caa a22 4500 463228235 CHVBK 20180405153233.0 cr unu---uuuuu 170326e20070901xx s 000 0 eng 10.1007/s10853-007-1597-7 doi (NATIONALLICENCE)springer-10.1007/s10853-007-1597-7 A simple synthesis of amine-derivatised superparamagnetic iron oxide nanoparticles for bioapplications [Elektronische Daten] [Sasmita Mohapatra, Nabakumar Pramanik, Samrat Mukherjee, Sudip Ghosh, Panchanan Pramanik] Adsorption of 3-aminopropyltriethoxysilane (APTS) on magnetite nanoparticles during its formation has been investigated to optimise the preparation of stable aqueous dispersion of amine derivatised magnetite nanoparticles. APTS adsorbs chemically on the surface of magnetite particle modifying its surface which is evident from thermal and C, H, N analysis. The variation of particle size has been observed with change of APTS concentration. X-ray diffractogram shows the formation of pure inverse spinel phase magnetite with average crystallite size 7nm when equimolar (Fe3O4: APTS=1:1) quantity of APTS was used during its synthesis. The presence of free surface -NH2 groups and Fe-O-Si bonds was observed by FTIR. Raman spectrum further confirms the presence of surface -NH2 groups. Transmission electron microscopy shows formation of particles of average size between 7nm and 12nm. The effective hydrodynamic diameter of the APTS coated particle agglomerates is 45.8nm in stable aqueous colloidal dispersion, which is evident from photon correlation spectroscopy. VSM measurements at room temperature of both silanised and unsilanised magnetite shows their superparamagnetic nature with saturation magnetisation 41e.m.u/g and 56e.m.u/g, respectively. Avidin has been immobilised on the surface through glutaraldehyde, which demonstrates the possibility of the synthesised material to be used in protein immobilisation to form bioactive magnetic particles. Springer Science+Business Media, LLC, 2007 Mohapatra Sasmita Department of Chemistry, Indian Institute of Technology, Kharagpur, West Bengal, India aut Pramanik Nabakumar Department of Chemistry, Indian Institute of Technology, Kharagpur, West Bengal, India aut Mukherjee Samrat UGC-DAE Consortium for Scientific Research, 700091, Kolkata, India aut Ghosh Sudip Department of Biotechnology, Indian Institute of Technology, 721302, Kharagpur, West Bengal, India aut Pramanik Panchanan Department of Chemistry, Indian Institute of Technology, Kharagpur, West Bengal, India aut Journal of Materials Science Kluwer Academic Publishers-Plenum Publishers; http://www.springer-ny.com 42/17(2007-09-01), 7566-7574 0022-2461 42:17<7566 2007 42 10853 https://doi.org/10.1007/s10853-007-1597-7 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10853-007-1597-7 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Mohapatra Sasmita Department of Chemistry, Indian Institute of Technology, Kharagpur, West Bengal, India aut NATIONALLICENCE 700 1- Pramanik Nabakumar Department of Chemistry, Indian Institute of Technology, Kharagpur, West Bengal, India aut NATIONALLICENCE 700 1- Mukherjee Samrat UGC-DAE Consortium for Scientific Research, 700091, Kolkata, India aut NATIONALLICENCE 700 1- Ghosh Sudip Department of Biotechnology, Indian Institute of Technology, 721302, Kharagpur, West Bengal, India aut NATIONALLICENCE 700 1- Pramanik Panchanan Department of Chemistry, Indian Institute of Technology, Kharagpur, West Bengal, India aut NATIONALLICENCE 773 0- Journal of Materials Science Kluwer Academic Publishers-Plenum Publishers; http://www.springer-ny.com 42/17(2007-09-01), 7566-7574 0022-2461 42:17<7566 2007 42 10853 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer