A5008173241- Advanced Sensor and Energy Harvesting Materials
- Conducting polymers and applications
- Advanced Materials and Mechanics
- Thermal Radiation and Cooling Technologies
- Solar-Powered Water Purification Methods
- Tactile and Sensory Interactions
- Micro and Nano Robotics
- Hydrogels: synthesis, properties, applications
- Innovative Energy Harvesting Technologies
- Advanced Thermoelectric Materials and Devices
- Advanced Fiber Optic Sensors
- Metamaterials and Metasurfaces Applications
- Advanced Polymer Synthesis and Characterization
- Polymer composites and self-healing
- Supercapacitor Materials and Fabrication
- Soft Robotics and Applications
- Phase Change Materials Research
- Advanced Drug Delivery Systems
- Muscle activation and electromyography studies
- Pickering emulsions and particle stabilization
- Solar Thermal and Photovoltaic Systems
- Advanced Memory and Neural Computing
National University of Singapore
2017-2022
ORCID
2020
Institute of Materials Research and Engineering
2013
Hydrogels are promising starting materials for biomimetic soft robots as they intrinsically and hold properties analogous to nature's organic parts. However, the restrictive mold-casting post-assembly fabrication alongside mechanical fragility impedes development of hydrogel-based robots. Herein, we harness biocompatible alginate a rheological modifier manufacture 3D freeform architectures both chemically physically cross-linked hydrogels using direct-ink-write (DIW) printing. The...
Abstract Textile electronics are poised to revolutionize future wearable applications due their wearing comfort and programmable nature. Many promising thermoelectric wearables have been extensively investigated for green energy harvesting pervasive sensors connectivity. However, the practical of TE textile still hindered by current laborious p/n junctions assembly limited scale mechanical compliance. Here we develop a gelation extrusion strategy that demonstrates viability digitalized...
Utilization of ubiquitous low-grade waste heat constitutes a possible avenue towards soft matter actuation and energy recovery opportunities. While most materials are not all that smart relying on power input some kind for continuous response, we conceptualize self-locked thermo-mechano feedback autonomous motility generation functions. Here, the usually dismissed as 'not useful' is used to fuel thermo-mechano-electrical system perform perpetual untethered multimodal locomotions. The...
Living organisms are capable of sensing and responding to their environment through reflex-driven pathways. The grand challenge for mimicking such natural intelligence in miniature robots lies achieving highly integrated body functionality, actuation, mechanisms. Here, somatosensory light-driven (SLiRs) based on a smart thin-film composite tightly integrating actuation multisensing presented. SLiR subsumes pyro/piezoelectric responses piezoresistive strain sensation under photoactuator...
Triboelectric nanogenerators with enhanced output performance by surface texturing and dielectric constant control.
Adaptive tendril coiling of climbing plants has long inspired the artificial soft microsystem for actuation and morphing. The current bionic research efforts on focus either preparation materials with geometry or design self-shaping materials. However, realization two key functional features tendril, spring-like buffering connection axial contraction, remains elusive. Herein, we devise a conductive by fusing yarns into configuration, bypassing prevailing conductivity constraints mechanical...
Abstract Harvesting of prevalent low grade solar heat from otherwise wasted energy has received tremendous attention. However, extensive and continuous conversion remains challenging due to distributed nature heat, limited temperature difference with the surroundings, ambient fluctuation, night time period darkness. Herein, a hybrid thermogalvanic pyroelectric generator for multisituation structured/unstructured, static/dynamic, day/night waste harnessing operation is reported. Powered by...
Abstract Intrinsically self‐healing stretchable polymers have been intensively explored for soft robotic applications due to their mechanical compliance and damage resilience. However, prevalent use in real‐world is currently hindered by various limitations such as low strength, long healing time, external energy input requirements. Here, a supramolecular magnetic elastomer (SHSME), featuring hierarchical dynamic polymer network with abundant reversible bonds, introduced. The SHSME exhibits...
Abstract Mechanical properties of hydrogels are crucial to emerging devices and machines for wearables, robotics energy harvesters. Various polymer network architectures interactions have been explored achieving specific mechanical characteristics, however, extreme property tuning single-composition hydrogel material deployment in integrated remain challenging. Here, we introduce a macromolecule conformational shaping strategy that enables programming polymorphic fiber based devices....
On-skin patches that record biopotential and biomechanical signals are essential for wearable healthcare monitoring, clinical treatment, human-machine interaction. To acquire wearing comfort high-quality signals, with tissue-like softness, elastic recovery, damage tolerance, robust bioelectronic interface highly desired yet challenging to achieve. Here, we report a dry epidermal patch made from supramolecular polymer (SESA) an in situ transferred carbon nanotubes' percolation network. The...
At present, there are various limitations to harvesting ambient waste heat which include the lack of economically viable material and innovative design features that can efficiently recover low grade for useful energy conversion. In this work, a thermal nanophotonic-pyroelectric (TNPh-pyro) scheme consisting metamaterial multilayer pyroelectric material, performs synergistic rejection photothermal heat-to-electricity conversion, is presented. Unlike any other configuration, conceptual...
ABSTRACT Pluronics F127 or (PEG) 99 –(PPG) 69 –(PEG) (with PEG and PPG representing polyethylene glycol polypropylene glycol, respectively) was chemically modified by reacting with poly(polytetrahydrofuran carbonate) (PTHF) diol using a standard poly(urethane) reaction. The poly(F127/PTHF urethane)s showed lower critical gelation concentration as compared F127. solution properties of these polymers were investigated at different temperatures hydrophobic dye probe. thermodynamic variables...
Abstract Surface plasmon‐based photonics offers exciting opportunities to enable fine control of the site, span, and extent mechanical harvesting. However, interaction between plasmonic photothermic piezoresponse still remains underexplored. Here, spatially localized controllable a hybrid self‐polarized polymeric‐metallic system that correlates light‐to‐heat modulation local strain is demonstrated. The associated plasmons serve as efficient nanoheaters leading self‐regulated via thermal...
This article presents a fully energy-autonomous temperature-to-time converter (TTC), entirely powered up by triboelectric nanogenerator (TENG) for biomedical applications. Existing sensing systems either consume too much power to be sustained energy harvesting or have poor accuracy. Also, the of low-frequency input has been challenging due high reverse leakage rectifier. The proposed dynamic suppression full-bridge rectifier (DLS-FBR) reduces current more than 1000 <inline-formula...
Smart nanoparticle swarm allows dynamic multimaterials integration to access distinctive functions.
Abstract Textile electronics are poised to revolutionize future wearable applications due their wearing comfort and programmable nature. Many promising thermoelectric (TE) wearables have been extensively investigated for green energy harvesting pervasive sensors connectivity. However, the practical of TE textile still hindered by current laborious p/n junctions assembly limited scale mechanical compliance. Here we develop a gelation extrusion strategy that demonstrates viability digitalized...
We present a fully energy-autonomous temperature-to-time converter (TTC) for biomedical applications. This is the first work in literature to power entire purely by triboelectric energy harvester (TEG). The dynamic leakage suppression full-bridge rectifier (DLS-FBR) reduces reverse current 1/100, which enables TEG operated human motion at <; 1 Hz as sole source; once harvested voltage reaches 0.6 V, one-shot TTC converts temperature into pulse width, measuring range of 15 °C-45 °C. 0.18-μm...