نتایج جستجو برای: potentiometry
تعداد نتایج: 516 فیلتر نتایج به سال:
Charge transport in 20–30-Å-thick Bi films is studied by scanning tunneling potentiometry at room temperature. Deposition at T5140 K onto InP-based multilayer substrates leads to flat and continuous films that are subjected to a lateral current density of up to 8310 A/cm. We find that scattering at surface defects and grain boundaries gives rise to discontinuities in the local electrochemical p...
The modulation of the ion-fluxes across a polymeric membrane is important for designing attractive methodologies. As an alternative to commonly used dynamic electrochemistry approaches, light can be as external stimulus and provides very convenient way manipulate ions release and/or extraction into membrane. Herein, we designed solid-contact ion-selective sensor that exhibits response by irradi...
The use of enzymes in analytical chemistry has gained tremendous attention during the last 2-3 decades. The obvious and straightforward reason has to do with the specificity of enzymatic reactions. In other words, by incorporating an enzyme-related step in the analytical cycle, someone can achieve high selectivity by using non-selective detection techniques (e.g. spectrophotometry, fluorescence...
We report a method for detecting microRNAs encapsulated in exosomes using a microelectrode array in semiconductor-based potentiometry after RT-PCR. The inherent miniaturization of the electrical biosensor meets requirements for massively parallel analysis of circulating microRNA as a noninvasive biomarker.
A fruitful combination of potentiometry, absorption spectrophotometry, ESMS and 1H NMR enabled the characterisation of two caesium complexes with norbadione A and the determination of the respective stability constants of a mononuclear and a dinuclear caesium complex at pH approximately 6; a preliminary study allowed the assignment of five protonation sites of this pigment; a positively coopera...
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