Abstract Alumina is a material that has been used in both dental and orthopedic applications. It with these uses mind osteoblast (bone‐forming cell) function on alumina of varying particulate size, chemistry, phase was tested order to determine what formulation might be the most beneficial for bone regeneration. Specifically, vitro adhesion, proliferation, intracellular alkaline phosphatase activity, calcium deposition observed delta‐phase nanospherical, alpha‐phase conventional spherical,...

The electronic spectroscopy of UO(2) has been examined using multiphoton ionization with mass-selected detection the (+) ions. Supersonic jet cooling was used to reduce spectral congestion. Twenty-two vibronic bands neutral were observed in range from 17,400 32,000 cm(-1). These originated U(5fphi(u)7ssigma(g))O(2) X (3)Phi(2u) and (3)Phi(3u) states. stronger band systems are attributed metal-centered 7p<--7s transitions. Threshold measurements determine potentials UO UO(2). found be higher...

The pulsed field ionization–zero kinetic energy photoelectron technique has been used to observe the low-lying levels of UO+. Rotationally resolved spectra were recorded for ground state and first nine electronically excited states. Extensive vibrational progressions characterized. Ω+ assignments unambiguously determined from rotational lines identified in each vibronic band. Term energies, frequencies, anharmonicity constants UO+ are reported. In addition, accurate values ionization...

Accurate ionization potential (IP) measurements provide essential thermodynamic information and benchmark data that can be used to evaluate the validity of electronic structure models. Calculations first IP UO2 using relativistic methods consistently predict values are approximately 0.7 eV higher than accepted experimental value. The present validate theoretical calculations show previous determinations corresponded thermally excited molecules. Similarly, new for UO currently value is too...

The ionization energy (IE) for ThO has been determined using photoionization efficiency and mass-analyzed threshold measurements. An IE of 6.6038(12) eV was obtained, which appreciably higher than the result from previous appearance potential measurements [6.1(1) eV]. revised is 0.3 greater that atomic Th, indicating neutral more tightly bound ThO(+). one-color two-photon resonant spectrum examined in range 315-370 nm. Rotationally resolved bands were recorded three new electronic states...

The pristine point of zero charge (p.p.z.c) and zeta potential as a function pH boehmite oxide/hydroxide (α-Al2O3·H2O) have been determined for three filter media. active component in the first two media is nanofibers, only 2 nm diameter about 300 long. Boehmite nanofibers create high (ζtrue≥46 mV) aqueous solutions range 3–8. p.p.z.c. values were to be 11.60 ± 0.15 grafted onto microglass fibers 11.40 agglomerated nanofibers. In third media, nanolayer form monocrystalline with thickness...

Wavelength-resolved fluorescence excitation techniques have been used to record eight electronic transitions of LaF at a resolution 0.03 cm−1. With few exceptions, Ω assignments were unambiguously determined from observations the first lines in least two rotational branches. Accurate term energies and constants are reported. Ligand field-theory calculations hyperfine suggest configurational for excited states LaF.

We present secondary ion mass spectrometry (SIMS) data obtained from the bombardment of a novel nanomaterial with suite projectiles: Au1+, Au3+, Au9+, and Au4004+. These are first experiments where free-standing nano-objects were bombarded kiloelectronvolt projectiles atomic to nanoparticle size (Au4004+). The objects aluminum monohydrate nanowhiskers, identified as crystalline boehmite (AlOOH) using X-ray diffraction. nanoalumina is bonded microglass fiber that serves scaffold. largest...

The rotational structure of six bands the TbO molecule, including 0–0 electronic transitions III, IV, and V, was analyzed using laser excitation spectroscopy with selective fluorescence detection. From spectra obtained through selected lines in these bands, energies 14 low-lying Ω states as well ΔG 1/2 values for four lowest were determined. constants B D found each, state upper bands; an energy linkage all transitions, whose has been analyzed, is established. ground are (2σ—uncertainty...

Emission and absorption spectra of NdO have been obtained in the 500–1100 nm region. Vibrational rotational analyses carried out. The analysis shows that there are at least 4 low-lying states which give rise to bands. observed Λ-type doubling has interpreted by theoretical formula produced for intermediate case between Hund’s a) b) a5 Π state. anomalous high values opposite sign centrifugal constantsD explained heterogeneous perturbations.

Spray combustion tests of gaseous oxygen atomized sprays RP-1 gel propellants with ultra-fine aluminum particles were performed in a rocket engine. The addition to has the potential significantly increase heat reaction over neat due high volumetric energy release aluminum. Alex® powders, which have an average particle size 100 nanometers, are formed by exploding wires. use these nano-sized can, theoretically, lead more complete combustion, and thus, performance increases such as higher flame...

Secondary ion mass spectrometry (SIMS) run in the event-by-event bombardment/detection mode provides a unique ability to obtain molecular information from single nano-objects, since assays are based on secondary coemission impacts. The characterization of individual nano-objects is demonstrated with negatively charged polymer spheres that attracted and retained by nanoalumina whiskers. whiskers, 2 nm diameter approximately 250 length, grafted microglass fiber an average 0.6 microm several...