Se及Cu2Se纳米线的大面积合成及其纳米电子学器件性能

通过液相化学反应制备了高质硒(Se)纳米线,同时以Se纳米线为模板,合成了CuzSe纳米线.利用透射电镜(TEM)、高分辨透射电镜(HRTEM)以及X射线衍射仪(XRD)研究了纳米线的形貌结构特征.结果显示,Se纳米线为单晶结构,生长方向沿其[001]面.结合先进的光刻技术及磁控溅射,成功制备了Se和Cu2Se纳米电子学器件.初步测试表明,这种Se纳米线为P型半导体,而Cu2Se纳米线则表现出明显的相变行为.这些发现有利于开发纳米线场效应晶体管以及相变存储器件方面的应用.     

大规模制备Ni纳米线阵列及其磁学特性研究

在多孔氧化铝模板的纳米孔洞中,利用直流电化学沉积的方法成功地制备了高度有序的磁性金属Ni纳米线阵列.利用扫描电子显微镜(SEM)、透射电子显微镜(TEM)、X射线衍射仪(XRD)和物理性质测量系统(PPMS)对样品的形貌、晶体结构和磁学性能进行了表征测试.SEM和TEM观察结果显示,Ni纳米线均匀地生长在氧化铝模板的孔洞中,直径约为300nm,其表面非常光滑.XRD结果显示,生长的Ni纳米线为fcc结构.磁测量结果表明,与体材料相比,Ni纳米线展现出增强的矫顽力和剩磁比,并且表现出较强的磁各向异性,其居里温度约为627K,与块体Ni的居里温度相当,说明在较高温度下,纳米线仍可呈现铁磁特性.     

SOI基上制备CuO纳米线

在SOI基上制备光电纳米器件具有良好的光电集成应用前景,通过铜膜生长法在SOI基上制备了形貌为类针状的Cu(OH)2前驱体纳米线,并采用热处理法600℃条件下成功制备了CuO纳米线。通过扫描电镜(SEM)、透射电镜(TEM)、X射线衍射测试(XRD)对样品结构、形貌进行了表征。SEM、TEM测试结果表明,Cu(OH)2前驱体纳米线结构一致,尺寸均匀,表面光滑。在Cu(OH)2前驱体纳米线上二次生长的CuO纳米线具有类蒲草状细长光滑的结构,CuO纳米线直径约为80~100nm,长度约为10μm,CuO纳米线结晶性良好。     

交流电化学沉积铜纳米线阵列及其机理探讨

利用二次阳极氧化的方法制备孔高度有序的阳极氧化铝(AAO)为模板,采用交流电化学沉积方法,在AAO模板孔道内制备Cu纳米线。采用扫描电子显微镜(SEM)、透射电子显微镜(TEM)和X射线衍射仪(XRD)对Cu纳米线的形貌、晶体结构进行研究。结果表明:模板的孔径均匀,孔道平直。Cu纳米线均匀分布在AAO模板纳米孔隙中,直径均一,并沿Cu(Ⅲ)晶面择优生长;AAO模板孔道生长铜纳米线不光滑,成凹凸状,并对此沉积机理进行探讨。     

复合锌镍纳米线结构和磁性研究

采用直流电化学沉积方法,在多孔阳极氧化铝模板纳米孔洞中制备出直径约90nm,长度超过10μm的金属Ni/Zn纳米线有序阵列.通过扫描电子显微镜(SEM),透射电子显微镜(TEM),原子力显微镜(AFM),X射线衍射仪(XRD),振动样品磁强计(VSM)对模板及所制备的样品进行形貌、结构及相关性能的表征和测试.结果表明所制备的Ni/Zn纳米线具有沿[111]方向择优生长特性,易磁化方向沿纳米线长轴方向.     

Cu0.4In（0.4）Zn1.2S2纳米线的催化生长

采用液相法制备了Cu0.4In0.4Zn1.2S2固溶半导体纳米线。对纳米线生长过程的分析表明,纳米线生长遵循溶液-固态-固相机理。前驱体首先受热分解形成Cu1.75S纳米晶,利用其结构中存在的Cu+空位溶解In3+和Zn2+,达到饱和后析出晶体形成Cu0.4In0.4Zn1.2S2固溶半导体纳米线。X射线衍射(XRD)、扫描电镜(SEM)、透射电镜(TEM)分析表明,纳米线呈曲折Z形,长度为5μm,具有纤锌矿结构。     

MWCNT/FeNi复合纳米线制备及其雷达微波和工频电磁波吸收性能

在多壁碳纳米线(MWCNT)上负载纳米FeNi粒子,同时实现2~18GHz和工频(50Hz)电磁波的高效吸收和衰减。首先采用化学镀方法制备MWCNT/Ni,然后采用多元醇的方法,制备MWCNT/FeNi复合纳米线。通过透射电子显微镜、X射线衍射和矢量网络分析等方法,对MWCNT/FeNi复合纳米线的微观结构进行分析。结果表明,MWCNT/FeNi复合纳米线具有有效的雷达微波吸收带(RL-10dB)范围为3.5~13.5GHz,能够衰减50Hz工频电磁波产生的76%电场感应以及58%磁场感应。     

高性能锂离子电池用Ni2Si纳米线阵列

采用化学气相沉积方法制备了镍硅合金(Ni2Si)纳米线阵列,研究分析了纳米线阵列的形貌随反应气氛的变化。该材料用作锂电池负极材料,显示出了优良的循环性能,有潜在的应用价值。     

光诱导液相沉积Ni/Cu应用于晶硅电池栅线的制备

采用光诱导液相沉积(LIP)的方法制备了Ni、Cu薄膜,并进一步讨论了沉积温度等相关因素对薄膜成分与形貌的影响。采用X射线衍射仪(XRD)和扫描电子显微镜(SEM)、四探针测试仪等分别对薄膜的成分、形貌、电阻率、非均匀性等进行表征。结果显示,制备的Cu膜电阻率为1.87×10-8Ω·m,非均匀性为2.64%。此外,将制备的Ni/Cu工艺应用于制备晶硅电池的栅线电极,用I-V测试仪测试电池参数,填充因子高达77.8%。     

化学气相沉积法制备GaN纳米线及其形貌结构和生长机理研究

采用化学气相沉积(CVD)法,分别以Ni、Au为催化剂,氨化金属Ga制备出GaN纳米线。运用SEM,EDX,TEM等表征手段分析了GaN纳米线的形貌与结构。通过改变氨化温度、生长时间、催化剂、衬底以及Ga源和衬底间的距离等生长条件,研究了其对GaN纳米线形貌和结构的影响,通过分析探讨纳米线的生长过程与机制,得到了生长GaN纳米线的最佳工艺。     

Certification Institutions Expected to Update and Transfer Information on Present Standards

Standards are the basis for production enterprises to organize production, ex-factory inspection, trade (delivery) and technical exchanges, product certification, quality arbitration and supervision.……     

Optimum-Simulation von Ernteprozessen

Zusammenfassung Bei der Gestaltung von Ernteprozessen — beispielsweise des Prozesses Mähdrusch, Körnertransport und -abnahme — als transportverbundene Fließarbeitsverfahren mit mindestens zwei verschiedenen Arbeitsmitteln gibt es einen großen Optimierungsspielraum. Solche Prozesse sind mehrstufige Bedienungsprozesse mit gemischter Anordnung der Bedienungseinrichtungen. Außerdem besitzen sie stark ausgeprägte räumliche Aspekte. Es wird vor allem gezeigt, welche Merkmale solcher Prozesse in Simulationsmodellen abgebildet sein müssen, welche Zielgrößen in Abhängigkeit von welchen Einflußgrößen unter Berücksichtigung welcher Prozeßbedingungen ermittelt werden sollten und wie der Bewertungsprozeß zur Ermittlung der gewünschten Informationen gestaltet werden muß.     

Brainstorming for ISO Strategy 2016-2020

正Responding to ISO’s appeal for survey for the to-be-developed ISO Strategy Plan for 2016-2020,SAC hosted a special workshop over the needs and comments of various fi elds on June 8 in Beijing.The workshop was attended by ISO President-elect and Ansteel General Manager Zhang Xiaogang,SAC Vice-Administrator Yu Xinli,and 30 experts from     

CNAS Passes APLAC's PTP Review

正The review group of Asia Pacific Laboratory Accreditation Cooperation(APLAC)carried out a 4-day peer review of the proficiency testing provider(PTP)for China National Accreditation Service for Conformity Assessment(CNAS)from July 28 to 31,2014.CNAS passed the PTP review with excellent performance.Two senior peer reviewers of APLAC made a comprehensive,rigorous and detailed review of CNAS’s PTP accreditation activities,and made the on-spot inspection of the review groups in Shanghai and Shenzhen respectively.     

新闻(英文)

正China and Greece Sign the Standardization Cooperation Agreement Witnessed by Chinese Premier Li Keqiang and Greek Prime Minister Antonis Samaras,AQSIQ Minister Zhi Shuping and ELOT Chairman and Executive Director Angelos Tolkas signed the SAC-ELOT Standardization Cooperation Agreement.The Agreement is one of the critical cooperation documents signed during Li Keqiang’s visit in Greece,encouraging China and Greece to     

Win-Win Cooperation

正The Chinese Premier Li Keqiang's recent trip to the UK has reinforced the China-UK comprehensive strategic partnership;just as the British Prime Minister David Cameron put it,"the relationship is gaining in strength,depth and understanding"after a bucket of business deals being inked worth more than 30 billion US dollars.From the first agreement signing in 2004 to the new agreement of mutual standards recognition and adoption in     

Systematic Approach for Emerging Industry

正A national directory of standards complexes for strategic emerging sectors was recently developed and released jointly by 12governmental departments,namely,SAC,NDRC,MOST,MIIT,MEP,MOA,AQSIQ,State Forest Administration,State Administration of Science and Technology for National Defense,State Oceanic Administration and National Railway Administration.     

Strictest Pollutants Emission Standards

正Four new national standards on air pollutant emission control offi cially issued by the Ministry of Environment Protection(MEP)together with AQSIQ and SAC has been brought into force from July 1,2014.The Emission standard for air pollutants of coal-burning,oil-burning and gasfi red boilers,which is the strictest emission standard historically,will tackle the stubborn pollution problem of boilers and waste incineration in most of China’s regions.     

Instructions to Authors

New Carbon Materials is a bimonthly journal published with the permission of the Ministry of Science and Technology and of the State News and Publication Agency.The journal is sponsored by the Institute of Coal Chemistry,Chinese Academy of Sciences,and is published by Science Press.Aims and Scope     

Progress on Standards Copyright Protection

正Recently,National Copyright Administration of China(NCAC)has rewarded 215 organizations and 179 individuals for their outstanding efforts on investigating standards copyright infringement and piracy in 2013.Hua Jianhua,the Deputy-Director of National Standards Copyright Protection Workgroup Office won a third prize of the national individual award.In 2012,SAC set up the national standards copyright protection working group,and developed policies to crack down standards infringement and piracy behaviors and to strengthen standards copyright protection.