An international team of physicists including researchers from the U.S. Naval Research Laboratory has used a scanning tunneling microscope to create quantum dots with identical, deterministic sizes. The perfect reproducibility of these dots opens the door to quantum dot architectures completely free of uncontrolled variations, an important goal for technologies from nanophotonics to quantum information processing.
Navy researchers have recently demonstrated...
The Navy plans to deploy its first laser on a ship...
Scientists at the U.S. Naval Research Laboratory...
Comet ISON will be only about 1 million miles away from the sun's super-hot surface during its close encounter on Thanksgiving. On Monday, it looked like it was about to die even before it got there. On Tuesday, it appeared healthy again. Will it meet a fiery death (or survive) when it whips around the sun on Thursday? Scientists haven’t seen a comet behave this way before.
The U.S. Naval Research Laboratory (NRL)'s Acoustics Div., with Bluefin Robotics, executed a record setting 507 km (315 mile), long-endurance autonomy research mission using its heavyweight-class mine countermeasures autonomous underwater vehicle (AUV), Reliant. NRL's Reliant AUV, when equipped with a low-frequency broadband sonar system, is perhaps best known as the prototype for the new U.S. Navy Knifefish mine-hunter.
Research scientists at the U.S. Naval Research Laboratory have developed a novel low-cost, highly efficient spectral sensor for field analysis of solar cell irradiance performance and spectral distribution. Mobile solar power units have been recognized as a promising route toward decreasing the dependence of the military on fossil fuel generated power. To date, a multitude of mobile solar powered systems are under development.
Researchers at the U.S. Naval Research Laboratory (NRL) recently flew their fuel cell powered Ion Tiger UAV for 48 hours and 1 minute on April 16-18 by using liquid hydrogen fuel in a new, NRL-developed, cryogenic fuel storage tank and delivery system. This flight shatters their previous record of 26 hours and 2 minutes set in 2009 using the same vehicle, but with gaseous hydrogen stored at 5000 psi.
The Naval Research Laboratory aided both the 2009 and 2013 Presidential Inaugurations with a technology called CT-Analyst. The software modeling tool is designed to provide first responders with a tool that can provides accurate, instantaneous, 3D predictions of chemical, biological, and radiological agent transport in urban settings.
U.S. Naval Research Laboratory scientists have developed a second-generation, cost-effective polyetheretherketone (PEEK)-like phthalonitrile-resin demonstrating superior high-temperature and flammability properties for use in marine, aerospace, and domestic applications. The resin can be used to make composite components by established industrial methods and automated composite manufacturing techniques.
The Office of Naval Research (ONR) this week launched a collaborative initiative with university researchers focused on synthetic, or engineered, cells—part of a larger effort to use the smallest units of life to help Sailors and Marines execute their missions. ONR currently has multiple ongoing projects in the field of synthetic biology.
Scientists at the U.S. Naval Research Laboratory have fabricated a vapor sensor using a single monolayer of molybdenum disulfide (MoS2) on a silicon dioxide wafer. They show that it functions effectively as a chemical vapor sensor, exhibiting highly selective reactivity to a range of analytes, and providing sensitive transduction of transient surface physisorption events to the conductance of the monolayer channel.
Researchers at the U.S. Naval Research Laboratory have successfully demonstrated pulse tailoring, producing a time varying focal spot size known as “focal zooming” on the Nike laser, the world's largest operating krypton fluoride gas laser. The use of focal zooming in inertial fusion energy system is expected to reduce the required laser size, boosting efficiency and lowering costs
U.S. Naval Research Laboratory research physicists and engineers from the Plasma Physics Division, working at the High-frequency Active Auroral Research Program (HAARP) transmitter facility in Alaska have successfully produced a sustained high density plasma cloud in Earth's upper atmosphere. Previous attempts generated clouds with lifetimes of 10 minutes or less; this one lasted for more than one hour.
U.S. Naval Research Laboratory scientists, in collaboration with the Imperial College London and MicroLink Devices Inc., have proposed a novel triple-junction solar cell with the potential to break the 50% conversion efficiency barrier, which is the current goal in multijunction photovoltaic development.
Having blood drawn and analyzed to diagnose disease is a process that can take a few days, but what if your doctor could perform this analysis in moments, right before your eyes? That's the promise of "lab-on-a-chip" technology, and researchers are working on a variety of fronts to remove technical roadblocks. A new idea addresses the issue of sensor shelf life, showing how some such chips might be made to last for months or more until needed.
As part of their investigation of the effects ionizing radiation has on crystalline structures found in single-walled carbon nanotube transistors, U.S. Naval Research Laboratory engineers have recently shown these devices can stand up harsh space environments. This durability has been achieved through a combination of a hardened dielectric material and the natural isolation of the transistor.
To emulate the classical mechanics of physics found in space on full-scale replica spacecraft on Earth requires not only a hefty amount of air to 'float' the object, but a precision, frictionless, large surface area that will allow researchers to replicate the effects of inertia on man-made objects in space. The U.S. Naval Research Laboratory recently got that capability with a one-of-a-kind 75,000 gravity offset table made from a single slab of concrete.
A vessel hunting system called “Rough Rhino,” sponsored by the Office of Naval Research and deployed aboard U.S. aircraft, ships and partner nation ships operating in waters off the coast of Senegal and Cape Verde, has helped track more than 600 targets since it’s been in operation. The effort has culminated in 24 boardings.
Naval Research Laboratory scientists are leading a multiagency study which reveals that a very high-resolution Doppler radar has the unique capacity to detect individual cloud hydrometeors in the free atmosphere. This study will improve scientists' understanding of the dynamics and structure of cloud systems.
Scientists at the U.S. Naval Research Laboratory, Electronics Science and Technology Division, dive into underwater photovoltaic research to develop high bandgap solar cells capable of producing sufficient power to operate electronic sensor systems at depths of 9 m.
Naval Research Laboratory scientists have obtained a first-ever measured altitude profile of a dim extreme-ultraviolet terrestrial airglow emission that provides vital information needed to test and improve the accuracy of advanced techniques for remote sensing of the daytime ionosphere. They have obtained this altitude profile using scans from the Remote Atmospheric and Ionospheric Detection System (RAIDS) experiment.
A researcher working with images from NASA’s Solar Dynamic Observatory recently saw something he’d never seen before: a pattern of cells in the sun’s corona. Using a combination of conventional and magnetic imaging from several satellites and spacecraft, astronomer were able to build a 3D picture of what was happening on the sun’s surface.
Naval Research Laboratory engineers successfully demonstrated the robotic fluids transfer from a stationary platform to an unmanned surface vehicle in wave heights greater than 3 ft. The Rapid Autonomous Fuel Transfer project exhibits the ability to track the motion of a Sea Fox naval vessel, safely emplace a magnetic refueling fitting to an on-board refueling receptacle, and successfully complete fluids transfer.
Scientists at the Naval Research Laboratory are part of an international team that has pooled their radio observations into a database, producing the highest precision map to date of the magnetic field within our own Milky Way galaxy.
Robotic exploration to remote regions, to include distant planetary bodies, is often limited by energy requirements to perform, in repetition, even the simplest tasks. With this in mind, researchers at the U.S. Naval Research Laboratory are looking into a novel approach that could some day aid scientific space and planetary research without the need for power-intense options.
Scientists at the Naval Research Laboratory scientists have recently discovered very fast fluorescence emission rates in colloidal nanoplatelets, a new class of optical materials that are essentially atomically flat. If they can be used in future emitters, they would feature wide tunability and short decay time.
The Naval Research Laboratory Vehicle Research Section has successfully completed flight tests for the Autonomous Deployment Demonstration program. The final demonstration took place Sept. 1 at the Yuma Proving Grounds, Yuma, Ariz., and consisted of a series of eight balloon-drops at altitudes of up to 57,000 ft, delivering sensor-emplacement Close-In Covert Autonomous Disposable Aircraft vehicles within 15 ft of their intended landing locations.
A Naval Research Laboratory instrument designed to study the Earth's thermosphere is part of a future science mission that has been selected by NASA for evaluation for flight.
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