化学修饰阳极氧化铝模板法合成小尺寸聚苯胺纳米线

利用表面活性剂对阳极氧化铝(AAO)模板进行化学修饰,发展了模板合成法,从而得到更小尺寸的聚苯胺纳米管、线.在表面活性剂十八烷基脂肪酸(R18)修饰下,在14nm孔径的AAO模板中合成7nm的纳米线.对不同表面活性剂的比较后发现,通过改变修饰表面活性剂上烷基链长可以对所制备的聚合物纳米管、线的直径进行调控

熔锥光纤倏逝场作用石墨烯双波长锁模掺镱光纤激光器

报道了利用熔锥光纤石墨烯饱和吸收体实现1μm波段的双波长锁模掺镱光纤激光器(YDFL)。利用光学诱导沉积法,将水溶液中的石墨烯纳米复合物在光倏逝场的作用下沉积至熔锥光纤的锥腰部位。该石墨烯熔锥光纤器件作为可饱和吸收锁模部件具有制作灵活、全光纤结构以及高损伤阈值等优点。基于该器件的可饱和吸收及腔内双折射滤波特性,通过调节偏振控制器优化激光腔内偏振特性,实现了稳定的YDFL双波长锁模。该激光器的两个锁模波长分别为1034.77nm和1038.85nm,二次谐波锁模重复频率为1.09MHz,腔内单脉冲能量最大可达35nJ

聚苯胺对纳米CdS的光致发光增强效应

利用电化学脉冲沉积法在聚苯胺 ( PANI)膜上制备了纳米 Cd S/PANI复合膜 ,并利用扫描电镜光谱、紫外可见光谱、红外光谱、拉曼和荧光等光谱技术表征复合膜的形貌、结构及性质 .Cd S/PANI复合膜中Cd S微粒呈现量子尺寸效应 ;Cd S和 PANI间存在相互作用 ;由于聚苯胺和 Cd S能级的合适匹配 ,聚苯胺对Cd S的光致发光 ( PL)有增强效应 ,增强机理为光生载流子的传递机

耐热高活性改进铜基甲醇合成催化剂

耐热高活性改进铜基甲醇合成催化剂Ｈｅａｔ－ｒｅｓｉｓｔａｎｔａｎｄＨｉｇｈｌｙＡｃｔｉｖｅＭｏｄｉｆｉｅｄＣｏｐｐｅｒ－ｂａｓｅｄＣａｔａｌｙｓｔｓｆｏｒＭｅｔｈａｎｏｌＳｙｎｔｈｅｓｉｓ杨意泉，张鸿斌，郭忠平，陈汉忠（厦门大学化学化工学院）周文成，..

Evaluation of Self-Field Distributions for Bi2223 Tapes With Oxide Barriers Carrying DC Transport Current

For AC loss reduction in Bi2223 tapes subjected toan AC external magnetic field, twisting the superconductingfilaments and/or introducing oxide layers as highly resistivebarriers around each filament are required. However, thestructure of barrier tape becomes very complex and longitudinaluniformity of both transport property and tape structure could beeasily deteriorated. To improve the current transport capabilityand its longitudinal uniformity for barrier tape for AC use, simpleand non-destructive techniques to characterize them should beindispensable. In this paper, we examined the self-fielddistributions for Bi2223 tapes with oxide barriers carrying DCtransport current by a scanning Hall-probe microscopy (SHM).Non-twisted and twisted 19-filamentary tapes with SrZrO3 +Bi2212 barriers were prepared by powder-in-tube process. Thedistributions of self-field in perpendicular to the broader face of atape carrying DC current below critical current Ic was measuredat 77 K by SHM with an active area of 50 μm × 50 μm, at 0.5 mmaway from the tape surface. Based on the measured self-fielddistributions, longitudinal non-uniformity of transport propertiesand the presence of local defects to obstruct the current transportin barrier tapes were investigated

聚苯胺纳米管在阳极氧化铝模板中电聚合的生长机理

利用阶跃电位、循环伏安等电化学方法,应用金属电沉积理论,研究聚苯胺纳米管在阳极氧化铝模板(AAO)内电聚合的生长机理.结果表明:电聚合初始,苯胺二维非扩散控制的瞬时成核生长形成聚苯胺晶胞链段单层,单层形成以后,聚苯胺的生长过程变为线性扩散控制.XRD实验进一步证实电聚合的聚苯胺同时包含结晶相和无定型相结构

中年期における文化的自己観とソーシャル・サポート要請の関係についてー感情に着目してー

Previous research has suggested that especially middle-aged Japanese people are less likely to seek social support compared to Americans. Japanese emphasize a construal of self that is interdependent with others. By contrast, Americans have a strong belief in the independence of the self. Such cultural construal of the self shapes the nature of psychological processes, such as emotions. It has also been suggested that people who receive help feel more indebted, because they are obligated to reciprocate the favors that are received. We hypothesized that engaged negative emotions that are involved in the interdependent self construal, would induce indebtedness, and restrain people from social support seeking. A questionnaire survey was conducted with middle-aged people in Japan (N = 385: Mean age, 48 years, SD = 5.39). Results confirmed that social support seeking was affected by the cultural self construal through negative emotions: (1) The more interdependent a person\u27s self construal was, the more engaged were negative emotions. (2) The more engaged a person\u27s negative emotions were, higher was indebtedness after receiving help on issues related to children. (3) The more indebted a person was, less was the tendency to seek social support for issues related to children