Silicification and biosilicification - Part 4. Effect of template size on the formation of silica

S V Patwardhan, S J Clarson

Research output: Contribution to journalArticle

29 Citations (Scopus)

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.

LanguageEnglish
Pages109-116
Number of pages8
JournalJournal of Inorganic and Organometallic Polymers
Volume12
Issue number3-4
DOIs
Publication statusPublished - Dec 2002

Fingerprint

Silicon Dioxide
Silica
Proteins
Catalysts
Polypeptides
Biological systems
Scaffolds (biology)
Fullerenes
Polycyclic aromatic hydrocarbons
Scaffolds
Lysine
Amino acids
Molecular weight
Amino Acids
Peptides
Molecules
polyallylamine
fullerene C60

Keywords

  • silica
  • sol-gel
  • silicification
  • biosilicification
  • functionalized C-60 fullerene
  • silaffin
  • R5 polypeptide
  • poly-l-lysine
  • biosilica
  • poly(allylamine hydrochloride)
  • peptides
  • protein

Cite this

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title = "Silicification and biosilicification - Part 4. Effect of template size on the formation of silica",
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.",
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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 journalArticle

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