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Advances of Atomic Layer Deposition Synthetic Nanostructures

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A special issue of Materials (ISSN 1996-1944). This special issue belongs to the section "Advanced Nanomaterials and Nanotechnology".

Deadline for manuscript submissions: closed (31 March 2022) | Viewed by 12290

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Special Issue Editor

Dr. Mikhael Bechelany

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Guest Editor

European Institute of Membranes (IEM), University of Montpellier, 34090 Montpellier, France
Interests: atomic layer deposition; photocatalysis; electrospinning; nanomaterials; sensors; thin films
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Atomic layer deposition (ALD) is an ultrathin film deposition method. This technique permits the deposition of various materials (oxides, nitrides, metals, etc.) with a thickness control on the nanomateric scale, as well as excellent uniformity and conformality.

The aim of this Special Issue is to assemble high quality contributions on the synthesis and modification of nanostructures using ALD. It will deal with the design of new nanostructures by tuning their morphology, geometry, crystallinity, and interfaces. The relation between these parameters and the physical–chemical properties will also be investigated. New applications in different fields, such as health, environment, and renewable energy, will be explored as well.

Relevant contributions related to prospective materials’ design, original materials’ properties, and innovative characterization techniques will also be considered.

Dr. Mikhael Bechelany
Guest Editor

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Materials is an international peer-reviewed open access semimonthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2600 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

Thin film
Nanomaterial
Interface
Nanostructured material
Porous materials
Energy
Health
Environment
Membrane

Published Papers (4 papers)

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Research

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12 pages, 24323 KiB

Open AccessArticle

Tuning of Emission Wavelength of CaS:Eu by Addition of Oxygen Using Atomic Layer Deposition

by José Rosa, Jouko Lahtinen, Jaakko Julin, Zhipei Sun and Harri Lipsanen

Materials 2021, 14(20), 5966; https://0-doi-org.brum.beds.ac.uk/10.3390/ma14205966 - 11 Oct 2021

Cited by 3 | Viewed by 2614

Abstract

Atomic layer deposition (ALD) technology has unlocked new ways of manipulating the growth of inorganic materials. The fine control at the atomic level allowed by ALD technology creates the perfect conditions for the inclusion of new cationic or anionic elements of the already-known materials. Consequently, novel material characteristics may arise with new functions for applications. This is especially relevant for inorganic luminescent materials where slight changes in the vicinity of the luminescent centers may originate new emission properties. Here, we studied the luminescent properties of CaS:Eu by introducing europium with oxygen ions by ALD, resulting in a novel CaS:EuO thin film. We study structural and photoluminescent properties of two different ALD deposited Eu doped CaS thin films: Eu(thd)₃ which reacted with H₂S forming CaS:Eu phosphor, or with O₃ originating a CaS:EuO phosphor. It was found that the emission wavelength of CaS:EuO was 625.8 nm whereas CaS:Eu was 647 nm. Thus, the inclusion of O²⁻ ions by ALD in a CaS:Eu phosphor results in the blue-shift of 21.2 nm. Our results show that ALD can be an effective way to introduce additional elements (e.g., anionic elements) to engineer the physical properties (e.g., inorganic phosphor emissions) for photonics and optoelectronics. Full article

(This article belongs to the Special Issue Advances of Atomic Layer Deposition Synthetic Nanostructures)

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18 pages, 6703 KiB

Open AccessArticle

Palladium/Carbon Nanofibers by Combining Atomic Layer Deposition and Electrospinning for Organic Pollutant Degradation

by Melissa Najem, Amr A. Nada, Matthieu Weber, Syreina Sayegh, Antonio Razzouk, Chrystelle Salameh, Cynthia Eid and Mikhael Bechelany

Materials 2020, 13(8), 1947; https://0-doi-org.brum.beds.ac.uk/10.3390/ma13081947 - 21 Apr 2020

Cited by 19 | Viewed by 2873

Abstract

As organic dyes are a major source of pollution, it is important to develop novel and efficient heterogeneous catalysts with high activity for their degradation. In this work, two innovative techniques, atomic layer deposition and electrospinning, were used to prepare palladium nanoparticles (Pd NPs) supported on carbon nanofibers (CNFs). The sample morphology was investigated using scanning and transmission electron microscopy. This showed the presence of nanofibers of several micrometers in length and with a mean diameter of 200 nm. Moreover, the size of the highly dispersed Pd NPs was about 7 nm. X-ray photoelectron spectroscopy visually validated the inclusion of metallic Pd. The prepared nano-catalysts were then used to reduce methyl orange (MO) in the presence of sodium borohydride (NaBH₄). The Freundlich isotherm model was the most suitable model to explain the adsorption equilibrium for MO onto the Pd/CNF catalysts. Using 5 mL MO dye-solution (0.0305 mM) and 1 mL NaBH₄ (0.026 mM), a 98.9% of catalytic activity was achieved in 240 min by 0.01 g of the prepared nano-catalysts Pd/C (0.016 M). Finally, no loss of catalytic activity was observed when such catalysts were used again. These results represent a promising avenue for the degradation of organic pollutants and for heterogeneous catalysis. Full article

(This article belongs to the Special Issue Advances of Atomic Layer Deposition Synthetic Nanostructures)

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15 pages, 10236 KiB

Open AccessFeature PaperArticle

In Situ Microgravimetric Study of Ion Exchanges in the Ternary Cu-In-S System Prepared by Atomic Layer Deposition

by Harold Le Tulzo, Nathanaelle Schneider and Frédérique Donsanti

Materials 2020, 13(3), 645; https://0-doi-org.brum.beds.ac.uk/10.3390/ma13030645 - 01 Feb 2020

Cited by 2 | Viewed by 2100

Abstract

Reaction mechanisms during the growth of multinary compounds by atomic layer deposition can be complex, especially for sulfide materials. For instance, the deposition of copper indium disulfide (CuInS₂) shows a non-direct correlation between the cycle ratio, the growth per cycle of each binary growth cycles, i.e., Cu_xS and In₂S₃, and the film composition. This evidences side reactions that compete with the direct Atomic Layer Deposition (ALD) growth reactions and makes the deposition of large films very challenging. To develop a robust upscalable recipe, it is essential to understand the chemical surface reactions. In this study, reaction mechanisms in the Cu-In-S ternary system were investigated in-situ by using a quartz crystal microbalance system to monitor mass variations. Pure binary indium sulfide (In₂S₃) and copper sulfide (Cu_xS) thin film depositions on Al₂O₃ substrate were first studied. Then, precursors were transported to react on Cu_xS and In₂S₃ substrates. In this paper, gas-phase ion exchanges are discussed based on the recorded mass variations. A cation exchange between the copper precursor and the In₂S₃ is highlighted, and a solution to reduce it by controlling the thickness deposited for each stack of binary materials during the CuInS₂ deposition is finally proposed. Full article

(This article belongs to the Special Issue Advances of Atomic Layer Deposition Synthetic Nanostructures)

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Review

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20 pages, 5072 KiB

Open AccessReview

Advances in Atomic Layer Deposition (ALD) Nanolaminate Synthesis of Thermoelectric Films in Porous Templates for Improved Seebeck Coefficient

by Xin Chen and Helmut Baumgart

Materials 2020, 13(6), 1283; https://0-doi-org.brum.beds.ac.uk/10.3390/ma13061283 - 12 Mar 2020

Cited by 16 | Viewed by 3845

Abstract

Thermoelectrics is a green renewable energy technology which can significantly contribute to power generation due to its potential in generating electricity out of waste heat. The main challenge for the development of thermoelectrics is its low conversion efficiency. One key strategy to improve conversion efficiency is reducing the thermal conductivity of thermoelectric materials. In this paper, the state-of-the-art progresses made in improving thermoelectric materials are reviewed and discussed, focusing on phononic engineering via applying porous templates and ALD deposited nanolaminates structure. The effect of nanolaminates structure and porous templates on Seebeck coefficient, electrical conductivity and thermal conductivity, and hence in figure of merit zT of different types of materials system, including PnCs, lead chalcogenide-based nanostructured films on planar and porous templates, ZnO-based superlattice, and hybrid organic-inorganic superlattices, will be reviewed and discussed. Full article

(This article belongs to the Special Issue Advances of Atomic Layer Deposition Synthetic Nanostructures)

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