title: Water-dispersible, multifunctional, magnetic, luminescent silica-encapsulated composite nanotubes.
abstract: A multifunctional one-dimensional nanostructure incorporating both CdSe quantum dots (QDs) and Fe(3)O(4) nanoparticles (NPs) within a SiO(2)-nanotube matrix is successfully synthesized based on the self-assembly of preformed functional NPs, allowing for control over the size and amount of NPs contained within the composite nanostructures. This specific nanostructure is distinctive because both the favorable photoluminescent and magnetic properties of QD and NP building blocks are incorporated and retained within the final silica-based composite, thus rendering it susceptible to both magnetic guidance and optical tracking. Moreover, the resulting hydrophilic nanocomposites are found to easily enter into the interiors of HeLa cells without damage, thereby highlighting their capability not only as fluorescent probes but also as possible drug-delivery vehicles of interest in nanobiotechnology.
authors.affiliation: Department of Chemistry, State University of New York at Stony Brook, Stony Brook, NY 11794, USA.
authors.forename: Hongjun
authors.initials: H
authors.lastname: Zhou
authors.forename: Jingyi
authors.initials: J
authors.lastname: Chen
authors.forename: Eli
authors.initials: E
authors.lastname: Sutter
authors.forename: Mikhail
authors.initials: M
authors.lastname: Feygenson
authors.forename: M C
authors.initials: MC
authors.lastname: Aronson
authors.forename: Stanislaus S
authors.initials: SS
authors.lastname: Wong
mesh_terms: D006367:HeLa Cells; D006801:Humans; D049449:Luminescence; D008280:Magnetics; D018613:Microscopy, Confocal; D053761:Nanocomposites / Q000737:chemistry* / Q000648:ultrastructure; D043942:Nanotubes / Q000737:chemistry* / Q000648:ultrastructure; D045663:Quantum Dots; D012822:Silicon Dioxide / Q000737:chemistry*; D013696:Temperature; D014867:Water / Q000737:chemistry*; D014961:X-Ray Diffraction
chemical_list: D014867:Water; D012822:Silicon Dioxide