Facile fabrication of three-dimensional graphene microspheres using β-cyclodextrin aggregates as substrates and their application for midecamycin sensing

RSC Advances ◽  
2015 ◽  
Vol 5 (94) ◽  
pp. 77469-77477 ◽  
Author(s):  
Xiaofei Zhu ◽  
Jingkun Xu ◽  
Xuemin Duan ◽  
Limin Lu ◽  
Kaixin Zhang ◽  
...  
Keyword(s):  
Aqueous Solutions ◽  
Three Dimensional ◽  
Concentrated Aqueous Solutions ◽  
3D Graphene ◽  
Facile Fabrication ◽  
First Time

Three-dimensional (3D) graphene (GR) microspheres have been successfully prepared for the first time using β-cyclodextrin aggregates (β-CDAs) as substrates, which could be easily obtained from concentrated aqueous solutions of β-CD.

A new approach to construct three dimensional segregated graphene structures in rubber composites for enhanced conductive, mechanical and barrier properties

2016 ◽  
Vol 4 (12) ◽  
pp. 2353-2358 ◽  
Author(s):  
Yong Lin ◽  
Shuqi Liu ◽  
Lan Liu
Keyword(s):  
Three Dimensional ◽  
Barrier Properties ◽  
Construction Method ◽  
Rubber Composites ◽  
New Approach ◽  
3D Graphene ◽  
Conductive Rubber ◽  
First Time ◽  
Graphene Structures

A novel pre-construction method was reported for the first time to fabricate conductive rubber composites with a conductive 3D-graphene segregated network.

Sulfur-infiltrated three-dimensional graphene-like material with hierarchical pores for highly stable lithium–sulfur batteries

2014 ◽  
Vol 2 (13) ◽  
pp. 4528-4533 ◽  
Author(s):  
Yunyong Li ◽  
Zesheng Li ◽  
Qinwei Zhang ◽  
Pei Kang Shen
Keyword(s):  
Rational Design ◽  
Discharge Rate ◽  
Three Dimensional ◽  
Rate Performance ◽  
3D Graphene ◽  
Design And Synthesis ◽  
Hierarchical Pores ◽  
Lithium Sulfur Batteries ◽  
First Time ◽  
Lithium Sulfur

A rational design and synthesis of sulphur–carbon nanocomposites by infiltrating into 3D graphene-like material with hierarchical pores has been achieved for the first time; the nanocomposite shows a highly stable capacity and reversible high charge/discharge rate performance.

scholarly journals Experimental Investigation on 3D Graphene-CNT Hybrid Foams with Different Interactions

Nanomaterials ◽  
2018 ◽  
Vol 8 (9) ◽  
pp. 694 ◽  
Author(s):  
Hye-soo Kim ◽  
Stephanie Lee ◽  
Mei Wang ◽  
Junmo Kang ◽  
Yan Sun ◽  
...  
Keyword(s):  
Cetyltrimethylammonium Bromide ◽  
Low Cost ◽  
Scale Up ◽  
Three Dimensional ◽  
Compression Tests ◽  
3D Graphene ◽  
Facile Fabrication ◽  
Ft Ir ◽  
Graphene Foams ◽  
Hybrid Foams

Due to the exceptional properties of graphene, numerous possibilities for real applications in various fields have been provided. However, it is a challenge to fabricate bulk graphene materials with properties arising from the nature of individual graphene sheets, and which assemble into monolithic three-dimensional structures. If 3D structured graphene foam were made instead of 2D structured graphene, it is expected that it would be a facile fabrication, with relatively low cost with the possibility of scale-up, and would maintain the intrinsic properties of graphene. To solve the weaknesses of 2D structured graphene, this study aimed to fabricate a 3D graphene-carbon nanotubes (CNT) hybrid foam. In this study, CNT was used to reinforce the graphene foams. In addition, two different surfactants, known as sodium dodecylbenzene sulphonate (SDBS) and cetyltrimethylammonium bromide (CTAB), were applied to help CNT dispersion. The π–π interaction was induced by SDBS/CNT, while ionic interaction was derived from CTAB/CNT. To confirm the charge effect with different surfactants, SEM, Zeta-potential, FT-IR, Raman spectroscopy, and compression tests were performed. When using a cationic surfactant, CTAB, compressive modulus, and strength increased due to the formation of relatively strong ionic bonding.

scholarly journals Cobalt-based magnetic Weyl semimetals with high-thermodynamic stabilities

2021 ◽  
Vol 7 (1) ◽  
Author(s):  
Wei Luo ◽  
Yuma Nakamura ◽  
Jinseon Park ◽  
Mina Yoon
Keyword(s):  
Tight Binding ◽  
Three Dimensional ◽  
Interlayer Coupling ◽  
First Principles Calculation ◽  
Optimization Approach ◽  
Binding Model ◽  
Nodal Lines ◽  
Weyl Semimetal ◽  
Topological Quantum ◽  
First Time

AbstractRecent experiments identified Co3Sn2S2 as the first magnetic Weyl semimetal (MWSM). Using first-principles calculation with a global optimization approach, we explore the structural stabilities and topological electronic properties of cobalt (Co)-based shandite and alloys, Co3MM’X2 (M/M’ = Ge, Sn, Pb, X = S, Se, Te), and identify stable structures with different Weyl phases. Using a tight-binding model, for the first time, we reveal that the physical origin of the nodal lines of a Co-based shandite structure is the interlayer coupling between Co atoms in different Kagome layers, while the number of Weyl points and their types are mainly governed by the interaction between Co and the metal atoms, Sn, Ge, and Pb. The Co3SnPbS2 alloy exhibits two distinguished topological phases, depending on the relative positions of the Sn and Pb atoms: a three-dimensional quantum anomalous Hall metal, and a MWSM phase with anomalous Hall conductivity (~1290 Ω−1 cm−1) that is larger than that of Co2Sn2S2. Our work reveals the physical mechanism of the origination of Weyl fermions in Co-based shandite structures and proposes topological quantum states with high thermal stability.

scholarly journals Shell-crossing in a ΛCDM Universe

2020 ◽  
Vol 501 (1) ◽  
pp. L71-L75
Author(s):  
Cornelius Rampf ◽  
Oliver Hahn
Keyword(s):  
Dark Matter ◽  
Perturbation Theory ◽  
Large Scale ◽  
Cold Dark Matter ◽  
Three Dimensional ◽  
Random Initial Data ◽  
Recursion Relations ◽  
Indispensable Tool ◽  
First Time ◽  
Very High

ABSTRACT Perturbation theory is an indispensable tool for studying the cosmic large-scale structure, and establishing its limits is therefore of utmost importance. One crucial limitation of perturbation theory is shell-crossing, which is the instance when cold-dark-matter trajectories intersect for the first time. We investigate Lagrangian perturbation theory (LPT) at very high orders in the vicinity of the first shell-crossing for random initial data in a realistic three-dimensional Universe. For this, we have numerically implemented the all-order recursion relations for the matter trajectories, from which the convergence of the LPT series at shell-crossing is established. Convergence studies performed at large orders reveal the nature of the convergence-limiting singularities. These singularities are not the well-known density singularities at shell-crossing but occur at later times when LPT already ceased to provide physically meaningful results.

Facile Fabrication of Novel Magnetic ZIF-67 MOF@Aminated Chitosan Composite Beads for the Adsorptive Removal of Cr(VI) from Aqueous Solutions

2021 ◽  
pp. 118084
Author(s):  
Ahmed M. Omer ◽  
Eman M. Abd El-Monaem ◽  
Mona M. Abd El-Latif ◽  
Gehan M. El-Subruiti ◽  
Abdelazeem S. Eltaweil
Keyword(s):  
Aqueous Solutions ◽  
Adsorptive Removal ◽  
Composite Beads ◽  
Facile Fabrication ◽  
Chitosan Composite

scholarly journals Imaging the Human Thyroid Using Three-Dimensional Diffuse Optical Tomography: A Preliminary Study

2021 ◽  
Vol 11 (4) ◽  
pp. 1670
Author(s):  
Tetsuya Mimura ◽  
Shinpei Okawa ◽  
Hiroshi Kawaguchi ◽  
Yukari Tanikawa ◽  
Yoko Hoshi
Keyword(s):  
Optical Tomography ◽  
Tumor Hypoxia ◽  
Three Dimensional ◽  
Diffuse Optical Tomography ◽  
Element Model ◽  
Needle Aspiration ◽  
Human Thyroid ◽  
Tissue Oxygen Saturation ◽  
Preliminary Study ◽  
First Time

Thyroid cancer is usually diagnosed by ultrasound imaging and fine-needle aspiration biopsy. However, diagnosis of follicular thyroid carcinomas (FTC) is difficult because FTC lacks nuclear atypia and a consensus on histological interpretation. Diffuse optical tomography (DOT) offers the potential to diagnose FTC because it can measure tumor hypoxia, while image reconstruction of the thyroid is still challenging mainly due to the complex anatomical features of the neck. In this study, we attempted to solve this issue by creating a finite element model of the human neck excluding the trachea (a void region). By reconstruction of the absorption coefficients at three wavelengths, 3D tissue oxygen saturation maps of the human thyroid are obtained for the first time by DOT.

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