Pulse electroanalysis at gold-gold micro-trench electrodes: chemical signal filtering.
Pulse electroanalysis at gold-gold micro-trench electrodes: chemical signal filtering.
复制标题
金-金微沟槽电极的脉冲电解分析:化学信号过滤。
DOI:
10.1039/c3fd00022b
复制
发表时间:
2013
影响因子:
3.4
通讯作者:
Dale SE
中科院分区:
文献类型:
--
作者:
Dale SE
Bipotentiostatic control of micro- and nano-trench sensor systems provides new opportunities for enhancing signals (employing feedback currents) and for improved selectivity (by “chemical filtering”). In this study both phenomena are exploited with a gold–gold micro-trench electrode with ca. 70 μm width and ca. 800 μm trench depth. In “generator–collector mode”, feedback current enhancement is demonstrated for the hydroquinone/ benzoquinone redox system. Next, a “modulator-sensor mode” experiment is developed in which one electrode potential is stepped into the negative potential region (employing the normal pulse voltammetry method) to induce an oscillating pH change locally in the micro-trench. The resulting shift in the hydroquinone/ benzoquinone reversible potential causes a Faradaic sensor signal (employing chronoamperometry). This method provides a “chemical filter” by selecting pH-sensitive redox processes only, and by showing enhanced sensitivity in the region of low buffer capacity. The results for the chemically reversible hydroquinone/ benzoquinone system are contrasted to the detection of the chemically irreversible ammonia oxidation.
登录
查看更多内容
影响因子:
4.5
作者:
R. W. French;S. Gordeev;P. Raithby;F. Marken
通讯作者:
F. Marken
影响因子:
6.6
作者:
R. A. Webster;F. Xia;M. Pan;Shichun Mu;Sara Dale;S. Tsang;F. Hammett;C. Bowen;F. Marken
通讯作者:
F. Marken
DOI:
--
发表时间:
2009
期刊:
In Analysis
影响因子:
--
作者:
Liza Rassaei;R. W. French;R. Compton;F. Marken
通讯作者:
F. Marken
影响因子:
3
作者:
Anne Vuorema;Anne Vuorema;H. Meadows;Norahim Ibrahim;Norahim Ibrahim;J. Campo;M. Cortina;M. Vagin;A. Karyakin;M. Sillanpää;M. Sillanpää;F. Marken
通讯作者:
F. Marken
影响因子:
4.5
作者:
Liza Rassaei;M. Herrmann;S. Gordeev;F. Marken
通讯作者:
F. Marken