Document Detail

Programmable growth of branched silicon nanowires using a focused ion beam.
MedLine Citation:
PMID:  20698589     Owner:  NLM     Status:  PubMed-not-MEDLINE    
Although significant progress has been made in being able to spatially define the position of material layers in vapor-liquid-solid (VLS) grown nanowires, less work has been carried out in deterministically defining the positions of nanowire branching points to facilitate more complicated structures beyond simple 1D wires. Work to date has focused on the growth of randomly branched nanowire structures. Here we develop a means for programmably designating nanowire branching points by means of focused ion beam-defined VLS catalytic points. This technique is repeatable without losing fidelity allowing multiple rounds of branching point definition followed by branch growth resulting in complex structures. The single crystal nature of this approach allows us to describe resulting structures with linear combinations of base vectors in three-dimensional (3D) space. Finally, by etching the resulting 3D defined wire structures branched nanotubes were fabricated with interconnected nanochannels inside. We believe that the techniques developed here should comprise a useful tool for extending linear VLS nanowire growth to generalized 3D wire structures.
Kimin Jun; Joseph M Jacobson
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Nano letters     Volume:  10     ISSN:  1530-6992     ISO Abbreviation:  Nano Lett.     Publication Date:  2010 Aug 
Date Detail:
Created Date:  2010-08-11     Completed Date:  2010-11-22     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  101088070     Medline TA:  Nano Lett     Country:  United States    
Other Details:
Languages:  eng     Pagination:  2777-82     Citation Subset:  -    
Department of Mechanical Engineering, The Center for Bits and Atoms, Media Laboratory, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA.
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