Search results for Velasco

Optics & Photonics Dec 8, 2023

Conjoined 'racetracks' make new optical device possible

When we last checked in with Caltech's Kerry Vahala three years ago, his lab had recently reported the development of a new optical device called a turnkey frequency microcomb that has applications in digital communications, ...

Plasma Physics Dec 5, 2023

Physicist explains X-rays that shouldn't exist in 'cold' plasma

For about 20 years, Caltech Professor of Applied Physics Paul Bellan and his group have been creating magnetically accelerated jets of plasma, an electrically conducting gas composed of ions and electrons, in a vacuum chamber ...

Analytical Chemistry Nov 16, 2023

Chemists tackle formation of natural aerosols

City dwellers have long had to contend with smog—that ugly haze that hangs over urban areas—as a result of emissions-producing human activities as diverse as manufacturing, mowing the lawn, driving cars, and even cooking.

Bio & Medicine Sep 28, 2023

Wearable aptamer nanobiosensor wirelessly monitors estrogen in sweat

The sex hormone commonly known as estrogen plays an important role in multiple aspects of women's health and fertility. High levels of estrogen in the body are associated with breast and ovarian cancers, while low levels ...

Nanophysics Sep 21, 2023

Technique for 3D printing metals at the nanoscale reveals surprise benefit

Late last year, Caltech researchers revealed that they had developed a new fabrication technique for printing microsized metal parts containing features about as thick as three or four sheets of paper.

Bio & Medicine Sep 19, 2023

Drug delivery platform leverages air-filled protein nanostructures and uses sound for targeting

Chemotherapy as a treatment for cancer is one of the major medical success stories of the 20th century, but it's far from perfect. Anyone who has been through chemotherapy or who has had a friend or loved one go through it ...

Archaeology Sep 7, 2023

DNA analyses show St Helena's 'liberated' Africans came from West Central Africa between northern Angola and Gabon

Between 1840 and 1867, thousands of enslaved Africans who had been "liberated" from slave ships intercepted by the British Royal Navy were taken to the South Atlantic island of St Helena. But little is written in history ...

Mathematics Aug 10, 2023

What do a jellyfish, a cat, a snake, and an astronaut have in common? Math.

Across the animal kingdom there are creatures that move through their environments not by walking or running or climbing but instead by simply changing the shape of their bodies. This kind of locomotion is found in snakes ...

Condensed Matter Jul 27, 2023

Some alloys don't change size when heated, and we now know why

Nearly every material, whether it is solid, liquid, or gas, expands when its temperature goes up and contracts when its temperature goes down. This property, called thermal expansion, makes a hot air balloon float, and the ...

General Physics Jul 25, 2023

Better energy harvesting with 'law-breaking' device

If you take an object and set it out in the sun, it will begin to warm up. This is because it is absorbing energy from the sun's rays and converting that energy to heat. If you leave that object outside, it will continue ...

page 3 from 12