Results 61 to 70 of about 2,168 (254)

Strain‐Adaptive Dielectric Metamaterials via Bioinspired “Ligament‐Bone” Architecture for Ultrahigh‐Energy Capacitive Storage

Advanced Science, EarlyView.
A bioinspired strain‐adaptive ligament‐bone architecture achieves record‐high energy density of 26.1 J cm−3 and 90% efficiency at 600 MV m−1, coupled with a Young's modulus of 2.13 GPa. ABSTRACT Polymer dielectrics for capacitive energy storage face fundamental trade‐offs between breakdown strength, energy density, efficiency, and mechanical robustness.
Jian Wang, Xinyu Wang, Jiabao Wang, Biyun Peng, Yifei Zhang, Ning Zhu, Xin Hu   +6 more
wiley   +1 more source

Metátese de olefinas no Brasil: "Brazil is romping it!" Olefin metathesis in Brazil: Brazil is romping it!

Química Nova, 2007
Some aspects of the olefin metathesis reactions are summarized here (types of reactions, mechanism and catalysts). In particular, the research groups that have been working on this chemistry in Brazil are presented. The main goal of this paper is to make
José Milton E. Matos, Nouga C. Batista, Rogério M. Carvalho, Sirlane A. A. Santana, Paula N. Puzzi, Mário Sanches, Benedito S. Lima-Neto   +6 more
doaj   +1 more source

The Influence of Residual Ion Drift During Programming of Chip‐Integrated Nanoscale HfO2‐Based Memristive Devices

Advanced Electronic Materials, EarlyView.
1T1R‐arrays combining filamentary‐type memristors and CMOS transistors offer great potential for energy‐efficient analog hardware accelerators. Here, transient SET analysis of nanoscale HfO2 memristors integrated on 180 nm CMOS wafers is discussed.
Oliver Artner, Felix Cüppers, Seokki Son, Yang Chen, Xiaohua Liu, Christopher Bengel, Dennis Nielinger, André Zambanini, Stefan Wiefels, Stephan Menzel, Regina Dittmann, Susanne Hoffmann‐Eifert   +11 more
wiley   +1 more source

Synthesis and Ring-Opening Metathesis Polymerization of Second-Generation Dendronized Poly(ether) Monomers Initiated by Ruthenium Carbenes

Oil & Gas Science and Technology, 2016
The Ring-Opening Metathesis Polymerization (ROMP) of second-generation dendronized monomers is described. Using the highly active and fast-initiating third-generation ruthenium complex [(H2IMes)(pyr)2Cl2RuCHPh], moderate to high molecular weight polymers
Guzmán Pablo E., Piunova Victoria A., Miyake Garret M., Grubbs Robert H.   +3 more
doaj   +1 more source

Increasing community capacity to prevent childhood obesity: challenges, lessons learned and results from the Romp & Chomp intervention

BMC Public Health, 2010
Background Obesity is a major public health issue; however, only limited evidence is available about effective ways to prevent obesity, particularly in early childhood.
de Groot Florentine P, Robertson Narelle M, Swinburn Boyd A, de Silva-Sanigorski Andrea M   +3 more
doaj   +1 more source

Fabrication of Composite Cathode for All‐Solid‐State Sodium Batteries

Advanced Energy Materials, EarlyView.
The design of composite cathodes for all‐solid‐state sodium batteries must address three critical challenges—interfacial side reactions, interfacial delamination, and highly tortuous transport pathways. This work outlines structural and interfacial strategies to optimize ion transport and mechanical stability, enabling durable, and high‐performance ...
Gaoming Sun, Yuan Ma, Hehe Zhang, Shengan Wu, Shiyong Chu, Stefano Passerini, Yanjiao Ma   +6 more
wiley   +1 more source

Incorporating supramolecular motifs into macromolecular backbones via entropy-driven ring-opening metathesis polymerization: a case study on benzene-1,3,5-tricarboxamides

Giant
The incorporation of supramolecular motifs into polymer architectures provides a versatile route to creating macromolecular systems with precise structures and customized properties.
Qingqing Han, Haoxuan Li, Zeyu Wang, Tingxuan Chen, Taolin Sun, Cunluo Wu, Yiliu Liu   +6 more
doaj   +1 more source

Stereochemistry of ring-opening/cross metathesis reactions of exo- and endo-7-oxabicyclo[2.2.1]hept-5-ene-2-carbonitriles with allyl alcohol and allyl acetate

Beilstein Journal of Organic Chemistry, 2015
The ROCM reactions of exo- and endo-2-cyano-7-oxanorbornenes with allyl alcohol or allyl acetate promoted by different ruthenium alkylidene catalysts were studied. The stereochemical outcome of the reactions was established. The issues concerning chemo- (
Piotr Wałejko, Michał Dąbrowski, Lech Szczepaniak, Jacek W. Morzycki, Stanisław Witkowski   +4 more
doaj   +1 more source

From Materials to Systems: Challenges and Solutions for Fast‐Charge/Discharge Na‐Ion Batteries

Advanced Energy Materials, EarlyView.
This review systematically analyzes the key characteristics limiting the fast‐charge/discharge capability of Na‐ion batteries (SIBs) from a multi‐scale perspective encompassing electrode materials, the electrode‐electrolyte interface, and the system. Furthermore, it presents practical solution strategies for the fundamental issues arising at each scale,
Bonyoung Ku, Sangbin Park, Sunha Hwang, Sunghyun Lim, Won‐Sub Yoon, Jongsoon Kim   +5 more
wiley   +1 more source

Tailoring the mechanical and thermal properties of dicyclopentadiene polyHIPEs with the use of a comonomer

eXPRESS Polymer Letters, 2015
The effect of adding a comonomer to dicyclopentadiene in high internal phase emulsions (HIPEs) on the properties of ring-opening metathesis polymerisation (ROMP) derived polyHIPEs has been investigated.
E. H. Mert, C. Slugovc, P. Krajnc
doaj   +1 more source