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Title: Retention in porous layer pillar array planar separation platforms

Here, this work presents the retention capabilities and surface area enhancement of highly ordered, high-aspect-ratio, open-platform, two-dimensional (2D) pillar arrays when coated with a thin layer of porous silicon oxide (PSO). Photolithographically prepared pillar arrays were coated with 50–250 nm of PSO via plasma-enhanced chemical vapor deposition and then functionalized with either octadecyltrichlorosilane or n-butyldimethylchlorosilane. Theoretical calculations indicate that a 50 nm layer of PSO increases the surface area of a pillar nearly 120-fold. Retention capabilities were tested by observing capillary-action-driven development under various conditions, as well as by running one-dimensional separations on varying thicknesses of PSO. Increasing the thickness of PSO on an array clearly resulted in greater retention of the analyte(s) in question in both experiments. In culmination, a two-dimensional separation of fluorescently derivatized amines was performed to further demonstrate the capabilities of these fabricated platforms.
Authors:
 [1] ;  [2] ;  [2] ;  [1]
  1. Univ. of Tennessee, Knoxville, TN (United States)
  2. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Publication Date:
Grant/Contract Number:
AC05-00OR22725
Type:
Accepted Manuscript
Journal Name:
Analytical Chemistry
Additional Journal Information:
Journal Volume: 88; Journal Issue: 17; Journal ID: ISSN 0003-2700
Publisher:
American Chemical Society (ACS)
Research Org:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States). Center for Nanophase Materials Sciences (CNMS)
Sponsoring Org:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
OSTI Identifier:
1324194

Lincoln, Danielle R., Lavrik, Nickolay V., Kravchenko, Ivan I., and Sepaniak, Michael J.. Retention in porous layer pillar array planar separation platforms. United States: N. p., Web. doi:10.1021/acs.analchem.6b02079.
Lincoln, Danielle R., Lavrik, Nickolay V., Kravchenko, Ivan I., & Sepaniak, Michael J.. Retention in porous layer pillar array planar separation platforms. United States. doi:10.1021/acs.analchem.6b02079.
Lincoln, Danielle R., Lavrik, Nickolay V., Kravchenko, Ivan I., and Sepaniak, Michael J.. 2016. "Retention in porous layer pillar array planar separation platforms". United States. doi:10.1021/acs.analchem.6b02079. https://www.osti.gov/servlets/purl/1324194.
@article{osti_1324194,
title = {Retention in porous layer pillar array planar separation platforms},
author = {Lincoln, Danielle R. and Lavrik, Nickolay V. and Kravchenko, Ivan I. and Sepaniak, Michael J.},
abstractNote = {Here, this work presents the retention capabilities and surface area enhancement of highly ordered, high-aspect-ratio, open-platform, two-dimensional (2D) pillar arrays when coated with a thin layer of porous silicon oxide (PSO). Photolithographically prepared pillar arrays were coated with 50–250 nm of PSO via plasma-enhanced chemical vapor deposition and then functionalized with either octadecyltrichlorosilane or n-butyldimethylchlorosilane. Theoretical calculations indicate that a 50 nm layer of PSO increases the surface area of a pillar nearly 120-fold. Retention capabilities were tested by observing capillary-action-driven development under various conditions, as well as by running one-dimensional separations on varying thicknesses of PSO. Increasing the thickness of PSO on an array clearly resulted in greater retention of the analyte(s) in question in both experiments. In culmination, a two-dimensional separation of fluorescently derivatized amines was performed to further demonstrate the capabilities of these fabricated platforms.},
doi = {10.1021/acs.analchem.6b02079},
journal = {Analytical Chemistry},
number = 17,
volume = 88,
place = {United States},
year = {2016},
month = {8}
}