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nanoparticles News
Supercritical Coupling Boosts Photon Upconversion
SINGAPORE, March 4, 2024 — Researchers at the National University of Singapore (NUS) have unveiled a novel concept termed supercritical coupling that enables a several-fold increase in photon upconversion efficiency. This discovery not only challenges existing paradigms, but also opens a new direction in the control of light emission, the team said. Photon upconversion, the process of converting low-energy photons into higher-energy ones, is a crucial technique with broad applications, ranging from superresolution
4D Printing Scheme Enables Light-Controlled Soft Robotics
ST. LUCIA, Australia, Jan. 15, 2024 — The process of 4D printing is an extension of 3D printing, in which solid objects are created using materials that can change shape when exposed to certain stimuli like heat, water or light. At the University of Queensland’s Australian...
Laser Surface Modification Aims to Reduce Infection from Implants
WEST LAFAYETTE, Ind., Oct. 19, 2022 — To help prevent infections caused by orthopedic implants, Purdue University researchers developed a laser-assisted surface modification process that may improve the efficacy of the implanted device. Most ortho device-related infections occur because...
3D Printing Tackles One of the Strongest Stainless Steels
GAITHERSBURG, Md., Sept. 26, 2022 — A team from the National Institute of Standards and Technology (NIST), the University of Wisconsin-Madison (UW-Madison), and Argonne National Laboratory have 3D-printed a variety of stainless steel that is favored for its high strength and corrosion...
Nanotech, Deep Learning Combine to Detect Pediatric Tuberculosis
SEATTLE, Sept. 15, 2022 — A technique for diagnosing tuberculosis (TB) in children takes advantage of the optical properties of gold nanoparticles to detect the disease. The technique uses an artificial intelligence (AI) algorithm to enhance the sensitivity of the test....
Nanoparticles, Light-Matter Interactions Spur Datacom Developments
CANBERRA, Australia, June 27, 2022 — Physicists at Australian National University (ANU) have developed translucent metasurfaces, described as slides, that produce two distinct images by manipulating the direction in which light travels through them. The newly introduced technology uses...
SERS-Based Nanosensor Detects Pesticides on Fruit
SOLNA, Sweden, June 13, 2022 — Researchers at the Karolinska Institutet in Sweden developed a nanosensor based on surface-enhanced Raman spectroscopy or scattering (SERS). The proof-of-concept method uses flame-sprayed silver nanoparticles to increase the signal of chemicals....
Laser Nanosoldering Boosts Conductivity of Nanoelectrodes
GUANGZHOU, China, Jan. 19, 2022 — Researchers at Jinan University and the Chinese Academy of Sciences developed a plasmon-enhanced laser nanosoldering technology to increase the electrical conductivity of silver (Ag) nanowires that are fabricated using femtosecond laser direct...
Light-Based and Lightweight, Aerogel Photocatalyst Enables Efficient Hydrogen Production
ZURICH, Dec. 22, 2021 — With appropriate pretreatment, aerogels could serve as efficient, visible light-active photocatalysts for industrial use. The Laboratory for Multifunctional Materials at ETH Zurich, headed by professor Markus Niederberger, demonstrated that...
Pulsed 'Laser-in-Liquids' Approach Speeds Catalyst Discovery
ROCHESTER, N.Y., Aug. 5, 2021 — A team at the University of Rochester showed the efficacy of pulsed lasers in accelerating research into chemical catalysts. The development of even a single catalyst material capable of triggering the arrangement and motion of the atoms needed to...
Photothermal Process Irradiates Nanoparticles to Control Cell Activity
ST. LOUIS, Aug. 2, 2021 — Using nanoparticles as photothermal nanotransducers, scientists at Washington University in St. Louis demonstrated reversible modulation of electrical activity in excitable nerve and heart muscle cells. The biocompatible, minimally invasive approach...
Light-Controlled Nanoparticles Support Noninvasive Nanomedicine
ST. PETERSBURG, Russia, May 13, 2021 — Scientists from ITMO University have developed a production method for bio-integrated optical nanomaterials based on Mie-resonant silicon nanoparticles. The nanoparticles used in the work are covered by biopolymer shells and can be controlled by...
Silver Ions’ Dispersion from Alloys Benefits Optical Sensors, Other Applications
HOUSTON, April 27, 2021 — A study led by Rice University and the University of Duisburg-Essen in Germany used hyperspectral dark-field imaging microscopy to reveal the multistep mechanism that causes silver ions to dissipate from gold-silver alloy nanoparticles. Gold-silver...
Gold Nanoparticle Plasmon Coupling Illuminates Thermal Sensing Possibilities
RALEIGH, N.C., March 31, 2021 — Researchers from North Carolina State University have described a method for achieving desirable optical properties by stretching shape-memory polymers embedded with gold nanoparticle clusters so as to alter their plasmon-coupling capabilities. The...
Lasers Move Diamond Nanoparticles into Bio Applications
SAPPORO, Japan, March 31, 2021 — Scientists from Hokkaido University, Osaka Prefecture University, and Osaka University showed the ability to use laser beams of different wavelengths, and from opposing directions, to move diamond nanoparticles that are roughly 50 nm in size in a...
SERS Chip Senses Near the Quantum Limit
BUFFALO, N.Y., Jan. 13, 2021 — University at Buffalo researchers have developed a chemical sensing chip that boasts a range of potential applications, from the detection of illicit substances and dangerous materials, to counterfeit prevention. The chip, which relies on...
Single Carbon Dot Emits Multiple Wavelengths of Light
DAEJON, South Korea, Dec. 14, 2020 — Researchers from the Korea Advanced Institute of Science and Technology (KAIST) have synthesized a collection of nanoparticles known as carbon dots, capable of emitting multiple wavelengths of light from a single particle. The team discovered that...
Shaping Light-Activated Nanocatalysts
HOUSTON, Sept. 25, 2020 — A comparative study from Rice University researchers in the college’s Laboratory for Nanophotonics (LANP) demonstrated how the shape of nanoparticles affects their ability to drive light-activated reactions. The work is part of LANP’s...
Potential of Periodic Array System Supports Nanophotonics Applications
ALBUQUERQUE, N.M., Sept. 7, 2020 — A research team from the University of New Mexico (UNM) and the Autonomous University of Madrid has applied periodic arrays containing nanoparticles of different sizes — as opposed to more conventional arrays that contain nanoparticles of a...
Model Guides Precise Formation of Plasmonic Components
ST. PETERSBURG, Russia, July 22, 2020 — Using a real-time mathematical analysis model developed at ITMO University, scientists will now be able to manipulate the process of creating photonic and plasmonic components to produce the precise optical properties that are needed in a material....
Scientists Demonstrate 310-nm Nanolaser in VIS Range at Room Temperature
ST. PETERSBURG, Russia, June 12, 2020 — An international scientific team led by researchers at ITMO University demonstrated experimentally what it believes to be the world’s most compact semiconductor laser operating in the visible range at room temperature. The nanolaser produces...
Engineers Adapt 2D 'Sandwich' for Surface-Enhanced Raman Spectroscopy
HOUSTON, May 18, 2020 — Tests at Rice University’s Brown School of Engineering of a two-dimensional Janus compound showed it could be an effective and universal platform for improving the detection of biomolecules via surface-enhanced Raman spectroscopy (SERS)....
Light-Emitting Nanosensors Track Chemical Signals in Plants
CAMBRIDGE, Mass., April 30, 2020 — An international research team led by Tedrick Lew and Michael Strano at the Massachusetts Institute of Technology have created a new device for observing variations in waves of hydrogen peroxide as they pass through the tissues of different species...
Photothermal Ablation of Endometriosis Possible Using Nanomedicine
PORTLAND, Ore., April 8, 2020 — Using photoresponsive nanoparticles loaded with dye, researchers at the Oregon State University College of Pharmacy and the Oregon National Primate Research Center have developed a way to identify and remove lesions associated with endometriosis, a...
Esther Wertz Wins NSF CAREER Award
TROY, N.Y., March 13, 2020 — The NSF has named Rensselaer Polytechnic Institute physicist Esther Wertz the winner of its CAREER award to support her investigation of nanometer-scale metal structures that will control light at the quantum limit. “I’m interested in...
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