Combined Optical,Gravimetric, and Electrical Operando Investigation of Structural Variations in Polymeric Mixed Conductors

Bioelectronics based on organic mixed conductors offers tremendous application potential in biological interfacing, drug delivery systems, and neuromorphic devices. The ion injection and water swelling upon electrochemical switching can significantly change the molecular packing of polymeric mixed conductors and thus influence the device performance. Herein, we quantify ion and water injection, and analyze the change of microscopic molecular packing of typical polymeric mixed conducting materials, namely poly(3,4‑ethylenedioxythiophene) doped with poly(styrene sulfonate) (PEDOT:PSS) and poly(2-(3,3′-bis(2-(2-(2-methoxyethoxy)ethoxy) ethoxy)-[2,2′-bithiophen]-5-yl)thieno[3,2-b]thiophene) (p(g2T-TT)), by integrating electrochemical quartz crystal microbalance with dissipation monitoring, in situ charge accumulation spectroscopy, and electrical current-voltage measurement. The penetration of ions and water can lead to viscous and disordered microstructures in organic mixed conductors and the water uptake property plays a more dominant role in morphological disruption compared with ion uptake is demonstrated. This study demonstrates the potential application of the combined optical, gravimetric, and electrical operando platform in evaluating the structural kinetics of organic mixed conductors and highlights the importance of concertedly tuning the hydration process, structural integrity, and charge transport properties of organic mixed conductors in order to achieve high performance and stable bioelectronic devices.     

飞秒激光脉冲在大气中的色散及补偿

卫星飞秒激光测距理论上可达到亚微米量级的测距精度,但飞秒激光脉冲在大气中传输时由色散导致的脉冲展宽显著,会使测距精度下降。为补偿飞秒激光脉冲在大气中的色散需对其色散量进行定量计算。推导了飞秒激光脉冲在大气中的群速度色散和脉冲展宽公式,表明脉冲展宽程度和群速度色散及传输距离有关;中心波长相同的飞秒激光脉冲脉宽越窄色散越严重,而当脉宽相同时,中心波长越短色散越严重。计算比较了大气和BK7玻璃的群延时、群速度色散和三阶色散。卫星激光测距系统应采用中心波长较长的1 550 nm的飞秒激光脉冲,脉宽应适当选取。由于飞秒激光色散严重,提出了采用单模光纤序列进行粗补偿和采用光栅对进行精密补偿的两种补偿相结合的方式对其色散进行补偿。     

250W带功率因数校正整流电源模块的研制

功率因数校正技术越来越成为电源行业研究的热点。文中介绍了适用于雷达等设备的250W带功率因数校正整流电源模块的设计，分析了其中升压电感器设计、主开关管保护、控制电路消振、散热设计和表面贴装等关键技术，完成了实验研究，获得了满意的试验结果。     

Genetic types and source of the Upper Paleozoic crude oil in the Shiguhao area in northern Ordos Basin,central China

The physical properties, group compositions, carbon isotopes and biomarkers of the Upper Paleozoic crude oil in the Shiguhao area in northern Ordos Basin were investigated to study geochemical characteristics and source of the crude oil. The Upper Paleozoic crude oil in the Shiguhao area belongs to the medium oil with high viscosity, high wax content, low sulfur content and low freezing point, and it displays the group composition of high saturated hydrocarbons/aromatics. The carbon isotopic compositions and biomarkers of crude oil indicated that the Upper Paleozoic crude oil was coal-derived oil and at the mature stage. The physical properties, carbon isotopes and GC-MS parameters of saturated hydrocarbons indicated that, the crude oil displayed a good affinity with the Upper Paleozoic coal rocks in the Shanxi Formation. Therefore, the Upper Paleozoic coal rocks in the Shanxi Formation were the important source of the Upper Paleozoic crude oil, and this provided valuable direction for the petroleum exploration in northern Ordos Basin.     

塔中地区深层寒武系盐下白云岩储层特征及主控因素

塔中地区东部深层寒武系盐下白云岩勘探取得重大发现,但针对该层系白云岩储层的研究尚属空白。利用钻井、岩心、薄片、扫描电镜、测井及三维地震资料,对塔中寒武系盐下白云岩产层的储层类型、特征、主控因素及展布规律开展探索性研究,认为塔中寒武系盐下白云岩主要发育颗粒滩相白云岩储层和潮坪相膏云岩储层。颗粒滩相白云岩储层主要发育在下寒武统肖尔布拉克组以及中寒武统沙依里克组上段,岩性以台内藻砂屑滩相颗粒白云岩、藻白云岩及粉细晶白云岩为主,明显受岩相控制,形成于准同生期,并受后期层间岩溶作用改造优化。潮坪相膏云岩储层主要发育在中寒武统阿瓦塔格组及沙依里克组下段,岩性以含膏云岩、泥粉晶云岩、膏云质角砾岩为主,明显受岩相及裂缝控制,形成于准同生期,并受后期有机酸溶蚀作用形成微孔型储层。目前而言,下寒武统肖尔布拉克组台内藻砂屑滩相颗粒白云岩储层是最现实的勘探领域。     

液晶投影电视技术的研究

本文介绍了国外液晶投影电视的发展动态,结合对典型液晶彩色投影机特性的介绍,剖析了液晶投影电视机的结构和原理,并进一步探讨了研究液晶投影电视技术的有关技术要点,阐述了在我国进行这项技术研究的有关问题。     

亚稳态惰性原子与SOCl_2传能反应产物SO(A)的发射光谱和强度分析

本文在流动余辉装置上,利用亚稳态惰性气体原子[He(2~3S)、Ne(~3P_(0,2))、Ar(~3P_(0,2))]与SOCl_2的专能反应,在(230-430nm)波段观察到了产物的发射谱,光谱归属为自由基SO(A~3∏_(2,1,0)→X~3∑~-)的跃迁。对光谱强度分析表明:SO(A→X)的偶极跃迁矩Re随核间距明显地变化。通过拟合,找出了这一变化的关系。另外,本文还计算了SO(A~3∏_0→X~3∑~-)跃迁的Franck-Condon因子。     

TDA4501—TDA3565亮度通道CAD优化设计

本文概要介绍如何通过CAA及CAD提高图像分辨率。     

13nm投影光刻用激光等离子体软X射线源

软X射线投影光刻能够制作出特征线宽小于0．1μm的线条。激光等离子作源的研究是软X射线投影光刻中几项关键技术之一。本文报道了13nm投影光刻用激光等离子体软X射线源。对Sn（Z＝50）靶的激光打靶条件进行初步优化，测定了其在10～20nm波段范围内的辐射相对强度分布。     

Fe膜硫化法制备FeS_2薄膜

由于ＦｅＳ２具有窄的禁带宽度（Ｅｇ＝０．９５ｅＶ）和高的吸收系数（α＞６×１０５ｃｍ－１），使它成为一种很有发展前途的太阳能材料。本文主要介绍了用射频溅射制备铁膜，然后在真空中（１０－１Ｐａ），通过控制时间和温度进行硫化。经ＸＲＤ和ＡＥＳ对薄膜进行分析，表明试样在硫化温度Ｔ＝４００℃，时间ｔ＝４８ｈ的条件下，Ｆｅ膜转变为ＦｅＳ２膜