Tech Briefs Magazine - May 2021 - 27
Sensors
Biometric Security System Based on the Human Heartbeat
The wearable prototype can stream, in real time, an identifying signature based on the
electrical activity of a person's heart.
Sandia National Laboratories, Albuquerque, New Mexico
A
biometric security system was developed that is based on the
human heartbeat. The wearable prototype can stream in real time an identi-
fying signature based on the electrical
activity of a person's heart. The wearable device could be made in the form
of a wristband or chest strap to serve as
SUBJECT
SUBJECT
SUBJECT
1
2
3
The biometric technology uses unique electrocardiogram signals sent from a wearable device, possibly a
wristband or chest strap, to identify a person for security purposes. (Illustration by Michael Vittitow)
an alternative to such things as fingerprints and eye scans when those access
control methods might be limited such
as in a laboratory where gloves or eye
protection may be necessary. The system uses HeartKey software developed
by UK-based B-Secur that enables
heart rate and other wellness indicators to be streamed in real time.
The system can identify and authenticate an individual from their unique
electrocardiogram signature. It recognizes the wearer's individual electrocardiogram signature and transmits a
signal, allowing the user access to a
specific location. The researchers' initial tests would be to see how the wearable communicates with access control
architecture and additionally, if it could
effectively track a person's movement
within a facility.
Such function could be useful for hospitals, airports, and other industries requiring accurate access control for domestic
and international threat reduction.
For more information, contact Michael J.
Baker at mbaker1@sandia.gov; 505-284-1085.
Paper-Based Sensor Detects COVID-19 in Minutes
The electrochemical sensor can detect the presence of the virus in less than five minutes.
University of Illinois, Urbana
A
s the COVID-19 pandemic continues to spread across the world, testing remains a key strategy for tracking
and containing the virus. Researchers
have developed a rapid, ultrasensitive
test using a paper-based electrochemical
sensor that can detect the presence of
the virus in less than five minutes.
There are two broad categories of
COVID-19 tests on the market. The first
uses reverse transcriptase real-time polymerase chain reaction (RT-PCR) and
nucleic acid hybridization strategies to
identify viral RNA. Some drawbacks
include the amount of time it takes to
complete the test, the need for special-
ized personnel, and the availability of
equipment and reagents. The second category focuses on the detection of antibodies; however, there could be a delay
of a few days to a few weeks after a person
has been exposed to the virus for them to
produce detectable antibodies.
In recent years, researchers have had
some success with creating point-of-care
biosensors using 2D nanomaterials such
as graphene to detect diseases. The main
advantages of these biosensors are their
sensitivity, low cost of production, and
rapid detection turnaround. Graphene
exhibits unique mechanical and electrochemical properties that make it ideal
Tech Briefs, May 2021
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Cov
ToC
for the development of sensitive electrochemical sensors. The team created a
graphene-based electrochemical biosensor with an electrical readout setup to
selectively detect the presence of SARSCoV-2 genetic material.
There are two components to the
biosensor: a platform to measure an
electrical readout and probes to detect
the presence of viral RNA. To create
the platform, researchers first coated
filter paper with a layer of graphene
nanoplatelets to create a conductive
film. Then, they placed a gold electrode with a predefined design on top
of the graphene as a contact pad for
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Tech Briefs Magazine - May 2021
Table of Contents for the Digital Edition of Tech Briefs Magazine - May 2021
Tech Briefs Magazine - May 2021 - Intro
Tech Briefs Magazine - May 2021 - Sponsor
Tech Briefs Magazine - May 2021 - Cov1
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