Part 1 showed two production techniques for electronic- or E-tongues. Researchers are busy investigating ways to use advanced artificial intelligence (AI) in conjunction with new sensing techniques to provide even more capabilities to E-tongues. Sensing for food problems To detect food fraud, spoilage, and contamination within minutes, researchers at Penn State University developed their version […]
Biosensor
How does voice recognition biometrics work?
A voiceprint, also called a voice template, is a unique pattern of a person’s voice sounds. Based on hundreds of subtle voice characteristics, voiceprints can be used to identify a person, just like fingerprints or facial recognition. The uniqueness of voiceprints derives from the fact that there are over 70 body parts, each of which […]
How do eye & iris scan biometrics work?
Iris scan biometrics is one of two techniques that use unique eyeball characteristics for security and identification purposes. The other technique is retinal scanning. Iris scans are more commonly used because they are quicker and less invasive, but retinal scanning can be more accurate. The two techniques also have different applications. A retinal scan requires […]
What are the applications for hollow core fiber optical sensors?
Hollow core fiber (HCF) optical sensors are used in applications including Li-ion battery research and development (R&D), robotic arms, civil engineering infrastructural health monitoring, and biosensing. Some of the attributes of HCF optical sensors are small footprints, non-conductance, chemical stability, and high dynamic ranges. In the case of activities like Li-ion R&D, HCFs can be […]
How does skin color impact biosensors?
To determine blood oxygen (arterial blood oxygen saturation (SpO2)) and pulse rate, many biosensors use the reflectance of red and infrared (and sometimes green) light. Based on photoplethysmography (PPG), an optical technique that measures blood volume variations, dual-wavelength PPG pulse oximeters noninvasively measure/calculate the arterial oxygen saturation (SpO2). An oximeter transmits radiation at a known […]
What are next generation bio sensing techniques? Part 2
Part 1 of this blog explored research into localized surface plasmon resonance (LSPR) sensors. This part discusses a surface plasmon resonance/surface-enhanced Raman scattering (SPR/SERS) dual-mode plasmonic biosensor and two other sensing techniques. The SPR/SERS biosensor based on catalytic hairpin assembly (CHA)-induced Au nanoparticle (AuNP) network was proposed for highly sensitive and reliable detection of a […]
What are next generation bio sensing techniques? Part 1
With the ease that people can travel around the world, viruses spread through droplet transmission are one of the most dangerous causes of infectious diseases. The COVID-19 pandemic made this point quite clear. One of the obvious responses to prevent a reoccurrence of this type of situation is effective virus detection technology to prevent the […]
What’s new in glucose sensing?
Key driving forces for new or next generation products include (1) critical need, (2) broad, global usage and (3) sufficient volume requirements to justify R&D expenditures. Glucose sensing/monitoring meets these criteria and more. In the United States alone, the American Diabetes Association (ADA) says over 133 million Americans have diabetes or prediabetes [1]. According to […]
How can low-cost sensors help address climate change?
According to the recent IDTechEx report “Printed and Flexible Sensors 2022-2032: Technologies, Players, Markets,” low cost printed/flexible sensor technologies could play a significant role in adapting to climate change [1]. Adapting could take various forms, from changing the areas in which specific crops are grown to building flood defense systems and even relocating cities in more […]
How can sensors help cleanup waterways?
Twenty years after its first-generation design was introduced (2002), iRobot’s Roomba has spawned many competitors for indoor cleanup and made several advancements to its initial capabilities. Interactive Autonomous Dynamic Systems (IADYS) has applied the autonomous robot concept to address cleaner and safer water in rivers, canals, lakes, ponds, shipyards, and more. IADYS’ Jellyfishbot autonomously collects […]
