The complete Raman spectrum of nanometric SnO2 particles
نویسندگان
چکیده
منابع مشابه
Tip Characterization from AFM Images of Nanometric Spherical Particles
Since atomic force microscopy (AFM) images are a composite of probe and sample geometry, accurate size determinationsareproblematic. A relatively straightforwardmathematical procedure for determining tip radius of curvature (RT) for an asymmetrical tip was recently developed by Garcia et al. (ProbeMicrosc. 1997, 1, 107). This study represents an experimental test of that procedure for both sili...
متن کاملLow-Temperature Magnetic Properties of Nanometric Fe-Based Particles
Fe-based nanoparticles were prepared by laser-driven pyrolysis. The assynthesised powder consists of α-Fe and Fe3O4/γ-Fe2O3 nanoparticles embedded in a pyrolytic carbon matrix. The crystallite size of 1.8 nm for α-Fe was calculated using the Scherrer formula. The as-synthesised nanopowder was superparamagnetic. The maximum of the zero-field cooling curve was observed at 32 K and the distributio...
متن کاملThe Raman spectrum of isolated water clusters.
Cold water oligomers (H2O)n and (D2O)n with n = 2-5 are assigned in spontaneous Raman scattering spectra of seeded rare gas expansions for the first time. Comparison with infrared spectra provides direct experimental insights into the hydrogen bond-mediated excitonic OH oscillator coupling, which is responsible for ultrafast energy transfer between water molecules, usually suppressed by isotopi...
متن کاملRaman Spectrum of silicon nanowires
We measure the effects of phonon confinement on the Raman spectra of silicon nanowires (SiNWs). We show how previous reports of phonon confinement in SiNWs and nanostructures are actually inconsistent with phonon confinement, but are due to the intense local heating caused by the laser power used for Raman measurements. This is peculiar to nanostructures, and would require orders of magnitude h...
متن کاملThe Complete Spectrum of the WN String
We obtain the complete physical spectrum of the W N string, for arbitrary N. The W N constraints freeze N − 2 coordinates, while the remaining coordinates appear in the currents only via their energy-momentum tensor. The spectrum is then effectively described by a set of ordinary Virasoro-like string theories, but with a non-critical value for the central charge and a discrete set of non-standa...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Journal of Applied Physics
سال: 2001
ISSN: 0021-8979,1089-7550
DOI: 10.1063/1.1385573