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Ecole Polytechnique Fédérale de Lausanne


New microscopy method for quick and reliable 3-D imaging of curvilinear nanostructures

EPFL researchers have developed a scanning transmission electron microscopy (STEM) method to generate fast and reliable 3D images of complex curvilinear structures. This tilt-less 3D electron imaging technique can acquire images in a single shot, opening up new avenues for real-time 3D imaging of dynamic material and biological processes.

SourceEcole Polytechnique Fédérale de Lausanne·JournalScientific Reports·DateSep 6, 2017

Unraveling the mystery of snowflakes, from the Alps to Antarctica

Researchers at EPFL's Environmental Remote Sensing Laboratory developed an algorithm to classify six different classes of snowflakes, improving precipitation measurement and forecast accuracy. The study used high-resolution images of snowflakes taken from three angles and analyzed their shape, geometry, and electromagnetic properties.

SourceEcole Polytechnique Fédérale de Lausanne·JournalAtmospheric Measurement Techniques·DateApr 6, 2017

Measuring time without a clock

Researchers at EPFL have determined a delay of one billionth of one billionth of a second in photoemission by measuring the spin of photoemitted electrons. This discovery has significant implications for understanding the properties of electrons in solids and advancing spectroscopy techniques.

SourceEcole Polytechnique Fédérale de Lausanne·JournalPhysical Review Letters·DateFeb 8, 2017

How fast is the universe expanding? Quasars provide an answer

The H0LiCOW collaboration has made a new measurement of the Hubble constant using quasars and gravitational lensing. The result agrees with recent independent studies but disagrees significantly with cosmic microwave background measurements, potentially indicating new physics beyond the standard cosmological model.

SourceEcole Polytechnique Fédérale de Lausanne·JournalMonthly Notices of the Royal Astronomical Society·DateJan 26, 2017