000230087 001__ 230087
000230087 005__ 20181203035606.0
000230087 0247_ $$2doi$$a10.1021/acs.analchem.7b02072
000230087 022__ $$a1520-6882
000230087 02470 $$2ISI$$a000410014900097
000230087 037__ $$aARTICLE
000230087 245__ $$aSingle Organic Droplet Collision Voltammogram via Electron Transfer Coupled Ion Transfer
000230087 260__ $$aWashington$$bAmerican Chemical Society$$c2017
000230087 269__ $$a2017
000230087 300__ $$a8
000230087 336__ $$aJournal Articles
000230087 520__ $$aSingle-emulsion toluene oil droplets (femtoliter) containing a hydrophobic redox probe that are dispersed in water stochastically collide with an ultramicroelectrode (UME). The fast-scan cyclic voltammetry (FSCV) or Fourier-transformed sinusoidal voltammetry (FTSV) is applied: the UME was scanned with a fast, repetitive triangular, or sinusoidal potential, and its current in time/frequency domains were monitored. The electron transfer at the UME/oil interface is coupled with ion transfer at the oil/water interface. Thus, the obtained transient voltammograms of a myriad of ions were used to estimate thermodynamics of ion transfer at the toluene/water interface. Additionally, the single-droplet voltammogram combined with finite element simulations reveal the droplet’s size and shape distributions. Four collision mechanisms with new physical insights were also uncovered via comprehensive analysis of phase angle in the frequency domain, time domain FSCVs, and finite element simulations.
000230087 700__ $$aLiu, Cheng
000230087 700__ $$0247474$$aPeljo, Pekka Eero$$g218461
000230087 700__ $$aHuang, Xinjian
000230087 700__ $$aCheng, Wenxue
000230087 700__ $$aWang, Lishi
000230087 700__ $$0244421$$aDeng, Haiqiang$$g199475
000230087 773__ $$j89$$k17$$q9284-9291$$tAnalytical Chemistry
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000230087 8564_ $$s16381864$$uhttps://infoscience.epfl.ch/record/230087/files/ac7b02072_si_001.pdf$$ySupporting Information$$zSupporting Information
000230087 8564_ $$s2683494$$uhttps://infoscience.epfl.ch/record/230087/files/acs.analchem.7b02072.pdf$$yPublisher's version$$zPublisher's version
000230087 909C0 $$0252090$$pLEPA$$xU10100
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000230087 937__ $$aEPFL-ARTICLE-230087
000230087 973__ $$aEPFL$$rREVIEWED$$sPUBLISHED
000230087 980__ $$aARTICLE