A5013395373- Polymer Nanocomposites and Properties
- Gold and Silver Nanoparticles Synthesis and Applications
- Polymer Surface Interaction Studies
- Pickering emulsions and particle stabilization
- Marine Biology and Environmental Chemistry
- Polymer crystallization and properties
- Carbon Nanotubes in Composites
- Biosensors and Analytical Detection
- Adhesion, Friction, and Surface Interactions
- biodegradable polymer synthesis and properties
- Force Microscopy Techniques and Applications
- Nanomaterials for catalytic reactions
- Fiber-reinforced polymer composites
- Plasmonic and Surface Plasmon Research
- Nanoporous metals and alloys
- Surface Modification and Superhydrophobicity
- Advanced Photocatalysis Techniques
- Nanofabrication and Lithography Techniques
- Supramolecular Self-Assembly in Materials
- Polymer Nanocomposite Synthesis and Irradiation
- Dendrimers and Hyperbranched Polymers
- Electrocatalysts for Energy Conversion
- Block Copolymer Self-Assembly
- Calcium Carbonate Crystallization and Inhibition
- Nonlinear Optical Materials Studies
Institute of Materials Research and Engineering
2005-2021
Agency for Science, Technology and Research
2005-2021
Star Technology and Research (United States)
2018
Singapore Polytechnic
2018
Fudan University
2005-2015
Nanyang Technological University
2015
University of Twente
2005-2014
A*STAR Graduate Academy
2014
Dutch Polymer Institute
2006-2011
Institute of Polymers
2006-2009
Multiwalled carbon nanotubes (MWNTs)/nylon-6 (PA6) nanocomposites with different MWNTs loadings have been prepared by the simple melt-compounding approach. A fine and homogeneous dispersion of throughout PA6 matrix is observed transmission electron microscopy. Scanning microscopy observation on fracture surfaces composites shows not only a uniform but also strong interfacial adhesion matrix, as evidenced presence many broken strongly embedded (CNTs) in absence debonding CNTs from matrix....
ADVERTISEMENT RETURN TO ISSUEPREVCommunication to the...Communication the EditorNEXTCarbon Nanotubes Reinforced Nylon-6 Composite Prepared by Simple Melt-CompoundingWei De Zhang, Lu Shen, In Yee Phang, and Tianxi LiuView Author Information Institute of Materials Research Engineering, 3 Link, Singapore 117602 Cite this: Macromolecules 2004, 37, 2, 256–259Publication Date (Web):December 24, 2003Publication History Received22 October 2003Revised12 December 2003Published online24 inissue 1...
Most of the surface‐enhanced Raman scattering (SERS) substrates are 2D planar systems, which limits SERS active area to a single Cartesian plane. Here, we fabricate 3D with aim break traditional limitation, and extend hotspots into third dimension along z‐axis. Our tailored increased in z‐direction from tens nanometers micrometers, increasing by at least an order magnitude larger than confocal volume (∼1 μm) most spectrometers. Various hierarchical SERS‐active microstructures fabricated...
The electrochemical nitrogen reduction reaction (NRR) offers a sustainable solution towards ammonia production but suffers poor performance owing to preferential catalyst-H formation and the consequential hydrogen evolution (HER). Now, Pt/Au electrocatalyst d-band structure is electronically modified using zeolitic imidazole framework (ZIF) achieve Faradaic efficiency (FE) of >44 % with high yield rate >161 μg mgcat-1 h-1 under ambient conditions. strategy lowers position weaken H adsorption...
Abstract Photothermal materials are crucial for diverse heating applications, but it remains challenging to achieve high energy conversion efficiency due the difficulty concurrently improve light absorbance and suppress heat loss. Herein, a zeolitic imidazolate framework‐isolated graphene (G@ZIF) nanohybrid is demonstrated that utilizes ultrathin, heat‐insulating ZIF layers, G@ZIF interfacial nanocavity synergistically intensify localization. Under artificial sunlight illumination (≈1 kW m...
We present the next generation covert plasmonic security labels based on Ag nanowire structures and their polarization dependent surface-enhanced Raman scattering (SERS) imaging. The consist of nanowires fabricated by two-photon lithography thermal evaporation, where molecular probes choice are deposited. Simulation experimental results show that SERS signals from embedded molecules depend significantly incident field. information cannot be revealed directly physical features, but can only...
We demonstrate a multiplex plasmonic anti-counterfeiting platform by embedding multiple molecules on single substrate with superior nanometer scale spectral and spatial resolution. The encoded specific molecular information can be read out only using Raman spectroscopy. Multiplexing increases the complexity of these security labels without compromising
We demonstrate the fabrication of graphene liquid marbles as photothermal miniature reactors with precise temperature control for reaction kinetics modulation. Graphene show rapid and highly reproducible behavior while maintaining their excellent mechanical robustness. By tuning applied laser power, swift regulation marble's surface between 21-135 °C its encapsulated water 21-74 are demonstrated. The modulates in our marble, achieving a 12-fold superior rate constant methylene blue...
Abstract The crystal transformation and thermomechanical properties of melt‐intercalated poly(vinylidene fluoride) (PVDF)/clay nanocomposites are reported in this study. Thermogravimetric analysis (TGA) differential scanning calorimetry (DSC) were used to study the thermal PVDF its with various clay concentrations. incorporation results formation β‐form crystals PVDF. DSC melting behavior suggested presence only α‐phase neat both α‐ β‐phase nanocomposite. This conclusion was corroborated by...
Abstract The crystallization and melting behavior of neat nylon‐6 (PA6) multi‐walled carbon nanotubes (MWNTs)/PA6 composites prepared by simple melt‐compounding was comparatively studied. Differential scanning calorimetry (DSC) results show two exotherms ( T CC, 1 2 ) for PA6/MWNTs instead a single exotherm the matrix. formation higher‐temperature is closely related to addition MWNTs. X‐ray diffraction (XRD) indicate that only α‐phase crystalline structure formed upon incorporating MWNTs...
Abstract Nylon 12 (PA12) nanocomposites with different organoclay loadings were successfully prepared by melt compounding. X‐ray diffraction indicated the dominance of exfoliated clay morphology throughout matrix after mixing in a Brabender twin‐screw extruder, accordance transmission electron microscopy observations. Thermogravimetric analysis showed that thermal stability PA12 was improved about 20 °C on incorporation only 5 wt% clay. Tensile and nanoindentation tests elastic modulus...
Seeing the right face: Mono- and bifunctionalized Janus particles with controllable chemical patchiness are prepared by a general masking/unmasking technique subsequent functionalization (see picture). Supramolecular "host"- "guest"-functionalized were prepared, specific noncovalent host–guest interactions used to controllably assemble heterogeneous particles. Detailed facts of importance specialist readers published as "Supporting Information". Such documents peer-reviewed, but not...
The effective number of surface-enhanced Raman spectroscopy (SERS) active hot spots on plasmonic nanostructures is the most crucial factor in ensuring high sensitivity SERS sensing platform. Here we demonstrate a chemical etching method to increase surface roughness one-dimensional Ag nanowires, targeted at creating more along nanowire's longitudinal axis for increased detection sensitivity. Silver nanowires were first synthesized by conventional polyol and then subjected NH(4)OH H(2)O(2)...
Mechanically robust, magnetic nylon-6 nanocomposites reinforced by one-dimensional (1D) carbon nanotube (CNT)-two-dimensional (2D) clay nanoplatelet hybrids have been prepared using a simple melt-compounding technique. The direct iron-catalyzed chemical vapor deposition (CVD) growth of multiwalled CNTs utilizes iron oxide-immobilized nanoplatelets as substrates, carrying out in situ intercalation and exfoliation nanoplatelets. By such hybridization coexfoliation method, the as-obtained...
Interfacial self-assembly of nanoparticles is capable creating large-area close-packed structures for a variety applications. However, monolayers hydrophilic cetyltrimethylammonium bromide (CTAB)-coated Au are challenging to assemble via interfacial self-assembly. This report presents facile and scalable process fabricate monolayer films ultrathin CTAB-coated nanoprisms at the air-water interface using Langmuir-Schaefer technique. first achieved by one-step functionalization with...
The ultratrace detection and quantification of toxins in both water organic liquids remains a challenge due to the random spreading dilution on substrate-based sensors, especially for with low surface tension. Herein, we fabricate superhydrophobic-oleophobic (SHP-OP) 3D Ag nanowire mesh-like surface-enhanced Raman scattering (SERS) platform overcome issue, demonstrating toxin sensing liquid. Our SHP-OP SERS is able concentrate analyte solutions toluene 100-fold 8-fold smaller areas,...
Current plasmonic metasurfaces of nanocubes are limited to planar configurations, restricting the ability create tailored local electromagnetic fields. Here, we report a new chemical strategy achieve tunable with nonplanar nanocube orientations, creating novel lattice-dependent field localization patterns. We manipulate interfacial behaviors Ag by controlling ratio hydrophilic/hydrophobic molecules added in binary thiol mixture during surface functionalization step. The orientation at an...
Two-photon lithography (TPL) is an emerging approach to fabricate complex multifunctional micro/nanostructures. This because TPL can easily develop various 2D and 3D structures on a variety of surfaces, there has been rapidly expanding pool processable photoresists create different materials. However, challenges in developing two-photon currently impede progress TPL. In this review, we critically discuss the importance photoresist formulation We begin by evaluating commercial design...
Barnacles are a persistent fouling problem in the marine environment, although their effects (eg reduced fuel efficiency, increased corrosion) can be through application of antifouling or fouling-release coatings to structures. However, developments fouling-resistant that cost-effective and not deleterious environment continually being sought. The incorporation proteolytic enzymes into has been suggested as one potential option. In this study, efficacy commercially available serine...
The ability to shape-shift in response a stimulus increases an organism's survivability nature. Similarly, man-made dynamic and responsive "smart" microtechnology is crucial for the advancement of human technology. Here, 10–30 μm shape-changing 3D BSA protein hydrogel microstructures are fabricated with dynamic, quantitative, directional, angle-resolved bending via two-photon photolithography. controlled directional responsiveness achieved by spatially controlling cross-linking density at...