title: Preparation and unique electrical behaviors of monodispersed hybrid nanorattles of metal nanocores with hairy electroactive polymer shells.
abstract: A versatile template-assisted strategy for the preparation of monodispersed rattle-type hybrid nanospheres, encapsulating a movable Au nanocore in the hollow cavity of a hairy electroactive polymer shell (Au@air@PTEMA-g-P3HT hybrid nanorattles; PTEMA: poly(2-(thiophen-3-yl)ethyl methacrylate; P3HT: poly(3-hexylthiophene), was reported. The Au@silica core-shell nanoparticles, prepared by the modified Stöber sol-gel process on Au nanoparticle seeds, were used as templates for the synthesis of Au@silica@PTEMA core-double shell nanospheres. Subsequent oxidative graft polymerization of 3-hexylthiophene from the exterior surface of the Au@silica@PTEMA core-double shell nanospheres allowed the tailoring of surface functionality with electroactive P3HT brushes (Au@silica@PTEMA-g-P3HT nanospheres). The Au@air@ PTEMA-g-P3HT hybrid nanorattles were obtained after etching of the silica interlayer by HF. The as-prepared nanorattles were dispersed into an electrically insulating polystyrene matrix and for the first time used to fabricate nonvolatile memory devices. As a result, unique electrical behaviors, including insulator behavior, write-once-read-many-times and rewritable memory effects, and conductor behavior as well, were observed in the Al/Au@air@PTEMA-g-P3HT+PS/ITO (ITO: indium-tin oxide) sandwich thin-film devices.
authors: Key Lab for Adv. Mater. Institute of Applied Chemistry, East China University of Science and Technology, 130 Meilong Road, Shanghai 200237 (China); Department of Chemical & Biomolecular Engineering, National University of Singapore, 10 Kent Ridge, 119260 (Singapore).
authors: Tao
authors: T
authors: Cai
authors: Bin
authors: B
authors: Zhang
authors: Yu
authors: Y
authors: Chen
authors: Cheng
authors: C
authors: Wang
authors: Chun Xiang
authors: CX
authors: Zhu
authors: Koon-Gee
authors: KG
authors: Neoh
authors: En-Tang
authors: ET
authors: Kang
mesh_terms: D004560:Electricity; D053768:Metal Nanoparticles / Q000737:chemistry*; D008689:Methacrylates / Q000737:chemistry*; D054118:Nanospheres / Q000737:chemistry*; D049329:Nanostructures / Q000737:chemistry*; D058105:Polymerization; D011108:Polymers / Q000737:chemistry*; D013876:Thiophenes / Q000737:chemistry*
chemical_list: D008689:Methacrylates; D011108:Polymers; D013876:Thiophenes; C507295:poly(3-hexylthiophene)
keywords: electrical behaviors; hairy hybrid nanorattle; memory devices; oxidative graft polymerization; poly(3-hexylthiophene)