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Title: Helium Ion Microscopy for Imaging and Quantifying Porosity at the Nanoscale

Abstract

Nanoporous materials are essential components in a vast number of applications from energy to drug delivery and to agriculture. Yet, the number of ways to analytically quantify the salient features of these materials, for example: surface structure, pore shape, and size, remain limited. The most common approach is gas absorption, where volumetric gas absorption and desorption are measured. This technique has some fundamental drawbacks such as low sample throughput and a lack of direct surface visualization. In this work, we demonstrate Helium Ion Microscopy (HIM) as a tool for imaging and quantification of pores in industrially relevant SiO 2 catalyst supports. We start with the fundamental principles of ion-sample interaction, and build on this knowledge to experimentally observe and quantify surface pores by using the HIM and image data analytics. We contrast our experimental results to gas absorption and demonstrate full statistical agreement between two techniques. The principles surrounding the theoretical, experimental, and analytical framework presented herein offer an automated framework for visualization and quantification of pore structures in a wide variety of materials.

Authors:
ORCiD logo [1]; ORCiD logo [1];  [2];  [1];  [3]; ORCiD logo [4]; ORCiD logo [4]
  1. Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
  2. Univ. of Tennessee, Knoxville, TN (United States)
  3. Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States); Univ. of Tennessee, Knoxville, TN (United States)
  4. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22). Scientific User Facilities Division
OSTI Identifier:
1515675
Grant/Contract Number:  
AC05-00OR22725
Resource Type:
Accepted Manuscript
Journal Name:
Analytical Chemistry
Additional Journal Information:
Journal Volume: 90; Journal Issue: 2; Journal ID: ISSN 0003-2700
Publisher:
American Chemical Society (ACS)
Country of Publication:
United States
Language:
English

Citation Formats

Burch, Matthew J., Ievlev, Anton V., Mahady, Kyle, Hysmith, Holland, Rack, Philip D., Belianinov, Alex, and Ovchinnikova, Olga S. Helium Ion Microscopy for Imaging and Quantifying Porosity at the Nanoscale. United States: N. p., 2017. Web. doi:10.1021/acs.analchem.7b04418.
Burch, Matthew J., Ievlev, Anton V., Mahady, Kyle, Hysmith, Holland, Rack, Philip D., Belianinov, Alex, & Ovchinnikova, Olga S. Helium Ion Microscopy for Imaging and Quantifying Porosity at the Nanoscale. United States. doi:10.1021/acs.analchem.7b04418.
Burch, Matthew J., Ievlev, Anton V., Mahady, Kyle, Hysmith, Holland, Rack, Philip D., Belianinov, Alex, and Ovchinnikova, Olga S. Mon . "Helium Ion Microscopy for Imaging and Quantifying Porosity at the Nanoscale". United States. doi:10.1021/acs.analchem.7b04418. https://www.osti.gov/servlets/purl/1515675.
@article{osti_1515675,
title = {Helium Ion Microscopy for Imaging and Quantifying Porosity at the Nanoscale},
author = {Burch, Matthew J. and Ievlev, Anton V. and Mahady, Kyle and Hysmith, Holland and Rack, Philip D. and Belianinov, Alex and Ovchinnikova, Olga S.},
abstractNote = {Nanoporous materials are essential components in a vast number of applications from energy to drug delivery and to agriculture. Yet, the number of ways to analytically quantify the salient features of these materials, for example: surface structure, pore shape, and size, remain limited. The most common approach is gas absorption, where volumetric gas absorption and desorption are measured. This technique has some fundamental drawbacks such as low sample throughput and a lack of direct surface visualization. In this work, we demonstrate Helium Ion Microscopy (HIM) as a tool for imaging and quantification of pores in industrially relevant SiO2 catalyst supports. We start with the fundamental principles of ion-sample interaction, and build on this knowledge to experimentally observe and quantify surface pores by using the HIM and image data analytics. We contrast our experimental results to gas absorption and demonstrate full statistical agreement between two techniques. The principles surrounding the theoretical, experimental, and analytical framework presented herein offer an automated framework for visualization and quantification of pore structures in a wide variety of materials.},
doi = {10.1021/acs.analchem.7b04418},
journal = {Analytical Chemistry},
number = 2,
volume = 90,
place = {United States},
year = {2017},
month = {12}
}

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