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Manganese‐Doped Zinc Orthosilicate‐Bearing Phosphor Microparticles with Controlled Three‐Dimensional Shapes Derived from Diatom Frustules
Author(s) -
Cai Ye,
Dickerson Matthew B.,
Haluska Michael S.,
Kang Zhitao,
Summers Christopher J.,
Sandhage Kenneth H.
Publication year - 2007
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1551-2916.2007.01612.x
Subject(s) - orthosilicate , tetraethyl orthosilicate , zinc , phosphor , frustule , nanoparticle , manganese , materials science , diatom , chemical engineering , doping , nanotechnology , metallurgy , geology , optoelectronics , engineering , oceanography
Mn‐doped zinc orthosilicate (Zn 2 SiO 4 )‐bearing phosphor microparticles were synthesized with controlled three‐dimensional (3‐D) morphologies inherited from the microshells (frustules) of diatoms (unicellular algae). Silica‐based diatom frustules were first coated with manganese and zinc oxide nanoparticles by exposure to an acetate precursor solution and then firing at 700°C. Subsequent reaction of the nanoparticles with the underlying silica at 1050°C yielded compact, continuous, and conformal Mn‐doped Zn 2 SiO 4 coatings on the frustule surfaces. The converted 3‐D microparticles exhibited bright green emission upon stimulation with 275‐nm light. Photoluminescent microparticles with a wide variety of well‐controlled 3‐D morphologies can be mass produced with this simple, low‐cost bioclastic process.