@article { ISI:000242519200007,
	title = {Optically transparent magnetic nanocomposites based on encapsulated Fe3O4 nanoparticles in a sol-gel silica network},
	journal = {Nanotechnology},
	volume = {17},
	number = {22},
	year = {2006},
	month = {NOV},
	pages = {5565-5572},
	publisher = {IOP PUBLISHING LTD},
	type = {Article},
	address = {DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND},
	abstract = {<p>Composite Fe3O4-SiO2 materials were prepared by the sol-gel method with tetraethoxysilane and aqueous-based Fe3O4 ferrofluids as precursors. The monoliths obtained were crack free and showed both optical and magnetic properties. The structural properties were determined by infrared spectroscopy, x-ray diffractometry and transmission electron microscopy. Fe3O4 particles of 20 nm size lie within the pores of the matrix without any strong Si-O-Fe bonding. The well established silica network provides effective confinement to these nanoparticles. The composites were transparent in the 600-800 nm regime and the field dependent magnetization curves suggest that the composite exhibits superparamagnetic characteristics.</p>},
	issn = {0957-4484},
	doi = {10.1088/0957-4484/17/22/007},
	author = {Thomas, Senoy and Sakthikumar, D. and Joy, Pattayil Alias and Yoshida, Yasuhiko and Anantharaman, Maliemadom R.}
}
