Nanostructured Titania Katrina C. Celles Major: Biopsychology - - PowerPoint PPT Presentation

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Feb 23, 2023 18 likes •209 views

Nanostructured Titania Katrina C. Celles Major: Biopsychology Mentor: Dr. Andrew R. Morrill Undergraduate Mentor: Duc T. Duong Faculty Advisor: Prof. Martin Moskovits Chemistry Department What is Nanostructured Titania? Anatase TiO 2

SLIDE 1

Nanostructured Titania

Katrina C. Celles Major: Biopsychology Mentor: Dr. Andrew R. Morrill Undergraduate Mentor: Duc T. Duong Faculty Advisor: Prof. Martin Moskovits Chemistry Department

SLIDE 2

What is Nanostructured Titania?

Anatase TiO2 Metal Oxide with a diverse structure containing

high surface area

Modified with silane and nanoparticles for variety

f applications

SLIDE 3

Applications

Low Pressure Gas Sensing Biomolecular detection Vapor detection using Surface Enhanced Raman

Spectroscopy (SERS)

Mass spectrometry

SLIDE 4

Goals of the Summer

Synthesize Nanostructured Titania (NST) substrate Functionalize substrate with various organo silane

molecules and colloidal nanoparticles

Characterize modified substrate via Scanning Electron

Microscopy (SEM), Raman Spectroscopy, and Electrical Measurements

SLIDE 5

Synthesizing NST substrate

NST substrate consist of:

Oxidized in 10% Hydrogen Peroxide at 80oC

Titanium (Ti) NST Titania (TiO2) NST Silicon (Si) Silica (SiO2) Silica (SiO2) Silicon (Si)

SLIDE 6

Functionalize with Organo Silane and Colloidal Nanoparticles

3-Aminopropyl triethoxy

SLIDE 7

Characterize modified NST substrate

Scanning Electron Microscopy (SEM)

SLIDE 8

Control Experiment

NST not treated with silane, but treated with Silver (Ag) nanoparticles NST treated with silane and Silver (Ag) nanoparticles

SLIDE 9

SEM Images of NST with AuNP

NST not treated with silane, but treated with Gold (Au) nanoparticles NST treated with silane and Gold (Au) nanoparticles

SLIDE 10

Applications for modified NST substrate

Surface-Enhanced Raman Spectroscopy

SLIDE 11

Applications for modified NST substrate

Raman effect

silane

SLIDE 12

Applications for modified NST substrate

Raman effect

NP NP = nanoparticle

SLIDE 13

Applications for modified NST substrate

Raman effect

Linker/ Molecule of interest

SLIDE 14

Applications for modified NST substrate

Raman effect

NP NP = nanoparticle

SLIDE 15

Applications for modified NST substrate

Raman effect Formation of Raman active substrate Applications in solution and airborne analyte

detection

SLIDE 16

Applications for modified NST substrate

Electrical Measurements

SLIDE 17

Conclusion

Successfully synthesized NST substrate Deposited silane and nanoparticles onto the NST

substrate

Characterized samples using SEM

SLIDE 18

Future work

Obtain Raman spectrum for various linkers and

metal nanoparticles

Fabricate contact pads for NST substrates Perform electrical measurements

SLIDE 19

Acknowledgements

Dr. Andrew R. Morrill

Duc T. Duong Jodi Hong Moskovits’ Lab INSET Jens

Dr. Nick