NDLI: Titanium uptake and incorporation into silica nanostructures by the diatom Pinnularia sp. (Bacillariophyceae)

Content Provider	Springer Nature Link
Author	Chauton, Matilde Skogen Skolem, Lotte M. B. Olsen, Lasse Mork Vullum, Per Erik Walmsley, John Vadstein, Olav
Copyright Year	2014
Abstract	Diatoms are an ecologically successful group within the phytoplankton, and their special feature is a biofabricated silica cell encasement called a frustule. These frustules attract interest in material technology, and one potential application is to use them in solar cell technology. The silica frustule with its nanoscaled pattern is interesting per se, but the utility is enhanced if we succeed in incorporating other elements. Titanium is an interesting element because its oxide is a semi-conductor with a high band gap. However, doping with relevant elements through bioincorporation is challenging, and it is necessary to understand the biology involved in element uptake and incorporation. Here we present data on bioincorporation of Ti into the silica frustules of the pennate diatom Pinnularia sp. (Ehrenberg) and show that the distribution of the incorporated Ti is inhomogeneous both between and within valves. More than a tenfold increase of Ti in newly synthesised valves was achieved, and increased Ti around the pores was confirmed by both EDS and EELS analyses. HAADF STEM spectroscopy revealed a grainy surface with amorphous silica particles of 4 to 5 nm in size. These observations are explained by what is known from the physico-chemical processes involved in biosilification and frustule formation, looking into it from a biological point of view.
Starting Page	777
Ending Page	786
Page Count	10
File Format	PDF
ISSN	09218971
Journal	Journal of Applied Phycology
Volume Number	27
Issue Number	2
e-ISSN	15735176
Language	English
Publisher	Springer Netherlands
Publisher Date	2014-07-24
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Silica Titanium Diatom Bioincorporation Frustulem Nanostrucuture Plant Sciences Freshwater & Marine Ecology Plant Physiology Ecology
Content Type	Text
Resource Type	Article
Subject	Plant Science Aquatic Science

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Titanium uptake and incorporation into silica nanostructures by the diatom Pinnularia sp. (Bacillariophyceae)

Titanium uptake and incorporation into silica nanostructures by the diatom Pinnularia sp. (Bacillariophyceae)

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