A5041556229- Gold and Silver Nanoparticles Synthesis and Applications
- Nanomaterials for catalytic reactions
- Electrocatalysts for Energy Conversion
- Nanocluster Synthesis and Applications
- Quantum Dots Synthesis And Properties
- Copper-based nanomaterials and applications
- Catalytic Processes in Materials Science
- Electrospun Nanofibers in Biomedical Applications
- Nanoplatforms for cancer theranostics
- Nanofabrication and Lithography Techniques
- nanoparticles nucleation surface interactions
- Photoacoustic and Ultrasonic Imaging
- Photonic Crystals and Applications
- Nanoparticle-Based Drug Delivery
- Advanced biosensing and bioanalysis techniques
- Molecular Junctions and Nanostructures
- Advanced Sensor and Energy Harvesting Materials
- Pickering emulsions and particle stabilization
- Plasmonic and Surface Plasmon Research
- Nanomaterials and Printing Technologies
- Conducting polymers and applications
- Laser-Ablation Synthesis of Nanoparticles
- Innovative Microfluidic and Catalytic Techniques Innovation
- Fuel Cells and Related Materials
- Advanced Photocatalysis Techniques
Georgia Institute of Technology
2016-2025
The Wallace H. Coulter Department of Biomedical Engineering
2016-2025
Emory University
2012-2025
Wenzhou Medical University
2025
Anhui University of Technology
2025
The University of Texas at Austin
2007-2023
AID Atlanta
2015-2020
Washington University in St. Louis
2007-2016
Parker Hannifin (United States)
2016
University of Washington
2003-2014
Monodisperse samples of silver nanocubes were synthesized in large quantities by reducing nitrate with ethylene glycol the presence poly(vinyl pyrrolidone) (PVP). These cubes single crystals and characterized a slightly truncated shape bounded [100], [110], [111] facets. The PVP its molar ratio (in terms repeating unit) relative to both played important roles determining geometric size product. could serve as sacrificial templates generate single-crystalline nanoboxes gold: hollow polyhedra...
Abstract Soft lithography represents a non-photolithographic strategy based on self-assembly and replica molding for carrying out micro- nanofabrication. It provides convenient, effective, low-cost method the formation manufacturing of nanostructures. In soft lithography, an elastomeric stamp with patterned relief structures its surface is used to generate patterns feature sizes ranging from 30 nm 100 μm. Five techniques have been demonstrated: microcontact printing (μCP), (REM),...
Extending Platinum Catalysts performs extremely well as a catalyst for the oxygen-reduction reaction that runs under highly acidic conditions in proton-exchange membrane fuel cells, but is expensive. One strategy reducing costs to increase surface area of platinum. Lim et al. (p. 1302 , published online 14 May) describe simple chemical route, which Pt ions solution are reduced onto Pd seed crystals, creates faceted nanocrystals with high owing their dendritic architecture. On mass basis,...
We have recently demonstrated an approach based on the polyol process for large-scale synthesis of silver nanowires with uniform diameters (see Sun, Y.; Gates, B.; Mayers, Xia, Y. Nano Lett. 2002, 2, 165. Adv. Mater. 14, 833. Yin, B. T.; Herricks, Chem. 4736). Although capability and feasibility this method been successfully illustrated production 30−60 nm in diameter 1−50 μm length, growth mechanism is yet to be elucidated. Here we report some progress matter: First, electron microscopy...
This paper describes a soft, solution-phase approach to the large-scale synthesis of uniform nanowires bicrystalline silver whose lateral dimensions could be controlled in range 30−40 nm, and lengths up ∼50 μm. The first step this procedure involved formation platinum nanoparticles by reducing PtCl2 with ethylene glycol heated ∼160 °C. Due their close match crystal structure lattice constants, these serve as seeds for heterogeneous nucleation growth that was produced solution via reduction...
Electrospinning has been applied to prepare uniaxially aligned nanofibers made of organic polymers, ceramics, and polymer/ceramic composites. The key the success this method was use a collector consisting two pieces electrically conductive substrates separated by gap whose width could be varied from hundreds micrometers several centimeters. As driven electrostatic interactions, charged were stretched span across thus become arrays over large areas. Because suspended gap, they conveniently...
A solution-phase approach has been demonstrated for the large-scale synthesis of silver nanowires with diameters in range 30−40 nm, and lengths up to ∼50 μm. The first step this process involved formation Pt (or Ag) nanoparticles by reducing PtCl2 AgNO3) ethylene glycol (EG) heated ∼160 °C. These could serve as seeds heterogeneous nucleation growth (formed AgNO3 EG) because their close match crystal structure lattice constants. In presence poly(vinyl pyrrolidone) (PVP), be directed into a...
Noble-metal nanocages comprise a novel class of nanostructures possessing hollow interiors and porous walls. They are prepared using remarkably simple galvanic replacement reaction between solutions containing metal precursor salts Ag through polyol reduction. The electrochemical potential difference the two species drives reaction, with reduced depositing on surface nanostructure. In our most studied example, involving HAuCl(4) as precursor, resultant Au is deposited epitaxially nanocubes,...
In this work, we use dark-field microscopy to observe a new plasmon resonance effect for single silver nanocube in which the line shape has two distinct peaks when particles are located on glass substrate. The dependence of size and is characterized, it found that bluer peak higher figure merit chemical sensing applications than other particle shapes have been studied previously. Comparison measured results with finite difference time domain (FDTD) electrodynamics calculations enables us...
Langmuir−Blodgett technique was used to assemble monolayers (with areas over 20 cm2) of aligned silver nanowires that are ∼50 nm in diameter and 2−3 μm length. These possess pentagonal cross-sections pyramidal tips. They close-packed parallel each other. The resulting nanowire serve as excellent substrates for surface-enhanced Raman spectroscopy (SERS) with large electromagnetic field enhancement factors (2 × 105 thiol 2,4-dinitrotoluene, 2 109 Rhodamine 6G) can readily be ultrasensitive,...
Hollow nanofibers with walls made of inorganic/polymer composites or ceramics have been prepared by electrospinning two immiscible liquids through a coaxial, two-capillary spinneret, followed selective removal the cores. The capability and feasibility this technique demonstrated fabrication titania/polymer anatase nanotubes whose size wall thickness could be independently varied controlling set experimental parameters. presence sol−gel precursor in sheath liquid was necessary for formation...
A self-seeding process is used to generate bicrystalline silver nanowires by reducing AgNO3 with ethylene glycol at ∼160 °C. The key the success of this solution-phase approach use a polymeric "coordination reagent" capable controlling growth rates different faces silver. Uniform (see Figure) could be routinely synthesized diameters ∼60 nm and lengths up ∼50 μm.
This paper describes a procedure based on electrospinning for generating nanofibers of anatase with controllable diameters and porous structures. When an ethanol solution containing both poly(vinyl pyrrolidone) (PVP, Mw ≈ 1 300 000) titanium tetraisopropoxide was injected through needle under strong electrical field, composite made PVP amorphous TiO2 were formed (with lengths up to several centimeters) as result electrostatic jetting. These could be subsequently converted into without...
Mastery over the shape of a nanostructure enables control its properties and usefulness for given application. By controlling crystallinity seeds from which nanostructures grow rate atomic addition to seeds, we selectively produced pentagonal nanowires, cuboctahedra, nanocubes, nanobars, bipyramids, nanobeams silver with solution-phase polyol synthesis. The example nanobars illustrates how affects color light that it scatters. We further show nanowires can serve as conduits both electrons photons.