title: All-polymeric control of nanoferronics.
abstract: In the search for light and flexible nanoferronics, significant research effort is geared toward discovering the coexisting magnetic and electric orders in crystalline charge-transfer complexes. We report the first example of multiferroicity in centimeter-sized crystalline polymeric charge-transfer superstructures that grow at the liquid-air interface and are controlled by the regioregularity of the polymeric chain. The charge order-driven ferroic mechanism reveals spontaneous and hysteretic polarization and magnetization at the donor-acceptor interface. The charge transfer and ordering in the ferroic assemblies depend critically on the self-organizing and molecular packing of electron donors and acceptors. The invention described here not only represents a new coupling mechanism of magnetic and electric ordering but also creates a new class of emerging all-organic nanoferronics.
authors.affiliation: Department of Mechanical Engineering and Temple Materials Institute, Temple University, Philadelphia, PA 19122, USA.
authors.forename: Beibei
authors.initials: B
authors.lastname: Xu
authors.affiliation: Department of Materials Science and Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139, USA.
authors.forename: Huashan
authors.initials: H
authors.lastname: Li
authors.affiliation: U.S. Army Research Laboratory, Aberdeen Proving Ground, Aberdeen, MD 21005, USA.
authors.forename: Asha
authors.identifier: 0000-0002-2121-2999
authors.initials: A
authors.lastname: Hall
authors.affiliation: School of Materials Science and Engineering, Nanjing University of Science and Technology, 210094 Nanjing, China.
authors.forename: Wenxiu
authors.initials: W
authors.lastname: Gao
authors.affiliation: Department of Mechanical Engineering and Temple Materials Institute, Temple University, Philadelphia, PA 19122, USA.
authors.forename: Maogang
authors.initials: M
authors.lastname: Gong
authors.affiliation: School of Materials Science and Engineering, Nanjing University of Science and Technology, 210094 Nanjing, China.
authors.forename: Guoliang
authors.initials: G
authors.lastname: Yuan
authors.affiliation: Department of Materials Science and Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139, USA.
authors.forename: Jeffrey
authors.initials: J
authors.lastname: Grossman
authors.affiliation: Department of Mechanical Engineering and Temple Materials Institute, Temple University, Philadelphia, PA 19122, USA.
authors.forename: Shenqiang
authors.initials: S
authors.lastname: Ren
keywords: Self-assembly; and charge transfer; crystalline structures; magnetoelectrics
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