Zobrazeno 1 - 10
of 34
pro vyhledávání: '"Scott A. Ecelberger"'
Publikováno v:
2016 IEEE Aerospace Conference.
Tandem mass spectrometry (MS/MS) is a powerful and widely-used technique for identifying the molecular structure of organic constituents of a complex sample. Application of MS/MS to the study of unknown planetary samples on a remote space mission wou
Autor:
Nancy J. Chanover, Timothy J. Cornish, Stephanie Getty, Andrej Grubisic, Kyle Uckert, Xiang Li, William B. Brinckerhoff, Scott A. Ecelberger
Publikováno v:
2015 IEEE Aerospace Conference.
Laser desorption/ionization time-of-flight mass spectrometry (LD-TOF-MS) has been developed and used to characterize different groups of hydrous minerals. We have advanced the technique by including reversed polarity, precision ion gating, and a curv
Autor:
Qinghao Wu, Stephanie Getty, Richard N. Zare, Timothy J. Cornish, Scott A. Ecelberger, Jamie E. Elsila, Xiang Li, William B. Brinckerhoff
Publikováno v:
2014 IEEE Aerospace Conference.
Two-step laser desorption mass spectrometry is a well suited technique to the analysis of high priority classes of organics, such as polycyclic aromatic hydrocarbons, present in complex samples. The use of decoupled desorption and ionization laser pu
Autor:
Xiang Li, Arriana Chavez, Nancy J. Chanover, Melissa Floyd, Nancy J. McMillan, Kyle Uckert, Timothy J. Cornish, David A. Glenar, Rula Tawalbehy, Scott A. Ecelberger, William B. Brinckerhoff, Penelope J. Boston, Stephanie Getty, David G. Voelz, Xifeng Xiao
Publikováno v:
2014 IEEE Aerospace Conference.
We demonstrate the biosignature detection capabilities of several classes of instruments, including a compact laser desorption/ionization time-of-flight mass spectrometer, an acousto-optic tunable filter IR point spectrometer, a laser-induced breakdo
Publikováno v:
Rapid Communications in Mass Spectrometry. 14:2408-2411
An innovative design for a miniature time-of-flight mass spectrometer has been developed employing several newly designed components. These include: (1) a gridless, focusing ion source allowing for the use of very high extraction energies in a mainte
Publikováno v:
Diamond and Related Materials. 4:1289-1295
The heteroepitaxial growth of diamond films on (001) silicon by bias-enhanced, microwave-assisted chemical vapor deposition leads to a mosaic of highly oriented crystallites. The majority of crystallites adopt a “cube-on-cube” orientation (diamon
Autor:
David G. Voelz, Xifeng Xiao, Kyle Uckert, Nancy J. Chanover, Paul R. Mahaffy, Timothy J. Cornish, Scott A. Ecelberger, Stephanie Getty, Penelope J. Boston, R. Tawalbeh, William B. Brinckerhoff, David A. Glenar
Publikováno v:
2012 IEEE Aerospace Conference.
We discuss the development of a miniature near-infrared point spectrometer, operating between 1.7–3.45 μm, based on acousto-optic tunable filter (AOTF) technology. This instrument may be used to screen and corroborate analyses of samples containin
Publikováno v:
Thin Solid Films. 247:258-263
The effects of He/N 2 reactive gas composition on the structural and electrical properties of InN thin films deposited by magnetron sputtering on A1N-nucleated (00.1) sapphire substrates have been investigated. X-ray scattering studies demonstrate th
Publikováno v:
Journal of Applied Physics. 74:1684-1691
An extensive investigation of InN overlayers on AlN‐buffered (00.1) sapphire by reactive magnetron sputtering has been undertaken and the dependencies of several basic materials properties (film thickness, development and quality of heteroepitaxy,
Publikováno v:
Journal of Materials Research. 5:2677-2681
Single-phase aluminum nitride films were deposited onto fused quartz and single-crystal sapphire by current-controlled, reactive, de magnetron sputtering from an aluminum metal target. Optical and structural properties were observed to correlate syst