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Showing 1 to 12 of 120 entries
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Applications and limitations of electron correlation microscopy to study relaxation dynamics in supercooled liquids.

Ultramicroscopy

Zhang P, He L, Besser MF, Liu Z, Schroers J, Kramer MJ, Voyles PM.
PMID: 27638332
Ultramicroscopy. 2017 Jul;178:125-130. doi: 10.1016/j.ultramic.2016.09.001. Epub 2016 Sep 08.

Electron correlation microscopy (ECM) is a way to measure structural relaxation times, τ, of liquids with nanometer-scale spatial resolution using coherent electron scattering equivalent of photon correlation spectroscopy. We have applied ECM with a 3.5nm diameter probe to Pt

Patterning of sub-50 nm perpendicular CoFeB/MgO-based magnetic tunnel junctions.

Nanotechnology

Tryputen L, Tu KH, Piotrowski SK, Bapna M, Majetich SA, Sun C, Voyles PM, Almasi H, Wang W, Vargas P, Tresback JS, Ross CA.
PMID: 27005330
Nanotechnology. 2016 May 06;27(18):185302. doi: 10.1088/0957-4484/27/18/185302. Epub 2016 Mar 23.

Perpendicular magnetic tunnel junctions (p-MTJs) were patterned into nanopillars using electron-beam lithography to study their scaling and switching behaviour. Magnetoresistance measurements of annealed and unannealed p-MTJ films using scanning probe microscopy showed good agreement with Monte Carlo modeling. p-MTJ...

Using personalized computer models to custom-tailor ablation procedures for atrial fibrillation patients: are we there yet?.

Expert review of cardiovascular therapy

Boyle PM, Zahid S, Trayanova NA.
PMID: 28395557
Expert Rev Cardiovasc Ther. 2017 May;15(5):339-341. doi: 10.1080/14779072.2017.1317593. Epub 2017 Apr 17.

No abstract available.

Quantitative Measurement of Density in a Shear Band of Metallic Glass Monitored Along its Propagation Direction.

Physical review letters

Schmidt V, Rösner H, Peterlechner M, Wilde G, Voyles PM.
PMID: 26230801
Phys Rev Lett. 2015 Jul 17;115(3):035501. doi: 10.1103/PhysRevLett.115.035501. Epub 2015 Jul 14.

Quantitative density measurements from electron scattering show that shear bands in deformed Al88Y7Fe5 metallic glass exhibit alternating high and low density regions, ranging from -9% to +6% relative to the undeformed matrix. Small deflections of the shear band from...

Stabilization of copper catalysts for liquid-phase reactions by atomic layer deposition.

Angewandte Chemie (International ed. in English)

O'Neill BJ, Jackson DH, Crisci AJ, Farberow CA, Shi F, Alba-Rubio AC, Lu J, Dietrich PJ, Gu X, Marshall CL, Stair PC, Elam JW, Miller JT, Ribeiro FH, Voyles PM, Greeley J, Mavrikakis M, Scott SL, Kuech TF, Dumesic JA.
PMID: 24282166
Angew Chem Int Ed Engl. 2013 Dec 16;52(51):13808-12. doi: 10.1002/anie.201308245. Epub 2013 Nov 26.

Atomic layer deposition (ALD) of an alumina overcoat can stabilize a base metal catalyst (e.g., copper) for liquid-phase catalytic reactions (e.g., hydrogenation of biomass-derived furfural in alcoholic solvents or water), thereby eliminating the deactivation of conventional catalysts by sintering...

Domain configurations in Co/Pd and L10-FePt nanowire arrays with perpendicular magnetic anisotropy.

Nanoscale

Ho P, Tu KH, Zhang J, Sun C, Chen J, Liontos G, Ntetsikas K, Avgeropoulos A, Voyles PM, Ross CA.
PMID: 26883011
Nanoscale. 2016 Mar 07;8(9):5358-67. doi: 10.1039/c5nr08865h.

Perpendicular magnetic anisotropy [Co/Pd]15 and L10-FePt nanowire arrays of period 63 nm with linewidths 38 nm and 27 nm and film thickness 27 nm and 20 nm respectively were fabricated using a self-assembled PS-b-PDMS diblock copolymer film as a...

Laparoscopic electrosurgery: complications and prevention.

Surgical technology international

Tucker RD, Voyles CR.
PMID: 25951554
Surg Technol Int. 1993 Oct;2:131-5.

Even though monopolar electrosurgery has been utilized laparoscopically for over two decades, post procedural complications, including bowel burns, remain significant. Initially employed by gynecologists, electrosurgical cutting and coagulation is rapidly becoming popular with general surgeons and urologists. Electrosurgery in...

Workflows for automated downstream data analysis and visualization in large-scale computational mass spectrometry.

Proteomics

Aiche S, Sachsenberg T, Kenar E, Walzer M, Wiswedel B, Kristl T, Boyles M, Duschl A, Huber CG, Berthold MR, Reinert K, Kohlbacher O.
PMID: 25604327
Proteomics. 2015 Apr;15(8):1443-7. doi: 10.1002/pmic.201400391. Epub 2015 Feb 14.

MS-based proteomics and metabolomics are rapidly evolving research fields driven by the development of novel instruments, experimental approaches, and analysis methods. Monolithic analysis tools perform well on single tasks but lack the flexibility to cope with the constantly changing...

Fluctuation microscopy: a probe of atomic correlations in disordered materials.

Journal of electron microscopy

Voyles PM, Gibson JM, Treacy MM.
PMID: 11108048
J Electron Microsc (Tokyo). 2000;49(2):259-66. doi: 10.1093/oxfordjournals.jmicro.a023805.

Fluctuation microscopy is a new technique to study medium-range structure in disordered materials. Low-resolution dark-field transmission electron microscope images are interpreted as spatially resolved diffraction maps. Statistical analysis of intensity variations in these maps provides information about higher-order atom...

A phenomenological model of fluctuation electron microscopy for a nanocrystal/amorphous composite.

Ultramicroscopy

Stratton WG, Voyles PM.
PMID: 18155358
Ultramicroscopy. 2008 Jul;108(8):727-36. doi: 10.1016/j.ultramic.2007.11.004. Epub 2007 Nov 19.

Fluctuation electron microscopy (FEM) is a quantitative electron microscopy technique in which we use the variance V of spatial fluctuations in nanodiffraction as a function of the diffraction vector magnitude k and real-space resolution R to detect medium-range order...

Variable resolution fluctuation electron microscopy on Cu-Zr metallic glass using a wide range of coherent STEM probe size.

Microscopy and microanalysis : the official journal of Microscopy Society of America, Microbeam Analysis Society, Microscopical Society of Canada

Hwang J, Voyles PM.
PMID: 21122191
Microsc Microanal. 2011 Feb;17(1):67-74. doi: 10.1017/S1431927610094109. Epub 2010 Dec 02.

We report variable resolution fluctuation electron microscopy (VRFEM) measurements on Cu64.5Zr35.5 metallic glass acquired using scanning transmission electron microscopy nanodiffraction using coherent probes 0.8 to 11 nm in diameter. The VRFEM results show that medium range atomic order structure...

Analytical and computational modeling of fluctuation electron microscopy from a nanocrystal/amorphous composite.

Ultramicroscopy

Yi F, Voyles PM.
PMID: 22982938
Ultramicroscopy. 2012 Nov;122:37-47. doi: 10.1016/j.ultramic.2012.07.022. Epub 2012 Jul 31.

A nanocrystal/amorphous composite is an idealized model of the medium-range order structure in a variety of amorphous materials. We have investigated the fluctuation electron microscopy (FEM) signal from such a model analytically and with computer simulations. In the analytical...

Showing 1 to 12 of 120 entries