Search Results - "Hexel, Cole R."

Cellular Uptake and Cytotoxicity of Gold Nanorods: Molecular Origin of Cytotoxicity and Surface Effects by Alkilany, Alaaldin M., Nagaria, Pratik K., Hexel, Cole R., Shaw, Timothy J., Murphy, Catherine J., Wyatt, Michael D.

“…Gold nanorods of different aspect ratios are prepared using the growth‐directing surfactant, cetyltrimethylammonium bromide (CTAB), which forms a bilayer on…”
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Optimization of uranium and plutonium separations using TEVA and UTEVA cartridges for MC-ICP-MS analysis of environmental swipe samples by Metzger, Shalina C., Rogers, Kayron T., Bostick, Debra A., McBay, Eddy H., Ticknor, Brian W., Manard, Benjamin T., Hexel, Cole R.

“…The analysis of environmental swipe samples for ultra-trace uranium (U) and plutonium (Pu) determinations is essential in the nuclear safeguards community…”
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Determination of phosphorus and sulfur in uranium ore concentrates by triple quadrupole inductively coupled plasma mass spectrometry by Fletcher, Nathaniel D., Manard, Benjamin T., Bostick, Debra A., Bostick, William D., Metzger, Shalina C., Ticknor, Brian W., Rogers, Kayron T., Hexel, Cole R.

“…The analysis of impurities in a uranium ore concentrate (UOC) could provide information regarding the source, production history, and potential intended use of…”
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Evaluation and Specifications for In-Line Uranium Separations Using Inductively Coupled Plasma Optical Emission Spectroscopy (ICP-OES) Detection for Trace Elemental Analysis by Manard, Benjamin T., Metzger, Shalina C., Quarles, C. Derrick, Rogers, Kayron T., Ticknor, Brian W., Bostick, Debra A., McBay, Eddy H., Hexel, Cole R.

“…Automated introduction platforms integrated with inductively coupled plasma optical emission spectroscopy (ICP-OES) systems are continuously being improved…”
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Towards Automated and High-Throughput Quantitative Sizing and Isotopic Analysis of Nanoparticles via Single Particle-ICP-TOF-MS by Manard, Benjamin T, Bradley, Veronica C, Quarles, Jr, C Derrick, Hendriks, Lyndsey, Dunlap, Daniel R, Hexel, Cole R, Sullivan, Patrick, Andrews, Hunter B

“…The work described herein assesses the ability to characterize gold nanoparticles (Au NPs) of 50 and 100 nm, as well as 60 nm silver shelled gold core…”
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Investigation of the 176Yb Interference Correction during Determination of the 176Hf/177Hf Ratio by Laser Ablation and Solution Analysis on the Neoma MC-ICP-MS by Nasser A. Zirakparvar, Benjamin T. Manard, Cole R. Hexel, Daniel R. Dunlap

“…We utilized the Neoma™, a recently released MC-ICP-MS platform offered by ThermoFisher Scientific, to assess the behavior of the Lu-Yb-Hf system during laser…”
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Rare Earth Element Determination in Uranium Ore Concentrates Using Online and Offline Chromatography Coupled to ICP-MS by Veronica C. Bradley, Benjamin T. Manard, Benjamin D. Roach, Shalina C. Metzger, Kayron T. Rogers, Brian W. Ticknor, Sarah K. Wysor, John D. Brockman, Cole R. Hexel

“…The determination of trace elements, particularly rare earth elements, in uranium ore concentrates (UOCs) is important as the pattern can be indictive ore…”
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A preliminary investigation into the feasibility of laser ablation U-Pb isotope ratio measurement via all-faraday cup detection with 10 11 - and 10 13 -Ω amplifiers on the Neoma multicollector-inductively coupled plasma-mass spectrometer by Zirakparvar, N Alex, Manard, Benjamin T, Dunlap, Daniel, Hexel, Cole R

“…Signal detection for uranium-lead (U-Pb) dating of zircon is typically performed via ion counters. Here, we develop a preliminary understanding of the…”
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A preliminary investigation into the feasibility of laser ablation U–Pb isotope ratio measurement via all‐faraday cup detection with 1011‐ and 1013‐Ω amplifiers on the Neoma multicollector‐inductively coupled plasma‐mass spectrometer by Zirakparvar, N. Alex, Manard, Benjamin T., Dunlap, Daniel, Hexel, Cole R.

“…Rationale Signal detection for uranium–lead (U–Pb) dating of zircon is typically performed via ion counters. Here, we develop a preliminary understanding of…”
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A NanoSIMS 50 L Investigation into Improving the Precision and Accuracy of the 235U/238U Ratio Determination by Using the Molecular 235U16O and 238U16O Secondary Ions by N. Alex Zirakparvar, Cole R. Hexel, Andrew J. Miskowiec, Julie B. Smith, Michael W. Ambrogio, Douglas C. Duckworth, Roger Kapsimalis, Brian W. Ticknor

“…A NanoSIMS 50 L was used to study the relationship between the 235U/238U atomic and 235U16O/238U16O molecular uranium isotope ratios determined from a variety…”
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Automated Separation of Uranium and Plutonium from Environmental Swipe Samples for Multiple Collector Inductively Coupled Plasma Mass Spectrometry by Metzger, Shalina C, Ticknor, Brian W, Rogers, Kayron T, Bostick, Debra A, McBay, Eddy H, Hexel, Cole R

“…A fully automated method for the separation of low-concentration uranium from plutonium in environmental swipe samples has been developed. The offline…”
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Uranium Single Particle Analysis for Simultaneous Fluorine and Uranium Isotopic Determinations via Laser-Induced Breakdown Spectroscopy/Laser Ablation–Multicollector–Inductively Coupled Plasma–Mass Spectrometry by Manard, Benjamin T., Quarles, C. Derrick, Bradley, Veronica C., Spano, Tyler L., Zirakparvar, N. Alex, Ticknor, Brian W., Dunlap, Daniel R., Cable-Dunlap, Paula, Hexel, Cole R., Andrews, Hunter B.

“…Uranyl fluoride (UO2F2) particles (<20 μm) were subjected to first-of-its-kind analysis via simultaneous laser-induced breakdown spectroscopy (LIBS) and laser…”
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Microextraction–TQ–ICP–MS for the Direct Analysis of U and Pu from Cotton Swipes by Bradley, Veronica C., Ticknor, Brian W., Dunlap, Daniel R., Zirakparvar, N. Alex, Metzger, Shalina C., Hexel, Cole R., Manard, Benjamin T.

“…The microextraction sampling technique was integrated with triple quadrupoleinductively coupled plasma–mass spectrometry (TQ–ICP–MS) to directly sample and…”
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Development of a fast and efficient analytical technique for the isotopic analysis of fission and actinide elements in environmental matrices by Roach, Benjamin D., Fenske, Emilie K., Ilgner, Ralph H., Hexel, Cole R., Haverlock, Tamara J., Giaquinto, Joseph M.

“…•Rapid separation-direct analysis method analyzing 48 elements in a single sample.•The average isotopic detection limit is at the low picogram…”
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Direct Uranium Isotopic Analysis of Swipe Surfaces by Microextraction-ICP-MS by Manard, Benjamin T, Rogers, Kayron T, Ticknor, Brian W, Metzger, Shalina C, Zirakparvar, N. Alex, Roach, Benjamin D, Bostick, Debra A, Hexel, Cole R

“…The ability to directly measure uranium isotope ratios on environmental swipes has been achieved through a solution-based microextraction process and…”
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Direct isotopic analysis of solid uranium particulates on cotton swipes by microextraction-ICP-MS by Bradley, Veronica C., Spano, Tyler L., Metzger, Shalina C., Ticknor, Brian W., Dunlap, Daniel R., Zirakparvar, N. Alex, Roach, Benjamin D., Hexel, Cole R., Manard, Benjamin T.

“…Direct isotope ratio analysis of solid uranium particulates on cotton swipes was achieved using a solution-based microextraction technique, coupled to a…”
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Characterization of Uranium Uptake Kinetics from Seawater in Batch and Flow-Through Experiments by Kim, Jungseung, Oyola, Yatsandra, Tsouris, Costas, Hexel, Cole R, Mayes, Richard T, Janke, Christopher J, Dai, Sheng

“…A laboratory study of uranium uptake from seawater has been conducted using batch and flow-through recycling experiments. Uranium adsorption from seawater,…”
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Rapid and automated separation of uranium ore concentrates for trace element analysis by inductively coupled plasma – optical emission spectroscopy/triple quadrupole mass spectrometry by Manard, Benjamin T., Bostick, Debra A., Metzger, Shalina C., Ticknor, Brian W., Zirakparvar, N. Alex, Rogers, Kayron T., Hexel, Cole R.

“…The present study documents an automated approach to performing elemental analysis on a large group uranium ore concentrate (UOC) samples. Here, 17 UOC…”
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Preliminary investigation of an uncertainty budget for uranium isotope ratio analysis using a liquid sampling—atmospheric pressure glow discharge—orbitrap mass spectrometer system by Goodwin, Joseph V., Manard, Benjamin T., Ticknor, Brian W., Rogers, Kayron T., Hexel, Cole R., Cable-Dunlap, Paula, Marcus, R. Kenneth

“…The liquid sampling-atmospheric pressure glow discharge (LS-APGD) ionization source has proven to be an effective analysis tool for making uranium isotope…”
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A new highly enriched 233U reference material for improved simultaneous determination of uranium amount and isotope amount ratios in trace level samples by Essex, Richard M., Williams, Ross W., Rogers, Kayron T., Hexel, Cole R., Parsons-Davis, Tashi, Treinen, Kerri C.

“…A highly-enriched 233U reference material (>0.99987 n(233U)/n(U)) has been prepared and characterized for use as an isotope dilution mass spectrometry spike…”
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