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JUDYTA CIELECKA‐PIONTEK PRZEMYSŁAW ZALEWSKI PIOTR GARBACKI EWELINA JURA ALICJA TALACZYŃSKA 《国际化学动力学杂志》2014,46(8):443-450
The kinetic and thermodynamic analysis of biapenem degradation was conducted during acid–base hydrolysis, under the influence of buffer components and in the solid state at increased temperature (dry air) and relative air humidity (RH > 50%). The effects of the initial concentration of biapenem and the formation of degradation products on its stability were investigated. 相似文献
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Dense-packed CdSe nanoclusters synthesized by sequential ion implantation of Cd+ and Se+ in thermally grown SiO2 are subjected to high electric field strengths in a metal oxide semiconductor (MOS) structure. The nanocrystal-containing device shows efficient CdSe band-edge photoluminescence (PL) when excited by a cw-HeCd laser operating at a wavelength of 442 nm at room temperature. An effective PL quenching and enhancement has been observed. Depth-resolved μ-PL measurements reveal an exponential decrease, which is depth-correlated with a layer of nanoparticles near the surface, whereas the optical non-linearity of the PL increases in parallel. The PL spectra and particle size distribution suggest an energy transfer from the nanoscopic to adjacent large particles. It can be concluded from these results that charge injection into the near-surface region of the nanocluster/SiO2 system might be the reason for the asymmetric and hysteretic electro-optic response. 相似文献