Nanotechnology

  2010 MAY 3 - (VerticalNews.com) -- According to recent research from Jena, Germany, "Three different glasses in the system Na2O/K2O/Al2O3/KF/BaF2/SiO2 were crystallized. After cooling, in one sample only cubic BaF2 was detected, in the second sample predominantly the orthorhombic modification was found, and in the third sample, both phases were present."

  "The orthorhombic phase according to the literature is thermodynamically stable only at high pressures. During crystallization, compressive stresses cannot relax and the orthorhombic phase is formed," wrote C. Bocker and colleagues, University of Jena ...read more

  2010 MAY 3 - (VerticalNews.com) -- "The kinetics of nanoparticle (NP) adsorption on a model biological interface (collagen) is measured in microfluidic channels using surface plasmon resonance (SPR) imaging over a range of CdSe/ZnS quantum dot concentrations to investigate the underlying binding process. Spherical CdSe/ZnS core-shell NP, derivatized with 3-mercaptopropionic acid (3-MPA). were considered to be model NPs because of their widespread use in biological applications and their relatively monodisperse size," scientists writing in the journal Langmuir report ...read more

  2010 MAY 3 - (VerticalNews.com) -- According to recent research published in the journal Nano Research, "A systematic experimental and theoretical investigation of the elastic and failure properties of ZnO nanowires (NWs) under different loading modes has been carried out. In situ scanning electron microscopy (SEM) tension and buckling tests on single ZnO NWs along the polar direction [0001] were conducted."

  "Both tensile modulus (from tension) and bending modulus (from buckling) were found to increase as the NW diameter decreased from 80 to 20 nm. The bending modulus increased more rapidly than the tensile modulus, which demonstrates that the elasticity size effects in ZnO NWs are mainly due to surface stiffening. Two models based on continuum mechanics were able to fit the experimental data very well. The tension experiments showed that fracture strain and strength of ZnO NWs increased as the NW diameter decreased," wrote F. Xu and colleagues, North Carolina State University ...read more