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Category: electronics

Superconducting TES array X-ray spectrometer goes into operation at BESSY II

Europe’s first and only TES spectrometer at a synchrotron source is now in operation at BESSY II, developed within a collaboration between the HZB, the MPI-CEC (Mühlheim-an-der-Ruhr, Germany) and the NIST (Boulder, Colorado, U.S.). The photon detection efficiency of the new instrument exceeds that of wavelength-dispersive X-ray emission spectrometers by a factor of 100 to 1,000. It will be used to investigate the electronic properties of atomically thin layers, nanostructures and highly diluted atomic and molecular samples. The team is looking forward to receiving exciting research proposals from the user community.

Synchrotron radiation sources such as BESSY II provide intense, highly brilliant X-ray light that can be used to examine a wide variety of samples. However, X-ray emission spectroscopy (XES) and Resonant Inelastic X-ray Scattering (RIXS), where the photons emitted from the sample are detected, are extremely photon-hungry techniques. Therefore, XES and RIXS have so far been largely limited to high-concentration and bulk samples. The details are presented in the journal Review of Scientific Instruments.

A heat sensor for living cells could offer new views of cell metabolism, rapid antibiotic testing

When living cells grow, divide or respond to drugs, they give off tiny amounts of heat that offer information about what the cells are doing. But because these heat signals are so vanishingly small, they have traditionally been impossible to measure directly. Researchers in the Harvard John A. Paulson School of Engineering and Applied Sciences (SEAS) have developed a calorimeter—a device that measures the heat transfer between a living system and its environment—that can detect metabolic heat signals on the order of 100 picowatts, or trillionths of a watt, in living cells.

The device is the most sensitive of any comparable bio-calorimeter to date. The new “pico-calorimeter” can track the metabolism of small populations of bacteria in real time, as well as monitor how bacterial growth changes in response to different antibiotics.

The work is from the lab of Joost Vlassak, the Abbott and James Lawrence Professor of Materials Engineering, and was carried out by Harvard associate Juanjuan Zheng, a former postdoctoral researcher in Vlassak’s lab. The research is published in the Proceedings of the National Academy of Sciences.

Long Duration Persistent Photocurrent in 3 nm Thin Doped Indium Oxide for Integrated Light Sensing and In‐Sensor Neuromorphic Computation

Mixed‐Dimensional Van der Waals Heterostructures Enabled Optoelectronic Synaptic Devices for Neuromorphic Applications

Yilin Sun, Yingtao Ding, Dan Xie.

Advanced Functional Materials

Physicists harness potential of quantum phase transitions

Researchers at University College Dublin and international collaborators have just published a detailed and accessible guide that aims to translate theoretical ideas into practical devices for quantum enhanced sensing technologies.

Conventional sensors have enabled technologies from global positioning systems to satellite imaging. Quantum systems, however, provide the absolute best precision allowable by the laws of physics.

The challenge, however, is that quantum devices are often fragile. A promising theoretical avenue for designing quantum sensors not hindered by this fragility is called “critical quantum sensing.”

Nvidia is canning the Control Panel, and I can’t be the only one who’s slightly sad to see it go

And two, the Nvidia App can be quite an online-focused affair in a way the old Control Panel was not. Besides the greyed-out checkbox in the Privacy settings labelled “required data” (something Nvidia explains is “Data that is necessary for Nvidia App to operate and cannot be switched off”), it can also lag quite badly on an unstable connection. In my personal experience, anyway.

Still, change comes for us all. I’ll miss the Control Panel’s classic rotating 3D image preview, the charmingly old-school HDCP menu that shows a rendering of an ancient Nvidia GPU plugged into what looks suspiciously like a plasma TV, and of course, the old Global Settings and Program Settings tabs with all of their many intricacies.

But is it progress? Perhaps. You can pry the Windows Control Panel from my cold, dead hands, though. That old clunker simply refuses to die, although I don’t think it’ll be that long before I write a similar obituary.

A new light-based sensor could help make ultrasensitive disease testing more portable

When we think about highly sensitive medical testing, we often imagine a hospital laboratory filled with large instruments, trained technicians, and carefully controlled conditions. This is especially true for optical biosensing, where scientists try to detect extremely small changes caused by biomolecules binding to a sensor surface.

These tiny changes can carry important information about disease, treatment response, or biological function. But detecting them often requires precise spectrometers, stable light sources, and carefully aligned instruments. This makes many advanced biosensing technologies powerful in the laboratory, but difficult to use in smaller clinics, remote regions, or point-of-care settings.

In our recent study, now published in Nature Photonics, we asked a simple question: Can we make high-performance label-free biosensing smaller, more robust, and easier to scale, without sacrificing sensitivity?

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