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ScienceDaily: Top Technology News |
| Posted: 04 Feb 2022 01:17 PM PST Researchers have developed an instrument to image the acoustic waves generated by micromechanical resonators over a wide range of frequencies and produce 'movies' of them with unprecedented detail. |
| Discovery unravels how atomic vibrations emerge in nanomaterials Posted: 04 Feb 2022 11:52 AM PST A hundred years of physics tells us that collective atomic vibrations, called phonons, can behave like particles or waves. When they hit an interface between two materials, they can bounce off like a tennis ball. If the materials are thin and repeating, as in a superlattice, the phonons can jump between successive materials. Now there is definitive, experimental proof that at the nanoscale, the notion of multiple thin materials with distinct vibrations no longer holds. If the materials are thin, their atoms arrange identically, so that their vibrations are similar and present everywhere. Such structural and vibrational coherency opens new avenues in materials design, which will lead to more energy efficient, low-power devices, novel material solutions to recycle and convert waste heat to electricity, and new ways to manipulate light with heat for advanced computing to power 6G wireless communication. |
| Making metal–halide perovskites useful in planar devices through a new hybrid structure Posted: 04 Feb 2022 10:09 AM PST Two of the main drawbacks of using tin (Sn)-based metal halide perovskites (MHPs) in thin-film transistors have been simultaneously solved by an innovative hybrid 2D/3D structure. New findings will help unlock the potential of environmentally benign Sn-based MHPs in CMOS technology, paving the way for flexible and printable electronic devices. |
| Too many disk galaxies than theory allows Posted: 04 Feb 2022 09:35 AM PST The Standard Model of Cosmology describes how the universe came into being according to the view of most physicists. Researchers have now studied the evolution of galaxies within this model, finding considerable discrepancies with actual observations. |
| Researchers resurrect and improve a technique for detecting transistor defects Posted: 04 Feb 2022 08:33 AM PST Researchers have revived and improved a once-reliable technique to identify and count defects in transistors, the building blocks of modern electronic devices such as smartphones and computers. |
| Posted: 04 Feb 2022 06:31 AM PST An 8% increase in summer air conditioning demand can be expected in the U.S. when the global average temperature exceeds 1.5 degrees Celsius above pre-industrial levels. This climate driven increase is likely to cause prolonged blackouts during peak summer heat if states do not expand capacity or improve efficiency, according to a new study of household-level demand. |
| Liquid metals, surface patterns, and the romance of the three kingdoms Posted: 04 Feb 2022 06:31 AM PST Diverging and converging patterns forming on the surface of solidifying liquid metals resemble plotlines in a complex historical novel, in a new international study. The cyclic patterns observed are rare, and had not been observed in solidification structures prior to this. Better understanding and control of fundamental phase transitions and pattern formation could see future liquid metal applications in plasmonic sensing and high-efficiency electronics and optics. |
| New polymer fuel cells can operate at higher temperatures Posted: 03 Feb 2022 09:29 AM PST A new high-temperature polymer fuel cell that operates at 80-160 degrees Celsius, with a higher-rated power density than state-of-the-art fuel cells, solves the longstanding problem of overheating, one of the most significant technical barriers to using medium-and heavy-duty fuel cells in transportation vehicles such as trucks and buses. |
| CRISPR-Cas9 can generate unexpected, heritable mutations Posted: 02 Feb 2022 05:03 AM PST CRISPR-Cas9, the 'genetic scissors', creates new potential for curing diseases; but treatments must be reliable. In a new study, researchers have discovered that the method can give rise to unforeseen changes in DNA that can be inherited by the next generation. These scientists therefore urge caution and meticulous validation before using CRISPR-Cas9 for medical purposes. |
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