3m Innovative Properties Company

The University of Western Ontario

Sabastine C Ezugwu

Giovanni Fanchini

Ranjith Divigalpitiya

Joseph A Paquette

Joe B Gilroy

Disclosed herein are redox-active 6-oxoverdazyl polymers having structures (S1) and (S2) synthesized via ring-opening metathesis polymerization (ROMP) and their solution, bulk, and thin-film properties investigated. Detailed studies of the ROMP method employed confirmed that stable radical polymers with controlled molecular weights and narrow molecular weight distributions (&#xd0;&#x3c;1.2) were produced. Thermal gravimetric analysis of a representative example of the title polymers demonstrated stability up to 190&#xb0; C., while differential scanning calorimetry studies revealed a glass transition temperature of 152&#xb0; C. An ultrathin memristor device was produced using these polymers, namely a 10 nm homogeneous thin film of poly-[1,5-diisopropyl-3-(cis-5-norbornene-exo-2,3-dicarboxiimide)-6-oxoverdazyl] (P6OV), a poly-radical with three tunable charge states per each radical monomer: positive, neutral and negative.

Polymer based memristors

An article includes a substrate having a first major surface and optionally a second major surface. A layering arrangement is disposed on either or both of the first major surface and the second major surface. The layering arrangement includes a carbon layer and a conducting polymer layer.

Growing community of inventors

London, Canada

Sabastine C Ezugwu