stiffer surfaces are distinguished by a large phase shift with abrupt edges

PAGE 140

Summary of Electrical Resistivity of SNPs Cur ed at Temperatures Below Their Sintering Temperature

PAGE 141

Printing of SNPs

PAGE 142

Conclusions

PAGE 144

Future Work

PAGE 147

International Journal of Multiphase Flow Clinical Therapeutics Applied Physics Letters. Materials Chemistry and Physics. Materials Chemistry and Physics. Food Additives and Contaminants Macromolecular Rapid Communications Journal of Psychiatry Neuroscience. Annals of Occupational Hygiene. Clinical Therapeutics. Journal of Toxicology: Clinical Toxicology. Drugs Aging.

PAGE 148

Molecular Crystals and Liquid Crystals. Critical Reviews in Toxicology. Nanotechnology. Nanotechnology. Advanced Functional Materials. Chemistry of Materials. Surface Science Chest. Journal of the American Medical Association. Philosophical Magazine B Journal of Electronic Materials. Analytical Chemistry

PAGE 149

Langmuir. Colloids and Surfaces A: Physiochemical and Engineering Aspects. Journal of the European Ceramic Society. Coloration Technology. Journal of Materials Science Biosensors and Bioelectronics. Colloids and Surfaces A: Physiochemical and Engineering Aspects Journal of Colloids and Interface Sciences. Spectrochimica Acta, Part A: Molecular and Biomolecular Spectroscopy. Chemistry of Materials. Langmui r Langmuir

PAGE 150

Materials Chemistry and Physics Pediatrics. Journal of Physical Chemistry Biomedical Cir cuits and Systems Conference, 2007 Journal of Solid State Chemistry. Philosophical Magazine Letters