scholarly journals Fabrication of Graphene/Molybdenum Disulfide Composites and Their Usage as Actuators for Electrochemical Sensors and Biosensors

Molecules ◽  
2019 ◽  
Vol 24 (18) ◽  
pp. 3374 ◽  
Author(s):  
Jiri Kudr ◽  
Vojtech Adam ◽  
Ondrej Zitka
Keyword(s):  
Electrochemical Sensors ◽  
Transition Metal Dichalcogenides ◽  
Chemical Properties ◽  
Hybrid Nanostructures ◽  
Advanced Materials ◽  
Materials Synthesis ◽  
Comprehensive Overview ◽  
Electroanalytical Chemistry ◽  
Functional Composites ◽  
Metal Dichalcogenides

From the rediscovery of graphene in 2004, the interest in layered graphene analogs has been exponentially growing through various fields of science. Due to their unique properties, novel two-dimensional family of materials and especially transition metal dichalcogenides are promising for development of advanced materials of unprecedented functions. Progress in 2D materials synthesis paved the way for the studies on their hybridization with other materials to create functional composites, whose electronic, physical or chemical properties can be engineered for special applications. In this review we focused on recent progress in graphene-based and MoS2 hybrid nanostructures. We summarized and discussed various fabrication approaches and mentioned different 2D and 3D structures of composite materials with emphasis on their advances for electroanalytical chemistry. The major part of this review provides a comprehensive overview of the application of graphene-based materials and MoS2 composites in the fields of electrochemical sensors and biosensors.

scholarly journals Strategies to Build Hybrid Protein–DNA Nanostructures

Nanomaterials ◽  
2021 ◽  
Vol 11 (5) ◽  
pp. 1332
Author(s):  
Armando Hernandez-Garcia
Keyword(s):  
Dynamic Systems ◽  
Dna Nanotechnology ◽  
Chemical Properties ◽  
Hybrid Nanostructures ◽  
Advanced Materials ◽  
Dna Nanostructures ◽  
Hybrid Protein ◽  
Structural Protein ◽  
The Individual ◽  
Structural Dna Nanotechnology

Proteins and DNA exhibit key physical chemical properties that make them advantageous for building nanostructures with outstanding features. Both DNA and protein nanotechnology have growth notably and proved to be fertile disciplines. The combination of both types of nanotechnologies is helpful to overcome the individual weaknesses and limitations of each one, paving the way for the continuing diversification of structural nanotechnologies. Recent studies have implemented a synergistic combination of both biomolecules to assemble unique and sophisticate protein–DNA nanostructures. These hybrid nanostructures are highly programmable and display remarkable features that create new opportunities to build on the nanoscale. This review focuses on the strategies deployed to create hybrid protein–DNA nanostructures. Here, we discuss strategies such as polymerization, spatial directing and organizing, coating, and rigidizing or folding DNA into particular shapes or moving parts. The enrichment of structural DNA nanotechnology by incorporating protein nanotechnology has been clearly demonstrated and still shows a large potential to create useful and advanced materials with cell-like properties or dynamic systems. It can be expected that structural protein–DNA nanotechnology will open new avenues in the fabrication of nanoassemblies with unique functional applications and enrich the toolbox of bionanotechnology.

scholarly journals Molecular chemistry approaches for tuning the properties of two-dimensional transition metal dichalcogenides

2018 ◽  
Vol 47 (17) ◽  
pp. 6845-6888 ◽  
Author(s):  
Simone Bertolazzi ◽  
Marco Gobbi ◽  
Yuda Zhao ◽  
Claudia Backes ◽  
Paolo Samorì
Keyword(s):  
Transition Metal ◽  
Transition Metal Dichalcogenides ◽  
Chemical Properties ◽  
Two Dimensional ◽  
Multifunctional Materials ◽  
Molecular Chemistry ◽  
Physico Chemical ◽  
Metal Dichalcogenides

A variety of molecular chemistry approaches are currently investigated for tailoring the physico-chemical properties of ultrathin transition metal dichalcogenides towards novel hybrid multifunctional materials and devices.

Strong coupling in two-dimensional materials-based nanostructures: a review

2022 ◽  
Author(s):  
Ye Ming Qing ◽  
Yongze Ren ◽  
Dangyuan Lei ◽  
Hui Feng Ma ◽  
Tie Jun Cui
Keyword(s):  
Strong Coupling ◽  
Coupling Effect ◽  
Transition Metal Dichalcogenides ◽  
Hybrid Nanostructures ◽  
Two Dimensional ◽  
Strong Light ◽  
Two Dimensional Materials ◽  
Potential Applications ◽  
Metal Dichalcogenides ◽  
Emission Behavior

Abstract Strong interaction between electromagnetic radiation and matter leads to the formation of hybrid light-matter states, making the absorption and emission behavior different from those of the uncoupled states. Strong coupling effect results in the famous Rabi splitting and the emergence of new polaritonic eigenmodes, exhibiting spectral anticrossing behavior and unique energy-transfer properties. In recent years, there has been a rapidly increasing number of works focusing on strong coupling between nanostructures and two-dimensional materials (2DMs), because of the exceptional properties and applications they demonstrate. Here, we review the significant recent advances and important developments of strong light-matter interactions in 2DMs-based nanostructures. We adopt the coupled oscillator model to describe the strong coupling and give an overview of various hybrid nanostructures to realize this regime, including graphene-based nanostructures, black phosphorus-based nanostructures, transition-metal dichalcogenides-based nanostructures, etc. In addition, we discuss potential applications that can benefit from these effects and conclude our review with a perspective on the future of this rapidly emerging field.

scholarly journals An emerging Janus MoSeTe material for potential applications in optoelectronic devices

2019 ◽  
Vol 7 (39) ◽  
pp. 12312-12320 ◽  
Author(s):  
Xiaoyong Yang ◽  
Deobrat Singh ◽  
Zhitong Xu ◽  
Ziwei Wang ◽  
Rajeev Ahuja
Keyword(s):  
First Principles ◽  
Transition Metal Dichalcogenides ◽  
Chemical Properties ◽  
Detailed Comparison ◽  
Physical And Chemical Properties ◽  
First Principles Calculations ◽  
Potential Applications ◽  
Metal Dichalcogenides ◽  
Physical And Chemical ◽  
And Chemical Properties

Motivated by the extraordinary physical and chemical properties of Janus transition-metal dichalcogenides (TMDs) due to the change of the crystal field originating from their asymmetry structures, the electronic and optical properties of the MoSeTe monolayer in 2H and 1T phases are systematically studied by first-principles calculations, and a detailed comparison with the parental MoSe2 and MoTe2 monolayer is made.

scholarly journals Synthesis of MoS2 Thin Film by Ionized Jet Deposition: Role of Substrate and Working Parameters

Surfaces ◽  
2020 ◽  
Vol 3 (4) ◽  
pp. 683-693
Author(s):  
Amir Ghiami ◽  
Melanie Timpel ◽  
Andrea Chiappini ◽  
Marco Vittorio Nardi ◽  
Roberto Verucchi
Keyword(s):  
Thin Film ◽  
Silicon Oxide ◽  
Transition Metal Dichalcogenides ◽  
Chemical Properties ◽  
Operating Conditions ◽  
Processing Efficiency ◽  
Ablation Efficiency ◽  
Thin Film Fabrication ◽  
Metal Dichalcogenides ◽  
Working Parameters

The lack of scalable synthesis of transition metal dichalcogenides, such as molybdenum disulfide (MoS2), has proved to be a significant bottleneck in realization of fundamental devices and has hindered the commercialization of these materials in technologically relevant applications. In this study, a cost-efficient and versatile thin-film fabrication technique based on ionized jet deposition (IJD), i.e., a technique potentially providing high processing efficiency and scalability, is used to grow MoS2 thin films on silicon substrates. The operating conditions of IJD were found to influence mainly the ablation efficiency of the target and only slightly the quality of the deposited MoS2 thin film. All as-deposited films show chemical properties typical of MoS2 with an excess of free, elemental sulfur that can be removed by post-deposition annealing at 300–400 °C, which also promotes MoS2 crystallization. The formation of an interface comprised of several silicon oxide species was observed between MoS2 and the silicon substrate, which is suggested to originate from etching and oxidizing processes of dissociated water molecules in the vacuum chamber during growth. The present study paves the way to further design and improve the IJD approach for TMDC-based devices and other relevant technological applications.

Evaluation of Sputtering Deposited 2-Dimensional MoS2 Film by Raman Spectroscopy

2015 ◽  
Vol 1781 ◽  
pp. 11-16 ◽  
Author(s):  
S. Ishihara ◽  
K. Suda ◽  
Y. Hibino ◽  
N. Sawamoto ◽  
T. Ohashi ◽  
...  
Keyword(s):  
Raman Spectroscopy ◽  
Photoelectron Spectroscopy ◽  
Transition Metal Dichalcogenides ◽  
Chemical Properties ◽  
Peak Frequency ◽  
Flexible Displays ◽  
Optical And Electronic Properties ◽  
Raman Modes ◽  
Metal Dichalcogenides ◽  
Physical And Chemical

ABSTRACTMolybdenum disulfide (MoS2), one of the transition-metal dichalcogenides, is a 2-dimensional semiconducting material that has a layered structure. Owing to excellent optical and electronic properties, the ultra-thin MoS2 film is expected to be used for various devices, such as transistors and flexible displays. In this study, we investigated the physical and chemical properties of sputtered-MoS2 film in the sub-10-nm region by Raman spectroscopy and X-ray photoelectron spectroscopy (XPS). As the results of Raman spectroscopy investigations, we observed two Raman modes, E12g and A1g, in the 2-dimensional MoS2 films. As the thickness of the MoS2 film decreased, the peak frequency difference between E12g and A1g modes increased. From the XPS investigations, we confirmed sulfur reductions from the 2-dimensional MoS2 films. Therefore, we considered that the sulfur vacancies in the MoS2 film affected the Raman peak positions. Moreover, we performed the additional sulfurization of sputtered-MoS2 films. From the XPS and Raman investigations, the quality of the sputtered-MoS2 films was improved by the additional sulfurization.

Recent advances of stimuli-responsive systems based on transition metal dichalcogenides for smart cancer therapy

2019 ◽  
Vol 7 (16) ◽  
pp. 2588-2607 ◽  
Author(s):  
Ruxin Zhou ◽  
Shuang Zhu ◽  
Linji Gong ◽  
Yanyan Fu ◽  
Zhanjun Gu ◽  
...  
Keyword(s):  
Cancer Therapy ◽  
Transition Metal ◽  
Therapeutic Strategy ◽  
Transition Metal Dichalcogenides ◽  
Stimuli Responsive ◽  
Comprehensive Overview ◽  
Responsive Systems ◽  
Recent Advances ◽  
Metal Dichalcogenides

A comprehensive overview of the development of stimuli-responsive TMDC-based nanoplatforms for “smart” cancer therapy is presented to demonstrate a more intelligent and better controllable therapeutic strategy.

scholarly journals Interlayer exciton formation, relaxation, and transport in TMD van der Waals heterostructures

2021 ◽  
Vol 10 (1) ◽  
Author(s):  
Ying Jiang ◽  
Shula Chen ◽  
Weihao Zheng ◽  
Biyuan Zheng ◽  
Anlian Pan
Keyword(s):  
Integrated Circuits ◽  
Integrated Circuit ◽  
Van Der Waals ◽  
Transition Metal Dichalcogenides ◽  
Band Alignment ◽  
Great Promise ◽  
Comprehensive Overview ◽  
Potential Applications ◽  
Metal Dichalcogenides ◽  
Population Recombination

AbstractVan der Waals (vdW) heterostructures based on transition metal dichalcogenides (TMDs) generally possess a type-II band alignment that facilitates the formation of interlayer excitons between constituent monolayers. Manipulation of the interlayer excitons in TMD vdW heterostructures holds great promise for the development of excitonic integrated circuits that serve as the counterpart of electronic integrated circuits, which allows the photons and excitons to transform into each other and thus bridges optical communication and signal processing at the integrated circuit. As a consequence, numerous studies have been carried out to obtain deep insight into the physical properties of interlayer excitons, including revealing their ultrafast formation, long population recombination lifetimes, and intriguing spin-valley dynamics. These outstanding properties ensure interlayer excitons with good transport characteristics, and may pave the way for their potential applications in efficient excitonic devices based on TMD vdW heterostructures. At present, a systematic and comprehensive overview of interlayer exciton formation, relaxation, transport, and potential applications is still lacking. In this review, we give a comprehensive description and discussion of these frontier topics for interlayer excitons in TMD vdW heterostructures to provide valuable guidance for researchers in this field.

scholarly journals Synthesis of Transition Metal Dichalcogenides based hybrid nanostructures by thermal decomposition method

2021 ◽  
Vol 2070 (1) ◽  
pp. 012095
Author(s):  
Melbin Baby ◽  
K. Rajeev Kumar
Keyword(s):  
Electron Microscopy ◽  
Thermal Decomposition ◽  
Decomposition Method ◽  
Transition Metal Dichalcogenides ◽  
Hybrid Nanostructures ◽  
Hybrid Nanostructure ◽  
X Ray Diffraction ◽  
X Ray ◽  
Thermal Decomposition Method ◽  
Metal Dichalcogenides

Abstract In this work, we report synthesis of hybrid nanostructures of Transition Metal Dichalcogenides via thermal decomposition method. Ammonium tetrathiomolybdate was used as not only growth templates but also as starting precursor for synthesis of hybrid nanostructures. The conditions for the synthesizing method were optimized using electron microscopy and x-ray diffraction. In this hybrid nanostructure synthesis, it was found that MoO3 nanorods are interspersed on exfoliated MoS2 nanosheets. The structural and optical properties of the hybrid nanostructure were investigated using transmission electron microscopy (TEM), Scanning electron microscopy (SEM), X-ray diffraction (XRD), Raman spectroscopy and Ultraviolet Visible spectrophotometry (UV-VIS). The hybrid nanostructure of MoO3 on MoS2 shows a band gap of 2.2 eV. It was also found that by tuning the preparation parameters viz temperature of heating and time of heating, the composition of the hybrid nanostructure can be varied.

Gate-tunable trion binding energy in monolayer MoS2 with plasmonic superlattice

Nanoscale ◽  
2020 ◽  
Vol 12 (34) ◽  
pp. 17754-17761
Author(s):  
Zhuang Luo ◽  
Hao Jia ◽  
Liu Lv ◽  
Quan Wang ◽  
Xiaohong Yan
Keyword(s):  
Transition Metal Dichalcogenides ◽  
Optoelectronic Devices ◽  
Chemical Properties ◽  
Physical And Chemical Properties ◽  
Two Dimensional ◽  
Monolayer Mos2 ◽  
The World ◽  
Metal Dichalcogenides ◽  
Physical And Chemical ◽  
And Chemical Properties

Two-dimensional transition metal dichalcogenides exhibit promising potential and attract the attention of the world in the application of optoelectronic devices owing to their distinctive physical and chemical properties.

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