A5027004191- Carbon Nanotubes in Composites
- Conducting polymers and applications
- Graphene research and applications
- Advanced Sensor and Energy Harvesting Materials
- Smart Materials for Construction
- Supercapacitor Materials and Fabrication
- Nanotechnology research and applications
- Fiber-reinforced polymer composites
- Polymer Nanocomposites and Properties
- Force Microscopy Techniques and Applications
- Thermal properties of materials
- Tribology and Wear Analysis
- Additive Manufacturing and 3D Printing Technologies
- Polymer composites and self-healing
- Nanopore and Nanochannel Transport Studies
- Fuel Cells and Related Materials
- Gas Sensing Nanomaterials and Sensors
- Surface Modification and Superhydrophobicity
- Electrochemical sensors and biosensors
- Advanced Electron Microscopy Techniques and Applications
- Covalent Organic Framework Applications
- Thermal Radiation and Cooling Technologies
- Semiconductor materials and interfaces
- Metal and Thin Film Mechanics
- Advanced battery technologies research
Tel Aviv University
2017-2025
American Institute of Aeronautics and Astronautics
2013-2023
Massachusetts Institute of Technology
2013-2019
Weizmann Institute of Science
2009-2013
Centre National de la Recherche Scientifique
2009
Here, we quantify the electron transport properties of aligned carbon nanotube (CNT) networks as a function CNT length, where electrical conductivities may be tuned by up to 10× with anisotropies exceeding 40%. Testing at elevated temperatures demonstrates that have negative temperature coefficient resistance, and application fluctuation induced tunneling model leads an activation energy ≈14 meV for CNT-CNT junctions. Since is shown independent both length orientation, variation in...
We study the strain-induced shift of D* Raman band single-wall carbon nanotubes in polyvinyl alcohol−nanotube composite fibers. If embedded structural components, such strain-sensitive fibers may be considered for potential applications as strain or stress sensors. Due to improved interfacial adhesion, stronger shifts are observed when carboxylic functional groups present at nanotube surface. This indicates that carboxylation would yield better efficacy future sensing applications. However,...
Carbon nanotube (CNT) reinforced polymers are next-generation, high-performance, multifunctional materials with a wide array of promising applications. The successful introduction such is hampered by the lack quantitative understanding process-structure-property relationships. These relationships can be developed only through detailed characterization nanoscale reinforcement morphology within embedding medium. Here, we reveal three-dimensional (3D) high volume fraction (V(f)) aligned...
We reported a high performance hybrid asymmetric supercapacitor based on tailored electrodes.
Room temperature resistive volatile organic compound (VOC) sensing materials fabricated with vertically aligned-carbon nanotubes (VA-CNT) demonstrated 10-fold improved sensitivity upon application of a thin conformal layer the conducting polymer coating ((poly(3,4-ethylenedioxythiophene) (PEDOT)). The PEDOT was directly synthesized on VA-CNTs via oxidative chemical vapor deposition (oCVD). Conformal coatings thickness 8 and 17 nm were easily achievable by oCVD. hybrid VA-CNT/oCVD exhibited...
Aligned Carbon nanotubes (A‐CNT) based electrodes have emerged as high‐performance elements in electric energy storage and conversion devices. Morphological tailoring of conformal coatings poly(ethylenedioxythiophene) (PEDOT) conductive polymer (CP) on the A‐CNT scaffold is demonstrated by controlling CP thickness at nm scale. Results show that nano‐films dominate electrode capacitance a supercapacitor application, contributing much 10x (pseudo)capacitance over double layer pristine due to...
United States. Dept. of the Navy. Small Business Innovation Research (Contract N68335-11-C-0424)
Abstract Conductive elastomer composites can be used as flexible, lightweight, and inexpensive sensors, but they require ohmic electrical contacts to ensure readout consistency, such suffer from hysteresis, non‐ohmic behavior, cyclic fatigue. This work investigates a common cause of conduction in composite contacts, namely the thin insulating layer native surface most silicone rubber that have been infused with multi‐walled carbon nanotubes for piezoresistive sensing. Voltage sweep dc...
Here we present a study on the presence of physisorbed water surface aligned carbon nanotubes (CNTs) in ambient conditions, where wet CNT array mass can be more than 200% larger that dry CNTs, and modeling indicates layer >5 nm thick outer surface. The experimentally observed nonlinear non-monotonic dependence adsorbed packing (volume fraction) originates from two competing modes. Physisorbed cannot neglected design fabrication materials devices using nanowires/nanofibers, especially further...
Abstract WS 2 inorganic nanotubes (WS -NT) have been incorporated into Polylactic Acid (PLA) by melt mixing to create a bio-degradable, mechanically reinforced nanocomposite filament. The filament was then processed Fused Filament Fabrication (FFF) 3D-printer, and the morphology characteristics before after printing were compared. We found that addition of -NT PLA extrusion increases elastic modulus, yield strength strain-at-failure 20%, 23% 35%, respectively. Moreover, we process itself...
Tomography derived nanoscale 3D morphological information is combined with modeling and simulation to explain anisotropy scaling of experimental mechanical, thermal, electrical properties aligned carbon nanotube polymer composites.
In this study, a reactive adsorbent filler was integrated into polymeric matrix as novel protective barrier without undermining its mechanical, thermal, and chemical properties. For purpose, newly synthesized TiO2/MCM/polydimethylsiloxane (PDMS) composites were prepared, their various properties thoroughly studied. The filler, TiO2/MCM, is based on (45 wt%) TiO2 nanoparticle catalyst inside the pores of ordered mesoporous silica, MCM-41, which combines high adsorption capacity catalytic...
This paper introduces a pioneering approach that combines ex situ synthesis with advanced manufacturing to develop ZIF-67-PA12 Nylon composites mixed-matrix membranes (MMMs), the goal of enhancing hydrogen storage systems. One method involves producing MOF-PA12 composite powders through an in process, which is then commonly used as base powder for bed fusion (PBF) fabricate various structures. However, developing matrix presents challenges, including limited spreadability and processability...
Composites of poly(l-lactic acid) (PLLA) reinforced by adding inorganic nanotubes tungsten disulfide (INT–WS2) were prepared solvent casting. In addition to the pristine nanotubes, PLLA nanocomposites containing surface modified studied as well. Several surface-active agents, including polyethylene imine (PEI), in this context. addition, other biocompatible polymers, like poly d,l-lactic acid (PDLLA) and others considered combination with INT–WS2. The added polymer different proportions up 3...