Diode-like single-ion track membrane prepared by electro-stopping

Apel, P.Yu.; Korchev, Yuri E.; Siwy, Zuzanna S.; Spohr, R.; Yoshida, Minoru

doi:10.1016/s0168-583x(01)00722-4

Cited by 508 publications

(647 citation statements)

References 5 publications

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“…The membrane is exposed to UV light with maximum intensity at 320 nm for approximately 30 min. The UV treatment leads to saturation of the damage in the tracks so that further storage of the samples in air or illumination with visible light does not change the etching behavior (30).…”

Section: Track-etched Polymer Membranesmentioning

confidence: 99%

“…The first method is based on the irradiation with fragments from the fission of heavy nuclei such as californium, bismuth, or uranium (33) of energy 11.4 MeV per nucleon (30,34). Typical energy losses of the fission fragments are about 10 keV nm Ϫ1 .…”

Section: (A) Trackingmentioning

confidence: 99%

“…It was recently shown that strict control of the etching conditions allows one to control the shape of the pores, obtaining, for example, funnel-like or conically shaped pores (30). Conical pores can be obtained by asymmetric etching with oxygen plasma of initially cylindrical pores (37), or by performing an asymmetric chemical etching, so that V B Ͼ V T , with the ratio changing throughout the thickness of the membrane.…”

Section: 3)mentioning

confidence: 99%

“…The scheme of the apparatus used for the asymmetric etching is shown in Figure 16.2.4A. For asymmetric etching of PC or PET, one side of the membrane is put in contact with an alkaline etching solution, usually 9 M NaOH or KOH, and the other side is in contact with the stopping medium, typically a weak acid solution such as 1 M HCOOH in 1 M KCl (30). For asymmetric etching of polyimide (Kapton), the etching solution is NaClO (with 13% active chlorine) while the stopping medium is a suitable reducing agent such as 1 M KI (39).…”

Section: 3)mentioning

confidence: 99%

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Template Deposition of Metals

Ugo

Moretto

2007

Handbook of Electrochemistry

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Template synthesis is a relatively simple and easy procedure which has made the fabrication of rather sophisticated nanomaterials accessible to almost any laboratory. Template synthesis requires access to instrumentation capable of metal sputtering and electrochemical deposition. The characterization of the fabricated nanostructures can be done using instrumental techniques including spectrophotometry, voltammetry, optical microscopy, atomic force microscopy, and electronic microscopies (scanning electron microscopy (SEM) and transmission electron microscopy (TEM)).The method is based on the simple but effective idea that the pores of a host material can be used as a template to direct the growth of new materials. Historically, template synthesis was introduced by Possin (1) and refined by Williams and Giordano (2) who prepared different metallic nanowires with widths as small as 10 nm within the pores of etched nuclear damaged tracks in mica. It was further developed by Martin's group (3-5) and followed by others (6) with the number of examples and applications (7) continually increasing. The nanoporous membranes usually employed as templates are alumina or track-etched polymeric membranes which are widely used as ultrafiltration membranes. Recently, metal nanostructures have also been obtained using the pores created by self-assembly in block copolymer structures under the influence of electric fields and high temperatures (8, 9).The first part of this section focuses on the main characteristics and fabrication techniques used for obtaining templating membranes and depositing metal nanostructures by suitable electroless and electrochemical procedures. Methods such as sol-gel (10-12) or chemical vapor deposition (10, 13), which have been used primarily for the template deposition of carbon, oxides, or semiconducting-based materials, will not be considered here in detail. The second part of the section focuses on the electrochemical properties of the fabricated nanomaterials with emphasis on the characteristics and applications of nanoelectrode ensembles (NEEs). Templating membranes 16.2.2

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Section: Track-etched Polymer Membranesmentioning

confidence: 99%

Section: (A) Trackingmentioning

confidence: 99%

Section: 3)mentioning

confidence: 99%

Section: 3)mentioning

confidence: 99%

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Template Deposition of Metals

Ugo

Moretto

2007

Handbook of Electrochemistry

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“…High sensor sensitivities can be achieved because of the small working volume and the off-the-shelf electronic equipment. 12 The asymmetric track-etching technique 12 was employed here to fabricate the asymmetric nanopores in polyethylene terephthalate (PET) membranes of thickness 12 µm. Both single pore and multipore (10 4 pores/cm 2 ) membranes were obtained by heavy ion irradiation and subsequent chemical track-etching process (see Supporting Information for experimental details).…”

mentioning

confidence: 99%

Ionic Transport through Chemically Functionalized Hydrogen Peroxide-Sensitive Asymmetric Nanopores

Ali

Ahmed

Nasir

et al. 2015

ACS Appl. Mater. Interfaces

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American Chemical SocietyAli, M.; Ahmed, I.; Nasir, S.; Ramirez Hoyos, P.; Niemeyer, CM.; Mafe, S.; Ensinger, W. (2015). Ionic transport through chemically functionalized hydrogen peroxide-sensitive asymmetric nanopores. ACS Applied Materials and Interfaces. 7(35):19541-19545 ABSTRACTWe describe the fabrication of a chemical-sensitive nanofluidic device based on asymmetric nanopores whose transport characteristics can be modulated upon exposure to hydrogen peroxide (H 2 O 2 ). We show experimentally and theoretically that the current-voltage curves provide a suitable method to monitor the change of pore surface characteristics induced by H 2 O 2 in solution from the electronic readouts. We demonstrate also that the single pore characteristics can be scaled to the case of a multipore membrane whose electric outputs can be readily controlled.Because H 2 O 2 is an agent significant for medical diagnostics, the results should be useful for sensing nanofluidic devices.

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