NFC (near-field communication) is a form of radio frequency identification (RFID), and that is a contactless information-sharing technology that operates in the 13.56 MHz frequency range. Users can send identification data wirelessly to the recipient for tracking and safety reasons using this new tech. Because NFC technology can only be used within a certain range, it is pretty safe and used in various industries, such as manufacturing, medicine, and financial services.
Furthermore, modern NFC technology has been coupled with the internet of things (IoT) to handle products and pinpoint various objects (clothing, textiles, fruits, and so on) using tags.
The public’s interest in NFC-based biomedical applications has risen dramatically. Several studies have performed to extend the range over which NFC technology could exchange information and transfer and receive power. The spatial constraints of conventional NFC can be greatly eliminated by increasing the usable distance. As a result, NFC technology‘s applicability in the biomedical field is becoming a hot topic.
What are the possible biomedical application areas?
Sensors for temperature and pressure
Temperature and pressure are the most commonly accessed used types of data in biomedical applications. In a study, an epidermal sensor was suggested. The device was finalized by incorporating an ultra-thin form since it is driven by a wireless power supply technique and does not require a battery. These sensors, like temporary tattoos, can be overlaid on any part of the human skin.
They can also conform to the microscopic shape of human skin perfectly. Commercially available ultra-low power NFC chips that can transfer power and data wirelessly have been used to demonstrate wireless power supply via inductive antennas.
Sensors of electrophysiology
Optical and electrode-based sensors are used in conventional heart rate monitors to gauge biosignals over a wire. But, these are not suitable for use in outdoor or indoor environments. Adaptable electrocardiogram (ECG) sensors, on the other hand, can be attached to the epidermis. An extremely flexible epidermal ECG and heart rate wearable sensor has also been suggested, emphasizing low cost, lightweight (1.2 g) energy harvesting. Installation amplifiers and filters are used by the sensor’s onboard hardware to monitor and control potentials and signals and decrease common-mode signals.
The microcontroller was created to coordinate the switching between battery and NFC power conversion and regulate the surge current when the system is turned on, resulting in the best possible power consumption.
Potential applications for millimeter-scale wireless and battery-free NFC platforms with a variety of systems are available. Although ultraviolet (UV) radiation from the sun can be harmful to human health, regulated amounts of electromagnetic waves can be beneficial. Miniaturization, low cost, and battery-free devices for exact dose measurements at multiple wavelengths are feasible with optical metrology, design, and wireless operating mode platforms. The systems can monitor UVA, UVB, visible, and IR radiation using NFC technology, a suitable antenna layout, and a versatile electronics and electronic circuit design method.
What to learn?
NFC technology has primarily been used for access control and payment in the past. Wireless wearables that can non-invasively evaluate bio-signals while trying to make “skin-like” contact have been the focus of the latest research. Sensors that incorporate NFC and sensing technology are used to measure various biosignals with system miniaturization and a wireless power source. In biosignals, using NFC technology to accommodate for the deficiencies of inconvenient wired devices is a great choice.
Users will benefit from systems that monitor body temperature, pressure, electrophysiology, blood flow, and sweating in real-time. It can surely reduce response time to biological abnormalities by healthcare professionals.