TY - JOUR
T1 - Monitoring Molecular Transport across Colloidal Membranes
AU - Silletta, Emilia V.
AU - Xu, Zhe
AU - Youssef, Mena
AU - Sacanna, Stefano
AU - Jerschow, Alexej
N1 - Funding Information:
The work was supported primarily by the MRSEC Program of the National Science Foundation under Award No. DMR-1420073 and partially by Award No. CHE 1710046. The Zeiss Merlin field emission SEM was acquired through the support of the NSF under Award No. DMR-0923251.
Publisher Copyright:
© 2018 American Chemical Society.
PY - 2018/5/10
Y1 - 2018/5/10
N2 - The controlled shaping and surface functionalization of colloidal particles has provided opportunities for the development of new materials and responsive particles. The possibility of creating hollow particles with semipermeable walls allows modulating molecular transport properties on colloidal length scales. While shapes and sizes can typically be observed by optical means, the underlying chemical and physical properties are often invisible. Here, we present measurements of cross-membrane transport via pulsed field gradient NMR in packings of hollow colloidal particles. The work is conducted using a systematic selection of particle sizes, wall permeabilities, and osmotic pressures and allows tracking organic molecules as well as ions. It is also shown that, while direct transport of molecules can be measured, indirect markers can be obtained for invisible species via the osmotic pressure as well. The cross-membrane transport information is important for applications in nanoconfinement, nanofiltration, nanodelivery, or nanoreactor devices.
AB - The controlled shaping and surface functionalization of colloidal particles has provided opportunities for the development of new materials and responsive particles. The possibility of creating hollow particles with semipermeable walls allows modulating molecular transport properties on colloidal length scales. While shapes and sizes can typically be observed by optical means, the underlying chemical and physical properties are often invisible. Here, we present measurements of cross-membrane transport via pulsed field gradient NMR in packings of hollow colloidal particles. The work is conducted using a systematic selection of particle sizes, wall permeabilities, and osmotic pressures and allows tracking organic molecules as well as ions. It is also shown that, while direct transport of molecules can be measured, indirect markers can be obtained for invisible species via the osmotic pressure as well. The cross-membrane transport information is important for applications in nanoconfinement, nanofiltration, nanodelivery, or nanoreactor devices.
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U2 - 10.1021/acs.jpcb.8b01638
DO - 10.1021/acs.jpcb.8b01638
M3 - Article
C2 - 29665683
AN - SCOPUS:85046459362
VL - 122
SP - 4931
EP - 4936
JO - Journal of Physical Chemistry B
JF - Journal of Physical Chemistry B
SN - 1520-6106
IS - 18
ER -