A5037503722- Minerals Flotation and Separation Techniques
- Nanopore and Nanochannel Transport Studies
- Iron oxide chemistry and applications
- Organic Electronics and Photovoltaics
- Advanced Sensor and Energy Harvesting Materials
- Carbon Nanotubes in Composites
- Conducting polymers and applications
- nanoparticles nucleation surface interactions
- Graphene research and applications
- Solar-Powered Water Purification Methods
- Characterization and Applications of Magnetic Nanoparticles
- Methane Hydrates and Related Phenomena
- Gas Sensing Nanomaterials and Sensors
- Organic and Molecular Conductors Research
- Advanced MEMS and NEMS Technologies
- Luminescence and Fluorescent Materials
- Thermal properties of materials
- Advanced Thermoelectric Materials and Devices
- Advanced Chemical Sensor Technologies
- Heat Transfer and Optimization
- Spectroscopy and Quantum Chemical Studies
- Electronic and Structural Properties of Oxides
- Dielectric materials and actuators
- Fluid Dynamics and Thin Films
- Advanced Materials Characterization Techniques
Stanford University
2022-2024
Kyushu University
2016-2024
Abstract Dielectric elastomer actuators (DEAs) offer versatile applications including haptics, soft robotics and smart lenses. However, due to the lack of conductive electrodes with low modulus high stretchability, their use is limited by nonsolid electrodes, hindering integration other systems. In this study, transparent patternable solid achieving actuation performance comparable a commonly used non‐solid counterpart (e.g., carbon grease), stretchable conducting polymer composed PEDOT:PSS...
Fluids confined in a nanoscale space behave differently than the bulk due to strong interactions between fluid molecules and solid atoms. Here, we observed water inside "open" hydrophilized carbon nanotubes (CNT), with diameter of tens nanometers, using transmission electron microscopy (TEM). A 1–7 nm film adhering most inner wall surface was remained stable high vacuum (order 10–5 Pa) TEM. The superstability this attributed combination curvature, nanoroughness, confinement resulting lower...
Stretchable polymer semiconductors are essential materials to realize soft skin-like electronics. However, most high-mobility semiconducting polymers suffer from poor stretchability and strain-dependent charge carrier mobility. Herein, we report an approach improve the of while maintaining The strain independent performance was accomplished by incorporating a nontoxic small molecule, namely triacetin (TA), into conjugated polymers. We observed that TA molecules substantially increased...
Conjugated polymers based on indacenodithiophene–benzothiadiazole (IDT–BT) have attracted great interest due to their high charge carrier mobilities while being low crystallinity (i.e., near-amorphous). They represent a promising design strategy achieve both excellent stretchability and electrical performance. Here, we describe an approach structural modifications of IDT–BT, namely, by introducing noncovalent interactions substituting building blocks promote extended coplanar backbones. We...
Water confined in carbon nanotubes (CNTs) can exhibit distinctly different behaviors from the bulk. We report transmission electron microscopy (TEM) observation of water phases inside hydrophobic cup-stacked CNTs exposed to high vacuum. Unexpectedly, we observed stable morphologies beyond surface-tension dominance, including nanometer thin free films, complex water-bubble structures, and zigzag-shaped liquid–gas interface. The menisci are inflected, where measured contact angles on CNT inner...
We observed the instability of a few-nanometer-thick water film encapsulated inside graphene nanoscroll using transmission electron microscopy. The film, that was left after recession meniscus, formed ripples along length with distance only 20%-44% predicted by classical Plateau-Rayleigh theory. results were explained theoretical analysis incorporates effect van der Waals interactions between and layers. derived important insights into behavior liquid under nanoscale confinement in...
Graphene liquid cells provide the highest possible spatial resolution for liquid-phase transmission electron microscopy. Here, in graphene (GLCs), we studied nanoscale dynamics of bubbles induced by controllable damage graphene. The extent depended on dose rate and presence cell. After was damaged, air leaked from into water. We also observed unexpected directional nucleation new bubbles, which is beyond explanation conventional diffusion theory. attributed this to effect confinement. These...
Probing the dynamics of nanobubbles is essential to understand their longevity and behavior. Importantly, such an observation requires tools techniques having high temporal resolutions capture intrinsic characteristics nanobubbles. In this work, we have used in situ liquid-phase electron microscopy (LPEM) technique gain insights into nanobubbles' behavior interfacial dynamics. Interestingly, could observe a freely growing-shrinking nanobubble pinned under same experimental conditions,...
TIPS-PPP, a novel TIPS-PEN derivative, features vertically extended pentacene core for increased π–π overlap, enabling exploration of structure–morphology–property connections and exhibiting enhanced stability/electronic performance.
We report a quasi-three-dimensional observation of electron-beam-induced nanobubbles inside 1000 nm thick layer water using the liquid cell electron microscopy. In early stage observation, heterogeneous bubble nucleation occurred, and small bubbles coalesced with adjacent when they come in contact each other. However, for first time, we found that after prolonged beam irradiation did not occur more, then homogeneous started even though solid surface was available nucleation. conclude Ostwald...
Nanobubbles have attracted great interest in recent times because of their application water treatment, surface cleaning, and targeted drug delivery, yet the challenge remains to gain thorough understanding unique behavior dynamics for utilization numerous potential applications. In this work, we used a liquid-phase electron microscopy technique insights into quasistatic merging nanobubbles. The beam environment was controlled order suppress any new nucleation slow down process. transmission...
A new method is proposed to measure the longitudinal thermal conductivity of fibers and films. The novel one- two-dimensional materials has previously been measured using a T-type probe. Although this applicable polymer films, measurements are influenced by contact resistance between probe sample. We therefore propose so-called ITX method, which determines inherent sample from made in three geometric configurations ("I", "T", "X" shape) sample, heat sinks, measurement Application DNA solid...
Liquid cell electron microscopy (LCEM) is a useful experimental method of bubble nucleation, which not understood sufficiently because it difficult to observe nucleation at nanometer scale in real-time. In our TEM observation, when an beam irradiated water, interfacial nanobubbles were generated and grew nano liquid cell, whose gap was filled with pure water between two silicon nitride (Si3N4) membranes. this paper, we introduce Fresnel fringe method, enable understand the position nucleated...