Fabrication of solid-state nanopores with single-nanometre precision

Storm, A.J.; Chen, J. H.; Ling, Xinsheng; Zandbergen, H.W.; Dekker, Cees

doi:10.1038/nmat941

Cited by 1,245 publications

(1,238 citation statements)

References 9 publications

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“…12 needs to be taken into account. Macroscopic and microscopic contact angles can be correlated to each other using a modification of Young's equation 71 (13) (14) where θ is the microscopic WCA, τ is the line tension, γ LV is the surface tension at the liquidvapor interface, and r B is the radius of the base of the droplet.…”

Section: Influence Of Droplet Size On Water Contact Anglementioning

confidence: 99%

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Water−Silica Force Field for Simulating Nanodevices

2006

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Amorphous silica is an inorganic material that is central for many nanotechnology appplications, such as nanoelectronics, microfluidics, and nanopore technology. In order to use molecular dynamics (MD) simulations to study the behavior of biomolecules with silica, we developed a force field for amorphous silica surfaces based on their macroscopic wetting properties that is compatible with the CHARMM force field and TIP3P water model. The contact angle of a water droplet with silica served as a criterion to tune the intermolecular interactions. The resulting force field was used to study the permeation of water through silica nanopores, illustrating the influence of the surface topography and the intermolecular parameters on permeation kinetics. We find that minute modeling of the amorphous surface is critical for MD studies, since the particular arrangement of surface atoms controls sensitively electrostatic interactions between silica and water.

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Section: Influence Of Droplet Size On Water Contact Anglementioning

confidence: 99%

“…Recent advances in silica nanotechnology 13,14 have been exploited to manufacture pores in thin synthetic membranes with subnanometer precision. Immersed in an electrolytic solution and under the influence of an electric field, nanopores can be deployed to filter and monitor translocation of DNA and other charged macromolecules.…”

Section: Introductionmentioning

confidence: 99%

Water−Silica Force Field for Simulating Nanodevices

2006

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“…This strategy is especially useful for creating nanopores with diameters of 2 nm or less, the most appropriate dimension that exhibits many unusual properties 18 . Molecular-scale nanopores are technically challenging for currently known techniques such as electron-beam lithography (pore size ~5-10 nm) 19 or track-etching (pore size typically ≥10 nm) 20 that are used to fabricate polymer or solid-state films with low surface pore densities.…”

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confidence: 99%

Self-assembling subnanometer pores with unusual mass-transport properties

et al. 2012

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A long-standing aim in molecular self-assembly is the development of synthetic nanopores capable of mimicking the mass-transport characteristics of biological channels and pores. Here we report a strategy for enforcing the nanotubular assembly of rigid macrocycles in both the solid state and solution based on the interplay of multiple hydrogen-bonding and aromatic π − π stacking interactions. The resultant nanotubes have modifiable surfaces and inner pores of a uniform diameter defined by the constituent macrocycles. The self-assembling hydrophobic nanopores can mediate not only highly selective transmembrane ion transport, unprecedented for a synthetic nanopore, but also highly efficient transmembrane water permeability. These results establish a solid foundation for developing synthetically accessible, robust nanostructured systems with broad applications such as reconstituted mimicry of defined functions solely achieved by biological nanostructures, molecular sensing, and the fabrication of porous materials required for water purification and molecular separations.

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“…[1][2][3][4] But despite the stability, tunability, and other potential advantages that fabricated solid state nanopores may offer, the ion beam, electron beam, or chemical etch fabrication conditions used to create nanopores usually yield uncharacterized and possibly unfavorable surface properties that can interfere with the pore's sensing abilities.…”

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confidence: 99%

Atomic Layer Deposition to Fine-Tune the Surface Properties and Diameters of Fabricated Nanopores

et al. 2004

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Atomic layer deposition of alumina enhanced the molecule sensing characteristics of fabricated nanopores by fine-tuning their surface properties, reducing 1/f noise, neutralizing surface charge to favor capture of DNA and other negative polyelectrolytes, and controlling the diameter and aspect ratio of the pores with near single Ångstrom precision. The control over the chemical and physical nature of the pore surface provided by atomic layer deposition produced a higher yield of functional nanopore detectors.

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Fabrication of solid-state nanopores with single-nanometre precision

Cited by 1,245 publications

References 9 publications

Water−Silica Force Field for Simulating Nanodevices

Water−Silica Force Field for Simulating Nanodevices

Self-assembling subnanometer pores with unusual mass-transport properties

Atomic Layer Deposition to Fine-Tune the Surface Properties and Diameters of Fabricated Nanopores

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