Architect Neri Oxman, creator of ‘material ecology,’ explains how silkworms, shrimp shells and insect exoskeletons could help shape the city of the future.
4 min
While the pandemic heightened speculation about what the city of the future will look like, architect Neri Oxman says she is sticking with a blueprint based on a core principle of her work: In years to come, buildings will be grown, not built.
At Massachusetts Institute of Technology’s Media Lab from 2010 to 2021, Ms. Oxman founded and directed the Mediated Matter group, a team researching in areas including computational design, digital fabrication, materials science and synthetic biology. There, she created a field she calls material ecology.
The result? A body of work that includes a pavilion spun by 6,500 silkworms (with the help of a robotic arm), a series of 3D-printed sculptures filled with liquid channels of the pigment melanin (which she envisions could be used in the façades of buildings to protect against ultraviolet rays), and a collection of artifacts constructed using materials derived from shrimp shells and insect exoskeletons.
Since leaving academia, Ms. Oxman, 46 years old, has focused on Oxman, the New York-based design and technology company that she founded in 2020 with the aim of applying her design philosophy to real-world projects. A retrospective of her work is on display at the San Francisco Museum of Modern Art. The Wall Street Journal spoke to Ms. Oxman about the future of urban architecture and how she thinks design can be used as a tool to fight climate change.
The idea behind material ecology is to enable total synergy between grown and built environments by deploying new digital technologies that allow us to augment bio-based materials for large-scale construction.
It comes down to ethics and availability. We work with the most abundant biopolymers on the planet which include cellulose, found in plant cell walls; pectin, found in apple and lemon skins; and chitin, found in the shells of crustaceans.
Using technology, we can program biomaterials to degrade in response to changing environmental conditions. At MIT, we built three biopolymer pavilions [the Aguahoja pavilions] which, instead of concrete, were built using shrimp shells, fallen leaves and apple skins. We programmed the pavilions to decay at a certain point when exposed to rainwater. This, in turn, nurtures soil microorganisms to fuel new growth.
It’s a circular economy of material that could be used to create biodegradable refugee camps, for example. Once the refugees find a safe haven, the camps would be programmed to melt away in the rain.
It’s complex. When we combine biopolymers including chitosan, pectin and cellulose, the material’s ability to absorb water varies based on its composition. Chitosan, for example, is naturally water-resistant and doesn’t readily dissociate when submerged, while pectin is hydrophilic and dissolves rapidly. By choosing how we blend these components, we can access a spectrum of hydrophilicity—otherwise known as a material’s affinity to water—and this lets us tune or program the speed at which a material breaks down. In essence, we are designing the architectural equivalent of metabolic rate.
For grown buildings to appear in towns and cities, we need to rethink mass production, and this will take five to 10 years to happen in a meaningful way. However, the development of products made from biological materials—cars, for example—could begin within the next year.
The architect and professor Carl Elefante says that “the greenest building is one that is already built.” That’s because the carbon emitted during construction is vast compared to the operating emissions of a given building. We therefore need to find new ways to augment the pre-existing built environment rather than trying to completely rebuild our cities from the ground up.
We need to look at a range of interventions. One is the creation of bioengineered façades for existing buildings. An example: in the U.S. alone, hundreds of billions of square feet of glass façade components are produced every year. As part of our research at MIT, we 3D-printed glass augmented with synthetically engineered microorganisms to produce energy [from the sun]. This allows us to develop solar-harnessing glass façades that can act as a skin for pre-existing buildings.
We must also think about whole-building recycling. A current example is Apple’s headquarters in Cupertino, Calif. The campus was built by Norman Foster using materials from old buildings that used to be on the same site. Rather than simply destroying structures when we no longer have use for them, we must look for ways to augment them using new technology and intelligence.
The architect of the future is interested in formation, as much as she is interested in form. She is a systems thinker, interested in building relationships between objects rather than seeing them as standalone. She invents new technologies with which to design, manufacture and build. She is a gardener, not a master planner
Reprinted by permission of The Wall Street Journal, Copyright 2021 Dow Jones & Company. Inc. All Rights Reserved Worldwide. Original date of publication: April 10, 2022.
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A five-bedroom Palo Alto home designed by Steven Ehrlich is listed for $44 million, making it the city’s most expensive listing. Built around a dramatic concrete spine, the home features four courtyards and a pool.
3 min
For years, tech entrepreneur Asher Waldfogel and his wife, Helyn MacLean, dreamed of building a modern house in Palo Alto, Calif.
The couple, however, worried about clashing with the Mediterranean-style architecture typically associated with their neighborhood of Old Palo Alto.
So they tapped architect Steven Ehrlich to create a design that paid homage to its surroundings with stucco, mahogany and titanium zinc cladding. They spent $20 million over several years building the house, completed in 2005.
Now looking to be closer to their adult daughter on the East Coast, they are putting the five-bedroom home on the market for $44 million—the most expensive listing in Palo Alto.
Waldfogel is an angel investor who co-founded Redback Networks, a telecommunications-equipment company. MacLean previously had a career in fundraising.
The couple purchased the roughly 0.4-acre site for $7.1 million in 2000 and demolished a circa-1930s Spanish Colonial home. The house they built pinwheels around a central staircase. It has 7,900 square feet of livable space, with four distinct courtyards and a pool.
A key feature of the home is a cast-in-place concrete wall, or spine, that is two stories high and about 80 feet long. “There’s a little bit of controlled chaos in what comes out of the form,” unlike a perfectly uniform surface, Waldfogel said. “If you want that, you do it in plastic.”
Waldfogel said he and his wife are thinking about the next phase of life now that their daughter is grown, although they have not decided where they will move. They also have a home in Sun Valley, Idaho.
“Right now we’re just trying to emotionally let go and decide what to do next,” he said.
Palo Alto, an epicenter of venture capital and tech startups in Silicon Valley, is home to some of the country’s biggest tech titans. Sales volume and prices are rising, with a median sale price of $3.5 million for the three months ending in August, up 5.8% year-over-year, according to real-estate brokerage Redfin.
Arthur Sharif of Sotheby’s International Realty—San Francisco Brokerage has the listing.
