In Situ Synthesis and Characterization of Poly(aryleneethynylene)‐Grafted Reduced Graphene Oxide |
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| Authors: | Sai Sun Dr Xiaodong Zhuang Prof?Dr Bo Liu Luxing Wang Linfeng Gu Prof?Dr Sannian Song Prof?Dr Bin Zhang Prof?Dr Yu Chen |
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| Institution: | 1. Key Lab for Advanced Materials, Institute of Applied Chemistry, East China University of Science and Technology, Shanghai, P. R. China;2. College of Chemistry and Chemical Engineering, Shanghai Jiaotong University, Shanghai, P. R. China;3. State Key Laboratory of Functional Materials for Informatics, Shanghai Institute of Micro-system and Information Technology, CAS, Shanghai, P. R. China |
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| Abstract: | Using highly soluble bromo‐functionalized reduced graphene oxide (RGBr) as a key graphene template for surface‐directing Sonogashira–Hagihara polymerization, a novel soluble poly(arylene‐ethynylene)‐grafted reduced graphene oxide, hereafter abbreviated as PAE‐g‐RGO, was prepared in situ. The entirely different electron distribution of LUMO and HOMO of PAE‐g‐RGO suggested the existence of a charge‐transfer (CT) state (PAE.?–RGO.+). The negative ΔGCS value (?2.57 eV) indicates that the occurrence of the charge separation via 1RGO* in o‐DCB is exothermic and favorable. Upon irradiation with 365 nm light, the light‐induced electron paramagnetic resonance (LEPR) spectrum of PAE‐g‐RGO showed a decrease in the spin‐state density owing to photoinduced intramolecular electron transfer events in this system. A sandwich‐type Al/PAE‐g‐RGO/ITO device showed representative bistable electrical switching behavior. The nonvolatile memory performance was attributed to the CT‐induced conductance changes, which was supported by molecular computation results and conductive atomic force microscopy (C‐AFM) images. |
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| Keywords: | covalent modification in situ polymerization poly(aryleneethynylene) reduced graphene oxide structural characterization |
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