Rapid fabrication and piezoelectric tuning of micro- and nanopores in single crystal quartz

Stava, Eric; Yu, Minrui; Shin, Hyun Cheol; Kreft, Dustin J.; Blick, Robert H.

doi:10.1039/c2lc40925a

Cited by 6 publications

(5 citation statements)

References 41 publications

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“…49 Other than this, porous piezoelectric substrate (quartz) has also been adopted to control the size of nanopore using biasing voltage across the substrate. 50 First, laser excitation was adopted to generate pores in the quartz whose sizes can be fine-tuned from hundreds of nanometers to tens of micrometers. Biasing voltage was then applied on the porous quartz, which can significantly enlarge the pore size through piezoelectric deformation.…”

Section: Resultsmentioning

confidence: 99%

Tunable, Strain-Controlled Nanoporous MoS₂ Filter for Water Desalination

et al. 2016

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The deteriorating state of global fresh water resources represents one of the most serious challenges that scientists and policymakers currently face. Desalination technologies, which are designed to extract potable water from the planet's bountiful stores of seawater, could serve to alleviate much of the stress that presently plagues fresh water supplies. In recent decades, desalination methods have improved via water-filtering architectures based on nanoporous graphene filters and artificial membranes integrated with biological water channels. Here, we report the auspicious performance (in simulations) of an alternative nanoporous desalination filter constructed from a MoS2 nanosheet. In striking contrast to graphene-based filters, we find that the "open" and "closed" states of the MoS2 filter can be regulated by the introduction of mechanical strain, yielding a highly tunable nanopore interface. By applying lateral strain to the MoS2 filter in our simulations, we see that the transition point between "open" and "closed" states occurs under tension that induces about 6% cross-sectional expansion in the membrane (6% strain); the open state of the MoS2 filter demonstrates high water transparency and a strong salt filtering capability even under 12% strain. Our results thus demonstrate the promise of a controllable nanoporous MoS2 desalination filter, wherein the morphology and size of the central nanopore can be precisely regulated by tensile strain. These findings support the design and proliferation of tunable nanodevices for filtration and other applications.

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Section: Resultsmentioning

confidence: 99%

Tunable, Strain-Controlled Nanoporous MoS₂ Filter for Water Desalination

et al. 2016

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“…This value is larger than that of the unstrained N4 membrane (1.00 kg m –2 s –1 MPa –1 ), and it is fairly superior to that of a MoS 2 filter (∼0.987 kg m –2 s –1 MPa –1 , simulated) under similar conditions. In the laboratory, there are several strategies to apply strain to layered materials, − which allow for the realization of strain on h-BN nanosheets.…”

Section: Results and Discussionmentioning

confidence: 99%

Rational Design and Strain Engineering of Nanoporous Boron Nitride Nanosheet Membranes for Water Desalination

et al. 2017

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Through systematic molecular dynamics simulations we theoretically investigate the potential applications of hexagonal boron nitride (h-BN) for seawater desalination. Our results indicate that the rationally designed h-BN membranes have great permeability, selectivity, and controllability for water desalination. The size and chemistry of the pores are shown to play an important role in regulating the water flux and salt rejection. Pores with only nitrogen atoms on the edges have higher fluxes than the boron-lined pores. In particular, two-dimensional h-BN with medium-sized N4 pores show 100% salt rejection with outstanding water permeability, which is several orders of magnitude higher than that of conventional reverse osmosis membranes. Furthermore, we study the mechanical strain effect on the desalination performance of monolayer h-BN with relatively small N3 pores, suggesting that water flux and salt rejection can be precisely tuned by tensile strain. The findings in the present work unambiguously propose that porous boron nitride nanosheets are quite promising as new functional membranes for water desalination.

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“…Since our procedure utilizes UV wavelengths, the laser parameters can be tuned to produce remarkably smaller pores. 23,30 Furthermore, tuning of the air-gap spacing and reective material could be used to enhance control over the crater-micropore structure, thereby tuning the system to the particular cell type under investigation.…”

Section: Discussionmentioning

confidence: 99%