title: Porous carbon protected magnetite and silver hybrid nanoparticles: morphological control, recyclable catalysts, and multicolor cell imaging.
abstract: A simple and facile synthetic strategy is developed to prepare a new class of multifunctional hybrid nanoparticles (NPs) that can integrate a magnetic core with silver nanocrystals embedded in porous carbon shell. The method involves a one-step solvothermal synthesis of Fe3O4@C template NPs with Fe3O4nanocrystals in the core protected by a porous carbon shell, followed by loading and in situ reduction of silver ions in the carbon shell in water at room temperature. The core-satellite and dumbbell-like nanostructures of the resulted Fe3O4@C-Ag hybrid NPs can be readily controlled by loading amount of silver ions. The hybrid NPs can efficiently catalyze the reduction reaction of organic dyes in water. The easy magnetic separation and high stability of the catalytically active silver nanocrystals embedded in the carbon shell enable the hybrid NPs to be recycled for reuse as catalysts. The hybrid NPs can also overcome cellular barriers to enter the intracellular region and light up the mouse melanoma B16F10 cells in multicolor modal, with no cytotoxicity. Such porous carbon protected Fe3O4@C-Ag hybrid NPs with controllable nanostructures and a combination of magnetic and noble metallic components have great potential for a broad range of applications in the catalytic industry and biomedical field.
authors.affiliation: Department of Chemistry of The College of Staten Island and The Graduate Center, The City University of New York , Staten Island, New York 10314, United States.
authors.forename: Hui
authors.initials: H
authors.lastname: Wang
authors.forename: Jing
authors.initials: J
authors.lastname: Shen
authors.forename: Yingyu
authors.initials: Y
authors.lastname: Li
authors.forename: Zengyan
authors.initials: Z
authors.lastname: Wei
authors.forename: Guixin
authors.initials: G
authors.lastname: Cao
authors.forename: Zheng
authors.initials: Z
authors.lastname: Gai
authors.forename: Kunlun
authors.initials: K
authors.lastname: Hong
authors.forename: Probal
authors.initials: P
authors.lastname: Banerjee
authors.forename: Shuiqin
authors.initials: S
authors.lastname: Zhou
mesh_terms: D000818:Animals; D002244:Carbon / Q000737:chemistry; D002384:Catalysis; D058948:Cell Tracking; D058185:Magnetite Nanoparticles; D008546:Melanoma, Experimental / Q000175:diagnosis / Q000473:pathology*; D051379:Mice; D058608:Nanopores; D012834:Silver / Q000737:chemistry
chemical_list: D058185:Magnetite Nanoparticles; D012834:Silver; D002244:Carbon