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Mapping molecular arrangements to pave the way for better catalytic systems
Bright spots represent individual catalyst molecules captured under cryogenic conditions to prevent clustering.

Eric Stach of the School of Engineering and Applied Science and colleagues used neural networks to better identify the characteristics of catalysts that drive the creation of liquid fuels from sunlight. Shown here: The arrangement of a catalyst molecule, as observed under cryogenic conditions. The bright spots represent individual or small groups of molecules immobilized on a surface and the cryogenic temperature helps minimize clustering caused by the electron beam during imaging, allowing scientists to study the molecule’s distribution more accurately.

(Image: Sungho Jeon)

Mapping molecular arrangements to pave the way for better catalytic systems

The Stach Group in Penn Engineering led a collaborative team identifying how chemical catalysts drive the creation of liquid fuels from sunlight, paving the way for more efficient removal of greenhouse gases from the atmosphere.
The other emissions coming from cars
A gloved mechanic holds a new tire.

Image: iStock/dangrytsku

The other emissions coming from cars

Tiny tire particles discharge into the environment every time a vehicle brakes, accelerates, or rounds a curve. In a UN brief, geochemist Reto Gieré and colleagues aim to educate the world about this lesser-known environmental obstacle.

Michele W. Berger

Using data to make city planning more safe and accessible
Xiaoxia Dong.

Xiaoxia “Summer” Dong is an assistant professor of city and regional planning in the Weitzman School.

nocred

Using data to make city planning more safe and accessible

Weitzman School of Design’s Xiaoxia ‘Summer’ Dong focuses on the travel behavior and mode choice impacts of driverless cars.

From the Weitzman School of Design

1 min. read

A greener, cleaner way to extract cobalt
A large setup infrastructure for mining gold and other minerals in Australia.

(Image: Alfio Manciagli)

A greener, cleaner way to extract cobalt

Penn researchers led a collaborative effort pioneering safer, more sustainable technique to extract elements critical to battery-powered technologies. Findings pave the way for getting value from materials that would otherwise be considered waste.
Is ‘bypassing’ a better way to battle misinformation?
Cartoon images of grownups in failed negotiations over a laptop.

Image: iStock/Visual Generation

Is ‘bypassing’ a better way to battle misinformation?

Bypassing involves offering accurate information that has an implication opposite to that of the misinformation. New research from APPC finds bypassing may be superior to correction in forming beliefs, but not in attitude about the delivered information.

From the Annenberg Public Policy Center

A Q&A with the director of the Penn Center for AIDS Research
Four people in front of National AIDS Memorial Quilt.

Penn researchers affiliated with the Penn Center for AIDS Research (CFAR) attended AIDS Walk Philly in October 2024. Pictured with the National AIDS Memorial Quilt are Deratu Ahmed, a first-year epidemiology doctoral student studying pharmacogenetics related to HIV and tuberculosis in Botswana; Dominique Medaglio, a fourth-year epidemiology doctoral student studying ways to encourage smoking cessation for people with HIV in the United States; CFAR co-director Robert Gross, professor of medicine and epidemiology in the Division of Infectious Diseases at Penn Medicine; and CFAR director Ronald Collman, professor of medicine and microbiology.

(Image: Courtesy of Ronald G. Collman)

  • Q&A

    • A Q&A with the director of the Penn Center for AIDS Research

    Ronald G. Collman talks about the current state of AIDS care, work with the City of Philadelphia, and how the Center is supporting collaborations across campus.