Extended abstract of a paper presented at Microscopy and Microanalysis 2013 in Indianapolis, Indi... more Extended abstract of a paper presented at Microscopy and Microanalysis 2013 in Indianapolis, Indiana, USA, August 4 – August 8, 2013.
ABSTRACT This shows that plasma FIB prepared specimens can be used for site specific specimen pre... more ABSTRACT This shows that plasma FIB prepared specimens can be used for site specific specimen preparation and increases throughput when combined with ex situ lift out and the EXpressLO method.
Theex situlift out (EXLO) adhesion forces are reviewed and new applications of EXLO for focused i... more Theex situlift out (EXLO) adhesion forces are reviewed and new applications of EXLO for focused ion beam (FIB)-prepared specimens are described. EXLO is used to manipulate electron transparent specimens on microelectromechanical systems carrier devices designed forin situelectron microscope analysis. A new patented grid design without a support film is described for EXLO. This new slotted grid design provides a surface for holding the specimen in place and also allows for post lift out processing. Specimens may be easily manipulated into a backside orientation to reduce FIB curtaining artifacts with this slotted grid. Large EXLO specimens can be manipulated from Xe+plasma FIB prepared specimens. Finally, applications of EXLO and manipulation of FIB specimens using a vacuum probe lift out method are shown. The vacuum probe provides more control for placing specimens on the new slotted grids and also allows for easy manipulation into a backside configuration.
ABSTRACT We present new data from the novel application of atom-probe tomography to the study of ... more ABSTRACT We present new data from the novel application of atom-probe tomography to the study of nanodiamonds from the meteorite Allende. The mean meteoritic ^12C/^13C peak ratio is higher than that of our standards, but there are instrumental artifacts.
A method is described for quantitatively analyzing the level of interconnectivity of solid-oxide ... more A method is described for quantitatively analyzing the level of interconnectivity of solid-oxide fuel cell electrode phases. The method was applied to the three-dimensional microstructure of a Ni-Y2O3-stabilized ZrO2 (Ni-YSZ) anode active layer measured by focused ion beam scanning electron microscopy. Each individual contiguous network of Ni, YSZ, and porosity was identified and labeled according to whether it was contiguous with the rest of the electrode. It was determined that the YSZ phase was 100% connected, whereas at least 86% of the Ni and 96% of the pores were connected. Triple-phase boundary (TPB) segments were identified and evaluated with respect to the contiguity of each of the three phases at their locations. It was found that 11.6% of the TPB length was on one or more isolated phases and hence was not electrochemically active.
Abstract Most current micro/nanoelectromechanical systems (MEMS/NEMS) are based on silicon. Howev... more Abstract Most current micro/nanoelectromechanical systems (MEMS/NEMS) are based on silicon. However, silicon exhibits relatively poor mechanical/tribological properties, compromising applications to some devices. Diamond films with superior mechanical/tribological properties provide an excellent alternative platform material. Ultrananocrystalline diamond (UNCD®) in film form with 2–5 nm grains exhibits excellent properties for high-performance MEMS/NEMS devices. Concurrently, piezoelectric Pb (Zr x Ti 1-x) O 3 (PZT) ...
We performed resistive transport measurements on small, hexagonal-shaped MgB 2 single crystals. W... more We performed resistive transport measurements on small, hexagonal-shaped MgB 2 single crystals. We find that the crystal surfaces contribute significantly to the superconducting properties when aligned with an applied magnetic field H allel c. In the range H< 1.6 H_c2, where H_c2 is the bulk upper critical field as determined from specific heat, the resistivity is non-Ohmic and strongly angular dependent with a sharp dip Delta theta 2^ o. By studying the alignment of H with a selected side surface while varying the ...
We have carried out atom-probe tomography on individual presolar nanodiamonds and a presolar SiC.... more We have carried out atom-probe tomography on individual presolar nanodiamonds and a presolar SiC. Al in the SiC shows a banded structure and may be segregated along planar defects, possibly in solid solution as AlN. Additional data will be presented.
The final transport properties of magnetic tunnel junctions are dictated by their underlying magn... more The final transport properties of magnetic tunnel junctions are dictated by their underlying magnetic domain and microstructure. As such, atomic-level characterizations combined with local, site-specific transport measurements are essential to truly understand their fundamental behavior. In this poster, we present local, nanoscale, site-specific transport measurements of magnetic tunnel junctions with MgO and Al2O3 tunnel barriers and FeCo-based ferromagnetic layers made
Abstract Most current micro/nanoelectromechanical systems (MEMS/NEMS) are based on silicon. Howev... more Abstract Most current micro/nanoelectromechanical systems (MEMS/NEMS) are based on silicon. However, silicon exhibits relatively poor mechanical/tribological properties, compromising applications to some devices. Diamond films with superior mechanical/tribological properties provide an excellent alternative platform material. Ultrananocrystalline diamond (UNCD®) in film form with 2-5 nm grains exhibits excellent mechanical and tribological properties for high-performance MEMS/NEMS devices.
Argonne National Laboratory has established and implemented a coordinated set of characterization... more Argonne National Laboratory has established and implemented a coordinated set of characterization methods for coated-conductor specimens that can be applied in a manner compatible with further processing or utilization of the respective specimen. These characterization methods include measurements of superconductor transport properties, phase composition, microstructure, and epitaxy quality for YBCO-coated conductors that range in size up to multi-meters.
X-ray optics called multilayer Laue lenses (MLLs) provide a promising path to focusing hard X-ray... more X-ray optics called multilayer Laue lenses (MLLs) provide a promising path to focusing hard X-rays with high focusing efficiency at a resolution between 5 nm and 20 nm. MLLs consist of thousands of depth-graded thin layers. The thickness of each layer obeys the linear zone plate law. X-ray beamline tests have been performed on magnetron sputter-deposited WSi2/Si MLLs at the Advanced Photon Source/Center for Nanoscale Materials 26-ID nanoprobe beamline.
Abstract The samples returned to Earth by the NASA's Genesis Mission contain a record of the elem... more Abstract The samples returned to Earth by the NASA's Genesis Mission contain a record of the elemental and isotopic abundances of the Solar Wind (SW). This record is formed by the SW ions implanted in the near-surface regions of the Genesis sample collectors, so that the SW material can be distinguished from a terrestrial contamination, which occurred due to the crash landing of the spacecraft Sample Return Capsule.
Surface plasmon polaritons launched at concentric arcs can be focused into a sub-wavelength wide ... more Surface plasmon polaritons launched at concentric arcs can be focused into a sub-wavelength wide focal spot of high near-field light intensity. When increasing the number of arcs from one to eight the focused intensity increases by a factor of 30. The focused plasmons give raise to enhanced Raman scattering from R6G molecules placed in the focal area. By exploiting the polarization dependence of the focusing we establish an enhancement of the Raman signal by a factor of three.
Abstract Superconducting nanowires are of special interest for studying size effects on the super... more Abstract Superconducting nanowires are of special interest for studying size effects on the superconducting to normal state transition, flux-line dynamics in confined geometries, and quantum phase slips. We report the fabrication and properties of superconducting lead (Pb) nanowires by using the nanopores in anodic aluminum oxide (AAO) membranes as templates. The nanopores were formed through self-assembly during anodization of aluminum foils in an acid.
Extended abstract of a paper presented at Microscopy and Microanalysis 2013 in Indianapolis, Indi... more Extended abstract of a paper presented at Microscopy and Microanalysis 2013 in Indianapolis, Indiana, USA, August 4 – August 8, 2013.
ABSTRACT This shows that plasma FIB prepared specimens can be used for site specific specimen pre... more ABSTRACT This shows that plasma FIB prepared specimens can be used for site specific specimen preparation and increases throughput when combined with ex situ lift out and the EXpressLO method.
Theex situlift out (EXLO) adhesion forces are reviewed and new applications of EXLO for focused i... more Theex situlift out (EXLO) adhesion forces are reviewed and new applications of EXLO for focused ion beam (FIB)-prepared specimens are described. EXLO is used to manipulate electron transparent specimens on microelectromechanical systems carrier devices designed forin situelectron microscope analysis. A new patented grid design without a support film is described for EXLO. This new slotted grid design provides a surface for holding the specimen in place and also allows for post lift out processing. Specimens may be easily manipulated into a backside orientation to reduce FIB curtaining artifacts with this slotted grid. Large EXLO specimens can be manipulated from Xe+plasma FIB prepared specimens. Finally, applications of EXLO and manipulation of FIB specimens using a vacuum probe lift out method are shown. The vacuum probe provides more control for placing specimens on the new slotted grids and also allows for easy manipulation into a backside configuration.
ABSTRACT We present new data from the novel application of atom-probe tomography to the study of ... more ABSTRACT We present new data from the novel application of atom-probe tomography to the study of nanodiamonds from the meteorite Allende. The mean meteoritic ^12C/^13C peak ratio is higher than that of our standards, but there are instrumental artifacts.
A method is described for quantitatively analyzing the level of interconnectivity of solid-oxide ... more A method is described for quantitatively analyzing the level of interconnectivity of solid-oxide fuel cell electrode phases. The method was applied to the three-dimensional microstructure of a Ni-Y2O3-stabilized ZrO2 (Ni-YSZ) anode active layer measured by focused ion beam scanning electron microscopy. Each individual contiguous network of Ni, YSZ, and porosity was identified and labeled according to whether it was contiguous with the rest of the electrode. It was determined that the YSZ phase was 100% connected, whereas at least 86% of the Ni and 96% of the pores were connected. Triple-phase boundary (TPB) segments were identified and evaluated with respect to the contiguity of each of the three phases at their locations. It was found that 11.6% of the TPB length was on one or more isolated phases and hence was not electrochemically active.
Abstract Most current micro/nanoelectromechanical systems (MEMS/NEMS) are based on silicon. Howev... more Abstract Most current micro/nanoelectromechanical systems (MEMS/NEMS) are based on silicon. However, silicon exhibits relatively poor mechanical/tribological properties, compromising applications to some devices. Diamond films with superior mechanical/tribological properties provide an excellent alternative platform material. Ultrananocrystalline diamond (UNCD®) in film form with 2–5 nm grains exhibits excellent properties for high-performance MEMS/NEMS devices. Concurrently, piezoelectric Pb (Zr x Ti 1-x) O 3 (PZT) ...
We performed resistive transport measurements on small, hexagonal-shaped MgB 2 single crystals. W... more We performed resistive transport measurements on small, hexagonal-shaped MgB 2 single crystals. We find that the crystal surfaces contribute significantly to the superconducting properties when aligned with an applied magnetic field H allel c. In the range H< 1.6 H_c2, where H_c2 is the bulk upper critical field as determined from specific heat, the resistivity is non-Ohmic and strongly angular dependent with a sharp dip Delta theta 2^ o. By studying the alignment of H with a selected side surface while varying the ...
We have carried out atom-probe tomography on individual presolar nanodiamonds and a presolar SiC.... more We have carried out atom-probe tomography on individual presolar nanodiamonds and a presolar SiC. Al in the SiC shows a banded structure and may be segregated along planar defects, possibly in solid solution as AlN. Additional data will be presented.
The final transport properties of magnetic tunnel junctions are dictated by their underlying magn... more The final transport properties of magnetic tunnel junctions are dictated by their underlying magnetic domain and microstructure. As such, atomic-level characterizations combined with local, site-specific transport measurements are essential to truly understand their fundamental behavior. In this poster, we present local, nanoscale, site-specific transport measurements of magnetic tunnel junctions with MgO and Al2O3 tunnel barriers and FeCo-based ferromagnetic layers made
Abstract Most current micro/nanoelectromechanical systems (MEMS/NEMS) are based on silicon. Howev... more Abstract Most current micro/nanoelectromechanical systems (MEMS/NEMS) are based on silicon. However, silicon exhibits relatively poor mechanical/tribological properties, compromising applications to some devices. Diamond films with superior mechanical/tribological properties provide an excellent alternative platform material. Ultrananocrystalline diamond (UNCD®) in film form with 2-5 nm grains exhibits excellent mechanical and tribological properties for high-performance MEMS/NEMS devices.
Argonne National Laboratory has established and implemented a coordinated set of characterization... more Argonne National Laboratory has established and implemented a coordinated set of characterization methods for coated-conductor specimens that can be applied in a manner compatible with further processing or utilization of the respective specimen. These characterization methods include measurements of superconductor transport properties, phase composition, microstructure, and epitaxy quality for YBCO-coated conductors that range in size up to multi-meters.
X-ray optics called multilayer Laue lenses (MLLs) provide a promising path to focusing hard X-ray... more X-ray optics called multilayer Laue lenses (MLLs) provide a promising path to focusing hard X-rays with high focusing efficiency at a resolution between 5 nm and 20 nm. MLLs consist of thousands of depth-graded thin layers. The thickness of each layer obeys the linear zone plate law. X-ray beamline tests have been performed on magnetron sputter-deposited WSi2/Si MLLs at the Advanced Photon Source/Center for Nanoscale Materials 26-ID nanoprobe beamline.
Abstract The samples returned to Earth by the NASA's Genesis Mission contain a record of the elem... more Abstract The samples returned to Earth by the NASA's Genesis Mission contain a record of the elemental and isotopic abundances of the Solar Wind (SW). This record is formed by the SW ions implanted in the near-surface regions of the Genesis sample collectors, so that the SW material can be distinguished from a terrestrial contamination, which occurred due to the crash landing of the spacecraft Sample Return Capsule.
Surface plasmon polaritons launched at concentric arcs can be focused into a sub-wavelength wide ... more Surface plasmon polaritons launched at concentric arcs can be focused into a sub-wavelength wide focal spot of high near-field light intensity. When increasing the number of arcs from one to eight the focused intensity increases by a factor of 30. The focused plasmons give raise to enhanced Raman scattering from R6G molecules placed in the focal area. By exploiting the polarization dependence of the focusing we establish an enhancement of the Raman signal by a factor of three.
Abstract Superconducting nanowires are of special interest for studying size effects on the super... more Abstract Superconducting nanowires are of special interest for studying size effects on the superconducting to normal state transition, flux-line dynamics in confined geometries, and quantum phase slips. We report the fabrication and properties of superconducting lead (Pb) nanowires by using the nanopores in anodic aluminum oxide (AAO) membranes as templates. The nanopores were formed through self-assembly during anodization of aluminum foils in an acid.
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