TY - JOUR

T1 - Influence of shape and surface properties of microstructured reaction areas on the deposition of silica

AU - Helmecke, Olaf

AU - Menneking, Christin

AU - Behrens, Peter

AU - Menzel, Henning

N1 - Funding information: The authors would like to thank Prof. A. Waag and M. Karsten (Institute of Semiconductor Technology, Braunschweig University of Technology) for the preparation of the mask and A. Scherbarth for SEM measurements. This work was supported in the scope of the Priority Research Program 1117 “Principles of Biomineralization” by the Deutsche Forschungsgemeinschaft (DFG).

PY - 2008/1/10

Y1 - 2008/1/10

N2 - Differently shaped reaction areas for silica deposition were created by photochemical grafting of hydrophobic poly(acrylic acid 2-ethyl-hexylester) as barrier and a hydrophilic polymer employing a mask having hexagons, pentagons, squares and stripes. Poly(ethylene glycol), poly(acrylic acid), branched and linear poly(ethylene imine) and linear poly(methylpropylene imine) have been applied as hydrophilic polymer in the reaction area. These patterned films have been used in silica mineralization experiments by dipping them into a silica precursor solution. Investigations of the polymer films and silica depositions have been done by contact angle measurements, ellipsometry and scanning electron microscopy (SEM). Silica deposition occurs only in the hydrophilically coated areas, resulting in regular arrays of lens-like silica particles. There are only minor differences due to the shape of the reaction area. The influence of the different hydrophilic polymers can be explained by their wetting behaviour.

AB - Differently shaped reaction areas for silica deposition were created by photochemical grafting of hydrophobic poly(acrylic acid 2-ethyl-hexylester) as barrier and a hydrophilic polymer employing a mask having hexagons, pentagons, squares and stripes. Poly(ethylene glycol), poly(acrylic acid), branched and linear poly(ethylene imine) and linear poly(methylpropylene imine) have been applied as hydrophilic polymer in the reaction area. These patterned films have been used in silica mineralization experiments by dipping them into a silica precursor solution. Investigations of the polymer films and silica depositions have been done by contact angle measurements, ellipsometry and scanning electron microscopy (SEM). Silica deposition occurs only in the hydrophilically coated areas, resulting in regular arrays of lens-like silica particles. There are only minor differences due to the shape of the reaction area. The influence of the different hydrophilic polymers can be explained by their wetting behaviour.

KW - Hydrophilic areas

KW - Photochemical grafting

KW - Silica deposition

KW - Surface patterning

UR - http://www.scopus.com/inward/record.url?scp=40449128245&partnerID=8YFLogxK

U2 - 10.1007/s00396-007-1743-4

DO - 10.1007/s00396-007-1743-4

M3 - Article

AN - SCOPUS:40449128245

VL - 286

SP - 305

EP - 311

JO - Colloid and polymer science

JF - Colloid and polymer science

SN - 0303-402X

IS - 3

ER -