Scanning Electrospray Microscopy with Nanopipets

Yuill, Elizabeth M.; Shi, Wenqing; Poehlman, J.; Baker, Lane A.

doi:10.1021/acs.analchem.5b03399

Cited by 14 publications

(13 citation statements)

References 21 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Based on the well-controlled ES current versus electric field, ES with micrometer gap has been tested as a scanning microscopy to measure the surface topography with resolution in the µm range, linking the ES current evolution with the electric field i.e. with the gap length above surface defaults (Yuill et al, 2015). Moreover, ES has been tested with magnetic fluids, as a tunable current source from simultaneous ES and electrical discharge versus the magnetic field intensity to control the shape of cones, the subsequent discharge regimes and related ozone production for gas depollution purposes (Uehara et al, 2015).…”

Section: Discussionmentioning

confidence: 99%

Review on water electro-sprays and applications of charged drops with focus on the corona-assisted cone-jet mode for High Efficiency Air Filtration by wet electro-scrubbing of aerosols

Borra

2018

Journal of Aerosol Science

View full text Add to dashboard Cite

 electrosprays is a continuous production process of self-dispersed unipolar droplets with monodisperse/unimodal size distributions (0.2 < d modal < 150 µm)  Applications of ES of aqueous solutions are reviewed with special attention for material production and bio-applications  Means to achieve steady water ES are presented with respect to electrical discharges in ambient air around the liquid cone and jet  Streamer discharges with transient and asymmetric space charges disrupt the EHD equilibrium for steady cone-jet mode, while the axisymmetric and quasi-stationary space charge is required to achieve steady water ES in the pulseless corona-assisted cone-jet mode  Empirical scaling laws of droplet properties are reminded for both steady water ES in cone-jet with a pulseless corona and without discharge  High filtration efficiencies of a lab-scale wet bipolar-scrubbers (>99%) supports that Water ES in corona-assisted cone-jet could be applied to low cost Air cleaning

show abstract

Section: Discussionmentioning

confidence: 99%

Review on water electro-sprays and applications of charged drops with focus on the corona-assisted cone-jet mode for High Efficiency Air Filtration by wet electro-scrubbing of aerosols

Borra

2018

Journal of Aerosol Science

View full text Add to dashboard Cite

show abstract

“…3,26,29,51 However, for nanopipettes that have openings less than 50 nm in diameter, the resolution of SEM is insufficient. The characterization of nanopipettes using SEM also becomes more difficult at this scale as it requires the nanopipette to be sputtered with a conducting metal, which affects the nanopipette dimensions.…”

Section: Evaluation Of Existing Methods For Nanopipette Characterizationmentioning

confidence: 99%

“…27 Beyond electroanalysis, nanopipettes are finding novel applications as devices for electrospray massspectrometry. 28,29 Nanopipette probes, employed in different types of scanning probe microscopy (SPM) techniques, 5,11,30 are used increasingly for the study of interfacial properties across a range of materials including electrodes and living cells. 3,31,32 Examples of SPM techniques that can employ nanopipettes include scanning electrochemical microscopy (SECM), 30,33 scanning ion conductance microscopy (SICM), 31,[34][35][36][37][38] SICM-SECM 9,39 and scanning electrochemical cell microscopy (SECCM).…”

Section: Introductionmentioning

confidence: 99%

Characterization of Nanopipettes

et al. 2016

View full text Add to dashboard Cite

Nanopipettes are widely used in electrochemical and analytical techniques as tools for sizing, sequencing, sensing, delivery and imaging. For all of these applications, the response of a nanopipette is strongly affected by its geometry and surface chemistry. As the size of nanopipettes becomes smaller, precise geometric characterization is increasingly important, especially if nanopipette probes are to be used for quantitative studies and analysis. This contribution highlights the combination of data from voltage-scanning ion conductivity experiments, transmission electron microscopy (TEM) and finite element method (FEM) simulations to fully characterize nanopipette geometry and surface charge characteristics, with an accuracy not achievable using existing approaches. Indeed, it is shown that presently used methods for nanopipette characterization can lead to highly erroneous information on nanopipettes. The new approach to characterization further facilitates high-level quantification of the behavior of nanopipettes in electrochemical systems, as demonstrated herein for a scanning ion conductance microscope (SICM) setup.

show abstract

“…To date, applications of nanopipettes have included their use as sensors for a variety of different analytes, as well as tools for local delivery of molecules, achieved by varying the electric field at the end of the nanopipette to trap or release charged species . Additionally, they serve as powerful probes for electrochemical reactions, surface charge and topographical imaging, as well as other diverse applications, such as enabling the nanobiopsy of living cells and electrospray analysis …”

Section: Introductionmentioning

confidence: 99%

Electrochemical Control of Calcium Carbonate Crystallization and Dissolution in Nanopipettes

et al. 2016

View full text Add to dashboard Cite

Electrochemically controlled nanopipettes are becoming increasingly versatile tools for a diverse range of sequencing, sizing, and imaging applications. Herein, the use of nanopipettes to induce and quantitatively monitor crystallization and dissolution in real time is considered, using CaCO3 in aqueous solution as an exemplar system. The bias between a quasi‐reference counter electrode in a nanopipette and one in a bulk solution is used to mix (or de‐mix) two different solutions by ion migration and drive either growth or dissolution, depending on the polarity. Furthermore, Raman spectroscopy can be applied simultaneously to identify polymorphs formed in the nanopipette. The technique is supported with a robust finite element method model that allows the extraction of time‐dependent saturation levels and mixing characteristics at the nanoscale. The technique shows great promise as a tool for rapidly screening growth additives and inhibitors, allowing eight different additives to be ranked in order of efficacy for crystal growth rate inhibition.

show abstract

Scanning Electrospray Microscopy with Nanopipets

Cited by 14 publications

References 21 publications

Review on water electro-sprays and applications of charged drops with focus on the corona-assisted cone-jet mode for High Efficiency Air Filtration by wet electro-scrubbing of aerosols

Review on water electro-sprays and applications of charged drops with focus on the corona-assisted cone-jet mode for High Efficiency Air Filtration by wet electro-scrubbing of aerosols

Characterization of Nanopipettes

Electrochemical Control of Calcium Carbonate Crystallization and Dissolution in Nanopipettes

Contact Info

Product

Resources

About