A5034888741- Organic Electronics and Photovoltaics
- Polymer crystallization and properties
- Conducting polymers and applications
- Advanced Sensor and Energy Harvesting Materials
- biodegradable polymer synthesis and properties
- Polymer Nanocomposites and Properties
- Toxoplasma gondii Research Studies
- Liquid Crystal Research Advancements
- Advanced Memory and Neural Computing
- Thin-Film Transistor Technologies
- Organic Light-Emitting Diodes Research
- Carbon Nanotubes in Composites
- Ferroelectric and Piezoelectric Materials
- Supramolecular Self-Assembly in Materials
- Dielectric materials and actuators
- Perovskite Materials and Applications
- MXene and MAX Phase Materials
- Block Copolymer Self-Assembly
- Microplastics and Plastic Pollution
- Silicon Carbide Semiconductor Technologies
- Semiconductor materials and interfaces
- Semiconductor materials and devices
- Cancer Mechanisms and Therapy
- Advanced Materials and Mechanics
- Copper-based nanomaterials and applications
National Cheng Kung University
2015-2025
Tainan University of Technology
2020
University of Akron
2001-2011
Institut Charles Sadron
2005-2006
Centre National de la Recherche Scientifique
2005-2006
Centrum Badań Molekularnych i Makromolekularnych Polskiej Akademii Nauk
2006
Polish Academy of Sciences
2006
Université Libre de Bruxelles
2005
Ritsumeikan University
2005
Rensselaer Polytechnic Institute
2004-2005
Abstract Herein, a new high entropy material is reported, i.e., noble metal‐free glycerate (HEG), synthesized via simple solvothermal process. The HEG consists of 5 different metals Fe, Ni, Co, Cr, and Mn. unique structure exhibits an excellent oxygen evolution reaction (OER) activity with low overpotential 229 278 mV at current densities 10 100 mA cm −2 , respectively, in 1 m KOH electrolyte, outperforming its subsystems binary‐, ternary‐, quaternary‐metal glycerates. also shows outstanding...
Melt crystallization of racemic polylactide (equimolar PLLA/PDLA) blend upon slow cooling (1 °C/min from 270 °C) was studied via a combination wide-angle X-ray scattering (WAXS), differential scanning calorimetry (DSC), and Fourier-transform infrared spectroscopy (FTIR). Results indicated extensive development (32/31) helical pairs below 220 °C, followed by emergence broad mesomorphic peak in the WAXS profile 190 °C; intensity this mesophase started to decrease at 150 with concomitant WAXS-...
Isotactic copolymers of 1-propene and 1-hexene that contain over 10% up to about 25% hexane units in the chain have been shown crystallize an unusual crystal modification differs significantly from well-known structures isotactic polypropylene (α, β, γ phases) or poly(1-hexene) (Macromolecules 2005, 38, 1232). The experimental data obtained by Poon et al. are reinterpreted analyzed. new form has a trigonal unit-cell with parameters = b 1.717 nm, c 0.65 very similar I poly(1-butene) (iPBu)...
In the last decade, technological advancements in signal transmission, particularly fifth generation (5G) and emerging sixth (6G) wireless technologies, have grown at an exponential rate. While 5G provides...
Poly(vinylcyclohexane) (PVCH) is a patented polymeric nucleating agent for isotactic polypropylene (iPP) and induces its alpha crystal modification (αiPP). The structural interactions at the root of this activity are investigated by analyzing transcrystallization single crystals αiPP on PVCH. Electron microscopy results indicate (i) quasi-perfect two-dimensional lattice match in contact plane, with (100)PVCH facing (110)αiPP or (1̄10)αiPP planes, (ii) consistent link between PVCH crystals'...
A series of achiral 4-biphenyl carboxylic acid compounds (BPCA-Cn-PmOH) connected with alkoxyl chains having various carbon numbers (n = 6−10) and terminated by phenyl groups meta-positioned hydroxyl was synthesized. Different phase structures including nematic, smectic (SmA), C (SmC), highly ordered liquid-crystalline phases along crystalline were identified based on wide-angle X-ray diffraction electron experiments. It found via infrared spectroscopy that the hydrogen (H)-bonds formed...
Organic synaptic transistors are a promising technology for advanced electronic devices with simultaneous computing and memory functions the application of artificial neural networks. In this study, neuromorphic electrical characteristics organic electrolyte-gated correlated microstructural interfacial properties active layers. This is accomplished by utilizing semiconducting/insulating polyblend-based pseudobilayer embedded source drain electrodes, referred to as PB-ESD architecture. Three...
A systematic study was carried out to decipher the mechanism of Curie transition piezoelectric crystals poly(vinylidene fluoride trifluoroethylene) P(VDF-TrFE). The unique polarity P(VDF-TrFE) crystalline phase below curie temperature is attributed lattice packing all-trans molecular chains, which allocates all substituted fluorine atoms on one side chains and hydrogen other side. Therefore, a net dipole moment created across lateral chains. Nevertheless, due mutual repulsion among fluorene...
We demonstrate semiconducting polymer-based thin-film transistors (PTFTs) with fast switching performance and an uncommon nondecaying feature. These PTFTs based on widely studied poly(3-hexylthiophene) are developed by incorporating the insulating polymer into active channel subjecting compound to specific, spontaneous multiple-scale phase separation (MSPS). An in-depth study is conducted interfacial phase-separated microstructure of semiconducting/insulating blending layer its effect...
Abstract Unveiled as a unique feature of polymer ferroelectric crystals, oriented coalescence within monolayers poly(vinylidenefluoride‐ co ‐trifluoroethylene)(PVDF‐TrFE) crystals has been found regulable upon monolayer roughness, which is accompanied by the adjustment piezoelectric responses, and thus phase polarity. Simply with deposition poly(3‐hexylthiophene (P3HT)‐wrapped molybdenum disulfide (MoS 2 ) sheets, responses are surprisingly enhanced further. Also dependent on degrees...
A series of specially designed polyesters consisting aromatic main-chain/side-chain liquid crystalline (LC) polymers for flat-panel display applications have been synthesized via polycondensation 2,2'-bis(trifluoromethyl)-4,4'-biphenyldicarbonyl chloride with 2,2'-bis{ω-[4-(4-cyanophenyl) phenyoxy]-n-alkoxycarbonyl}-4,4'-biphenyldiol (PEFBP(n), where n is the number methylene units in side chains). For a PEFBP polyester which 4-cyanobiphenyl mesogen each chain coupled backbone seven units,...
A novel nickel self-aligned silicide (SALICIDE) process technology has been developed for CMOS devices with physical gate length of sub-40 nm. The excess silicidation problem due to edge effect is effectively solved by using a low-temperature, in-situ formed Ni-rich silicide. With this new process, poly prevented. Island diode leakage current and breakdown voltage are also improved.
The internal structure of single crystals and twinned isotactic poly(vinylcyclohexane) (PVCH) has been investigated by electron diffraction dark-field imaging following a procedure introduced Pradère et al. (Macromolecules 1988, 21, 2747). Crystals produced in thin film at high Tc are crystalline. At somewhat lower Tc, they display large sectors bounded (200) (020) planes only. PVCH from squalane or phenyldecane solutions very small, elongated domains oriented normal to the growth faces:...
Morphological evolution of poly(l-lactic acid) (PLLA) crystals obtained via crystallization at Tc = 85 to 97 °C from 0.1% solutions in mixed xylene was closely followed transmission electron microscopy. Upon stirring-enhanced nucleation after the adopted incubation scheme (ti 10 h Ti 90 °C), there emerged “a axis” lenticular imperfectly packed α form, as indicated by presence presumably forbidden (010) spot selected-area diffraction along [001] zone. Subsequently observed during further...
Conjugated polymer–fullerene-based bulk-heterojunction (BHJ) organic solar cells (OSCs) have attracted tremendous attention over the past two decades because of their potential to develop low-cost and easy methods produce energy from light. The complicated microstructure morphology with randomly organized architecture these active layers (ALs) is a key factor that limits photovoltaic performance. In this study, binary-solvent annealing (BSA) approach was established improve...
Intermolecular interactions are crucial in determining the morphology of solution-processed semiconducting polymer thin films. However, these random often lead to disordered or short-range ordered structures. Achieving long-range order films has been a challenge due limited control over microscopic current techniques. Here, we present molecular-level methodology that leverages spatial matching intermolecular dynamics among solutes, solvents, and substrates induce directional molecular...
Crystal nucleation in a quiescent 0.3 wt % poly(l-lactide) (PLLA)/p-xylene solution is sluggish at 90 °C. Instead of straightforward crystallization, there sigmoid decrease viscosity, reflecting reduced hydrodynamic volume (VH), and therefore the collapse dissolved PLLA chains during this incubation stage. With enhanced via gentle stirring, kinetically favored "a-axis" lenticular crystals start to emerge; acute apex angle these decreases with coils, indicating an altered preference step...
Via transmission electron microscopy, it was revealed that epitaxial crystallization on hexamethylbenzene substrate led to oriented arrays of individual long-chain poly(l-lactide) edge-on lamellae. Selected-area diffraction patterns indicated orientational deviations packed stems from lamellar normal, i.e., stem tilt the bc contact plane as a result stairlike packing. Upon growth beyond edges underneath substrates, correlated bending lamellae in counterclockwise manner developed. The direct...