Document Detail

Concentration Dependence on the Shape and Size of Sol-Gel Derived Yttria-Stabilized Zirconia Ceramic Features by Soft Lithographic Patterning.
MedLine Citation:
PMID:  23030350     Owner:  NLM     Status:  Publisher    
Surface areas of typically 5x5 mm2 were patterned with high aspect ratio micron- and submicron-sized structures of yttria-stabilized zirconia using a combination of micromolding in capillaries and sol-gel chemistry. The influence of precursor solution concentration and mold geometry on the final shape and dimensions of the patterned structures was investigated. At a precursor concentration [Zr] = 0.724 mol/dm3, isolated objects - due to controlled cracking of patterned films - such as crosses (height 1.4 µm; width 6.0 µm) and "dog-bones" (height 800-900 nm; width 900 nm) or patterned films (height 450 nm) were obtained, depending on the mold geometry. Lower precursor concentrations led to differently sized and shaped structures, with changes in dimensions of more than an order of magnitude. Employing a precursor concentration [Zr] = 0.036 mol/dm3 yielded isolated rings (height 100-150 nm; line width 20 nm) and squares (height 40 nm; line width 40 nm). A better understanding of the relationship between precursor concentration, mold geometry and the observed coherent crack patterns in as-dried sol-gel structures may lead to new techniques to pattern isolated features.
Sjoerd A Veldhuis; Antony George; Maarten Nijland; Johan E Ten Elshof
Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2012-10-3
Journal Detail:
Title:  Langmuir : the ACS journal of surfaces and colloids     Volume:  -     ISSN:  1520-5827     ISO Abbreviation:  Langmuir     Publication Date:  2012 Oct 
Date Detail:
Created Date:  2012-10-3     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9882736     Medline TA:  Langmuir     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
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