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Carbon-13 Labeling for Quantitative Analysis of Molecular Movement in Heterogeneous Organic
 

Summary: Carbon-13 Labeling for Quantitative Analysis of
Molecular Movement in Heterogeneous Organic
Materials Using Secondary Ion Mass Spectrometry
Shane E. Harton,*,, Zhengmao Zhu,,| Frederick A. Stevie, Yoko Aoyama,,# and Harald Ade&
Department of Materials Science & Engineering, Analytical Instrumentation Facility, Department of Chemistry, and
Department of Physics, North Carolina State University, Raleigh, North Carolina 27695
Secondary ion mass spectrometry (SIMS) is used to probe
the movement of macromolecules in heterogeneous or-
ganic systems. Using 13C tracer labeling and two model
systems, polystyrene/poly(2-vinylpyridine) (PS/P2VP)
and polystyrene/poly(4-bromostyrene) (PS/P4BrS), the
diffusion of 13C-labeled PS has been investigated near the
respective heterogeneous interfaces using a CAMECA-
IMS-6F magnetic sector mass spectrometer. 13C labeling
has been shown to greatly minimize matrix effects (i.e.,
changes in secondary ion yields due to changing chemical
environment) in heterogeneous systems. P2VP is a ni-
trogen-rich polymer (C7H7N monomer composition), mak-
ing it an excellent model polymer for exploration of this
technique for potential future use in biological applica-

  

Source: Ade, Harald W.- Department of Physics, North Carolina State University

 

Collections: Physics