A5071874115- Carbon Nanotubes in Composites
- Graphene research and applications
- Surface and Thin Film Phenomena
- Electron and X-Ray Spectroscopy Techniques
- Nanofabrication and Lithography Techniques
- Quantum and electron transport phenomena
- 2D Materials and Applications
- Semiconductor materials and devices
- MXene and MAX Phase Materials
- Force Microscopy Techniques and Applications
- Semiconductor Quantum Structures and Devices
- Nanowire Synthesis and Applications
- Advanced Sensor and Energy Harvesting Materials
- Neuroscience and Neural Engineering
- Molecular Junctions and Nanostructures
- Nanotechnology research and applications
- Physics of Superconductivity and Magnetism
- ZnO doping and properties
- Semiconductor materials and interfaces
- Advanced Thermoelectric Materials and Devices
- Boron and Carbon Nanomaterials Research
- Diamond and Carbon-based Materials Research
- Silicon and Solar Cell Technologies
- Integrated Circuits and Semiconductor Failure Analysis
- Advanced Electron Microscopy Techniques and Applications
Saint Louis University
2016-2024
Argonne National Laboratory
2018
UCLouvain Saint-Louis Brussels
2012-2016
Saint Louis University
2013
Michigan State University
2003-2013
Northwestern University
2008-2011
Harvard University Press
2007
Harvard University
2007
Semiconductor GaN NWs are promising components in next generation nano- and optoelectronic systems. In addition to their direct band gap, they exhibit piezoelectricity, which renders them particularly attractive energy harvesting applications for self-powered devices. Nanowires often considered as one-dimensional nanostructures; however, the electromechanical coupling leads a third rank tensor that wurtzite crystals (GaN NWs) possesses three independent coefficients, d(33), d(13), d(15)....
Owing to their exceptional physical, chemical, and mechanical properties, carbon nanotubes (CNTs) have been extensively studied for effect on cellular behaviors. However, little is known about the process by which cells attach spread CNTs cell attachment spreading individual single-walled has not studied. Cell adhesion essential communication regulation interaction between underlying substrate can influence control behavior function. A limited number of studies described different...
Antiprotons (p¯) remain confined in a Penning trap, sufficient numbers to form antihydrogen (H¯) atoms via charge exchange, when the radial field of quadrupole Ioffe trap is added. This first demonstration with p¯ suggests that traps can be superimposed upon and e+ attempt capture H¯ as they form, contrary conclusions previous analyses.Received 19 December 2006DOI:https://doi.org/10.1103/PhysRevLett.98.113002©2007 American Physical Society
Abstract Last several decades have sparked a tremendous interest in mechanical properties of low dimensional systems specifically 1D and 2D nanomaterials, large, due to their remarkable behavior potential possess unique customizable physical properties, which encouraged the fabrication new structures be tuned utilized for targeted applications. In this critical review we discuss examples that represent evolution characterization techniques developed with special emphasis on specimen...
Carbon nanotubes are fabricated using chemical vapor deposition at predetermined locations by patterning catalyst directly on a substrate with nanometer-scale precision dip-pen nanolithography multipen cantilevers (see image). The development of new molecular inks for the precursor results in high yield isolated carbon nanotubes, ideal subsequent device fabrication.
A novel and advanced approach of growing zinc oxide nanowires (ZnO NWs) directly on single-walled carbon nanotubes (SWCNTs) graphene (Gr) surfaces has been demonstrated through the successful formation 1D–1D 1D–2D heterostructure interfaces. The direct two-step chemical vapor deposition (CVD) method was utilized to ensure high-quality materials’ synthesis scalable production different architectures. Iron-based universal compound molecular ink used as a catalyst in both processes (a) form...
Dispersion of high quality carbon nanotubes (CNTs) in aqueous solutions is central importance for their potential biological and biomedical applications. Although it now possible to obtain highly dispersed CNT by means surfactant assisted processing, organic functionalization, mechanical mixing, a concern remains about preservation CNTs' during these dispersion procedures. In this report, the authors demonstrate that employing Raman spectroscopy, one can study changes post-dispersion....
Carbon nanotube (CNT)‐hydrogel nanocomposites are beneficial for various biomedical applications, such as nerve regeneration, tissue engineering, sensing, or implant coatings. Still, there impediments to developing nanocomposites, including attaining a homogeneous CNT‐polymer dispersion patterning CNTs on hydrogels. While few approaches have been reported polymeric substrates, these methods include high temperature, vacuum utilize sacrificial layer and, hence, incompatible with hydrogels...
The electronic model of the kinetics carbon nanotube growth catalyzed by metal nanoparticles has been presented in this study using electron theory catalysis and d-band model. This takes into account weak strong chemisorption species on surface catalysts, determined position Fermi level catalysts with respect to antibonding states intermediates. fractions 'weak' 'strong' chemisorbed participating adsorption, decomposition, diffusion, incorporation processes are shown define rate as a...
The mask-free patterning technique is employed to fabricate arrays of MoS2 and WS2 structures on silicon graphene substrates with quality interfaces. By depositing precursor inks the AFM cantilevers subsequent heat treatment in CVD furnace, it demonstrated that can be formed surfaces at predefined device architectures. As a service our authors readers, this journal provides supporting information supplied by authors. Such materials are peer reviewed may re-organized for online delivery, but...
In this work the role of catalysts in SWCNT chirality selection is considered via optimization chemisorption strength between carbon species and catalyst surface needed to achieve stable nucleation fast growth rates.
We demonstrate a scalable production of quality WS<sub>2</sub>/MoS<sub>2</sub> vertical and lateral heterostructures with controlled geometries employing bottom-up direct writing approach.
The authors report on fabrication and characterization of thin ZnO microribbons with controlled geometry produced different substrates via direct-write patterning (DWP) approach. A two-step process was employed to produce patterns microribbons. DWP Fe-catalytic ink subsequent chemical vapor deposition synthesis utilized in the It found that iron-catalytic promoted formation nanostructures at patterned locations. High-quality were fabricated optimized parameters growth conditions. ability...
This work reports on a novel mask-free approach that enables controlled selective growth of molybdenum disulfide (MoS2) and tungsten (WS2) crystalline islands Si/SiO2 substrates. In particular, the direct-write patterning technique chemical vapor deposition method are employed to produce arrays 2D-TMDCs nanostructures at pre-defined locations It is shown by adjusting parameters, composition concentrations ink-precursors, conditions, patterns MoS2 WS2 with geometry can be produced. The...
We have developed a modeling method suitable for analyzing single- and multiple-electron resonances detected by electric-field-sensitive scanning probe techniques. The is based on basic electrostatics numerical boundary-element approach. results compare well to approximate analytical expressions experimental data.
Recent studies have shown the wide array of biomedical applications for nanomaterials such as single-walled carbon nanotubes (SWCNTs) and zinc oxide nanowires (ZnO NWs). SWCNTs are non-cytotoxic a varying range mechanical, physical, electrical properties useful to research. ZnO NWs biocompatible, antibacterial, exhibit piezoelectric that could stimulate cell growth. While recent research has been conducted using these independently, our study is focused on testing behaviors when seeded...
Mechanical properties of large area suspended few-layer graphene/boron nitride/polymer heterostacks are studied here with local, (AFM-assisted) and non-local (tensile testing) approaches complemented by finite element simulations.
Abstract Antihydrogen (Hbar) was first produced at CERN in 1996. Over the past decade our ATRAP collaboration has made massive progress toward goal of producing large numbers cold Hbar atoms that will be captured a magnetic gradient trap for precise comparison between atomic spectra matter and antimatter. The AD provides bunches 3 × 10 7 low energy Pbars every 100 seconds. We capture cool to 4 K, 0.1% these cryogenic Penning trap. By stacking many we are able do experiments with 5 Pbars....