Princeton University

This unassuming material is capable of capturing or releasing carbon dioxide from the atmosphere in response to moisture swings.
Pulling carbon dioxide out of the air using moisture
Using radio waves to monitor nuclear weapons stockpiles
Princeton and Microsoft researchers have found a way to bring next-generation wireless technologies to bear on the massive problem of food waste, with a system that can effectively peek under the surface and determine the quality of a piece of fruit. The advance could help vendors optimize distribution and slash waste. Photos by Sameer A. Khan/Fotobuddy
Bringing next-generation wireless technologies to bear on the massive problem of food waste
Passive radiative cooling in unventilated and ventilated enclosures (A) View of an experimental cooling container used by Trombe and his team in Mont-Louis, France, undated.23 (B) Diagrammatic vertical section of Trombe’s patented design for the cold house, 1967.24 (C) North-east view showing the radiative cooling facade of the cold house designed and built by Felix Trombe and his team in 1963–1963 in Odeillo, France.25 (D) Schematic drawing of the Skytherm system during the day with the movable insulation covering the roof (left), and during the night with the water-filled bags exposed to the cold-infrared sky (right).27 (E) Harold Hay and John I. Yellott in front of a prototype of the Skytherm system built in Pheonix, Arizona in 1967.28 (F) Schematic of our test box, reproducing 1% of the thermal loads, losses, and air changes attributable to one occupant. (G) Schematic of the proportions of the thermal mass, radiator, and ventilation openings needed for one occupant.
Achieving passive cooling inside naturally conditioned buildings in hot arid climates
Salts form on the surface of the strings. (Photo by Bumper DeJesus)
New vistas for environmentally friendly lithium extraction?
Researchers are developing a way to incorporate uncertainty into machine learning systems
Princeton researchers work to improve the use of additive manufacturing for concrete and other cement-based materials. The research team, from left to right, Arjun Prihar, Reza Moini, Shashank Gupta, and Hadi Esmaeeli. Photos by Sameer Khan/Fotobuddy
3D printed cement gets a laser boost
Princeton researchers have found that human-language descriptions of tools can accelerate the learning of a simulated robotic arm lifting and using a variety of tools. Animation by the researchers; GIF by Neil Adelantar
Using words to teach robots
Fusion Breakthrough: Do we actually have liftoff?
A reaction cell (left) and the photocatalytic platform (right) used on tests of copper-iron plasmonic photocatalysts for hydrogen production from ammonia at Syzygy Plasmonics in Houston. All reaction energy for the catalysis came from LEDs that produced light with a wavelength of 470 nanometers. Courtesy of Syzygy Plasmonics, Inc.
Opening the door to entirely replace precious metals to produce hydrogen
New research shows that egg whites can be transformed into a material capable of filtering water. Photo by Nathan Dumlao
Using egg whites to to remove that can cheaply remove salt and microplastics seawater with 98+ percent efficiency
Blue Mountain Geothermal Plant, Nevada Geothermal Power (NGP), Humbolt County, Nevada. (Photo by Dennis Schroeder / NREL)
A major step forward to use geothermal technology for energy storage
CO2 Rail Car
Building direct air capture rail cars to utilize railway networks to help mitigate climate change
This work provides both understanding of the natural systems in algae that achieve high CO2 conversion rates and a roadmap for engineering in plants. Niall Mangan Assistant Professor of Engineering Sciences and Applied Mathematics
Enhancing the growth of food crops by understanding fast-growing algae
An AI project models first impressions based on facial features and can accurately predict how people will be perceived