wearable electrochemical biosensors
TRANSCRIPT
RESULTS & GRAPHICS/CHARTS
Cleaned textile, two styles: We tested textiles that were prepared in two
different ways different insulator coverings) in order to see which way
produced usable results. The textile with the larger surface area produced a
more linear graph with a higher R-squared value than the textile with the
smaller surface area. (show graphs and data as needed).
Ag-Pt textile: We ran sensing tests on three platinum textiles with different
amounts of silver deposited on top of it. Prior research has shown that
silver has antimicrobial properties which is a desirable trait. The results
were linear in most cases and… (add more after looking at graphs/statistics
for silver sensing)
DISCUSSION
The data we have collected from our Amperometric i-t curves indicate
encouraging results for the future development of nanometal-based textile
biosensors. We applied two coats of nail polish on the textile to see which
one had an impact on the cleaning. We found out that the textile with half
nail polish applied on it had better result because the sensing curve(R-
square) was .963, while the textile with full nail polished applied only had
.764. The closer the sensing curve is to 1, the better your model is. In
summary, the textile with less nail polish on it had more surface area
exposed, which led to better cleaning of textile electrode. This cleaning
process typically led to better H2O2 sensitivity and a more linear correlation
between current response and H2O2 concentration.
The last testing we did was with the textiles that had silver deposited on it.
We did the silver deposition because silver is anti-microbial. We were trying
to see whether time was a factor in sensing with silver. We found out that it
was because the less silver applied, the better the sensing result where. For
the textile that had one minute silver deposited on to it, the sensing curve
was .964, for the 3 minute textile, It was .902, and for the 5 minute, it was
.873. Addition of silver nanoparticles to the textile increases its
antimicrobial properties but it also weaken the electros sensitivity. In future
work, the ration of silver to platinum nanoparticle will be optimized in order
to provide both a sensitivity sensor and a sensor that does not biofoul.
ABSTRACT
For our project, we were developing a fabricated
nano-platinum sensor that will be embedment in
clothing. We did this by depositing platinum onto a
textile and using two different methods of nail polish
to see which one had the better surface area. We
also deposited Silver on to three different textiles
and tested it because silver has antimicrobial
properties. We were able to conclude that the less
silver applied on textile the better sensing. The
addition of silver adds antimicrobial but it weakness
sensitivity
The material presented here is based upon work supported by the National Science Foundation under Award No. EEC-0813570. Any opinions, findings, and conclusions or
recommendations expressed in this material are those of the author(s) and do not necessarily reflect the views of the National Science Foundation.
Wearable Electrochemical BiosensorsFahmo Mohamed ,Ogue Addeh, Makenzie Petersen, Gabe Wright
Mentor: Jonathan Claussen Ph.D Graduate Mentors: Suprem Das, Shaowei Ding
METHODS
1) Deposit platinum nanowires on fabric. Add 54 ml of DI water to 6ml of formic acid and 300 milligrams moles of chlorplatinic acid hexa-hydrate. Measured the pH to make sure it was between 1.55 and 1.6.
2) Insert in white fabric in the yellow solution. Wait 24 hours for the solution to turn clear and the fabric to turn black.
3) Clean with nitric acid and DI water than take 50 cycles from -2.0 to -1.5v using sulfuric acid (concentrated HNO3) .
4) Apply two coats of acrylic insulator (i.e., nail polish) and tested it to see which one was better.
5) Deposit silver nanoparticles. Use .1M of KNO3with 1.0mm of AgNO3 as our solution.
6) Use three textiles, do a 1 minute, 3 minute, and 5 minute sensing on the amperometric i-t curve.
7) Start Hydrogen peroxide (H2O2) sensing on the textiles with silver deposition.
BACKGROUND
• Saliva
• Sweat
• Subcutaneous
Fluid
• Blood
RESULTS & GRAPHICS/CHARTS
ACKNOWLEDGEMENT
Thank you to Jonathan Claussen Ph.D, Shaowei Ding, Gabe Wright
Ogue Addeh, and Makenzie Petersen
Uncleaned sample
Half nail polished Full nail polished
No strong
prevalenc
e of “steps
1 minute .7V 3 minute .7V
5 minute .7V
No strong
prevalence of
“steps
H2O2 sensing Glucose sensing
Monitors heart rate and daily activity
Tracks activity exercise, food, weight and sleep
Monitor people's vital signs while they are up and about performing their normal daily activities
REFERENCES
Yixian Wang, ZunZhong Ye, Jianfeng Ping, Shunru Jing, Yibin Ying “
Development of an aptamer-based impedimetirc bioassay using microfluidic
system and magnetic separation for protein detection”
1500X 5000X 50000X
50 cycles
250
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500
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