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Using Self-assembly and Selective Chemical Vapor Deposition for Precise Positioning of Individual Germanium Nanoparticles on Hafnia

Published online by Cambridge University Press:  01 February 2011

Shawn S Coffee ,
Wyatt A Winkenwerder ,
Scott K Stanley ,
Shahrjerdi Davood ,
Sanjay K Banerjee  and
John G Ekerdt
Shawn S Coffee
Affiliation:
coffee@che.utexas.edu, University of Texas at Austin, Chemical Engineering, 1 University Station C0400, Austin, TX, 78712, United States
Wyatt A Winkenwerder
Affiliation:
ww5106@mail.utexas.edu, University of Texas at Austin, Chemical Engineering, 1 University Station C0400, Austin, TX, 78712, United States
Scott K Stanley
Affiliation:
stanley@che.utexas.edu, University of Texas at Austin, Chemical Engineering, 1 University Station C0400, Austin, TX, 78712, United States
Shahrjerdi Davood
Affiliation:
davood@mail.utexas.edu, University of Texas at Austin, Electrical and Computer Engineering, 1 University Station C0803, Austin, TX, 78712, United States
Sanjay K Banerjee
Affiliation:
banerjee@ece.utexas.edu, University of Texas at Austin, Electrical and Computer Engineering, 1 University Station C0803, Austin, TX, 78712, United States
John G Ekerdt
Affiliation:
ekerdt@che.utexas.edu, University of Texas at Austin, Chemical Engineering, 1 University Station C0400, Austin, TX, 78712, United States
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Abstract

Germanium nanoparticle nucleation was studied in organized arrays on HfO2 using a SiO2 thin film mask with ~20-24 nm pores and a 6×1010 cm-2 pore density. Poly(styrene-b-methyl methacrylate) diblock copolymer was employed to pattern the SiO2 film. Hot wire chemical vapor deposition produced Ge nanoparticles using 4-19 monolayer Ge exposures. By seeding adatoms on HfO2 at room temperature before growth and varying growth temperatures between 725-800 K, nanoparticle size was demonstrated to be limited by Ge etching of SiO2 pore walls.

Keywords

nanostructurechemical vapor deposition (CVD) (deposition)Ge
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 921: Symposium T – Nanomanufacturing , 2006 , 0921-T07-09
Copyright
Copyright © Materials Research Society 2006

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