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Scientists Discover Way to Send Information into Black Holes Without Using Energy

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This New Electronic Skin Can Literally See Your Touch in Real Time

Researchers at the National University of Singapore (NUS) have developed a new type of electronic skin that can sense pressure and directly turn it into visible light. Called eLuminator, the soft and ultrathin device could make tactile information much easier to see and understand, with potential applications ranging from medical care and surgical training to robotics, prosthetics and wearable technology.

The research, published in Nature Communications, introduces a different approach to electronic skin. Instead of depending on hundreds or thousands of individual sensing pixels connected to complicated electronics, eLuminator uses a continuous, pixel-free structure that can visualize pressure directly where it is applied.

A New Approach to Electronic Skin

Electronic skin, or e-skin, is being developed to give machines and wearable devices a sense of touch similar to human skin. These systems can detect pressure, force and contact, making them useful for robots, prosthetic limbs, medical devices and health-monitoring technologies.

However, conventional e-skin systems often rely on arrays of separate sensors. Each sensing element must collect information, and that information usually needs to be transferred to external electronics for processing and display.

This architecture can create several problems. Complex wiring can make devices difficult to manufacture and integrate, while the number of individual sensing elements can limit spatial resolution. Most conventional systems also provide information through a separate electronic display rather than directly showing what is happening at the point of contact.

The NUS team, led by Professor Lim Chwee Teck from the Department of Biomedical Engineering and the Institute for Health Innovation & Technology (iHealthtech), wanted to approach the problem differently.

Their solution is the eLuminator, a soft, ultrathin electronic skin that can transform mechanical pressure into visible light.

Pressure Becomes Light

The key innovation behind eLuminator is a phenomenon known as mechano-electroluminescence.

In simple terms, mechanical force applied to the device changes the way it emits light. Instead of simply producing an electronic signal that must later be interpreted by a computer, the material itself produces a visible pattern corresponding to the pressure being applied.

This creates an immediate visual map of both where the force is applied and how strong it is.

Imagine pressing your fingertip against the electronic skin. Rather than receiving an abstract number on a screen, the contact area itself can produce a light pattern. Changes in pressure can therefore be observed almost instantly.

This could make tactile information much more intuitive for humans.

The technology also achieves a spatial resolution of approximately 30 micrometres, equivalent to about 847 dpi. This is considerably finer than the less-than-100-dpi resolution typically associated with conventional electronic skin systems described by the researchers.

It Can See Your Fingerprint

One of the most striking demonstrations of the technology is its ability to capture extremely fine surface features.

When a finger touches the eLuminator, the device can visualize the tiny ridges and valleys of a fingerprint.

This demonstrates that the system is capable of detecting highly detailed pressure variations rather than simply identifying whether something has touched the surface.

Such high-resolution tactile imaging could eventually become useful in applications involving biometric sensing, precision manipulation and human-machine interaction.

More broadly, the demonstration shows how electronic skin could move beyond simply measuring force and begin providing an immediate visual representation of touch.

Useful for Surgery and Health Care

One of the most important potential applications of eLuminator is health care.

During surgery, controlling the amount of force applied to delicate tissue can be extremely important. Too little force may make a procedure difficult, while excessive force can potentially damage tissue.

A pressure-sensitive layer integrated into surgical instruments could provide doctors or trainees with immediate visual feedback about how much force they are applying.

This could also be useful in surgical training, where students could learn how to control instruments while receiving direct feedback about their movements and applied forces.

The technology could have applications beyond surgical tools as well.

The researchers demonstrated pressure mapping on the foot, which could potentially help identify areas experiencing unusually high pressure. This is particularly relevant to people with diabetes, who can be vulnerable to foot ulcers.

A high-resolution pressure map could help identify pressure concentrations that might otherwise be difficult to detect, potentially supporting earlier monitoring and intervention.

Fast Enough to Capture Real-Time Touch

Speed is another important feature of the system.

According to the researchers, eLuminator provides optical feedback in approximately 15 milliseconds, while its digital readout takes around 110 milliseconds.

This allows the system to respond quickly to both stationary and moving interactions.

Fast response could be particularly valuable for robotics and prosthetics, where physical contact can change rapidly.

For example, a robotic hand equipped with advanced tactile sensing could potentially detect when it touches an object and determine how force is distributed across its surface.

Similarly, future prosthetic technologies could use comparable sensing systems to provide users with more information about how their artificial limbs interact with objects.

Thin, Flexible and Stretchable

Despite its sophisticated sensing capabilities, the eLuminator is remarkably thin.

The device is approximately 70 micrometres thick, making it thinner than a typical human hair.

It is also made from flexible, nontoxic materials designed to have mechanical characteristics similar to human skin.

The device can withstand more than 100% strain, allowing it to stretch substantially and conform to curved surfaces.

That flexibility could make it suitable for applications where rigid electronic sensors are difficult to use. It could potentially be attached to the human body, curved medical instruments or robotic surfaces without significantly interfering with their movement.

The researchers also tested the system under repeated mechanical stress and demonstrated stable performance across more than 1,000 to 4,000 cycles, depending on the testing conditions.

The device can detect pressure ranging from very gentle touches to approximately 180 kPa, providing a broad operating range.

One Device, Two Ways to Sense

Another important feature of eLuminator is that it combines visual and digital sensing in the same platform.

The visible light response allows humans to immediately observe pressure distribution, while the digital output can provide quantitative information for electronic systems.

This combination could simplify the design of future tactile interfaces.

Instead of requiring a separate sensor array, processing electronics and display system, some of these functions can be integrated into a single soft platform.

That could potentially reduce complexity while making tactile information easier for both humans and machines to interpret.

What Comes Next?

The NUS researchers are now working on improving the technology further, including increasing sensitivity and reducing its power requirements.

The team is also focusing on translating the technology into practical health-care applications.

For electronic skin to become widely useful, laboratory demonstrations will need to be followed by further testing, system integration and real-world validation. Medical applications, in particular, will require careful evaluation before the technology can be used in clinical settings.

Nevertheless, eLuminator represents an interesting shift in how artificial touch can be designed.

Rather than sensing pressure and hiding the information inside electronics, the device makes pressure visible almost instantly.

With its combination of high resolution, flexibility, rapid response and direct optical feedback, the technology could provide a new foundation for future wearable sensors, intelligent robots, prosthetic systems and biomedical devices.

The research, “Strain-localized luminescent e-skin for high-resolution pressure mapping and visual force feedback,” was published in Nature Communications by Wu, Chen, Fan and colleagues in 2026.

Reference' Wu, Z., Chen, S., Fan, S. et al. Strain-localized luminescent e-skin for high-resolution pressure mapping and visual force feedback. Nat Commun 17, 6886 (2026). https://doi.org/10.1038/s41467-026-73073-5

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