title: Leptothrix sp. sheaths modified with iron oxide particles: Magnetically responsive, high aspect ratio functional material.
abstract: Smart materials of biological origin are attracting a lot of attention nowadays, especially as catalysts, carriers or adsorbents. Among them, magnetically modified biomaterials are especially important due to their response to external magnetic field. This report demonstrates that naturally occurring micrometer sized, high aspect ratio material (native and autoclaved Leptothrix sp. sheaths) efficiently bind synthetically prepared magnetite and maghemite nanoparticles and their aggregates. Magnetic modification of Leptothrix sheaths enables to prepare a promising material for advanced biotechnology and environmental technology applications. The prepared magnetically responsive sheaths were tested as inexpensive adsorbent for crystal violet removal from aqueous solutions. The observed maximum adsorption capacity was 243.1mg of dye per 1g of adsorbent.
authors.affiliation: Department of Nanobiotechnology, Biology Centre, ISB, CAS, Na Sadkach 7, 370 05 Ceske Budejovice, Czech Republic; Global Change Research Institute, CAS, Na Sadkach 7, 370 05 Ceske Budejovice, Czech Republic; Regional Centre of Advanced Technologies and Materials, Palacky University, Slechtitelu 27, 783 71 Olomouc, Czech Republic. Electronic address: ivosaf@yahoo.com.
authors.forename: Ivo
authors.initials: I
authors.lastname: Safarik
authors.affiliation: Department of Nanobiotechnology, Biology Centre, ISB, CAS, Na Sadkach 7, 370 05 Ceske Budejovice, Czech Republic; Department of General and Industrial Microbiology, Faculty of Biology, Sofia University "St. Kliment Ohridski", 8 Dragan Tsankov Blvd., 1164 Sofia, Bulgaria; Laboratory Microwave Magnetics, Institute of Electronics, Bulgarian Academy of Sciences, 72 Tzarigradsko Chaussee Blvd., 1784 Sofia, Bulgaria.
authors.forename: Ralitsa
authors.initials: R
authors.lastname: Angelova
authors.affiliation: Global Change Research Institute, CAS, Na Sadkach 7, 370 05 Ceske Budejovice, Czech Republic; Department of Applied Chemistry, Faculty of Agriculture, University of South Bohemia, Branisovska 1457, 370 05 Ceske Budejovice, Czech Republic.
authors.forename: Eva
authors.initials: E
authors.lastname: Baldikova
authors.affiliation: Regional Centre of Advanced Technologies and Materials, Palacky University, Slechtitelu 27, 783 71 Olomouc, Czech Republic.
authors.forename: Kristyna
authors.initials: K
authors.lastname: Pospiskova
authors.affiliation: Department of Nanobiotechnology, Biology Centre, ISB, CAS, Na Sadkach 7, 370 05 Ceske Budejovice, Czech Republic; Global Change Research Institute, CAS, Na Sadkach 7, 370 05 Ceske Budejovice, Czech Republic.
authors.forename: Mirka
authors.initials: M
authors.lastname: Safarikova
mesh_terms: D005840:Gentian Violet / Q000737:chemistry*; D042743:Leptothrix / Q000737:chemistry*; D058185:Magnetite Nanoparticles / Q000737:chemistry*
chemical_list: D058185:Magnetite Nanoparticles; D005840:Gentian Violet
keywords: High aspect ratio material; Iron oxide; Leptothrix; Magnetic modification