Enhanced Ionic Transport Mechanism by Gramicidin A Confined Inside Nanopores Tuned by Atomic Layer Deposition

Chaaya, Adib Abou; Poitevin, Mathilde Le; Cabello-Aguilar, Simon; Balme, Sébastien; Bechelany, Mikhaël; Kraszewski, Sebastian; Picaud, Fabien; Cambedouzou, Julien; Balanzat, E.; Janot, Jean‐Marc; Thami, Thierry; Miele, Philippe; Déjardin, Philippe

doi:10.1021/jp403330d

Cited by 40 publications

(66 citation statements)

References 68 publications

(114 reference statements)

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“…[128] Atomic layer deposition (ALD) is gaining increasinga ttention in the energya nd environmental fields as ap romising methodf or surfacem odification and protection. [132][133][134][135] The originality of ALD was given to Professor Aleskovskii and his team in 1960 when they realizedt he deposition of TiO 2 from TiCl 4 and H 2 O. [132][133][134][135] The originality of ALD was given to Professor Aleskovskii and his team in 1960 when they realizedt he deposition of TiO 2 from TiCl 4 and H 2 O.…”

Section: Atomic Layer Depositionmentioning

confidence: 99%

Recent Progress on Titanium Dioxide Nanomaterials for Photocatalytic Applications

et al. 2018

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Environmental and energy problems have drawn much attention owing to rapid population growth and accelerated economic development. For instance, photocatalysis, "a green technology", plays an important role in solar-energy conversion owing to its potential to solve energy and environmental problems. Recently, many efforts have been devoted to improving visible-light photocatalytic activity by using titanium dioxide as a photocatalyst as a result of its wide range of applications in the energy and environment fields. However, fast charge recombination and an absorption edge in the UV range limit the photocatalytic efficiency of TiO under visible-light irradiation. Many investigations have been undertaken to overcome the limitations of TiO and, therefore, to enhance its photocatalytic activity under visible light. The present literature review focuses on different strategies used to promote the separation efficiency of electron-hole pairs and to shift the absorption edge of TiO to the visible region. Current synthesis techniques used to elaborate several nanostructures of TiO -based materials, recent progress in enhancing visible photocatalytic activity, and different photocatalysis applications will be discussed. On the basis of the studies reported in the literature, we believe that this review will help in the development of new strategies to improve the visible-light photocatalytic performance of TiO -based materials further.

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Section: Atomic Layer Depositionmentioning

confidence: 99%

Recent Progress on Titanium Dioxide Nanomaterials for Photocatalytic Applications

et al. 2018

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“…Supported PAN nanobers with 240 seconds of (Table 1). 45,[47][48][49][50][51][52][53][54] XRD diffraction patterns of ZnO thin lms are shown in Fig. 2a.…”

Section: Inuence Of the Zno Thickness On Uv Photodetectionmentioning

confidence: 99%

ZnO 1D nanostructures designed by combining atomic layer deposition and electrospinning for UV sensor applications

et al. 2014

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We explored for the first time the ability of a three-dimensional polyacrylonitrile/ZnO material prepared by a low-cost and scalable synthesis method based on the combination of electrospinning and atomic layer deposition (ALD) as a new material with a large surface area to enhance the performance of UV photodetection. The UV photoresponse current was enhanced by a factor of 250 compared to a flat electrode. In addition an increase by a factor of 1.3 of the recovery time has been observed which is negligible versus the huge amount of current enhancement. The greatly improved performance and the good stability of these nanostructured electrodes induce exciting materials for use in UV sensor applications. A IntroductionUV photodetection has been widely studied in the last few years 1-10 due to its large civil and military application elds such as secure space-to-space communications, pollution monitoring, water sterilization, and ame sensing. The semiconductor based UV photodetection process is a simple physical phenomenon based on electron-hole generation into a semiconductor under photon shelling. Basically when a photon with energy larger than the one of the semiconductor band-gap is absorbed, an electron-hole pair is produced. This induces a change of the electrical conductivity properties of the semiconductor. Low band gap energy semiconductors have been widely used for UV photodetection, especially the Si-based photodetectors (E g ¼ 1.1 eV). Despite both their high sensitivity and quick response advantages, low E g UV photodetectors are sensitive to low energy photons (visible and infrared), and thus, they require the insertion of protection lters to avoid signal/ noise related to those low electron energies. Moreover an ultrahigh vacuum and a very high voltage supply were required. 11 The disadvantages of the low E g based photodetectors disappear in the high band gap semiconductors. Moreover, wide-band gap materials are both chemically and thermally stable which is an advantage for devices operating in harsh environments. [12][13][14] Among the high band gap semiconductor category, ZnO is one of the most widely used semiconductors for UV photodetection due to its high chemical stability, low cost, and large band gap of 3.37 eV at room temperature. Mollow et al. reported the rst UV photoresponse in ZnO lms in 1940. 15 Since then, many complex ZnO-based photodetectors with high performance have been reported, such as p-n junction, p-i-n junction and Schottky junction. 3,16-23 ZnO UV sensors have been prepared using different deposition techniques such as Metal Organic Chemical Vapor Phase Deposition (MOCVD), 24,25 laser assisted molecular beam deposition (LAMBD), 26 radio frequency (RF) magnetron sputtering, 27-29 atomic-layer deposition (ALD) 30 and molecular beam epitaxy (MBE). 31,32 Moreover different electrode types such as Au, Ag, Pt, Ni, Pd, Cr, Al, and Ru have been elaborated and their performances have been investigated. Nanostructured ZnO for UV detection was also investigated. They show promisi...

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“…In order to tackle these problems, the nanopore can be modified by atomic layer deposition (ALD) [34]. This method is particularly adapted to fashion nanopore since it permits (i) to coat identically and homogeneously the inside and the outside of the nanopore [35], (ii) to functionalize the surface with chemically active groups such as amine and (iii) to control precisely the nanopore diameter up to 1 nm [36].…”

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confidence: 99%

Non-Fluorescence label protein sensing with track-etched nanopore decorated by avidin/biotin system

Lepoitevin

Bechelany

Balanzat

et al. 2016

Electrochimica Acta

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Enhanced Ionic Transport Mechanism by Gramicidin A Confined Inside Nanopores Tuned by Atomic Layer Deposition

Abstract: International audienc

Cited by 40 publications

References 68 publications

Recent Progress on Titanium Dioxide Nanomaterials for Photocatalytic Applications

Recent Progress on Titanium Dioxide Nanomaterials for Photocatalytic Applications

ZnO 1D nanostructures designed by combining atomic layer deposition and electrospinning for UV sensor applications

Non-Fluorescence label protein sensing with track-etched nanopore decorated by avidin/biotin system

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