Chengqun Qin

Area of research

Materials Chemistry · Electrical and Electronic Engineering

Research interest

Research topics from publications: Hydrothermal preparation of fluorinated graphene hydrogel for high-performance supercapacitors; A sulfonimide-based alternating copolymer as a single-ion polymer electrolyte for high-performance lithium-ion batteries; Solid-State Fluorescence of Fluorine-Modified Carbon Nanodots Aggregates Triggered by Poly(ethylene glycol); Surface passivation of carbon dots with ethylene glycol and their high-sensitivity to Fe3+; Controlling Heat Release from a Close‐Packed Bisazobenzene–Reduced‐Graphene‐Oxide Assembly Film for High‐Energy Solid‐State Photothermal Fuels; Tetracarboxylated Azobenzene/Polymer Supramolecular Assemblies as High-Performance Multiresponsive Actuators. Representative work: A novel sulfonimide-based single-ion conductor with an alternating structure as a polymer electrolyte for high-performance lithium-ion batteries Solid-state fluorescent carbon quantum dots (QDs) can be used for the encryption of security information. Controlling the dispersion and aggregation of the QDs is crucial for switching their solid-state fluorescence "on" and "off." The use of polymers has been proposed to slightly separate the QDs inside aggregates to trigger their fluorescence. However, the complex interactions between the QDs and flexible polymer chains make this process challenging. Here, fluorine-modified carbon nanodots (FCDs) were used in a solution as the printing ink. After printing, the FCDs were aggregated on paper via hydrogen bonds, thereby quenching the fluorescence. After a poly(ethylene glycol) (PEG) treatment