Power Plant

Synthetic biology is the future of energy.


May 01, 2019


Catalina Lotero
Marcelo Padovani
Asuka Muramatsu
Chris Gao
Siyu Zhang
Qi Chai
Atsushi Futatsuki
Olivia Peralta
Yuki Minegishi
Matthew Waldman

Master Students
Keio University Graduate school of Media Design.


The Raiki project is a biological microgrid for underprivileged urban and areal areas that takes advantage of the natural functions of plants combined with energy harvesting technology. The biological plant design is based on the research of current tree functions, triboelectric technology, incorporating data on wind velocities, and leaf shape analysis.

The Raiki project has been presented at The Biodesign Challenge in New York, Dubai Design Week in Dubai and Design Indaba in Cape Town.

BACKGROUND – It is estimated that today, 1 in every eight people still have no access to electric energy, a problem that has a big impact rural areas in developing countries, that is why “Ensuring access to affordable, reliable, sustainable and modern energy” is the UN’s 7th sustainable development goal and one of the biggest global environmental and health challenges today.

Most common attempts for renewable and sustainable energy sources are facing unexpected environmental challenges considering the growing need for energy. They affect wildlife, plant population and people’s lives and perception of landscapes in a negative way.

OFF-THE-GRID – Off-grid solutions are a growing topic of research as a way of diminishing the dependency of energy from big power plants such as nuclear and hydroelectric, by providing energy generated locally, with less energy waste during transportation from source to consumer, and less material and infrastructure necessary to transport this energy through long distances, being excellent alternatives especially for places with difficult access to the energy where solar and wind power are usually used, with significant negative impact.

From fuel cells to nanoscale energy harvesting, microgrids and distributed networks can also be extremely supportive during disasters such as earthquakes and storms, events that can interrupt the energy supply and communication systems.

DESIGN – The design is based on the research of current tree functions and its material compositions, triboelectric technology, incorporating data on wind velocities and leaf shape analysis for the design of its leaves. Raiki main requirement is that its leaves have optimized movement in the wind: the more contact times the bigger is the energy output.

The effectiveness of a triboelectric energy harvester depends on the tree height, branch and leaf distribution, leaf shape, composition, area, and area of contact with a second surface, necessary for contact electrification of the leaf. These aspects formed the basis for the shape design for a different aspect of our tree: Raiki is a structure designed to grow under ideal weather and care conditions at a 5-year pace.

TECHNOLOGY – In order to transform a tree into a real efficient energy source and harvester we used and researched triboelectric and plant synthetic biology techniques. Our tree will grow naturally and as it grows it will take the ideal shape it was designed to have.

Triboelectric nanogenerators (TENG) are based on triboelectrification and electrostatic conjunction and through this materials can become electrically charged when, by touching, pressing or rubbing, they come in contact with another material according to their charge affinities and the charges can be conducted out of the surface through an electrode to be used as electrical energy.

We are designing the future of alternative energy sources, by combining synthetic biology and design.


ENVIRONMENTAL IMPACT – Raiki’s strengths is that it’s a sustainable energy source that’s doesn’t affect wildlife, plant populations, or people’s lives in negative ways like some other energy sources like solar energy.

SUSTAINABILITY – Raiki is a concept that would contribute to the improvement of current renewable energy sources, reducing the carbon print and greenhouse emissions for energy production, avoiding at maximum the use of non-biodegradable materials and at the same time being an off-grid solution.

FAISABILITY – Recent research has proven that leaves can act in a TENG as both the electrification layer and electrode, that the charges can be harvested at the plant’s stem and that not only the contact between leaves and other materials in the triboelectric series but also the contact between different leaves can lead to energy output.

RISKS & ETHICAL ISSUES – Raiki is speculation that raises questions of what can happen as synthetic biology advances and which aspects the level of modification of nature it allows do we want and which ones we don’t want for our future.


First trial of The Triboelectric Effect

We have been playing with the idea of not working with piezoelectric technology but instead use the triboelectric effect. That way every time the leaves touch any other material they charge that material with energy. To test the triboelectric effect, we built a leaf...

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Video Timeline Design

The team in charge of the video got together today to plan the video storyboard. We wrote down and sketched everything that we though were relevant to explain during the video and then cut them out and organized them. We found out there are a lot of subjects we would...

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Who owns the wind?

After talking to the organization in charge of defending the La Guajira community’s interests during the growth of their involvement in Colombia’s energy generation business we read their book and came back with more questions. The organization was kind enough to send...

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Video Interviews

We designed a number of questions that will help us and the public understand why we are doing this project. Why we think it’s important and what we think events like the biodesign challenge are important for the improvement of our lives. We conducted the interviews...

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Aesthetic Inspiration

Aesthetic Inspiration

Today we are getting inspired by trees in sci-fi and nature to decide the look of our 3D render and final sketches. Trees that have appeared in movies like Avatar, trees that were designed for different video games like Finn and Jake’s house from Adventure Time  and...

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Wind Farms in La Guajira

Today we heard from Camilo Gonzales, president of Indepaz (Institute of development and peace) a Colombian organization that accompanies initiatives of social, ethnic and youth organizations in the relationship with companies and macro projects; citizen security;...

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Hirota Taguchi – Fluid Mechanics Scientist
Elif Alpoge



Xavier Ferré
Cendikia Luthfita
Andrew Hessel
Takahiro Fujimoto
Camilo Gonzalez Posso





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