By Guozhong Cao, C. Jeffrey Brinker
The 1st quantity in a thrilling new sequence, "Annual overview of Nano Research", this bold choice of evaluate articles sees well known participants from 8 diversified international locations take on the newest advances in nanofabrication, nanomaterials and nanostructures. The extensive insurance of issues in nanotechnology and nanoscience additionally features a specific specialize in the recent subject of biomedical purposes of nanomaterials. the real names contributing to the amount comprise: M R Bockstaller (USA), L Duclaux (France), S Forster (Germany), W Fritzsche (Germany), L Jiang (China), C Lopez (Spain), W J Parak (Germany), B Samori (Italy), U S Schubert (The Netherlands), S Shinkai (Japan), A Stein (USA), S M Hou (China), and Y N Xia (USA). the quantity serves either as a convenient reference for specialists lively within the box and as an outstanding advent to scientists whose services lies somewhere else yet who're attracted to studying approximately this state of the art learn quarter.
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Additional resources for Annual review of nano research Volume 1
For CdZnSe/ZnSe quantum wires, resonance Raman spectroscopy revealed that the ZnSe-like LO phonon position depends on the Cd content as well as excitation wavelength due to relative intensity changes of the peak contributions of the wire edges and of the wire center . 3. Other Relevant Optical Properties: Chemiluminescence and Electroluminescence Besides optical absorption and emission, nanomaterials have other interesting optical properties such as chemiluminescence (CL) and electroluminescence (EL) that are of interest for technological applications such as chemical sensing and biochemical detection.
There are two practical problems that are often encountered in PL measurements: Raman scattering and high order Rayleigh scattering. Raman scattering from solvent molecules can show up as relatively strong signal in PL spectroscopy, especially when the PL intensity is low. For nanoparticles, PL speaks are generally broad for ensemble samples while Raman peaks are usually narrow. A simple diagnostic to verify that a peak is due to Raman scattering is by changing the excitation wavelength and observe if the peak shifts accordingly.
It is challenging to assign an exact mechanism from only experimental data. All these models can explain the observations reasonably well. We have favored the exciton-exciton annihilation model since Auger recombination involves ionization and most time-resolved studies do not provide direct evidence for charge ejection. In the exciton-exciton annihilation model, high excitation laser intensity for the pump pulse produces multiple excitons per particle that can interact and annihilate, resulting in one exciton doubly excited and another one de-excited.
Annual review of nano research Volume 1 by Guozhong Cao, C. Jeffrey Brinker