Results 51 to 60 of about 38,209 (292)

Size determination of the Centaur Chariklo from millimeter-wavelength bolometer observations

, 2000
Using the Max-Planck Millimeter Bolometer Array (MAMBO) at the IRAM 30m telescope we detected emission at 250 GHz from the Centaur Chariklo (1997 CU26). The observed continuum flux density implies a photometric diameter of 273 km. The resulting geometric
A'Hearn, Altenhoff, Altenhoff, Altenhoff, Bertoldi, Bus, Campins, Campins, Chadwick, Davies, F. Bertoldi, Jewitt, Jewitt, Jewitt, Jewitt, Jewitt, Johnson, K. M. Menten, Keller, Kowal, Levison, Luu, Luu, Marcialis, Millis, Peixinho, Spencer, Stern, Tegler, Tegler, W. J. Altenhoff   +30 more
core   +1 more source

Integrated focal plane arrays for millimeter-wave astronomy [PDF]

AIP Conference Proceedings, 2002
We are developing focal plane arrays of bolometric detectors for sub-millimeter and millimeter-wave astrophysics. We propose a flexible array architecture using arrays of slot antennae coupled via low-loss superconducting Nb transmission line to microstrip filters and antenna-coupled bolometers.
Bock, James J., Goldin, Alexey, Hunt, Cynthia, Lange, Andrew E., LeDuc, Henry G., Day, Peter K., Vayonakis, Anastasios, Zmuidzinas, Jonas   +7 more
openaire   +2 more sources

Elucidating the Role of Surface Ligands on the Oxidative Etching of Au Bipyramids During Photothermia Using Liquid Cell Transmission Electron Microscopy

Advanced Functional Materials, EarlyView.
Gold bipyramids can act as efficient plasmonic nanoheaters, but they often reshape during laser heating. This study shows that oxygen nanobubbles drive oxidative etching and that surface ligands control stability. CTAB‐ and citrate‐coated particles blunt and lose optical performance, whereas polystyrene sulfonate preserves shape and heating by ...
Irene López‐Sicilia, Valentina Girelli Consolaro, Sophie Marbach, Nancy Rahbany, Grégoire Petit, Ovidiu Ersen, Juan J. Giner‐Casares, Ali Abou‐Hassan   +7 more
wiley   +1 more source

Surveying Flux Density in Galaxies with Apparent Large Black Holes at Millimeter/Submillimeter Wavelengths

The Astrophysical Journal, 2023
We present millimeter and submillimeter continuum observations for 36 sources with potentially large black hole shadows at 230 and 345 GHz using the Submillimeter Array.
Wen-Ping Lo, Keiichi Asada, Satoki Matsushita, Hung-Yi Pu, Masanori Nakamura, Geoffrey C. Bower, Jongho Park, Makoto Inoue   +7 more
doaj   +1 more source

Magnetically Actuated Drops‐on‐Stilts Microrobots for Transport and Delivery of Hydrophobic Cargo

Advanced Materials Interfaces, EarlyView.
Iron oxide nanoparticles and oil droplets in external magnetic fields form “drops‐on‐stilts” microrobots that transport hydrophobic cargo. Tunable nanoparticle–droplet interactions generate stilt‐like structures. Field rotation enables walking, obstacle navigation, and collective motion.
Oluwafemi Ligan, Hrishabh Singh, Sahil Kulkarni, Hong Huy Tran, James M. Kikkawa, Daeyeon Lee, Ravi Radhakrishnan, Edward Steager, Hyun Koo, Kathleen Stebe   +9 more
wiley   +1 more source

THz Instruments for Space [PDF]

, 2007
Terahertz technology has been driven largely by applications in astronomy and space science. For more than three decades cosmochemists, molecular spectroscopists, astrophysicists, and Earth and planetary scientists have used submillimeter-wave or ...
Siegel, Peter H.
core   +1 more source

Bioresorbable Mo–W Electrodes: Toward an Extended Operational Lifetime Through Controlled Alloying and Oxide Coating Engineering

Advanced Materials Interfaces, EarlyView.
Bioresorbable electrochemical sensors face instability in biofluids. Although alloys can mitigate rapid in vivo dissolution, Mo–W remains underexplored for sensing. This work engineers Mo–W films with a nanocrystalline oxide coating, improving stability and enabling reliable oxygen and pH sensing for up to 10 days, highlighting their potential for ...
C. Fernandes, Filippo Franceschini, Kitty Baert, Jon Ustarroz, I. Taurino   +4 more
wiley   +1 more source

An overview of the planned CCAT software system [PDF]

, 2014
CCAT will be a 25m diameter sub-millimeter telescope capable of operating in the 0.2 to 2.1mm wavelength range. It will be located at an altitude of 5600m on Cerro Chajnantor in northern Chile near the ALMA site.
Brazier, Adam, Edwards, Kevin, Higgins, Ronan, Jenness, Tim, Marsden, Gaelen, Nikola, Thomas, Ossenkopf, Volker, Sayers, Jack, Schaaf, Reinhold, Shepherd, Martin C.   +9 more
core   +2 more sources

Linking Device Performance to Nanoscale Photoactivation of Grain Boundaries in 2D Hybrid Halide Perovskites

Advanced Materials Technologies, EarlyView.
The opto‐electronic response of polycrystalline (PEA)2PbBr4 thin films is investigated by correlating macroscopic photodetector performance with nanoscale mapping techniques. Grain boundary density is systematically tuned through crystallization control and linked to device responsivity.
Camilla Bordoni, Lorenzo Calcaterra, Andrea Ciavatti, Silvia Milita, Valentina Bonino, Lorenzo Margotti, Sara Cepić, Marisa Di Sabatino, Federico Boscherini, Daniela Cavalcoli, Beatrice Fraboni   +10 more
wiley   +1 more source

Wet Ball Milling Synthesis of Iron Oxide Nanoparticles for High‐Efficiency, Controllable Magnetic Hyperthermia in Ovarian Cancer

Advanced Materials Technologies, EarlyView.
A wet ball‐milling method is presented to synthesize iron magnetic nanoparticles and evaluate their magnetic hyperthermia performance. Optimized particles (∼270 nm, Ms ∼114 emu/g) achieve ∼50°C heating under clinically safe alternating magnetic fields, while pulsed‐field operation enables controlled temperature regulation (∼30°C).
Shahriar Mostufa, Bahareh Rezaei, Md Shahriar, Karla Mercedes Paz González, Anil Kumar, Changxue Xu, Yun Suk Eo, Ioannis H. Karampelas, Jenifer Gómez‐Pastora, Rui He, Kai Wu   +10 more
wiley   +1 more source