Preface from Guest Editors Hydrogen Storage Materials

正Hydrogen is a clean,pollution-free energy carrier offering benefits of high volumetric and gravimetric densities of energy storage,when stored in hydrides.The growing world-wide use of renewable energy in combination with the well commercially developed technologies of water splitting and unlimited resources of water in the hydrosphere,creates a backbone for the growth of hydrogen     

Preface from guest editors

<正>1.Nanomaterials and device It has been widely accepted that,when a material comes to low dimensions,for example,0D quantum dots and hetero-nanocrystals,1D nanowires and nanotubes,2D nanosheets,and 3D hierarchical or branched nanostructures,the associated physical properties will differ from their bulk counterparts,and subsequently will render enhanced or emergent functions.This has generated a fascinating field of"nanomaterials and devices".It is a     

Preface

<正>George Zheng Chenhttp://www.nottingham.ac.uk/~enzgzc,DIC,FRSC,FRSA,FIMMM,is professor of electrochemical technologies in both the UK(Nottingham)and China(Ningbo)campuses of the University of Nottingham.He is also a senior academic visitor of Fudan University and a specially invited professor of Wuhan University of Science and Technology.He     

Preface

The standard model （SM） in particle physics has been successfully tested by the present experimental observations. The SM consists of electroweak unification theory and quantum chromodynamics （QCD） theory with light quarks （u, d, s） and heavy quarks （c, b, t） as its fundamental components. Usually, these quarks are named as the light flavor and the heavy flavor. In addition to quarks, there are intermediate gauge bosons and gluons for mediating the electroweak and strong force, respectively. The heavy-flavor physics consisting of the charm c, bottom b, and top t quarks has been studied from heavy mesons and baryons whose properties are mainly determined by the c and b quarks in the bound state, such as B mesons and D mesons in the heavy-flavor factories （B factory and charm factory）.     

Preface

正All-optical implementations of signal processing have attracted a great deal of attention due to the unique potential of this approach to overcome the bandwidth and speed bottleneck of electronic devices.Many all-optical signal processing techniques,offering processing bandwidths up to several THz,have been proposed and successfully employed in a wide range of areas,such as     

Preface

In the twenty-first century, network and information secu- rity is becoming the critical foundation of cyberspace for a new way of life and a new approach to fighting wars. From the perspective of a national strategy, the scandal about Snowden and the National Security Agency＇s PRISM has shown that all network information, communication information, and individuals＇ Internet behavior are under surveillance in the global world by those countries domi- nant in information technology （IT）. In 2011, the USA released the ＂International Strategy for Cyberspace＂ [1], which embodies a new trend in global cyber security, with the US cyber security strategy changing from defense to offense. Corresponding to this trend, in recent years the army network warfare battalion of the USA has launched massive hacking attacks and exploitations against our national network infrastructure.     

前言

微电子和光电子器件是现代信息技术的硬件基础．半导体硅(Si)是当前制备微电子器件最重要的材料，但由于其间接带隙的能带结构和弱的电光效应，限制了在光电子器件方面的应用．几十年来，人们一直在探索能在单块Si片上集成微电子器件和光电子器件的途径，如果这一技术被突破，无疑将对未来的通讯、显示、计算机等信息技术产生深远的影响．     

Preface

<正>It has been 10 years since the journal-“Progress in Natural Science:Materials International”(PNSMI)-co-sponsored by Chinese Materials Research Society(C-MRS) and International Union of Materials Research Societies(IUMRS), was renamed in 2010. Materials science, one of the traditional science disciplines in China,     

Preface

正It is well known that the increases in atmospheric CO2and CH4(long-lived greenhouse gases;GHGs)owing to anthropogenic activity are the dominant processes driving global climate change.Space-based measurements of GHGs with high precision,resolution,and global coverage are urgently needed to characterize the geographic distribution of their sources and sinks,and to quantify their roles in the atmospheric CO2budget.Over the past 10 years,the European Space Agency(ESA),the National Aeronautics     

Preface

In the past decades, the ability of observing and manipulating quantum phenomena has been tremendously improved. It has advanced the thriving of quantum technologies with atomic, optical and solid-state systems.     

Preface

In the last two decades, carbon nanotubes (CNTs) have attracted tremendous attention. A CNT can be considered a seamless cylinder formed by rolling up graphene sheets, which are composed of hexagonal sp2 carbon networks. A single-walled CNT