title: Defect induced photoluminescence and ferromagnetic properties of bio-compatible SWCNT/Ni hybrid bundles.
abstract: Designing of bio-compatible nanomagnets with multiple functionalities receives immense scientific attention due to their potential applications in bio-labeling, medical diagnosis and treatment. Here we report the synthesis of Nickel (Ni) incorporated single-walled carbon nanotube (SWCNT) hybrid and bio-compatible bundles having interesting magnetic and photoluminescence (PL) properties. The SWCNT exhibits a high-crystallinity and it has an average diameter of ∼1.7 nm. Ni particles of 10-20 nm were incorporated within the SWCNT bundles. These hybrid bundles exhibit PL and it is attributed to the presence of delocalized π electrons and their recombination at the defective sites of SWCNT. Magnetic characterization revealed that the SWCNT/Ni hybrid bundle possesses a high (50 Oe) coercivity compared to bulk Ni and a long range ferromagnetic ordering at room temperature. MTT-assay has been conducted to study the cytotoxicity of these hybrid nanostructures.
authors.affiliation: National Physical Laboratory, Council of Scientific and Industrial Research, Dr. K.S. Krishnan Road, New Delhi 110 012, India.
authors.forename: Vinay
authors.initials: V
authors.lastname: Gupta
authors.forename: Bipin Kumar
authors.initials: BK
authors.lastname: Gupta
authors.forename: R K
authors.initials: RK
authors.lastname: Kotnala
authors.forename: T N
authors.initials: TN
authors.lastname: Narayanan
authors.forename: Vaneet
authors.initials: V
authors.lastname: Grover
authors.forename: Jyoti
authors.initials: J
authors.lastname: Shah
authors.forename: Vikash
authors.initials: V
authors.lastname: Agrawal
authors.forename: Suresh
authors.initials: S
authors.lastname: Chand
authors.forename: Virendra
authors.initials: V
authors.lastname: Shanker
mesh_terms: D000818:Animals; D001672:Biocompatible Materials; D002477:Cells / Q000187:drug effects; D006801:Humans; D049449:Luminescence; D059346:Magnets; D037742:Nanotubes, Carbon / Q000737:chemistry* / Q000633:toxicity; D009532:Nickel / Q000737:chemistry*
chemical_list: D001672:Biocompatible Materials; D037742:Nanotubes, Carbon; D009532:Nickel