Ion-transfer voltammetry at silicon membrane-based arrays of micro-liquid-liquid interfaces

Lab on a Chip
Raúl ZazpeDamien W M Arrigan


Microporous silicon membranes, fabricated by lithographic patterning and wet and dry silicon etching processes, were used to create arrays of micro-scale interfaces between two immiscible electrolyte solutions (muITIES) for ion-transfer voltammetry. These membranes served the dual functions of interface stabilization and enhancement of the rate of mass-transport to the interface. The pore radii were 6.5 microm, 12.8 microm and 26.6 microm; the pore-pore separations were ca. 20- to 40-times the pore radii and the membrane thickness was 100 microm. Deep reactive ion etching (DRIE) was used for pore drilling through the silicon, which had been previously selectively thinned by potassium hydroxide etching. DRIE produces hydrophobic fluorocarbon-coated internal pore walls. The small pore sizes and large pore-pore separations used resulted in steady-state voltammograms for the transfer of tetramethylammonium cation (TMA(+)) from the aqueous to the organic phase, whereas the reverse voltammetric sweeps were peak-shaped. These asymmetric voltammograms are consistent with the location of the ITIES at the aqueous side of the silicon membrane such that the organic phase fills the micropores. Comparison of the experimental currents to calc...Continue Reading


Feb 15, 2003·Analytical Chemistry·Simon S HillKamran Yunus
Sep 25, 2003·Journal of the American Chemical Society·Shigeru AmemiyaTracy L Wazenegger
Mar 11, 2004·Chemical Communications : Chem Comm·Damien W M ArriganValerio Beni
Sep 15, 2004·Analytical Chemistry·Carlos M PereiraFernando Silva
Apr 25, 2006·Physical Chemistry Chemical Physics : PCCP·Robert A W Dryfe
Jun 15, 2006·Analytical Chemistry·Petra S DittrichAndreas Manz
May 23, 2007·Langmuir : the ACS Journal of Surfaces and Colloids·Alfonso BerduqueDamien W M Arrigan
Aug 1, 1998·Analytical Chemistry·Y Shao, M V Mirkin


Dec 15, 2012·Analytical and Bioanalytical Chemistry·Eva Alvarez de EulateDamien W M Arrigan
Sep 18, 2014·Langmuir : the ACS Journal of Surfaces and Colloids·Lukasz PoltorakAlain Walcarius
Mar 3, 2012·The Journal of Physical Chemistry. B·Rui Campos, Ritu Kataky
Mar 19, 2013·Analytica Chimica Acta·Grégoire Herzog, Valerio Beni
Jun 11, 2010·Physical Chemistry Chemical Physics : PCCP·Micheál D ScanlonDamien W M Arrigan
Oct 7, 2010·Physical Chemistry Chemical Physics : PCCP·Shaikh Nayeem FaisalHye Jin Lee
Jul 26, 2012·Chemistry, an Asian Journal·Eva Alvarez de EulateDamien W M Arrigan
Dec 25, 2012·Analytical Chemistry·Shane O'Sullivan, Damien W M Arrigan
Jun 13, 2018·Annual Review of Analytical Chemistry·Shudong ZhangYuanhua Shao
Jul 6, 2018·Faraday Discussions·Angelika HolzingerChristine Kranz

Related Concepts

Scanning Electron Microscopy
Microarray Analysis

Trending Feeds


Coronaviruses encompass a large family of viruses that cause the common cold as well as more serious diseases, such as the ongoing outbreak of coronavirus disease 2019 (COVID-19; formally known as 2019-nCoV). Coronaviruses can spread from animals to humans; symptoms include fever, cough, shortness of breath, and breathing difficulties; in more severe cases, infection can lead to death. This feed covers recent research on COVID-19.

Chronic Fatigue Syndrome

Chronic fatigue syndrome is a disease characterized by unexplained disabling fatigue; the pathology of which is incompletely understood. Discover the latest research on chronic fatigue syndrome here.

Systemic Juvenile Idiopathic Arthritis

Systemic juvenile idiopathic arthritis is a rare rheumatic disease that affects children. Symptoms include joint pain, but also fevers and skin rashes. Here is the latest on this disease.

Chromatin Regulation and Circadian Clocks

The circadian clock plays an important role in regulating transcriptional dynamics through changes in chromatin folding and remodelling. Discover the latest research on Chromatin Regulation and Circadian Clocks here.

Central Pontine Myelinolysis

Central Pontine Myelinolysis is a neurologic disorder caused most frequently by rapid correction of hyponatremia and is characterized by demyelination that affects the central portion of the base of the pons. Here is the latest research on this disease.

Myocardial Stunning

Myocardial stunning is a mechanical dysfunction that persists after reperfusion of previously ischemic tissue in the absence of irreversible damage including myocardial necrosis. Here is the latest research.

Pontocerebellar Hypoplasia

Pontocerebellar hypoplasias are a group of neurodegenerative autosomal recessive disorders with prenatal onset, atrophy or hypoplasia of the cerebellum, hypoplasia of the ventral pons, microcephaly, variable neocortical atrophy and severe mental and motor impairments. Here is the latest research on pontocerebellar hypoplasia.

Cell Atlas Along the Gut-Brain Axis

Profiling cells along the gut-brain axis at the single cell level will provide unique information for each cell type, a three-dimensional map of how cell types work together to form tissues, and insights into how changes in the map underlie health and disease of the GI system and its crosstalk with the brain. Disocver the latest research on single cell analysis of the gut-brain axis here.

Chronic Traumatic Encephalopathy

Chronic Traumatic Encephalopathy (CTE) is a progressive degenerative disease that occurs in individuals that suffer repetitive brain trauma. Discover the latest research on traumatic encephalopathy here.