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Displaying 701 - 725 of 4633

Single-frequency 571 nm VECSEL for photoionization of magnesium

June 3, 2016
Author(s)
Shaun C. Burd, Tomi Leinonen, Jussi-Pekka Penttinen, David T. Allcock, Daniel H. Slichter, Raghavendra Srinivas, Andrew C. Wilson, Micrea Guina, Dietrich G. Leibfried
… used for loading 25Mg+ ions in a surface-electrode RF Paul trap. These results demonstrate the applicability and … VECSEL, OPSL, SDL, frequency doubling, SHG, Ion trapping, Single frequency, Doppler-free spectroscopy, …

Measuring Ion-Pairing and Hydration in Variable Charge Supramolecular Cages with Microwave Microfluidics

May 17, 2019
Author(s)
Angela C. Stelson, Cynthia M. Hong, Mitchell C. Groenenboom, Charles A. Little, James C. Booth, Nathan D. Orloff, Robert G. Bergman, Kenneth N. Raymond, Kathleen A. Schwarz, F. D. Toste, Christian J. Long
… use microwave microfluidics to measure the hydration and ion pairing properties of two tetrahedral metal–organic cage … broadband measurements, we extract hydration numbers and ion pairing dynamics for the cages. We find that the cage … cage is more strongly hydrated and forms a more solvated ion pair compared to the K12(Ga4L6) cage. We show that …

Hydrophobically Modified Dendrimers as Inverse Micelles: Formation of Cylindrical Multidendrimer Nanostructures

September 1, 2001
Author(s)
Franziska Grohn, Barry J. Bauer, Eric J. Amis
… is sensitive only to the metal-salt-stained core. Gold salt inside the dendrimers was reduced to form colloidal … formed. The sizes are larger than would be expected if the gold salt loading of one dendrimer formed one particle, … colloid, cylinder, dendrimer, gold, micelle, nanostructure, pair distance distribution …

Electrostatic Influence on Ion Transport through the alpha HL Channel

October 1, 2003
Author(s)
M Misakian, John J. Kasianowicz
… The model demonstrates that rectification fo monovalent ion flow through the αHL channel can be related to the … alpha hemolysin, alpha toxin, electrostatics, ion channel, Nernst-Planck analysis … Electrostatic Influence on Ion Transport through the alpha HL Channel …

High Precision Measurements of Arsenic and Phosphorous Implantation Dose in Silicon by Secondary Ion Mass Spectrometry

June 1, 2002
Author(s)
P Chi, David S. Simons, J M. McKinley, F A. Stevie, C N. Granger
… to be accomplished with low systematic error. Secondary ion mass spectrometry (SIMS) has demonstrated the capability … that were investigated include analytical species, matrix ion species, energy bandpass, and sample holder design. With … energy distribution, high precision measurement, ion implentation, secondary ion mass spectrometry, …

Real-time measurements of plasma photoresist modifications: The role of plasma vacuum ultraviolet radiation and ions

May 23, 2012
Author(s)
Weilnboeck Florian, Nirav Kumar, Gottlieb Oehrlein, Ting-Ying Chung, D Graves, Mingqi Li, Eric A. Hudson, Eric C. Benck
… interactions of surface modifications introduced by ions, bulk material modifications by ultraviolet (UV)/vacuum … work identified the individual contributions of energetic ions and UV/VUV radiation, the dynamics of the concurrent … We studied the interactions of plasma radiation and ions with 193nm PR and 248nm PR in Ar plasma by in-situ …

Quantifying grating defects in X-ray Talbot-Lau interferometry through a comparative study of two fabrication techniques

April 24, 2025
Author(s)
Alexandre Pereira, Simon Spindler, Zhitian Shi, Lucia Romano, Michal Rawlik, Federica Marone, Martin Stauber, Marco Stampanoni, Daniel Josell
… Fabrication of micrometer-pitch high-aspect-ratio gold gratings, which are essential for measuring small … used technologies for manufacturing gratings are based on gold electroplating in polymeric or silicon templates. Here, … gold electrodeposition, gratings, imaging, superconformal, …

Optimal binary gratings for multi-wavelength magneto-optical traps

November 20, 2023
Author(s)
Oliver Burrow, Robert Fasano, Michael Wright, Wesley Brand, Wenbo Li, Andrew Ludlow, Erling Riis, Paul Griffin, Aidan Arnold
… Grating magneto-optical traps are an enabling quantum technology for portable … binary gratings for multi-wavelength magneto-optical traps …

Frequency Comparison of Al + and Hg + Optical Standards

June 24, 2007
Author(s)
Till P. Rosenband, David Hume, Anders Brusch, Luca Lorini, P. O. Schmidt, Tara M. Fortier, Jason Stalnaker, Scott A. Diddams, Nathan R. Newbury, W Swann, Windell Oskay, Wayne M. Itano, David J. Wineland, James C. Bergquist
… We compare the frequencies of two single ion frequency standards: 27 Al + and 199 Hg + . Systematic …

Dehydration vs. Deamination of N-Terminal Glutamine in Collision-Induced Dissociation of Protonated Peptide Ions

August 11, 2006
Author(s)
Pedatsur Neta, Quan-Long Pu, Lisa E. Kilpatrick, Xiaoyu Yang, Stephen E. Stein
… mass spectrometry in singly- and doubly-protonated peptide ions undergoing collision-induced dissociation in a triple … QLLLPLLLK and QLLLPLLLR show that the singly protonated ions undergo loss of ammonia and to a smaller extent loss of water, whereas the doubly protonated ions undergo predominantly loss of water. The fast …

Surface conductance and microwave scattering in semicontinous gold films

September 28, 2015
Author(s)
Jan Obrzut
… Semicontinous gold films 4 nm to 12 nm thick were characterized using … model. Within the percolation coverage of gold nanoparticles, the surface conductance increases from … which corresponds to volume conductivity of bulk metallic gold of about 4 107 S/m. The results demonstrate a convenient …

The red color in 19th century Thai glass studied by X-ray and optical spectroscopy

July 2, 2014
Author(s)
Bruce D. Ravel, Wantana Klysubun, G. Lawrence Carr, Christoph Hauzenberger
… evidence that the 19th century craftsmen produced "ruby-gold" glass, wherein the red coloration is caused by the dispersal of nanoscale metallic gold particles throughout the glass matrix. … X-ray absorption spectroscopy, optical spectroscopy, ruby-gold glass …

High-accuracy optical clocks based on group 16-like highly charged ions

October 3, 2022
Author(s)
Saleh Allehabi, Samuel Brewer, Vladimir Dzuba, Victor Flambaum, Kyle Beloy
… transitions in group 16-like highly charged ions as candidates for high-accuracy optical clocks, … including S-, Se-, and Te-like systems. For this class of ions, the ground 3PJ fi ne structure manifold exhibits … properties important for optical clock development. All ions discussed are suitable for production in small-scale ion …

Development of Certified Reference Materials of Ion-Implanted Dopants in Silicon for Calibration of Secondary Ion Mass Spectrometers

January 1, 2007
Author(s)
David S. Simons, Robert G. Downing, George P. Lamaze, Richard M. Lindstrom, Robert R. Greenberg, Rick L. Paul, Susannah Schiller, William F. Guthrie
… dopant species that is introduced into a silicon wafer by ion implantation. The certified dose (atoms/cm2) of the … of dopant concentration measurements with secondary ion mass spectrometers. Certification measurements were … arsenic, boron, CRM, ion implantation, neutron activation analysis, phosphorus, …

An Intense Slit Discharge Source of Jet-Cooled Molecular Ions and Radicals (T rot 30K)

July 1, 1996
Author(s)
D T. Anderson, S Davis, Timothy Zwier, David Nesbitt
… densities of radicals (> 10 12 /cm 3 ) and molecular ions (> 10 10 /cm 3 ), under long absoption path (80cm), … discharge, infrared, jet-cooled, molecular ions, radicals … An Intense Slit Discharge Source of Jet-Cooled Molecular Ions and Radicals (T rot 30K) …

Chirped magneto-optical trap of molybdenum

December 12, 2025
Author(s)
Sai Naga Manoj Paladugu, Nickolas Pilgram, Stephen Eckel, Eric Norrgard
… cryogenic beam of molybdenum atoms into a magneto-optical trap. By chirping the detuning of the trapping lasers, we … were able to enhance the number of atoms loaded into the trap by more than a factor of 2. We optimize the trapped … atoms are subsequently transferred to a magnetic trap where we achieve vacuum-limited lifetimes of 100 ms. …

Single molecule measurements within individual membrane-bound ion channels using a polymer-based bilayer lipid membrane chip

February 29, 2008
Author(s)
Louis P. Hromada, Brian J. Nablo, Michael Gaitan, John J. Kasianowicz, Don DeVoe
… A polymer microfluidic platform for electrophysiological ion channel measurements is presented. The system includes an … measurements, and multiple microchannels for independent ion channel and analyte delivery. Details of chip … bilayer membrane formation, and alpha-hemolysin ion channel incorporation are discussed. Using this …
Displaying 701 - 725 of 4633
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