Sun exposure gets personal with wearable UV sensors

Managing vitamin absorption and avoiding sun damage could soon be as simple as slipping on a bracelet thanks to new personalised sensors.

RMIT researchers have developed an ultraviolet (UV) active ink that changes colour when exposed to different types of UV rays and can be printed and worn as a single use, disposable wrist band.

A personal struggle with Vitamin D deficiency led Professor Vipul Bansal to develop the color-changing sensors that come in six variations to reflect the range in human skin tone.

Bansal said the discovery could help to provide people with an accurate and simple measure of their personal exposure levels throughout the day.

“We can print our ink on any paper-like surface to produce cheap wearable sensors in the form of wrist-bands, head bands or stickers for example,” he said.

26 September 2018

Share

RMIT researchers from the Ian Potter NanoBioSensing Facility wearing prototypes of their UV sensor, from left to right, Dr Rajesh Ramanthan, PhD candidate Wenyue Zou and Professor Vipul Bansal.

While humans do need some sun exposure to maintain healthy levels of Vitamin D, excessive exposure can cause sunburn, skin cancer, blindness, skin wrinkling and premature signs of aging.

Knowing what a healthy amount is for you depends on understanding your personal classification, from Type I to VI, as each has very different solar exposure needs.

Diseases such as Lupus and many medications increase the photosensitivity of our skin and reduce our ability to absorb Vitamins through diet, making monitoring our sun exposure thresholds highly individual.

“We are excited that our UV sensor technology allows the production of personalised sensors that can be matched to the specific needs of a particular individual,” said Bansal.

“The low cost and child-friendly design of these UV sensors will facilitate their use as educational materials to increase awareness around sun safety.”

Currently the only guide for managing sun exposure is UV index however this blunt tool only indicates the intensity of UV rays. It does not act as a precise tool to monitor each individual’s daily exposure.

Fair skin (Type I) can only tolerate only one fifth of the UV exposure that dark skin (Type VI) can before damage occurs, while darker types require longer in the sun to absorb healthy amounts of Vitamin D.

The discovery also has application beyond the health sector as over time UV rays can have damaging effects on the lifetime of many industrial and consumer products. 

Monitoring this exposure could help improve the safety and reliability of a range of items, including vehicles and military equipment, with huge potential cost savings.

The paper titled, "Skin color-specific and spectrally-selective naked-eye dosimetry of UVA, B and C radiations" by Bansal’s team member, Vice-Chancellor's PhD scholar Wenyue Zou has been published in Nature Communications (DOI: 10.1038/s41467-018-06273-3).

Story: Grace Taylor

26 September 2018

Share

  • Science and technology

Related News

Researchers bring the bling to improve implants

In a world first, Australian researchers have harnessed the power of diamonds in a breakthrough that could radically improve the way human bodies accept biomedical implants.

Micro miracles – how nanotechnology is driving health outcomes

RMIT University is generating quality international commercial outcomes by combining cutting edge biomedical research with innovative business thinking.

RMIT receives funding to support the nurses of tomorrow

RMIT’s School of Vocational Engineering, Health and Sciences has been granted a Workforce Training Innovation Fund (WTIF) worth $3.5 million in a Victorian first.

Lending a helping hand

RMIT University and Hands on Health Australia (HoHA) have teamed up to deliver a student outreach health clinic to Indigenous football and netball club, the Fitzroy Stars.

Show more
Subscribe to RMIT NewsSubscribe
Flag Image One Flag Image Two

Acknowledgement of Country

RMIT University acknowledges the people of the Woi wurrung and Boon wurrung language groups of the eastern Kulin Nation on whose unceded lands we conduct the business of the University. RMIT University respectfully acknowledges their Ancestors and Elders, past and present. RMIT also acknowledges the Traditional Custodians and their Ancestors of the lands and waters across Australia where we conduct our business.

More information