Sabina Maza Corpus Christi ISD Dr. David Staack Assistant Professor Department of Mechanical Engineering THE INCORPORATION OF COLOR INTO PLASMA ENHANCED CHEMICAL VAPOR DEPOSITION FILMS
Feb 24, 2016
Sabina MazaCorpus Christi ISDDr. David Staack
Assistant Professor Department of Mechanical Engineering
THE INCORPORATION OF COLOR INTO PLASMA ENHANCED
CHEMICAL VAPOR DEPOSITION FILMS
Tsung-Chan “Cliff” TsaiDr. David Staack
4th state of matter: ionized gas
Most abundant in the cosmos Made of electrons and ions Electrically charged particles that respond to electric
and magnetic fields
What is plasma?
High temp electrons (20000 °F)Cold neutral gas –safe to touch
Examples:
LOW-TEMP PLASMA
Natural Aurorae borealis
Artificial Fluorescent lamp
Plasma in action
Plasma Enhanced Chemical Vapor Deposition (PECVD)
MMA
Floating substrate
HV
Power Supply
Helium
+- - -
-- -
- - -- -- -
- ++
+ + ++ +
+++- - -
--
Electrode
Dielectric tube Plasma jet
* **
* *
**
**
Film
Characteristics• Non-thermal plasma• Adhesive to varies surfaces• Sterilizer
MMA Polymerization
Applications Suitable for live tissues
Polymeric bandage on woundsSterilizes
Research Objective
To add a dye under PECVD conditions in order to produce a
colored film.
Method
CI
+ CI
Setup
ExperimentsSolubility
of dye in MMA
In solutionSublimed
Stability of dye after plasma
ejection
Optimal conditions of power supply
Properties on PMMA
Select new dyes
1
4
3
26
5
Data Generated Conditions to incorporate color indicator onto the
filmColor indicator solvent and concentrationSublimation temperature and gas flowPower supply
○ Voltage○ Frequency of electricity○ Line spectra○ Power
Color changes on film (spectral analysis)
Sensitive to changes in pH or temperature
Could signal chemical and/or metabolic changesmicrobial activity
WHY A COLOR FILM?
Summary Use of low temperature plasma to
deposit a film Film is functional band-aid: compatible
with life tissues, sterilizers and protects from re-infection
Film could indicate chemical/metabolic changes or microbial activity
Relatedness to Class ConceptsMatter
Physical and Chemical ChangesAtom and Atomic Theory
IonsBonding
Chemical ReactionsSolutions
pH
Acknowledgements Enrichment Experience in Engineering
(E3) Dr. David Staack Tsung-Chan “Cliff” Tsai Texas A&M University Mechanical Engineering Department National Science Foundation (NSF)
Thank you!