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Brown University News
Blue Light Technique Will Advance Nanoscale Tech
PROVIDENCE, R.I., April 21, 2023 — Researchers at Brown University have developed an approach to scattering-type scanning near-field microscopy (s-SNOM) that uses blue light to enable measurement of electrons in semiconductors, as well as other nanoscale materials. The findings, which the researchers said are a first in nanoscale imaging, provide a workaround to a long-standing problem that has limited the study of key phenomena in a variety of materials that could one day lead to more energy-efficient semiconductors and
Hydrogel Improvements Boost Utility of Expansion Microscopy
PITTSBURGH, Jan. 5, 2022 — Collaborators from Carnegie Mellon University, the University of Pittsburgh, and Brown University have described a microscopy technique and set of protocols that overcome a bottleneck to the expansion microscopy method. The collaborators developed...
Infrared Spectroscopy Technique Unveils Insights into Planet Formation
PROVIDENCE, R.I., Nov. 10, 2020 — Planetary scientists at Brown University have introduced an infrared spectroscopic method for studying olivine, a mineral that provides insights into the formation of the moon, Mars, and other planetary bodies. Informally dubbed “crossover...
Photomultiplier Tubes from Brown Team Will Be the 'Eyes' of New Dark Matter Detector
PROVIDENCE, R.I., Jan. 25, 2019 — Brown University researchers have assembled two arrays of photomultiplier tubes (PMTs) to serve as the “eyes” for the LUX-ZEPLIN (L-Z) dark matter detector, which will begin its search for dark matter particles at the Sanford Underground Research...
Data Transmission via Terahertz Multiplexer
PROVIDENCE, R.I., Aug. 14, 2017 — A method for multiplexing data — the ability to send multiple signals through a single channel of a voice or data communication system — carried on terahertz waves and high-frequency radiation may enable the next generation of ultra-high bandwidth...
Chemical Treatment Makes 3-D Cell Cultures Clearer
PROVIDENCE, R.I., Sept. 8, 2014 — A chemical treatment could lead to better imaging of cells in 3-D cultures. A team at Brown University made the finding while studying how neural tissues grow from stem cells. The researchers created sphere-shaped cell cultures to allow the cells to...
Optogenetics Heightens Whisker Sensitivity in Mice
PROVIDENCE, R.I., Aug. 25, 2014 — Researchers have heightened the sensitivity of mouse whiskers by using optogenetics to create gamma waves in the brain. A team from Brown University used pulses of blue light to manipulate inhibitory interneurons in the primary sensory neocortex of...
Optogenetics Moves Closer to Primate Brains
PROVIDENCE, R.I., Dec. 13, 2013 — The most definitive demonstration yet that optogenetics can be safe and effective in brains larger and more complex than those of rodents could incorporate the use of light pulses to genetically alter brain cells in primates. Neuroscientists at...
Spectroscopy method could lead to better optical devices
PROVIDENCE, R.I. – A new spectroscopy method takes advantage of a fundamental property of thin films – interference – and could help optical devices like LEDs and solar cells make better use of these materials. The technique, called energy-momentum...
Advances in Standoff Detection Make the World Safer
Apr 1, 2013 — An abundance of new research and development in optical detection at a distance is increasing the ability of governments and military organizations to more efficiently identify and categorize explosives, biological agents and other threats....
Spectroscopy Method Could Lead to Better Optical Devices
PROVIDENCE, R.I., March 6, 2013 — A new spectroscopy method that takes advantage of a fundamental property of thin films — interference — could help make better use of these materials in optical devices like LEDs and solar cells.
Single nanomaterial yields a laser rainbow
PROVIDENCE, R.I. – Nanocrystals that produce red, green and blue laser light from a single material could lead to digital displays and other devices that employ a variety of laser colors simultaneously. Red, green and blue lasers have become small and cheap...
Nanomaterial Yields Many Laser Colors
PROVIDENCE, R.I., May 1, 2012 — Nanocrystals that can produce red, green and blue laser light from a single material could open the door to digital displays and other devices that employ a variety of laser colors all at once.
Biochip Measures Glucose in Saliva, Not Blood
PROVIDENCE, R.I., Jan. 24, 2012 — For the 26 million Americans with diabetes, drawing blood, which is invasive and at least minimally painful, is the most prevalent method of checking glucose levels. Now researchers at Brown University are working on a new biological device that...
Skin ‘Sees’ UV Light, Produces Melanin
PROVIDENCE, R.I., Nov. 9, 2011 — A light-sensitive receptor (rhodopsis) previously thought to exist only in the eye has been found in human skin cells, detecting certain wavelengths of ultraviolet light to protect DNA from damage. Skin cells, called malanocyte, send out...
Early Light Refines Brain’s Circuitry for Vision
PROVIDENCE, R.I., June 9, 2011 — Two new studies from Brown University on different species and using different techniques show how nascent animal brains use light to construct their central vision system. Creatures are not born hard-wired to see. Instead, they depend on...
Sensing Technology Keeps a Remote Eye over India
NEW DELHI – In India and other developing nations, the interactions of people with the soil, water, and plant and animal life around them have taken on an urgency in recent years as the country’s population grows, its cities expand and its dependence on...
‘Sonic Boomlets’ Used to Cut Nanotubes
PROVIDENCE, R.I., Dec. 23, 2010 — For the first time researchers have documented how single-walled carbon nanotubes are cut, a finding that could lead to producing more precise, higher-quality nanotubes. According to the researchers at Brown University and in Korea, such...
Landings Hard for Some Bats
PROVIDENCE, R.I., March 20, 2009 – Brown University researchers have used motion-capture cameras to document that the impact with which a bat lands varies according to its species. Two cave-dwelling species landed with an impact one-third that of their body weight, whereas a...
Nanoscientist Jimmy Xu Named AAAS Fellow
Dec 29, 2008 — Brown University nanoscientist Jimmy Xu is one of five Brown faculty members awarded this year with the distinction of fellow from the American Association for the Advancement of Science (AAAS), the largest general scientific society. Xu, whose...
Particles Detect Cancer
PROVIDENCE, R.I., May 27, 2008 -- The smallest magnetic nanoparticles created to date can be sent on such seek-and-find missions for tumor cells and emit signals MRI scans can detect. Brown University chemist Shouheng Sun and a team of researchers have created peptide-coated iron...
Polariton Propagation Probed
PROVIDENCE, R.I., July 18, 2007 -- An experiment modeled on the classic “Young’s double-slit experiment" has powerfully reinforced the understanding that surface plasmon polaritons (SPPs) propagate and diffract just like any other wave. The demonstration is a reminder that...
X-Ray System Aims to Show Skeletal Movement in 3-D
PROVIDENCE, R.I., Feb. 5, 2007 -- A new technology is being created that will allow doctors and scientists to do the seemingly impossible: See inside living humans and animals and watch their bones move in three dimensions as they run, fly, jump, swim and slither. This...
DNA-Based Nanowires can Create, Detect Light
PROVIDENCE, R.I., July 21, 2006 -- For the first time, a research team has used the coding power of DNA to create nanowires on top of carbon nanotube tips. The tiny new structures can create and detect light, and, with mechanical pressure, generate electricity. The wires' optical and...
BrainGate Trial Shows Promise for Motor Impaired
PROVIDENCE, R.I., July 13, 2006 -- In a pilot trial of a device dubbed BrainGate, a man with paralysis of all four limbs could open simulated e-mail, play a game of Pong and adjust the volume on a TV using only his thoughts. The findings could offer hope to people with severe motor...
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May 2024
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