TY - JOUR

T1 - Influence of polymeric additives on biomimetic silica deposition on patterned microstructures

AU - Helmecke, Olaf

AU - Hirsch, Alexander

AU - Behrens, Peter

AU - Menzel, Henning

N1 - Funding information: The authors thank Professor A. Waag and M. Karsten (Institute of Semiconductor Technology, Braunschweig University of Technology) for the preparation of the mask, F. Cornelius (Institute of Technical Chemistry, Braunschweig University of Technology) for the polymers provided, and C. Menneking (Institute of Inorganic Chemistry, Leibniz University of Hannover) and A. Scherbarth (Institute of Technical Chemistry, Braunschweig University of Technology) for the SEM measurements. This work was supported in the scope of Priority Research Program 1117, “Principles of Biomineralization,” by the Deutsche Forschungsgemeinschaft (DFG).

PY - 2008/3/4

Y1 - 2008/3/4

N2 - Microstructured polymer films prepared by photochemical grafting of different polymers were used as restricted reaction areas in silica deposition experiments. Linear and branched poly(alkyleneimines) and poly(allylamine hydrochloride) in pure aqueous or phosphate-containing solutions were used as additives to silica precursor solutions. The silica deposits obtained by spin-coating these solutions onto microstructured polymer films were investigated by scanning electron microscopy and atomic force microscopy. Experiments with poly(alkylene imines) in the silica precursor solution show the deposition of smooth and granular silica structures that closely mimic the natural patterns. The structure formation can be explained by physicochemical processes. Hypotheses that have been made for the natural silification processes can be evaluated on this basis.

AB - Microstructured polymer films prepared by photochemical grafting of different polymers were used as restricted reaction areas in silica deposition experiments. Linear and branched poly(alkyleneimines) and poly(allylamine hydrochloride) in pure aqueous or phosphate-containing solutions were used as additives to silica precursor solutions. The silica deposits obtained by spin-coating these solutions onto microstructured polymer films were investigated by scanning electron microscopy and atomic force microscopy. Experiments with poly(alkylene imines) in the silica precursor solution show the deposition of smooth and granular silica structures that closely mimic the natural patterns. The structure formation can be explained by physicochemical processes. Hypotheses that have been made for the natural silification processes can be evaluated on this basis.

KW - Diatoms

KW - Photochemical grafting

KW - Polyamines

KW - Silica deposition

KW - Surface patterning

UR - http://www.scopus.com/inward/record.url?scp=40949162768&partnerID=8YFLogxK

U2 - 10.1016/j.jcis.2008.01.006

DO - 10.1016/j.jcis.2008.01.006

M3 - Article

C2 - 18304567

AN - SCOPUS:40949162768

VL - 321

SP - 44

EP - 51

JO - Journal of Colloid and Interface Science

JF - Journal of Colloid and Interface Science

SN - 0021-9797

IS - 1

ER -