A5079401618- Conducting polymers and applications
- Organic Electronics and Photovoltaics
- Advanced Sensor and Energy Harvesting Materials
- Polydiacetylene-based materials and applications
- Supramolecular Self-Assembly in Materials
- Luminescence and Fluorescent Materials
- Graphene research and applications
- Synthesis and Properties of Aromatic Compounds
- Analytical Chemistry and Sensors
- Gas Sensing Nanomaterials and Sensors
- Synthesis and properties of polymers
- Advanced Chemical Sensor Technologies
- Nanoparticle-Based Drug Delivery
- Polymer composites and self-healing
- Fullerene Chemistry and Applications
- Nanoplatforms for cancer theranostics
- Cancer Cells and Metastasis
- Covalent Organic Framework Applications
- Photochromic and Fluorescence Chemistry
- Molecular Junctions and Nanostructures
- Perovskite Materials and Applications
- Metal-Organic Frameworks: Synthesis and Applications
- Porphyrin and Phthalocyanine Chemistry
- Carbon Nanotubes in Composites
- Thin-Film Transistor Technologies
University of Windsor
2017-2025
Windsor Dermatology
2018-2020
Oxford University Press (United Kingdom)
2020
Stanford University
2015-2018
Université Laval
2010-2017
Laboratoire des Matériaux Avancés
2017
Rice University
2015
Université du Québec à Chicoutimi
2008
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%...
An array of highly sensitive pressure sensors entirely made biodegradable materials is presented, designed as a single-use flexible patch for application in cardiovascular monitoring. The high sensitivity combination with fast response time unprecedented when compared to recent reports on (sensitivity three orders magnitude higher), illustrated by pulse wave velocity measurements, toward hypertension detection. As service our authors and readers, this journal provides supporting information...
Abstract Nonconjugated segments in polymer semiconductors have been utilized to improve the processability of semiconducting polymers. Recently, several reports described improvement stretchability by incorporating nonconjugated spacers. However, effect relative flexibility such conjugation breakers on mechanical and electrical properties has not yet studied systematically. Here, with different chain length rigidity are incorporated into backbone diketopyrrolopyrrole‐based semiconductors....
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,...
Soluble organic nanorods were prepared from phenylacetylene macrocycles using the topochemical polymerization of butadiyne moieties placed both inside and outside macrocycles' skeletons. Macrocycles containing amide groups self-assembled in a columnar fashion through formation an organogel ethyl acetate. Upon irradiation with UV light, Raman signals associated units completely vanished, indicating creation covalently linked nanorods.
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...
A simple and efficient strategy to modulate the self-assembly solid-state morphology of conjugated polymers has been developed by incorporating various amounts amide-containing alkyl side chains high charge carrier mobility based on diketopyrrolopyrrole (DPP). Synthetically easily accessible tunable, incorporation is a direct promote intermolecular hydrogen bonding between polymer tune morphology. Incorporation 5–30 mol % amides in was performed without drastic decrease solubility. The...
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)...
Incorporation of hydrogen bond moieties into the backbone or side chain conjugated polymers is an effective strategy to enhance mechanical performance, facilitate morphological organization, and promote self-healing ability. However, understanding bonds, particularly effect strength directionality, on thermomechanical optoelectronic performance still in its infancy due competing influence morphology, glass transition phenomena, measurement process itself. Here, we compare statistically...
Conjugated polymer (CP) films with nanometer-scale thickness exhibit unique properties distinct from their bulk counterparts, which is an important consideration for end application as thin film devices. In the realm of organic electronic devices, enabling high electrical conductance CPs often necessitates doping. However, impact doping on intrinsic mechanical properties, such elastic modulus, in ultrathin at device-relevant thicknesses not well understood and has been directly measured....
With the recent development of printable organic electronics and flexible devices, new strategies are developed investigated to design conjugated semiconducting polymers with innovative properties such as molecular stretchability self-healing. This review covers most progress in preparation these materials, a special emphasis on non-covalent dynamic bonding other key elements achieve systems. New developments high performance fully stretchable devices also discussed. In contrast previously...
This minireview covers the most recent examples of covalent rigidification supramolecular self-assemblies through photopolymerization diacetylene moieties.
An efficient strategy to modify the mechanical properties of conjugated polymers has been developed through incorporation amide moieties.
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...
In this work, a facile and simple yet effective method to generate intrinsic autonomous self-healing polymers was developed, leading new materials that can be easily fine-tuned both mechanically chemically.
This review presents emerging strategies for materials scientists to design, prepare and process semiconducting polymers in a more sustainable eco-friendly manner.
Abstract Donor–acceptor (D–A) type semiconducting polymers have shown great potential for the application of deformable and stretchable electronics in recent decades. However, due to their heterogeneous structure with rigid backbones long solubilizing side chains, fundamental understanding molecular picture upon mechanical deformation still lacks investigation. Here, orientation diketopyrrolopyrrole (DPP)‐based D–A polymer thin films is probed under tensile via both experimental measurements...
Abstract Intrinsic mechanical properties of sub-100 nm thin films are markedly difficult to obtain, yet an ever-growing necessity for emerging fields such as soft organic electronics. To complicate matters, the interfacial contribution plays a major role in and is often unexplored despite supporting substrates being main component current metrologies. Here we present shear motion assisted robust transfer technique fabricating free-standing measuring their inherent structural–mechanical...
Tuning the optoelectronic properties of donor-acceptor conjugated polymers (D-A CPs) is great importance in designing various organic devices. However, there remains a critical challenge precise control bandgap through synthetic approach, since chain conformation also affects molecular orbital energy levels. Here, D-A CPs with different acceptor units are explored that show an opposite trend band gaps increasing length oligothiophene donor units. By investigating their and energy, it found...
The naturally occurring cytotoxic saponin 28-O-β-d-glucopyranosylbetulinic acid 3β-O-α-l-arabinopyranoside (3) was easily synthesized along with seven bidesmosidic saponins starting from the lupane-type triterpenoids betulin (1) and betulinic (2). As highlighted by preliminary cytotoxicity evaluation against A549, DLD-1, MCF7, PC-3 human cancer cell lines, 22a, bearing α-l-rhamnopyranoside moieties at both C-3 C-28 positions, determined to be a potent agent (IC50 1.8−1.9 μM).