Abstract
Silicification at neutral pH and under ambient conditions is of growing interest due to its close relationship with biosilicification. In diatoms biosilicification has been reported to occur at ( or close to) neutral pH and it has been shown that protein molecules act as catalysts / templates / scaffolds for this elegant materials chemistry. In this investigation various catalysts / templates have been studied for their role in silicification in vitro. We have used functionalized C-60 fullerene, R5 (an important polypeptide from the amino acid sequence of a silaffin protein), poly-l-lysine (PLL) and two poly(allylamine hydrochloride) (PAH) samples having different molecular weights. An aqueous silica precursor was used and ordered silica structures were produced in each of the systems studied. The sizes of the silica structures appear to correlate with the size, in solution, of the templating / scaffolding agents. Biological systems exhibit hierarchical structures with remarkable control of morphologies over different length scales. The use of templating / scaffolding agents having different sizes and shapes is one possible paradigm for the production of such structures in vivo.
| Language | English |
|---|---|
| Pages | 109-116 |
| Number of pages | 8 |
| Journal | Journal of Inorganic and Organometallic Polymers |
| Volume | 12 |
| Issue number | 3-4 |
| DOIs | |
| Publication status | Published - Dec 2002 |
Fingerprint
Keywords
- silica
- sol-gel
- silicification
- biosilicification
- functionalized C-60 fullerene
- silaffin
- R5 polypeptide
- poly-l-lysine
- biosilica
- poly(allylamine hydrochloride)
- peptides
- protein
Cite this
}
Silicification and biosilicification - Part 4. Effect of template size on the formation of silica. / Patwardhan, S V ; Clarson, S J .
In: Journal of Inorganic and Organometallic Polymers , Vol. 12, No. 3-4, 12.2002, p. 109-116.Research output: Contribution to journal › Article
TY - JOUR
T1 - Silicification and biosilicification - Part 4. Effect of template size on the formation of silica
AU - Patwardhan, S V
AU - Clarson, S J
PY - 2002/12
Y1 - 2002/12
N2 - Silicification at neutral pH and under ambient conditions is of growing interest due to its close relationship with biosilicification. In diatoms biosilicification has been reported to occur at ( or close to) neutral pH and it has been shown that protein molecules act as catalysts / templates / scaffolds for this elegant materials chemistry. In this investigation various catalysts / templates have been studied for their role in silicification in vitro. We have used functionalized C-60 fullerene, R5 (an important polypeptide from the amino acid sequence of a silaffin protein), poly-l-lysine (PLL) and two poly(allylamine hydrochloride) (PAH) samples having different molecular weights. An aqueous silica precursor was used and ordered silica structures were produced in each of the systems studied. The sizes of the silica structures appear to correlate with the size, in solution, of the templating / scaffolding agents. Biological systems exhibit hierarchical structures with remarkable control of morphologies over different length scales. The use of templating / scaffolding agents having different sizes and shapes is one possible paradigm for the production of such structures in vivo.
AB - Silicification at neutral pH and under ambient conditions is of growing interest due to its close relationship with biosilicification. In diatoms biosilicification has been reported to occur at ( or close to) neutral pH and it has been shown that protein molecules act as catalysts / templates / scaffolds for this elegant materials chemistry. In this investigation various catalysts / templates have been studied for their role in silicification in vitro. We have used functionalized C-60 fullerene, R5 (an important polypeptide from the amino acid sequence of a silaffin protein), poly-l-lysine (PLL) and two poly(allylamine hydrochloride) (PAH) samples having different molecular weights. An aqueous silica precursor was used and ordered silica structures were produced in each of the systems studied. The sizes of the silica structures appear to correlate with the size, in solution, of the templating / scaffolding agents. Biological systems exhibit hierarchical structures with remarkable control of morphologies over different length scales. The use of templating / scaffolding agents having different sizes and shapes is one possible paradigm for the production of such structures in vivo.
KW - silica
KW - sol-gel
KW - silicification
KW - biosilicification
KW - functionalized C-60 fullerene
KW - silaffin
KW - R5 polypeptide
KW - poly-l-lysine
KW - biosilica
KW - poly(allylamine hydrochloride)
KW - peptides
KW - protein
U2 - 10.1023/A:1021257713504
DO - 10.1023/A:1021257713504
M3 - Article
VL - 12
SP - 109
EP - 116
JO - Journal of Inorganic and Organometallic Polymers
T2 - Journal of Inorganic and Organometallic Polymers
JF - Journal of Inorganic and Organometallic Polymers
SN - 1053-0495
IS - 3-4
ER -