Recent studies reveal some promising ways to harness ocean power for sustainable technologies. 

Flinders University scientists have published three new papers exploring innovative methods to capture ocean wave energy, boost biofuel production with marine microalgae, and improve catalytic efficiency in engines. 

In one study, nanotechnology experts developed a self-powered wave sensor designed to capture energy from low-amplitude ocean waves.

The ‘hybrid self-powered wave sensor’ (HSP-WS) can detect wave fluctuations as small as 0.5 cm. 

“The data obtained from HSP-WS can fill gaps in the wave spectrum, improving energy harvesting efficiency.” Professor Youhong Tang explains. 

The sensor could optimise the placement of energy harvesters by providing better data on wave patterns.

Another new study focused on marine microalgae for biofuel. 

Professor Tang and aquaculture expert Professor Jianguang Qin worked on improving the growth and lipid accumulation of Chlamydomonas reinhardtii, using a novel ‘photosensitiser’ to enhance photosynthesis. 

“Microalgae-derived polyunsaturated fatty acids (PUFA) offer a promising alternative to fossil fuels, with 10 to 50 times higher efficiency than terrestrial plants,” Professor Qin noted.

The advancement could pave the way for large-scale microalgae biofuel production, reducing carbon emissions.

A third study investigated a new nanotechnology approach to enhance electrocatalytic reactions, key for converting gases into green fuels. 

Associate Professor Melanie MacGregor’s team developed a plasma-deposited coating to improve gas availability at the catalyst surface while reducing water interference. 

This technique could advance technologies that turn nitrogen and carbon dioxide into sustainable fuels.

Together, the studies highlight the potential of ocean-based technologies and nanoscale innovations in shaping renewable energy's future. 

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