Room-temperature homogeneous nucleation synthesis and thermal stability of nanometer single crystal CeO2

Abstract

Nanometer (about 4∼5 nm) CeO2 single crystals were first synthesized by room-temperature homogeneous nucleation; the size was determined by electron microscopy and specific surfaced area of the particles. Modeling revealed that the surface energy of as-synthesized nanometer single crystals was in the range of 2.8–3.7 J/m2. Crystal growth mechanisms change over the temperature regimes, from boundary diffusion over low-temperature regime (Ea=0.16 eV) to bulk diffusion (Ea=0.50 eV) over high-temperature region.

Enhancement of radiotherapy by ceria nanoparticles modified with neogambogic acid in breast cancer cells

“…[22][23][24] Briefly, surfactant sodium bis(2-ethylhexyl) sulfosuccinate was dissolved in 100 mL toluene, followed by the addition of 5 mL of 0.1 M aqueous cerium nitrate solution. The reaction mixture was stirred for 45 minutes before 10 mL of 1.5 M ammonium hydroxide aqueous solution was added dropwise.…”

Surfactant-assisted formation of organophilic CeO2 nanoparticles

“…Photoluminescence emission spectra of dispersions in methyl methacrylate were determined in a Varian Cary Eclipse Fluorescence spectrophotometer by exciting at 250 nm and observing the emission between 300 and 450 nm. 13 C cross-polarization (CP) magic-angle spinning (MAS) nuclear magnetic resonance (NMR) spectra were recorded in a Bruker Avance spectrometer at 100.6 MHz 13 C Larmor frequency. All CP-MAS spectra have been recorded with 1 s recycle delay, 2 ms CP contact time, 100 kHz RF nutation frequency for proton and carbon (2.5 s for 90 • pulse length), at ∼9 kHz MAS frequency, and by using the TPPM scheme for proton decoupling.…”

“…The synthesis methods require hard conditions at extreme temperature and pressure; they are also still limited in the amount of nanoparticles. However, chemical precipitation provides a promising pathway for large scale production of nanosized particles at ambient conditions [11][12][13].…”

Effect of Alkali Metal Hydroxides on the Morphological Development and Optical Properties of Ceria Nanocubes Under Hydrothermal Conditions

“…7 8 Moreover, ceria has gained much attention for development of ultraviolet (UV) absorbent material, its absorption at about 400 nm being the strongest among all oxides. 9 Several techniques including hydrothermal, 10 11 reversemicellular, 12 sonochemical, 13 and those involving homogeneous precipitation 14 have been used for the preparation of * Authors to whom correspondence should be addressed.…”