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Title: Engineering catalytic activity via ion beam bombardment of catalyst supports for vertically aligned carbon nanotube growth

Carbon nanotube growth depends on the catalytic activity of metal nanoparticles on alumina or silica supports. The control on catalytic activity is generally achieved by variations in water concentration, carbon feed, and sample placement on a few types of alumina or silica catalyst supports obtained via thin film deposition. We have recently expanded the choice of catalyst supports by engineering inactive substrates like c-cut sapphire via ion beam bombardment. The deterministic control on the structure and chemistry of catalyst supports obtained by tuning the degree of beam-induced damage have enabled better regulation of the activity of Fe catalysts only in the ion beam bombarded areas and hence enabled controllable super growth of carbon nanotubes. A wide range of surface characterization techniques were used to monitor the catalytically active surface engineered via ion beam bombardment. The proposed method offers a versatile way to control carbon nanotube growth in patterned areas and also enhances the current understanding of the growth process. As a result, with the right choice of water concentration, carbon feed and sample placement, engineered catalyst supports may extend the carbon nanotube growth yield to a level that is even higher than the ones reported here, and thus offers promisingmore » applications of carbon nanotubes in electronics, heat exchanger, and energy storage.« less
Authors:
 [1] ;  [2] ;  [2] ;  [3] ;  [4] ;  [3] ;  [3] ;  [5] ;  [6] ;  [7] ;  [7]
  1. Air Force Research Lab., Wright-Patterson Air Force Base, OH (United States); National Research Council, Washington, D.C. (United States)
  2. Brookhaven National Lab. (BNL), Upton, NY (United States)
  3. Air Force Research Lab., Wright-Patterson Air Force Base, OH (United States); UES, Inc., Dayton, OH (United States)
  4. Kansas State Univ., Manhattan, KS (United States)
  5. Air Force Research Lab., Wright-Patterson Air Force Base, OH (United States); UES, Inc., Dayton, OH (United States); Wright State Univ., Dayton, OH (United States)
  6. Southwestern Ohio Council for Higher Education, Dayton, OH (United States)
  7. Air Force Research Lab., Wright-Patterson Air Force Base, OH (United States)
Publication Date:
OSTI Identifier:
1237189
Report Number(s):
BNL--111767-2016-JA
Journal ID: ISSN 0277-786X; R&D Project: 16060/16060; KC0403020
Grant/Contract Number:
SC00112704
Type:
Accepted Manuscript
Journal Name:
Proceedings of SPIE - The International Society for Optical Engineering
Additional Journal Information:
Journal Volume: 9552; Conference: Carbon Nanotubes, Graphene, and Emerging 2D Materials for Electronic and Photonic Devices VIII, San Diego, CA (United States), 9 Aug 2015; Journal ID: ISSN 0277-786X
Publisher:
SPIE
Research Org:
Brookhaven National Laboratory (BNL), Upton, NY (United States)
Sponsoring Org:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
Country of Publication:
United States
Language:
English
Subject:
77 NANOSCIENCE AND NANOTECHNOLOGY carbon nanotubes; engineering; ion beams; silica; carbon; water; thin film deposition; metals; nanoparticles; sapphire; catalytic activity; catalyst support; ion beam bombardment