Materials Literature
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Nanofiber web mass produced via electrospinning has many potential applications due to its large specific area, very small pore size, high porosity and so forth. Despite these potentials, the application of nanofiber web has been limited by its poor mechanical properties. To remedy these poor mechanical properties, la…
In situ synchrotron and neutron diffraction were used to study deformation mechanisms in Ni over a broad range of grain sizes. The experimental data show that unlike in coarse-grained metals, where the deformation is dominated by dislocation slip, plastic deformation in nanocrystalline Ni is mediated by grain-boundary…
Cotton fabric surface was treated with combinations of silica nanoparticles, silane hydrophobes, and silane crosslinkers to obtain durable hydrophobicity. Performance analysis was done by measuring the contact angle of water on the treated fabric surface. To evaluate the durability of the surface hydrophobicity, AATCC…
guided waves based on pencil lead break actuation scanning and compressed sensing Qiyu Ding, Shaoping Zhou, Zhi Luo et al.
Determining how analytes are sequestered into thin films is important for solid-state sensors that detect the presence of the analyte by oxidative luminescence quenching. We show that thin (230 +/- 30 A) and thick (750 +/- 50 A) films of a first-generation dendrimer comprised of 2-ethylhexyloxy surface groups, bipheny…
Catch and release: Bridged silsesquioxanes act as organic–inorganic precursors for nanospheres to encapsulate bioactive molecules for drug-delivery applications. The nanosystems (see picture) are constructed from an liposomal core containing bioactive molecules and an network shell formed by silica and organic ester f…
The application of transparent single-walled carbon nanotube (SWCNT) electrodes in rigid and flexible alternating current electroluminescence (ACEL) devices is demonstrated. SWCNT thin-film electrodes (50-160 nm) were made using a spray-coating process suitable for adjusting the transparency and sheet resistance. The…
The exact exchange of density functional theory is used to calculate the electronic structure of the antiferromagnetic (type II) phases of the transition-metal monoxides MnO, FeO, CoO, and NiO at T=0. In contrast with the local density approximation (LDA) and generalized gradient approximation, the exact exchange (com…
The treatment of a suspension of graphite oxide (GO) with sodium azide leads to a material that, after reduction, features amino groups at the top and bottom of the sheets. These groups react through microcontact printing with an isothiocyanate monolayer on a silicon oxide substrate to form covalent bonds that strongl…
A systematic first-principle study is conducted to calculate bulk modulus, elastic constants, phonon-dispersion curves, and electronic structures of ${\text{CeO}}_{2}$, ${\text{ThO}}_{2}$, and their ordered binary alloys ${\text{Ce}}_{x}{\text{Th}}_{8\ensuremath{-}x}{\text{O}}_{16}$ with $x=1$, 2, 4, 6, and 7 using lo…
Polyacrylamide gel electrophoresis (PAGE) is used to separate the component of the glutathione protected gold clusters up to Au 160 core size and compare the size with the mobility data from PAGE. Both electrospray mass spectrometry and transmission electron microscopy were systematically applied to analyze Au−glutath…
SUMMARY: Applications of nanotechnology to medicine are leading to novel means of imaging living systems and of delivering therapy. Much nanotechnology research is focused on methods for imaging central nervous system functions and disease states. In this review, the principles of nanoparticle design and function are…
Water-dispersible gold nanoparticles with narrow size distributions were prepared by irradiation of nonequilibrium atmospheric-pressure dielectric-barrier-discharge (DBD) helium plasma jets to tetrachloroauric acid solutions containing poly(ethylene glycol) (PEG) that had a pentaethylenehexamine at one end of each pol…
We report a spectroscopic study of highly photostable individual CdSe/ZnS colloidal nanocrystals. At low temperature, photoluminescence spectra display two sharp zero-phonon lines which we attribute to the radiative recombination from the two lowest levels of the band-edge exciton fine structure. For the first time, r…
Single crystals of SrFe2As2 grown using a self-flux solution method were characterized via x-ray, transport, and magnetization studies, revealing a superconducting phase below Tc=21 K characterized by a full electrical resistivity transition and partial diamagnetic screening. The reversible destruction and reinstateme…
Abstract Cellulose nanoparticles obtained by acid hydrolysis of cellulose paper were used to reinforce polystyrene composite films. The nonionic surfactant sorbitan monostearate was utilized to improve the dispersion properties of the hydrophilic cellulose in hydrophobic matrix and to prevent the formation of aggregat…
The present paper reports a very simple and low-cost fluorine-free superhydrophobic coating prepared by spray-coating metal alkylcarboxylates, for example, Cu[CH(3)(CH(2))(10)COO](2), onto virtually any substrates. Superhydrophobicity with a static water contact angle of about 160 degrees and a sliding angle of 5 degr…
In this study, we describe synthesis, characterization, and zipper assembly of yellow p-oligophenyl naphthalenediimide (POP-NDI) donor-acceptor hybrids. Moreover, we disclose, for the first time, results from the functional comparison of zipper and layer-by-layer (LBL) assembly as well as quartz crystal microbalance (…
The electrical potential on the surface of $\sim 300$ nm thick SiO$_2$ grown on single crystalline Si substrates has been characterized at ambient conditions using electric field microscopy. Our results show an inhomogeneous potential distribution with fluctuations up to $\sim 0.4 $V within regions of $1 μ$m. The pote…
The fiber bundle model describes a collection of elastic fibers under load. the fibers fail successively and for each failure, the load distribution among the surviving fibers change. Even though very simple, the model captures the essentials of failure processes in a large number of materials and settings. We present…