Fast pseudocapacitive reactions of three-dimensional manganese dioxide structures synthesized via self-limited redox deposition on microwave-expanded graphite oxide

RSC Advances ◽  
2016 ◽  
Vol 6 (10) ◽  
pp. 8330-8335 ◽  
Author(s):  
Wencong Zeng ◽  
Yuan Zhao ◽  
Kun Ni ◽  
Yanwu Zhu
Keyword(s):  
Manganese Dioxide ◽  
Graphite Oxide ◽  
Redox Reaction ◽  
Three Dimensional ◽  
Expanded Graphite ◽  
3D Structures

Self-limited redox reaction between KMnO4 and microwave-expanded graphite oxide was utilized to deposit birnessite-type MnO2 3D structures on the surface of MEGO.

From Levinthal’s Paradox to the Effects of Cell Environmental Perturbation on Protein Folding

2020 ◽  
Vol 26 (42) ◽  
pp. 7537-7554 ◽  
Author(s):  
Juan Zeng ◽  
Zunnan Huang
Keyword(s):  
Protein Folding ◽  
Posttranslational Modifications ◽  
Three Dimensional ◽  
Rational Drug Design ◽  
Basic Knowledge ◽  
Sequence Evolution ◽  
3D Structures ◽  
Folding Mechanism ◽  
Cellular Environment ◽  
Environment Temperature

Background: The rapidly increasing number of known protein sequences calls for more efficient methods to predict the Three-Dimensional (3D) structures of proteins, thus providing basic knowledge for rational drug design. Understanding the folding mechanism of proteins is valuable for predicting their 3D structures and for designing proteins with new functions and medicinal applications. Levinthal’s paradox is that although the astronomical number of conformations possible even for proteins as small as 100 residues cannot be fully sampled, proteins in nature normally fold into the native state within timescales ranging from microseconds to hours. These conflicting results reveal that there are factors in organisms that can assist in protein folding. Methods: In this paper, we selected a crowded cell-like environment and temperature, and the top three Posttranslational Modifications (PTMs) as examples to show that Levinthal’s paradox does not reflect the folding mechanism of proteins. We then revealed the effects of these factors on protein folding. Results: The results summarized in this review indicate that a crowded cell-like environment, temperature, and the top three PTMs reshape the Free Energy Landscapes (FELs) of proteins, thereby regulating the folding process. The balance between entropy and enthalpy is the key to understanding the effect of the crowded cell-like environment and PTMs on protein folding. In addition, the stability/flexibility of proteins is regulated by temperature. Conclusion: This paper concludes that the cellular environment could directly intervene in protein folding. The long-term interactions of the cellular environment and sequence evolution may enable proteins to fold efficiently. Therefore, to correctly understand the folding mechanism of proteins, the effect of the cellular environment on protein folding should be considered.

Fabrication of bio-inspired 3D nanoimprint mold using acceleration-voltage-modulation electron-beam lithography

2019 ◽  
Vol 8 (3-4) ◽  
pp. 289-297 ◽  
Author(s):  
Kohei Goto ◽  
Jun Taniguchi
Keyword(s):  
Electron Beam ◽  
Electron Beam Lithography ◽  
Three Dimensional ◽  
Modulation Method ◽  
Imprint Lithography ◽  
3D Structures ◽  
Rose Petal ◽  
Rose Petals ◽  
Acceleration Voltage ◽  
Nano Imprint

Abstract Methods for fabricating micro- and nanoscale three-dimensional (3D) structures such as electron-beam lithography (EBL) attracted attention in various fields. In EBL, an acceleration-voltage modulation method can be used to control the developing depth of the structure. In this study, we fabricated a rose petal structure using acceleration-voltage modulation. Using a rose petal mold, plastic- and silver-duplicated rose petals were prepared using nano-imprint lithography (NIL). We demonstrated that various complex 3D structures and materials can be duplicated using NIL by applying an acceleration-voltage modulation method.

scholarly journals Additive lattice kirigami

2016 ◽  
Vol 2 (9) ◽  
pp. e1601258 ◽  
Author(s):  
Toen Castle ◽  
Daniel M. Sussman ◽  
Michael Tanis ◽  
Randall D. Kamien
Keyword(s):  
Gaussian Curvature ◽  
Three Dimensional ◽  
Complex Structures ◽  
3D Structures ◽  
Flat Sheet ◽  
Simple Rules ◽  
New Material ◽  
3D Shapes ◽  
Huge Variety

Kirigami uses bending, folding, cutting, and pasting to create complex three-dimensional (3D) structures from a flat sheet. In the case of lattice kirigami, this cutting and rejoining introduces defects into an underlying 2D lattice in the form of points of nonzero Gaussian curvature. A set of simple rules was previously used to generate a wide variety of stepped structures; we now pare back these rules to their minimum. This allows us to describe a set of techniques that unify a wide variety of cut-and-paste actions under the rubric of lattice kirigami, including adding new material and rejoining material across arbitrary cuts in the sheet. We also explore the use of more complex lattices and the different structures that consequently arise. Regardless of the choice of lattice, creating complex structures may require multiple overlapping kirigami cuts, where subsequent cuts are not performed on a locally flat lattice. Our additive kirigami method describes such cuts, providing a simple methodology and a set of techniques to build a huge variety of complex 3D shapes.

Hybrid 3D structures of ZnO nanoflowers and PdO nanoparticles as a highly selective methanol sensor

The Analyst ◽  
2016 ◽  
Vol 141 (10) ◽  
pp. 2977-2989 ◽  
Author(s):  
D. Acharyya ◽  
K. Y. Huang ◽  
P. P. Chattopadhyay ◽  
M. S. Ho ◽  
H.-J. Fecht ◽  
...  
Keyword(s):  
Nickel Oxide ◽  
Three Dimensional ◽  
Palladium Oxide ◽  
3D Structures ◽  
Methanol Sensor

The present study concerns the enhancement of methanol selectivity of three dimensional (3D) nanoflowers (NFs) of ZnO by dispersing nickel oxide (NiO) and palladium oxide (PdO) nanoparticles on the surface of the nanoflowers to form localized hybrid nano-junctions.

4D printing of a self-morphing polymer driven by a swellable guest medium

Soft Matter ◽  
2018 ◽  
Vol 14 (5) ◽  
pp. 765-772 ◽  
Author(s):  
Jheng-Wun Su ◽  
Xiang Tao ◽  
Heng Deng ◽  
Cheng Zhang ◽  
Shan Jiang ◽  
...  
Keyword(s):  
Tissue Engineering ◽  
Flexible Electronics ◽  
Three Dimensional ◽  
Advanced Materials ◽  
Soft Robotics ◽  
4D Printing ◽  
3D Structures

There is a significant need of advanced materials that can be fabricated into functional devices with defined three-dimensional (3D) structures for application in tissue engineering, flexible electronics, and soft robotics.

scholarly journals Key Issues in Modeling of Complex 3D Structures from Video Sequences

2012 ◽  
Vol 2012 ◽  
pp. 1-17 ◽  
Author(s):  
Shengyong Chen ◽  
Yuehui Wang ◽  
Carlo Cattani
Keyword(s):  
Basic Principle ◽  
Video Analysis ◽  
Structure From Motion ◽  
State Of The Art ◽  
Three Dimensional ◽  
Video Sequences ◽  
3D Structures ◽  
Uncalibrated Camera ◽  
Key Issues ◽  
Scene Object

Construction of three-dimensional structures from video sequences has wide applications for intelligent video analysis. This paper summarizes the key issues of the theory and surveys the recent advances in the state of the art. Reconstruction of a scene object from video sequences often takes the basic principle of structure from motion with an uncalibrated camera. This paper lists the typical strategies and summarizes the typical solutions or algorithms for modeling of complex three-dimensional structures. Open difficult problems are also suggested for further study.

scholarly journals PP/PP-g-MAH/layered expanded graphite oxide nanocomposites prepared via masterbatch process

2013 ◽  
Vol 130 (4) ◽  
pp. 3025-3025 ◽  
Author(s):  
Jun Bian ◽  
Xiao Wei Wei ◽  
Hai Lan Lin ◽  
I Ta Chang ◽  
Erol Sancaktar
Keyword(s):  
Graphite Oxide ◽  
Expanded Graphite
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