A5044817829- Block Copolymer Self-Assembly
- Advanced Polymer Synthesis and Characterization
- Polymer crystallization and properties
- X-ray Diffraction in Crystallography
- Crystallization and Solubility Studies
- Conducting polymers and applications
- biodegradable polymer synthesis and properties
- Polymer Surface Interaction Studies
- Polymer Nanocomposites and Properties
- Fluid Dynamics and Thin Films
- Organic Electronics and Photovoltaics
- Covalent Organic Framework Applications
- Rheology and Fluid Dynamics Studies
- Gold and Silver Nanoparticles Synthesis and Applications
- Mesoporous Materials and Catalysis
- Liquid Crystal Research Advancements
- Enzyme Structure and Function
- Perovskite Materials and Applications
- Machine Learning in Materials Science
- Fusion materials and technologies
- Protein Structure and Dynamics
- Nanowire Synthesis and Applications
- Pickering emulsions and particle stabilization
- Electrocatalysts for Energy Conversion
- Nanopore and Nanochannel Transport Studies
National Cheng Kung University
2000-2025
East China Normal University
2025
National Central University
2013-2022
National Synchrotron Radiation Research Center
2004-2009
University of Würzburg
2009
Stanford University
2008-2009
BASF (United States)
2009
National Tsing Hua University
2006-2007
Industrial Technology Research Institute
2006-2007
Stanford Synchrotron Radiation Lightsource
2001
The syntheses and comprehensive characterization of 14 organic semiconductors based on perylene bisimide (PBI) dyes that are equipped with up to four halogen substituents in the bay area core five different highly fluorinated imide described. influence LUMO level solid state packing PBIs was examined by cyclic voltammetry single crystal structure analyses seven PBI derivatives, respectively. Top-contact/bottom-gate thin film transistor (OTFT) devices were constructed vacuum deposition these...
Herein, we demonstrate a facile, room-temperature method for synthesizing highly luminescent methylammonium lead bromide (MAPbBr₃) nanocubes encapsulated within colloidal polystyrene-block-poly(2-vinylpyridine) (PS-b-P2VP) micelles in non-polar 1,3,5-trimethylbenzene (TMB) solvent. The synthesis...
Membranes with uniform, straight nanopores have important applications in diverse fields, but their application is limited by the lack of efficient producing methods high controllability. In this work, we reported on an extremely simple and strategy to produce such well-defined membranes. We demonstrated that neutral solvents were capable annealing amphiphilic block copolymer (BCP) films polystyrene-block-poly(2-vinylpyridine) (PS-b-P2VP) thicknesses up 600 nm perpendicular orientation...
Mercaptoacetic acid-modified CdS nanoparticles disperse selectively in the poly(4-vinylpyridine) domains of poly(styrene-b-4-vinylpyridine) (S4VP) block copolymer as a result formation hydrogen bonds. This process turn induces morphological transformation S4VP from hexagonally packed cylinder structure into lamellar structure, evidenced transmission electron microscopy, atomic force and small-angle X-ray scattering studies. is consistent with that suggested by theoretical prediction phase...
A series of semicrystalline block copolymers, poly(4-vinylpyridine)-block-poly(ε-caprolactone) (P4VP−PCL), with lamellar microstructure have been synthesized. Owing to the vitrified P4VP microdomains and strongly segregated microphase separation, crystallization PCL blocks in P4VP−PCL was carried out within nanoscale confinement. Simply by varying molecular weight copolymer, namely confined size, polymeric can be tailored one-dimensional distinct nucleation mechanism, altering from...
Hexacene and larger fused rings remain elusive targets for chemists. Here, we report a hexacene-like molecule containing six linearly rings, specifically pentacene with terminal thiophene ring, pentaceno[2,3-b]thiophene. It can be purified isolated as purple-black powder at ambient conditions. This has low HOMO−LUMO gap of 1.75 eV in o-DCB an optical band 1.58 thin film. Top contact organic film transistors (OTFTs) were made, atomic force microscopy (AFM) reveals dendritic growth...
The effects of the interplay between energetic and kinetic factors on air stability n-channel organic thin-film transistors (OTFTs) were studied using two perylene diimide (PDI) compounds with distinctly different lowest unoccupied molecular orbital (LUMO) levels. On basis empirical energy level windows, one compound (N,N′-bis(2,2,3,3,4,4,5,5,5-nonafluoropentyl)-3,4:9,10-tetracarboxylic acid (PDI-F): −3.84 eV) is at onset region for stability, whereas other...
A flexible hybrid substrate was developed by affixing gold nanoparticles (AuNPs) onto the surface of two-dimensional nanomica platelets (NMPs). The successfully used in biosensors with high efficiency and selectivity through surface-enhanced Raman scattering (SERS). By controlling amphiphilicity substrate, made highly selective toward biomolecules. Four different SERS systems were constructed, including intercalated mica, exfoliated NMPs, hydrophilic hydrophobic NMPs. NMPs only 1 nm thick....
Moiré superlattices in two-dimensional stacks have attracted worldwide interest due to their unique electronic properties. A typical example is the moiré ferroelectricity, where adjacent moirés exhibit opposite spontaneous polarization that can be switched through interlayer sliding. However, contrast ideal regular ferroelectric domains (equilateral triangles) built most theoretical models, unavoidable irregular supercells (non-equilateral induced by external strain fields during transfer...
Resistive switchable memory devices were fabricated using self-assembled composite thin films of asymmetric poly(styrene-block-4-vinylpyridine) (PS-b-P4VP) block copolymers (BCP) and fullerene derivatives (PCBM). L1 (with a longer PS block) was comprised discrete vertical P4VP nanocylinders embedded within the matrix whereas L2 revealed reverse morphology with horizontal orientation. They used to control spatial location or distribution PCBM resultant characteristics. The ITO/BCP:PCBM/Al...
ADVERTISEMENT RETURN TO ISSUEPREVNoteNEXTPolymeric Crystallization under Nanoscale 2D Spatial ConfinementTsai-Ming Chung†, Tzu-Chung Wang†, Rong-Ming Ho*†, Ya-Sen Sun*‡, and Bao-Tsan Ko§View Author Information† Department of Chemical Engineering, National Tsing Hua University, Hsinchu 30013, Taiwan‡ Materials Central Taoyuan 32001, Taiwan§ Chemistry, Chung Yuan Christian Chungli 32023, Taiwan*To whom the correspondence should be addressed: Tel 886-3-5738349, Fax 886-3-5715408, e-mail [email...
ADVERTISEMENT RETURN TO ISSUEPREVNoteCrystal Orientation within Lamellae-Forming Block Copolymers of Semicrystalline Poly(4-vinylpyridine)-b-poly(ε-caprolactone)Ya-Sen Sun, Tsai-Ming Chung, Yi-Jing Li, Rong-Ming Ho, Bao-Tsan Ko, and U-Ser JengView Author Information National Synchrotron Radiation Research Center, Hsinchu 30076, Taiwan; Department Chemical Engineering, Tsing-Hua University, 30013, Material Laboratories, Industrial Technology Institute, Taiwan Cite this: Macromolecules 2007,...
Abstract A series of efficient zinc catalysts supported by sterically bulky benzotriazole phenoxide ( BTP ) ligands are synthesized and structurally characterized. The reactions diethyl (ZnEt 2 with CMe2Ph ‐H, t‐Bu TMCl ‐H yield monoadduct [(μ‐ )ZnEt] 1 – 3 ), respectively. Bisadduct complex [( Zn] 4 results from treatment ZnEt (2 equiv.) in toluene, but the same stoichiometric proportion Et O produces five‐coordinated monomeric Zn(Et O)] 5 ). molecular structures compounds , characterized...
The growth of Sr on n-type Si(001) was studied in detail for coverages between 0 and 1 monolayer (ML) using core level photoemission spectroscopy. In a similar manner, the saturation coverage 600–925 °C temperature range. Data analysis carried out by method that allows accurate determination band-bending shifts. Using this it is possible to pinpoint formation destruction chemical species from bungled data without needing know details composition spectra. Through established interaction Si...
CdS nanoparticles with surfaces modified by mercaptoethanol have been synthesized for greater solubility in dimethylformamide (DMF) and the ability to preferentially bind poly(ethylene oxide) (PEO) blocks of polystyrene-block-poly(ethylene (PS-b-PEO) copolymer. The size surface-modified (M-CdS) DMF can be characterized Schultz distribution a mean radius 18.4 Å polydispersity 0.5, using small-angle X-ray scattering (SAXS). These M-CdS further disperse PS-b-PEO, slightly larger than that...
A SWAXS (small- and wide-angle X-ray scattering) instrument was recently installed at the wiggler beamline BL17B3 of National Synchrotron Radiation Research Center (NSRRC), Taiwan. The instrument, which is designed for studies static dynamic nanostructures correlations between nano (or meso ) structure (SAXS) crystalline (WAXS), provides a flux 10 –10 11 photon s −1 sample energies 5 14 keV. With SAXS area detector WAXS linear connected to two data acquisition systems operated in...
Surface-enhanced Raman scattering (SERS) spectroscopy is a rapid and non-destructive optical detection method that has been applied in various applications. Recently, three-dimensional (3D) substrate-based silicon nanostructures have widely used as SERS substrates due to their high sensitivity, repeatability, reusability. This paper uses simple low-cost electroless etching deposition process generate silver nanoparticle-decorated porous (Ag-PS) substrates. We propose contact localized Ag-PS...
Large arrays of α-sexithiophene (α-6T) crystals with controlled sizes and various shapes such as stripes, squares, hexagons, etc. are successfully demonstrated using an SiO2 surface patterned Au films a template. Top-contact field-effect transistors fabricated α-6T exhibited mobilities high 0.1 cm2/(V s).