In-Situ/Liquid Time-of-Flight Secondary Ion Mass Spectrometry (TOF-SIMS) for Environmental Interfaces
EMSL Project ID
42330
Abstract
This is a continuation of EMSL project number 36601. A versatile and self-contained interface for high-vapor pressure liquid surfaces, including aqueous interfaces has been built that permits the exploration of the surfaces of these liquids with several vacuum-based analytical instruments. It uses microfluidics to flow the liquid under study past a 3-micron diameter window. This window supports the liquid against the vacuum by the liquids surface tension, while keeping the high-density region traversed by the probe beams to only a few microns. This also limits temperature and concentration changes due to evaporation of the solvent. The beam damage caused by the probe beams is largely negligible, as the flowing liquid surface self-renews. We will in this year extend the method, apply it to new systems and instruments, and publish results.
Project Details
Project type
Exploratory Research
Start Date
2010-12-02
End Date
2011-12-04
Status
Closed
Released Data Link
Team
Principal Investigator
Team Members
Related Publications
Hua X, MJ Marshall, Y Xiong, X Ma, Y Zhou, AE Tucker, Z Zhu, S Liu, and XY Yu. 2015. "Two-dimensional and three-dimensional dynamic imaging of live biofilms in a microchannel by time-of-flight secondary ion mass spectrometry." Biomicrofluidics 9(3):Article No. 031101. doi:10.1063/1.4919807
Hua X, XY Yu, Z Wang, L Yang, B Liu, Z Zhu, AE Tucker, WB Chrisler, EA Hill, S Thevuthasan, Y Lin, S Liu, and MJ Marshall. 2014. "In situ molecular imaging of hydrated biofilm in a microfluidic reactor by ToF-SIMS." Analyst 139:1609-1613. doi:10.1039/C3AN02262E
Liu B, XY Yu, Z Zhu, X Hua, L Yang, and Z Wang. 2014. "In situ chemical probing of the electrode-electrolyte interface by ToF-SIMS." Lab on a Chip 14:855-859. doi:10.1039/C3LC50971K
Yang L, XY Yu, Z Zhu, MJ Iedema, and JP Cowin. 2011. "Probing Liquid Surfaces under Vacuum Using SEM and TOF-SIMS." Lab on a Chip 11(15):2481-2484. doi:10.1039/C0LC00676A
Yang L, Z Zhu, XY Yu, G Rodek, LV Saraf, S Thevuthasan, and JP Cowin. 2014. "In situ SEM and ToF-SIMS analysis of IgG conjugated gold nanoparticles at aqueous surfaces." Surface and Interface Analysis 46(4):224-228. doi:10.1002/sia.5252
Yang L, Z Zhu, XY Yu, S Thevuthasan, and JP Cowin. 2013. "Performance of a Microfluidic Device for In Situ ToF-SIMS Analysis of Selected Organic Molecules at Aqueous Surfaces." Analytical Methods 5(10):2515-2522. doi:10.1039/c3ay26513g
Yu XY, L Yang, Z Zhu, JP Cowin, and MJ Iedema. 2011. "Probing Aqueous Surfaces by ToF-SIMS." LCGC North America (Oct 2011/Supplement S):34-38.