scholarly journals Facile Fabrication of SrTiO3@MoS2 Composite Nanofibers for Excellent Photodetector Application

2020 ◽  
Vol 2020 ◽  
pp. 1-7
Author(s):  
Jinghong Li ◽  
Lun Zhang ◽  
Di Wang ◽  
Ran Wang ◽  
Xiujuan Liu ◽  
...  
Keyword(s):  
Composite Nanofibers ◽  
Photocurrent Density ◽  
Transition Metal Dichalcogenide ◽  
Valence Electron Structure ◽  
Suitable Material ◽  
Photoelectric Performance ◽  
Novel Material ◽  
New Ideas ◽  
Facile Fabrication ◽  
Inorganic Nanomaterials

Molybdenum disulfide (MoS2), as a kind of transition metal dichalcogenide, has been widely studied for its excellent compatibility with most of inorganic nanomaterials. Nevertheless, its microscale and agglomeration limit the performance severely. Therefore, the special structure of V-MoS2 has drawn a lot of interest, which can not only reduce the size of MoS2 nanosheets but also improve the valence electron structure of the materials. In this work, SrTiO3@MoS2 composite nanofibers were synthesized by the simple electrospinning and hydrothermal method, and it was applied as a novel material for photodetector. SEM, TEM, EDX, XRD, I-T curves, and EIS analysis were used to study the structure and properties of the prepared SrTiO3@MoS2 composite nanofibers. Simulating under sunlight at a potential of 1.23 V, the prepared composite materials exhibited a superior photoelectric performance of photocurrent density of 21.4 μA and a resistance of 2.3 Ω. These results indicate that the composite of SrTiO3 nanofiber adhered with V-MoS2 has a stable composite structure, good electrical conductivity, and photoelectric sensitivity and is a suitable material for photodetectors. This work provides new ideas for the preparation of self-assembled materials and their application in photodetectors.

scholarly journals Graphene Quantum Dots Decorated Al-doped ZnS for Improved Photoelectric Performance

Materials ◽  
2018 ◽  
Vol 11 (8) ◽  
pp. 1452 ◽  
Author(s):  
Zheng Zhang ◽  
Yun Lei ◽  
Liyang Zhao ◽  
Zicong Jiang ◽  
Zhong Ouyang
Keyword(s):  
Quantum Dots ◽  
Graphene Quantum Dots ◽  
Photogenerated Electron ◽  
Photocurrent Density ◽  
Spectroscopic Techniques ◽  
Solvothermal Process ◽  
Al Doping ◽  
Photogenerated Electrons ◽  
Photoelectric Performance ◽  
Conducting Materials

Graphene quantum dots (GQDs) decorated Al-doped ZnS composites were prepared using the solvothermal process, and the hydrothermal method was used to prepare GQDs. Various spectroscopic techniques were used to characterize the products, and the results show that Al-ZnS attached GQD composites present lattice fringes that can be assigned to ZnS and GQDs, respectively. The absorption peaks of Al-ZnS/GQDs are red-shifted because of the doping of aluminum and the incorporation of GQDs. The luminescence intensity of Al-ZnS/GQDs shows a downward trend with the addition of GQDs. As the GQD content changes from 0.6 wt % to 1.8 wt %, the photocurrent density achieves a maximum at the addition of 1.2 wt %. The photocurrent of Al-ZnS/GQDs composites are about 700% and 200% of pure ZnS and Al-ZnS, respectively. The results indicate that Al doping can reduce the energy bandgap of ZnS and produce more photogenerated electrons. The photogenerated electrons from Al-ZnS can be extracted and transferred to GQDs, which act as conducting materials to decrease the recombination rate and improve the photogenerated electron-transfer.

Preparation of CdSe-TiO2 Nanotube Array Films and their Photoelectric Properties under Visible Light

2013 ◽  
Vol 743-744 ◽  
pp. 932-936
Author(s):  
Fei Yang ◽  
Wei Liang ◽  
Jin Bo Xue
Keyword(s):  
Composite Films ◽  
Photocurrent Density ◽  
Cubic Phase ◽  
X Ray Diffraction ◽  
Nanotube Array ◽  
X Ray ◽  
Photoelectric Properties ◽  
Photoelectric Performance ◽  
Anodic Oxidation Method ◽  
20 Nm

In this paper, CdSe-TiO2nanotube array composite films were successfully prepared through a two-steps method. TiO2nanotube arrays were firstly prepared by anodic oxidation method, based on which the composite films of CdSe-TiO2nanotubes arrays were prepared by electrochemical deposition. The influence of the concentration of SeO2on the structure and photoelectric performance of the composite films were studied by X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM) and photocurrent response tests. The results show that the cubic phase CdSe particles with the size of about 15~20 nm were uniformly distributed in highly ordered TiO2nanotubes and around the mouths of the nanotubes; With the increasing of concentration of SeO2, the content of CdSe increases gradually while the photocurrent density of the composite films increased and decreased, The optimal photoelectric performance of composite films were obtained when the SeO2concentration was 4 mmol/L.

scholarly journals The MoSeS dynamic omnigami paradigm for smart shape and composition programmable 2D materials

2019 ◽  
Vol 10 (1) ◽  
Author(s):  
Joel Berry ◽  
Simeon Ristić ◽  
Songsong Zhou ◽  
Jiwoong Park ◽  
David J. Srolovitz
Keyword(s):  
Electric Fields ◽  
Flexible Electronics ◽  
2D Materials ◽  
Strain Engineering ◽  
Transition Metal Dichalcogenide ◽  
3D Objects ◽  
Novel Material ◽  
Shape Programming ◽  
Composition Programming ◽  
New Applications

AbstractThe properties of 2D materials can be broadly tuned through alloying and phase and strain engineering. Shape programmable materials offer tremendous functionality, but sub-micron objects are typically unachievable with conventional thin films. Here we propose a new approach, combining phase/strain engineering with shape programming, to form 3D objects by patterned alloying of 2D transition metal dichalcogenide (TMD) monolayers. Conjugately, monolayers can be compositionally patterned using non-flat substrates. For concreteness, we focus on the TMD alloy MoSe$${}_{2c}$$2cS$${}_{2(1-c)}$$2(1−c); i.e., MoSeS. These 2D materials down-scale shape/composition programming to nanoscale objects/patterns, provide control of both bending and stretching deformations, are reversibly actuatable with electric fields, and possess the extraordinary and diverse properties of TMDs. Utilizing a first principles-informed continuum model, we demonstrate how a variety of shapes/composition patterns can be programmed and reversibly modulated across length scales. The vast space of possible designs and scales enables novel material properties and thus new applications spanning flexible electronics/optics, catalysis, responsive coatings, and soft robotics.

scholarly journals Polymer Graphite Pencil Lead as a Cheap Alternative for Classic Conductive SPM Probes

Nanomaterials ◽  
2019 ◽  
Vol 9 (12) ◽  
pp. 1756 ◽  
Author(s):  
Alexandr Knápek ◽  
Dinara Sobola ◽  
Daniel Burda ◽  
Aleš Daňhel ◽  
Marwan Mousa ◽  
...  
Keyword(s):  
Scanning Tunneling ◽  
Binding Agent ◽  
Tunneling Microscopy ◽  
Tunneling Microscope ◽  
Suitable Material ◽  
Potential Applications ◽  
Cheap Alternative ◽  
Novel Material ◽  
Pencil Lead ◽  
Graphite Rods

This paper presents polymer graphite (PG) as a novel material for the scanning tunneling microscopy (STM) probe. Conductive PG is a relatively modern nanocomposite material used for micro-pencil refills containing a polymer-based binding agent and graphite flakes. Its high conductivity and immunity against surface contamination, with a low price, make it seem like a highly suitable material for electrode manufacturing in general. For the tip production, three methods were developed and are further described in the paper. For the production, three commercially available polymer graphite rods were used. Each has been discussed in terms of performance within the tunneling microscope and within other potential applications.

New Ideas about Hypnotic Therapy

1958 ◽  
Vol 3 (12) ◽  
pp. 364-365
Author(s):  
MARTIN T. ORNE
Keyword(s):  
New Ideas

Tutoring: Some New Ideas

1978 ◽  
Author(s):  
Carol Taylor Fitz-Gibbon
Keyword(s):  
New Ideas
Sign in / Sign up

Export Citation Format

Share Document