Search for heavy resonances decaying into a W or Z boson and a Higgs boson in final states with leptons and b-jets in 36 fb(-1) of root s=13 TeV pp collisions with the ATLAS detector

A search is conducted for new resonances decaying into a W or Z boson and a 125 GeV Higgs boson in the νν¯¯¯bb¯¯, ℓ±νbb¯¯, and ℓ+ℓ−bb¯¯ final states, where ℓ± = e± or μ±, in pp collisions at s√=13 TeV. The data used correspond to a total integrated luminosity of 36.1 fb−1 collected with the ATLAS detector at the Large Hadron Collider during the 2015 and 2016 data-taking periods. The search is conducted by examining the reconstructed invariant or transverse mass distributions of W h and Zh candidates for evidence of a localised excess in the mass range of 220 GeV up to 5 TeV. No significant excess is observed and the results are interpreted in terms of constraints on the production cross-section times branching fraction of heavy W ′ and Z′ resonances in heavy-vector-triplet models and the CP-odd scalar boson A in two-Higgs-doublet models. Upper limits are placed at the 95% confidence level and range between 9.0 × 10−4 pb and 7.3 × 10−1 pb depending on the model and mass of the resonance

Hydrogelators of cyclotriveratrylene derivatives

NSF of China [20835005]; MOST of China [2011CB910403]; Natural Science Foundation of Fujian Province [2011J01061]Developing cavity-based supramolecular hydrogels is in its infancy because not many such hydrogelators are available. Reported herein is our creation of rigid cavitand cyclotriveratrylene (CTV) based hydrogelators from the molecular backbones of CTVs that were in limited cases shown to form organogels. For doing so deprotonable-COOH or protonable-NH2 was introduced as terminal group into the rigid and hydrophobic CTV backbones. We thus successfully obtained optically anisotropic supramolecular hydrogels from these new CTVs hydrogelators with excellent thermostability and high tolerance towards strong electrolytes. The obtained CTV-1 and CTV-2 hydrogels are luminescent and exhibit reversible gel-to-sol and sol-to-gel transitions upon pH variations. The success in creating CTV-1 and CTV-2 hydrogelators on the basis of the skeleton of a CTV-organogelator suggests that balancing the hydrophilic and hydrophobic characters of the ionic and hydrophobic moieties well in the gelator molecule is important for designing a promising hydrogelator

Preparation and Electrochemical Performance of Hollow Carbon Spheres/Sulfur Composite

采用PMMA为模板制备碳空心球材料，并以碳空心球材料为导电骨架与硫材料复合制得碳空心球/硫复合材料. SEM和TEM照片显示，硫材料能均匀地填充在碳空心球的孔道和腔体内部. 采用恒电流充放电测试碳空心球/硫复合电极的电化学性能. 结果表明，在100 mA·g-1、500 mA·g-1、1 A·g-1、2 A·g-1 和5 A·g-1电流密度下，碳空心球/硫复合电极可逆放电容量分别为1145 mAh·g-1、824 mAh·g-1、702 mAh·g-1、586 mAh·g-1和395 mAh·g-1，呈现出较优异的倍率循环寿命.Hollow carbon spheres were prepared by the PMMA template. Hollow carbon spheres/sulfur composite was made from sulfur and hollow carbon spheres as a conducting framework. The results of SEM and TEM showed that sulfur was uniformly filled in both of the shell and hollow core of hollow carbon spheres. The electrochemical performance of hollow carbon spheres/sulfur composite was characterized by the charge/discharge method. The results showed the excellent rate and cycle performance of hollow carbon spheres/sulfur composite. The reversible capacities of hollow carbon spheres/sulfur composite are 1145 mAh·g-1, 824 mAh·g-1, 702 mAh·g-1, 586 mAh·g-1 and 395 mAh·g-1 at the current densities of 100 mA·g-1, 500 mA·g-1, 1 A·g-1, 2 A·g-1 and 5 A·g-1, respectively.国家自然科学基金项目（No. 200933005，No. 21021002）、973项目（No. 2009CB220102）和厦门市纯电动汽车重大专项（No. 3502Z20121002）资助作者联系地址：1. 厦门大学 固体表面物理化学国家重点实验室，化学化工学院化学系，福建 厦门 361005； 2. 厦门产业技术研究院，福建 厦门，361001Author's Address: 1. State Key Laboratory of Physical Chemistry of Solid Surfaces, Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, Fujian, China; 2. Amoy Institute of Technovation, Xiamen 361001, Fujian, Chin