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51.
52.
Wang J Gründler P Flechsig GU Jasinski M Rivas G Sahlin E Paz JL 《Analytical chemistry》2000,72(16):3752-3756
A new electrically heated carbon paste electrode has been developed for performing adsorptive stripping measurements of trace nucleic acids. Such coupling of electrochemistry at electrically heated electrodes with adsorptive constant-current stripping chronopotentiometry offers distinct advantages for trace measurements of nucleic acids. The application of increased temperatures during the deposition step results in dramatic (4-34-fold, depending on temperature applied) enhancement of the stripping signal. Such improvement is attributed to the accumulation step at the heated electrode. Forced thermal convection near the electrode surface facilitates the use of quiescent solutions and hence of ultrasmall volumes. Using an electrode temperature of 32 degrees C and a quiescent solution during the 1-min accumulation, the response is linear over the 1-8 mg/L range tested, with a detection limit of 0.5 mg/L. Such electrode heating technology offers great promise for various applications involving thermal manipulations of nucleic acids. 相似文献
53.
Robert Lupitskyy Venkat Kalyan Vendra Jacek Jasinski Delaina A. Amos Mahendra K. Sunkara Thad Druffel 《Progress in Photovoltaics: Research and Applications》2015,23(7):883-891
An aqueous formulation containing commercially available P25 nanoparticles and a water‐soluble precursor—titanium (IV) bis(ammonium lactato)dihydroxide (TALH) has been developed and optimized for fabricating photoanodes in dye‐sensitized solar cells. An optimal formulation achieved a power conversion efficiency of 9.2%. Solar cell performance is significantly influenced by precursor concentration impacting the porosity and electron transport of the thin film. The use of TALH during processing is shown to enhance the electron transport in the resulting titanium dioxide nanoparticle network using transient decay measurements. Bridging between neighboring nanoparticles is confirmed using transmission electron microscopy explaining the enhanced electron transport. The developed formulation has several advantages, as it is water‐based, composed of inexpensive, non‐hazardous components, is easy to make, and does not require special handling. The formulation has great potential for industrial applications, in particular for DSC manufacturing using roll‐to‐roll technology. Copyright © 2014 John Wiley & Sons, Ltd. 相似文献