In-Situ/Liquid Time-of-Flight Secondary Ion Mass Spectrometry (TOF-SIMS) for Environmental Interfaces
EMSL Project ID
36601
Abstract
Chemistry of liquid interfaces is extremely important in environmental and industrial processes but is poorly understood. Liquid layers coat nearly all real-world systems from the oceans to atmospheric particles, and include surface "brines" that coat rocks and soils, and ice, selective membranes for energy storage and production, important industrial catalysts, and even us. New tools are needed to study these inherently inhomogeneous systems, under realistic conditions of humidity and in the presence of trace and reactive gases. We propose an In-Situ/Liquids Time-of-Flight Secondary Ion Mass Spectrometer (ISL-TOFSIMS) system, that will for the first time allow a comprehensive molecular-specific understanding of chemistry at liquid and liquid/solid interfaces. Major recent developments in TOFSIMS (cluster beams) and novel micro-scale chemistry methods make this revolutionary advance possible and timely. The proposed system can measure molecular and ion concentrations, microsecond reaction kinetics with high spatial resolution (120 nm laterally, 1 nm vertically) and 3D mapping capability, and has a unique "in operation" sensitivity calibration. These features will enable exploring pressing issues in interface-specific photochemistry, surface segregation and transport at liquid, brine, ice and mineral surfaces, and transport across aqueous-based membranes and adherent films, all under relevant gaseous conditions.
Project Details
Project type
Exploratory Research
Start Date
2009-10-01
End Date
2010-10-03
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
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, XY Yu, Z Zhu, S Thevuthasan, and JP Cowin. 2011. "Making a Hybrid Microfluidic Platform Compatible for In Situ Imaging by Vacuum-Based Techniques." Journal of Vacuum Science and Technology A--Vacuum, Surfaces and Films 29(6):Article No. 061101. doi:10.1116/1.3654147
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
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.