A5065244047- Conducting polymers and applications
- Organic Electronics and Photovoltaics
- Advanced Sensor and Energy Harvesting Materials
- Polymer crystallization and properties
- Material Dynamics and Properties
- Advancements in Battery Materials
- Supercapacitor Materials and Fabrication
- Electrospun Nanofibers in Biomedical Applications
- Advanced Battery Materials and Technologies
- Machine Learning in Materials Science
- Polymer composites and self-healing
- biodegradable polymer synthesis and properties
- Advanced materials and composites
- Material Properties and Processing
- Force Microscopy Techniques and Applications
- Advanced Thermoelectric Materials and Devices
- Advanced Polymer Synthesis and Characterization
- Molten salt chemistry and electrochemical processes
- nanoparticles nucleation surface interactions
- Surface Modification and Superhydrophobicity
- Nanomaterials and Printing Technologies
- Inorganic Chemistry and Materials
- Electrohydrodynamics and Fluid Dynamics
- Membrane Separation Technologies
- Plant-Derived Bioactive Compounds
Nanjing University
2016-2025
Beijing Institute of Technology
2024
Nanjing University of Science and Technology
2023-2024
University of Chicago
2021-2023
Peking University
1989-2023
Peking University Shenzhen Hospital
2020
Guangdong Institute of New Materials
2020
Shanghai Jiao Tong University
2007
Soft and conformable wearable electronics require stretchable semiconductors, but existing ones typically sacrifice charge transport mobility to achieve stretchability. We explore a concept based on the nanoconfinement of polymers substantially improve stretchability polymer without affecting mobility. The increased chain dynamics under significantly reduces modulus conjugated largely delays onset crack formation strain. As result, our fabricated semiconducting film can be stretched up 100%...
Abstract Molecular additives are often used to enhance dynamic motion of polymeric chains, which subsequently alter the functional and physical properties polymers. However, controlling chain dynamics semiconducting polymer thin films understanding fundamental mechanisms such changes is a new area research. Here, cycloparaphenylenes (CPPs) as conjugated molecular tune behaviors diketopyrrolopyrrole‐based (DPP‐based) It observed that addition CPPs results in significant improvement...
Abstract Organic semiconducting donor–acceptor polymers are promising candidates for stretchable electronics owing to their mechanical compliance. However, the effect of electron‐donating thiophene group on thermomechanical properties conjugated has not been carefully studied. Here, thin‐film investigated diketopyrrolopyrrole (DPP)‐based with varying numbers isolated moieties and sizes fused rings in polymer backbone. Interestingly, it is found that these units act as an antiplasticizer,...
Abstract Mechanical failure of π‐conjugated polymer thin films is unavoidable under cyclic loading conditions, due to intrinsic defects and poor resistance crack propagation. Here, the first tear‐resistant room‐temperature self‐healable semiconducting composite presented, consisting conjugated polymers butyl rubber elastomers. This new displays both a record‐low elastic modulus (<1 MPa) ultrahigh deformability with fracture strain above 800%. More importantly, behavior not sensitive...
Abstract The understanding of the structure‐mechanical property relationship for semiconducting polymers is essential application flexible organic electronics. Herein pseudo free‐standing tensile testing, a technique that measures mechanical thin films floating on surface water, used to obtain stress–strain behaviors two polymers, poly(3‐hexylthiophene) (P3HT) and poly(2,5‐bis(2‐decyltetradecyl)‐3,6‐di(thiophen‐2‐yl)diketopyrrolo[3,4‐c]pyrrole‐1,4‐dione‐ alt ‐thienovinylthiophene (DPP‐TVT)...
In order to apply polymer semiconductors stretchable electronics, they need be easily deformed under strain without being damaged. A small number of conjugated polymers, typically with semicrystalline packing structures, have been reported exhibit mechanical stretchability. Herein, a method is modify semiconductor packing-structure using molecular additive, dioctyl phthalate (DOP), which found act as spacer, inserted between the amorphous chain networks and disrupt crystalline packing. As...
Diketopyrrolopyrrole (DPP)-based donor–acceptor conjugated polymers, with increasing amount of weak H-bonding units, namely 2,6-pyridinedicarboxamide (PDCA), inserted as end groups in alkyl side chains were prepared and investigated. In contrast to previously reported DPP polymers containing PDCA units conjugation breakers along the polymer backbone, readily produced almost quantitative formation intermolecular even at low unit content (<10 mol %) shown by Fourier transform infrared...
Abstract Numerous strategies are developed to impart stretchability polymer semiconductors. Although these methods improve the ductility, mobility, and stability of such stretchable semiconductors, they nonetheless still need further improvement. Here, it is shown that 2,3,5,6‐tetrafluoro‐7,7,8,8‐tetracyanoquinodimethane (F4‐TCNQ) an effective molecular additive tune properties a diketopyrrolopyrrole‐based (DPP‐based) semiconductor. Specifically, addition F4‐TCNQ observed ductility...
Abstract Semiconducting donor–acceptor (D–A) polymers have attracted considerable attention toward the application of organic electronic and optoelectronic devices. However, a rational design rule for making semiconducting with desired thermal mechanical properties is currently lacking, which greatly limits development new advanced applications. Here, polydiketopyrrolopyrrole (PDPP)‐based D–A varied alkyl side‐chain lengths backbone moieties are systematically designed, followed by...
Effects of three nucleating agents concluding talc, sodium benzoate (SB) and an ionomer (Ion., Na + ) on crystallization poly(ethylene terephthalate) (PET) were studied by differential scanning calorimetry (DSC) polarized optical microscope (POM), the parameters kinetics obtained through Avrami Ozawa equations.The fold surface free energy σe pure PET PET/nucleating agent blends was calculated Hoffman-Lauritzen theory.The results indicate that kinds increase rate constant promoting their...
Abstract The backbone of diketopyrrolopyrrole‐thiophene‐vinylene‐thiophene‐based polymer semiconductors (PSCs) is modified with pyridine (Py) or bipyridine ligands to complex Fe(II) metal centers, allowing the metal–ligand complexes act as mechanophores and dynamically crosslink chains. Mono‐ bi‐dentate are observed exhibit different degrees bond strengths, which subsequently affect mechanical properties these Wolf‐type‐II metallopolymers. counter ion also plays a crucial role, it that Py‐Fe...
Precise control over crystallinity and morphology of conjugated polymers (CPs) is essential for progressing organic electronics. However, manufacturing single-crystal thin films CPs presents substantial challenges due to their complex molecular structures, distorted chain conformations, unbalanced crystallization kinetics. In this work, we demonstrate a universal nanoconfined molecular-dipole orientating strategy craft high-quality variety CPs, spanning from traditional thiophene-...
Stretchable polymer semiconductors are essential materials to realize soft skin-like electronics. However, most high-mobility semiconducting polymers suffer from poor stretchability and strain-dependent charge carrier mobility. Herein, we report an approach improve the of while maintaining The strain independent performance was accomplished by incorporating a nontoxic small molecule, namely triacetin (TA), into conjugated polymers. We observed that TA molecules substantially increased...
Under confinement, unique features of crystallization arise, among which the slowing down and accelerating on cooling are both reported. The controversy can be resolved by performing isothermal experiments, taking into account temperature dependence crystal nucleation growth. experiments thin films were performed for first time in this work wide range thicknesses temperatures, where it crystallizes. Fast scanning calorimetry (FSC, Flash DSC 1) was used to reach fast heating, avoiding...
The glass transition temperature (Tg) of conjugated polymers is a crucial physical parameter that governs their mechanical and electrical properties for applications from sensor technology to skin-like electronics. Despite some well-developed methods exist detecting Tg polymers, there still need the combination advanced calorimetric methodologies characterize in broad range temperatures scales bulk nanometer-thin films. In this work, alternating current (ac) chip calorimetry flash...
Abstract Solid‐state electrolytes have good mechanical and thermal stability to meet the safety performance of advanced lithium‐based rechargeable battery technologies. However, drawbacks such as high interfacial impedance low ionic conductivity solid‐state polymer at room temperature are current demanding challenges that need be addressed. Here, we report hybrid composite electrolyte is composed a chitosan soaked with slightly liquid electrolyte. The has about 6.8×10 −4 S cm −1 outstanding...
The semicrystalline microstructures of donor–acceptor conjugated polymers strongly impact their optoelectronic properties. control the microstructure relies on understandings crystallization processes in these polymers, from packing structures to kinetics. How fast polymer chains crystallize and how chemical pre-existing history influence have so far remained unclear, due rate caused by chain rigid strong interactions. Here, ultrafast scanning calorimetry (FSC) is employed reveal behaviors...
As a key component for wearable electronics, intrinsically stretchable and healable semiconducting polymers are scarce because carrier mobility is often reduced with increasing stretchability self-healability. Here, we combine stepwise polymerization thermal conversion to introduce in situ continuous hydrogen bonding sites polymer backbone without breaking the conjugation or introducing bulky softer side chains, benefiting intrachain interchain charge transport. We demonstrate that regular...
Ultrasmall SnO<sub>2</sub> nanocrystals embedded in porous carbon as potassium ion battery anodes with long-term cycling performance.
The conformational evolution of a conjugated polymer from amorphous to (poly)crystalline is crucial for achieving charge transport in flexible electronic devices. However, the molecular ordering process between these two states not yet well understood poly[2,5-bis(3-hexadecylthiophen-2-yl)thieno[3,2-b]thiophene] (PBTTT). To gain insight into this process, we used combination resonance Raman spectroscopy and fast scanning calorimetry (FSC) real time investigate morphology-dependent...
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Novel difunctional initiators that incorporate Förster/fluorescence resonance energy transfer (FRET) pairs are generated to carry out atom radical polymerization of styrene, methyl methacrylate, and n-butyl methacrylate monomers by an efficient manner. Based on the chemical structures initiators, locations fluorophore moiety dictated be in center chain with accurately quantified functionality (>90% labeling ratio). The site-specific integration FRET dyes into separate polymer centers allows...