Control of the resistive switching voltage and reduction of the high-resistive-state current of zinc oxide by self-assembled monolayers

Nakano, Masahiro; Matsui, Hiroki; Nakagawa, Sae; You, Jiaxun; Shahiduzzaman, Md.; Karakawa, Makoto; Taima, Tetsuya

doi:10.1039/d2cc06919a

Cited by 4 publications

(1 citation statement)

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“…Such spaces include environments that are surrounded by nanopore structures, as well as surface spaces that are strongly bounded from the surface. The design of such spaces involves the use of mesoporous materials [215][216][217][218], metal-organic frameworks (MOFs) [219][220][221][222], covalent organic frameworks (COFs) [223][224][225][226], self-assembled monolayers (SAM) [227][228][229][230], Langmuir-Blodgett (LB) film [231][232][233][234], layer-by-layer (LbL) assembly [235][236][237][238], etc.…”

Section: Introductionmentioning

confidence: 99%

Confined Space Nanoarchitectonics for Dynamic Functions and Molecular Machines

Ariga

2024

Micromachines

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Nanotechnology has advanced the techniques for elucidating phenomena at the atomic, molecular, and nano-level. As a post nanotechnology concept, nanoarchitectonics has emerged to create functional materials from unit structures. Consider the material function when nanoarchitectonics enables the design of materials whose internal structure is controlled at the nanometer level. Material function is determined by two elements. These are the functional unit that forms the core of the function and the environment (matrix) that surrounds it. This review paper discusses the nanoarchitectonics of confined space, which is a field for controlling functional materials and molecular machines. The first few sections introduce some of the various dynamic functions in confined spaces, considering molecular space, materials space, and biospace. In the latter two sections, examples of research on the behavior of molecular machines, such as molecular motors, in confined spaces are discussed. In particular, surface space and internal nanospace are taken up as typical examples of confined space. What these examples show is that not only the central functional unit, but also the surrounding spatial configuration is necessary for higher functional expression. Nanoarchitectonics will play important roles in the architecture of such a total system.

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Section: Introductionmentioning

confidence: 99%

Confined Space Nanoarchitectonics for Dynamic Functions and Molecular Machines

Ariga

2024

Micromachines

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Vanadium promoted ZnO films: Effects on optical and photocatalytic properties

Avşar,

Karakas

2023

Surface Engineering

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The effect of electrodeposition temperature, vanadium doping, and oxidation state of vanadium on the photocatalytic activity of ZnO thin films over ITO substrates were investigated. NH 4 VO 3 aqueous solution was used as precursor to dope ZnO thin film samples with V 5+ by dip coating method and oxalic acid was used as reducing agent to synthesize V +4 doped samples. UV-Vis spectroscopy was used to determine the direct and indirect band gap values of thin film samples. Methylene blue (MB) degradation assays were used to evaluate the photocatalytic activity. XPS analysis was used to determine the analyse oxidation state of vanadium over the samples. Photocatalytic activity studies revealed that ZnO samples electrodeposited at 70°C have higher band gap and MB degradation activity under artificial solar irradiation. The presence of vanadium also enhances the photocatalytic activity of ZnO and samples doped with V +4 have higher photocatalytic activity than the samples doped with V +5 sites.

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Materials Nanoarchitectonics for Advanced Devices

Ariga

2024

Materials

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Advances in nanotechnology have made it possible to observe and evaluate structures down to the atomic and molecular level. The next step in the development of functional materials is to apply the knowledge of nanotechnology to materials sciences. This is the role of nanoarchitectonics, which is a concept of post-nanotechnology. Nanoarchitectonics is defined as a methodology to create functional materials using nanounits such as atoms, molecules, and nanomaterials as building blocks. Nanoarchitectonics is very general and is not limited to materials or applications, and thus nanoarchitecture is applied in many fields. In particular, in the evolution from nanotechnology to nanoarchitecture, it is useful to consider the contribution of nanoarchitecture in device applications. There may be a solution to the widely recognized problem of integrating top-down and bottom-up approaches in the design of functional systems. With this in mind, this review discusses examples of nanoarchitectonics in developments of advanced devices. Some recent examples are introduced through broadly dividing them into organic molecular nanoarchitectonics and inorganic materials nanoarchitectonics. Examples of organic molecular nanoarchitecture include a variety of control structural elements, such as π-conjugated structures, chemical structures of complex ligands, steric hindrance effects, molecular stacking, isomerization and color changes due to external stimuli, selective control of redox reactions, and doping control of organic semiconductors by electron transfer reactions. Supramolecular chemical processes such as association and intercalation of organic molecules are also important in controlling device properties. The nanoarchitectonics of inorganic materials often allows for control of size, dimension, and shape, and their associated physical properties can also be controlled. In addition, there are specific groups of materials that are suitable for practical use, such as nanoparticles and graphene. Therefore, nanoarchitecture of inorganic materials also has a more practical aspect. Based on these aspects, this review finally considers the future of materials nanoarchitectonics for further advanced devices.

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Control of the resistive switching voltage and reduction of the high-resistive-state current of zinc oxide by self-assembled monolayers

Abstract: The resistive switching voltages of SAM-modified ZnO films were shifted from that of bare ZnO (from 2.9 V to 1.6 V) depending on the surface dipole induced by SAMs, and the on/off ratio was also improved by SAM modification (from 102 to 104).

Cited by 4 publications

References 44 publications

Confined Space Nanoarchitectonics for Dynamic Functions and Molecular Machines

Confined Space Nanoarchitectonics for Dynamic Functions and Molecular Machines

Vanadium promoted ZnO films: Effects on optical and photocatalytic properties

Materials Nanoarchitectonics for Advanced Devices

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