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Avalanching nanoparticles observed - a potentially significant step in technological transformation

14 Jan 2021
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Columbia engineers are the first to have observed avalanches in nanoparticles. Following in the footsteps of photon avalanching (PA) forty years ago, researchers now look forward to the significant impact of the potential technical transformations afforded by newly demonstrated avalanching nanoparticles (ANP).
Image: An illustration of the chain-reaction process that underlies the photon avalanching mechanism Columbia Engineering researchers have realized in their nanoparticles. In this process, the absorption of a single low-energy photon sets off a chain reaction of energy transfers and further absorption events that result in many highly excited ions within the nanoparticle, which then release their energy in the intense emission of many higher-energy photons. ....

James Schuck , Emory Chan , Bruce Cohen , Changhwan Lee , Academy Of Sciences , Sungkyunkwan University , Lawrence Berkeley National Lab , Artur Bednarkiewicz Polish Academy Of Sciences , Columbia Engineering , Polish Academy , Molecular Foundry , Artur Bednarkiewicz , Yung Doug Suh , Korea Research Institute , Chemical Technology , ஜேம்ஸ் ஸ்சுக்க் , உணர்ச்சி சான் , காயங்கள் கோஹன் , கலைக்கழகம் ஆஃப் அறிவியல் , லாரன்ஸ் பெர்க்லி தேசிய ஆய்வகம் , கொலம்பியா பொறியியல் , போலீஷ கலைக்கழகம் , மூலக்கூறு ஃபவுண்டரி , யுங் டக் ஸ , கொரியா ஆராய்ச்சி நிறுவனம் , இரசாயன தொழில்நுட்பம் ,

Columbia engineers first to observe avalanches in nanoparticles

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IMAGE: An illustration of the chain-reaction process that underlies the photon avalanching mechanism Columbia Engineering researchers have realized in their nanoparticles. In this process, the absorption of a single low-energy photon.
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Credit: Miko?aj ?ukaszewicz/ Polish Academy of Sciences
New York, NY January 13, 2021 Researchers at Columbia Engineering report today that they have developed the first nanomaterial that demonstrates photon avalanching, a process that is unrivaled in its combination of extreme nonlinear optical behavior and efficiency. The realization of photon avalanching in nanoparticle form opens up a host of sought-after applications, from real-time super-resolution optical microscopy, precise temperature and environmental sensing, and infrared light detection, to optical analog-to-digital conversion and quantum sensing. ....

New York , United States , Columbia University , South Korea , Yawei Liu , P James Schuck , Emorym Chan , Artur Bednarkiewicz , Changhwan Lee , Brucee Cohen , Ayelet Teitelboim , Kaiyuan Yao , Yung Doug Suh , Angel Fernandez Bravo , Jemma Xu , James Schuck , Emory Chan , Bruce Cohen , Agata Kotulska , Energy Frontier Research Center At Columbia University , Key Laboratory Of Rare Earth Resource Utilization , Us Department Of Energy , Division Of Molecular Biophysics Integrated Bioimaging , Sungkyunkwan University , Academy Of Sciences , Changchun Institute Of Applied Chemistry ,

Shine on: Avalanching nanoparticles break barriers to imaging cells in real time

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IMAGE: At left: Experimental PASSI (photon avalanche single-beam super-resolution imaging) images of thulium-doped avalanching nanoparticles separated by 300 nanometers. At right: PASSI simulations of the same material.
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Credit: Berkeley Lab and Columbia University
Since the earliest microscopes, scientists have been on a quest to build instruments with finer and finer resolution to image a cell s proteins - the tiny machines that keep cells, and us, running. But to succeed, they need to overcome the diffraction limit, a fundamental property of light that long prevented optical microscopes from bringing into focus anything smaller than half the wavelength of visible light (around 200 nanometers or billionths of a meter) - far too big to explore many of the inner-workings of a cell. ....

United States , South Korea , P James Schuck , Artur Bednarkiewicz , Changhwan Lee , Ayelet Teitelboim , Kaiyuan Yao , Yung Doug Suh , Angel Fernandez Bravo , Jemma Xu , Emory Chan , Bruce Cohen , Agata Kotulska , University Of California , Energy Frontier Research Center , Columbia University Fu Foundation School Of Engineering , Lawrence Berkeley National Laboratory , Us Department Of Energy , Berkeley Lab Molecular Foundry , Academy Of Sciences , Sungkyunkwan University , Office Of Science , Berkeley Lab , Molecular Biophysics Integrated Bioimaging Division , Korea Research Institute Of Chemical Technology , Yaiwei Liu Chinese Academy Of Sciences ,