Synthesis of cadmium sulphide superlattices using self-assembled bacterial-S-layers
Article Abstract:
An important objective in nanotechnology is the synthesis of patterned arrangements of inorganic nanocrystals which have magnetic, electronic or optical properties that could be exploited commercially. Methods to organize crystals into superlattices include monolayer disposition and colloidal crystallization. A new approach to synthesizing cadmium sulphide superlattices using self-assembled, two dimensional bacterial S-layers is presented. The method's potential for surface chemical modification suggests that it could be used for assembling a wide range of ordered nanoparticle arrays.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 1997
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Bacteria and the Midas touch
Article Abstract:
New evidence suggests that Alaska's placer gold deposits may have derived from chemical deposition initiated by the interaction of bacteria and minerals. Placer gold deposits were long thought to be due to the weathering and transport of vein gold from elsewhere, but John Watterson has found that various species of bacteria are capable of leaching out mineral ores including gold, thus allowing the gold to accumulate in deposits. This process of gold biometallization is a prime example of bacterial biomineralization.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 1992
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The negative side of crystal growth
Article Abstract:
Calcium phosphate mineral apatite were found to grow rapidly on a negative pole of ferroelectric crystals which consist of aligned electric dipoles so that overall polarity will not be presented by a normal crystal. The rate of crystal overgrowth on polarized apatite was greater than the non-polarized substrate and this growth was only seen on the negative-pole surface.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 1997
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