Nanoscale two-dimensional(2D)organic materials have attracted significant interest on account of their unique properties,which result from their ultrathin and flat morphology.Supramolecular 2D nanomaterials prepared b...Nanoscale two-dimensional(2D)organic materials have attracted significant interest on account of their unique properties,which result from their ultrathin and flat morphology.Supramolecular 2D nanomaterials prepared by bottom-up approaches have great potential in the creation of nanoscale devices with various applications,each controlled by the properties of its single-molecular components.Here,we report a uniform and controllable 2D rhombic micelles formed by block copolymers(BCPs)with poly(p-phenylenevinylene)(PPV)as core blocks.The supramolecular 2D nanostructures created in this way and driven byπ-πinteractions realize the precise separation of the semiconducting and insulating constituents of the constructed BCPs.With a vertical tunneling device design,the 2D rhombic micelles exhibited an on-off current ratio of>10^(4)and a high on-state current density of 6000 A cm^(−2)as the insulating layer was compressed by a conductive atomic force microscopy(C-AFM)probe.The tunneling device also shows a reproducible sensitivity on a flexible substrate,opening up potential flexible pressure sensor applications for such novel supramolecular 2D nanostructures.展开更多
基金This studywas supported financially by the National Natural Science Foundation of China(nos.21975115,21733005,and 11674150)the Shenzhen Fundamental Research Programs(nos.JCYJ20180302180238419,JCYJ20190809161413310,and KQJSCX20180319114442157)+4 种基金the Shenzhen Nobel Prize Scientists Laboratory Project(no.C17213101)the Guangdong Provincial Key Laboratory of Catalysis(no.2020B121201002)the Key-Area Research and Development Program of Guangdong Province(no.2019B010931001)the Guangdong Innovative and Entrepreneurial Research Team Program(under contract nos.2016ZT06G587 and 2016ZT06D348)the“Shenzhen Sci-Tech Fund”(no.KYTDPT20181011104007).
文摘Nanoscale two-dimensional(2D)organic materials have attracted significant interest on account of their unique properties,which result from their ultrathin and flat morphology.Supramolecular 2D nanomaterials prepared by bottom-up approaches have great potential in the creation of nanoscale devices with various applications,each controlled by the properties of its single-molecular components.Here,we report a uniform and controllable 2D rhombic micelles formed by block copolymers(BCPs)with poly(p-phenylenevinylene)(PPV)as core blocks.The supramolecular 2D nanostructures created in this way and driven byπ-πinteractions realize the precise separation of the semiconducting and insulating constituents of the constructed BCPs.With a vertical tunneling device design,the 2D rhombic micelles exhibited an on-off current ratio of>10^(4)and a high on-state current density of 6000 A cm^(−2)as the insulating layer was compressed by a conductive atomic force microscopy(C-AFM)probe.The tunneling device also shows a reproducible sensitivity on a flexible substrate,opening up potential flexible pressure sensor applications for such novel supramolecular 2D nanostructures.
