欢迎订阅 欢迎投稿《分析检测(英文)》

国内统一刊号:CN10-1412/O6 ISSN 2096-241X e-ISSN 2509-4696《分析检测(英文)》(Journal of Analysis and Testing)是我国分析化学领域第一本英文科技期刊,填补国内空白。季刊,大16开,72页,国内外公开发行。期刊于2017年创刊,已被科睿唯安(Clarivate Analytics)公司旗下Web of Science数据库ESCI(Emerging Sources Citation Index)、Scopus数据库、美国工程索引(EI Compendex,简称EI)数据库等重要数据库收录。期刊的学术质量和发展潜力获得了国际出版界和学术界的认可,已具有一定的国际影响力。     

SnO2表面卤化提高钙钛矿太阳能电池光伏性能

钙钛矿太阳能电池(PSCs)成为近几年来迅速发展的新型太阳能电池,其中将SnO₂纳米粒子层用作电子传输层(ETL)的钙钛矿太阳能电池器件得到了广泛的关注。SnO₂有着更低的制备温度,使其具备应用于柔性器件的潜力,但与钙钛矿层能级不匹配等问题限制着其发展。而在界面处加入钝化层,尤其是表面卤化的方法或可解决这一问题。本文综合研究了SnO₂表面卤化对钙钛矿太阳能电池光伏性能的影响,选用四丁基氯化铵(TBAC)、四丁基溴化铵(TBAB)和四丁基碘化铵(TBAI)三种钝化材料对SnO₂表面进行钝化处理,并对钝化材料溶液进行了浓度梯度研究。通过材料形貌、结构和光学性能表征以及电池器件性能测试分析等方法,证明了SnO₂表面卤化可提高钙钛矿层的质量和PSCs光伏性能,并从器件内部电荷传输动力学等角度解释了器件性能改善的原因。为进一步说明其性能改善的机理,采用基于密度泛函理论(DFT)的第一性原理计算方法对材料表面性质进行了深入研究,从能量、结构、电荷密度、态密度、功函数等角度解释了表面卤化提高SnO₂/钙钛矿界面处电子传输特性的原因。实验和理论计算均表明TBAC对于SnO₂具有较好的钝化效果,并随着溶液浓度的提升钝化作用越明显。SnO₂表面卤化作用的深入研究不仅对提高电池器件性能具有实际意义,还能够帮助理解太阳能电池界面现象,为界面改性提供新的研究思路。     

煤矿顶板离层回归分析与稳定性评价

以光纤Bragg光栅位移传感器对淮北朱仙庄煤矿顶板离层监测为实际数据依据,选择最佳的典型函数模型对顶板离层进行非线性回归分析,得出能够反映位移发展趋势的回归曲线。监测结果与回归拟合数据表明:非线性回归分析预测方法不仅可以反映煤矿顶板离层实时变化过程,还能根据其变化趋势进行巷道稳定性判断。     

新疆理化所提出一种基于模拟的使非线性光学晶体材料相匹配区间蓝移的方案

非线性光学晶体是通过频率转换拓宽固态激光器输出波段的关键材料。随着激光微加工,激光通讯和现代科学仪器的持续发展,对紫外/深紫外非线性光学晶体的需求日益增加。但是,很多拥有宽的紫外透过范围和大的倍频效应的晶体因其双折射无法满足深紫外相匹配而无法输出深紫外激光。     

成都中科普瑞净化设备有限公司

正中国科学院高新产业|中国科学院领先技术ISO9001质量管理体系认证ISO14001环境管理体系认证国家高新技术企业(GR200851000218)国家863计划、支撑计划支持企业成都中科普瑞净化设备有限公司是中国科学院全额控股的国家高新技术企业。公司以中国科学院技术力量为依托,自1969年以来,一直专业从事气体纯化技术与设备制造、气体处理工程以及微型反应装置等方面的研究和产     

Biodegradable thermogel as culture matrix of bone marrow mesenchymal stem cells for potential cartilage tissue engineering

Poly（lactide-co-glycolide）-poly（ethylene glycol）-poly（lactide-co-glycolide）（PLGA-PEG-PLGA） triblock copolymer was synthesized through the ring-opening polymerization of LA and GA with PEG as macroinitiator and stannous octoate as catalyst. The amphiphilic copolymer self-assembled into micelles in aqueous solutions, and formed hydrogels as the increase of temperature at relatively high concentrations（〉 15 wt%）. The favorable degradability of the hydrogel was confirmed by in vitro and in vivo degradation experiments. The good cellular and tissular compatibilities of the thermogel were demonstrated. The excellent adhesion and proliferation of bone marrow mesenchymal stem cells endowed PLGA-PEGPLGA thermogelling hydrogel with fascinating prospect for cartilage tissue engineering.     

烷基链工程对两亲有机半导体热力学性能影响的研究

Due to their special polar structure, amphiphilic molecules are simple to process, low in cost and excellent in material properties. Thus, they can be widely applied in the preparation of functional film materials and bionics related to cell membranes. Therefore, amphiphilic organic semiconductor materials are receiving increasing attention in research and industrial fields. The structure of organic amphiphilic semiconductor molecules usually consists of three functional parts: a hydrophilic group, a hydrophobic group, and a linking group between them. The adjustment of their correlation to achieve the target performance is particularly important and needs experimental discussion regarding synthetic methodologies. In this work, we focused on the engineering of a substituent alkyl-chain, and an amphiphilic functional molecule (benzo[b]benzo[4, 5] thieno[2, 3-d]thiophene, named C_nPA-BTBT, n = 3–11) was proposed and synthesized. This molecule links the hydrophobic semiconductor backbone and hydrophilic polar group through alkyl chains of different lengths. Fundamental properties were investigated by nuclear magnetic resonance (NMR) and ultraviolet-visible spectroscopy (UV-Vis) to conform the structure and the band gap properties of the designed organic semiconductor. Thermodynamic features were investigated by thermogravimetric analysis (TGA) and corresponding differential thermal gravity (DTG), which indicate that the functional molecule C_nPA-BTBT (n = 3–11) has a great stability in ambient conditions. Moreover, the results show that the binding ability of the amphiphilic molecule to water molecules was regulated by the odd-even alternating effect of the alkyl chain and the intramolecular coupling with BTBT. Furthermore, differential scanning calorimetry (DSC) and polarized optical microscopy (POM) were used to study the material properties in detail. As the length of the alkyl chain increased, the functional molecule C_nPA-BTBT (n = 3–11) gradually changed from "hard" species with no thermodynamic changes to a transition one with a pair of thermodynamic peaks, and eventually to a "soft" one as a typical liquid crystal with clear observation of Maltese-cross spherulites. The cooling and freezing points were further studied, and the values and trends of their enthalpy and corresponding temperature fluctuated and alternated due to the volume effect, odd-even alternating effect, flexibility, and other functions of the alkyl chain. Three molecular models were proposed according to the thermodynamic study results, namely the brick-like model, transition model, and liquid crystal model. This work presents in-depth discussion on material structure and corresponding thermodynamic properties, and it is an experimental basis for the design, synthesis, optimization, and screening of target performance materials.     

固液界面的力?电?化学耦合及在电催化体系中的应用

目前许多新型高效金属催化剂在设计制备中都考虑到表面力学因素, 例如层状结构、核壳结构等, 其表面高活性原子受到不同程度的应变作用. 应变可直接改变金属的能带带隙, 对催化剂表面的电化学反应产生显著影响, 是一种有效提升材料催化活性的新思路和制备高性能催化剂的新途径, 因此受到了科研工作者的广泛关注. 传统的材料应变工程手段存在着活性物质层的应变值难以精确定量, 并缺少实时调控以及制备工艺繁琐等难题, 导致应变与电催化活性相关性规律识别方面的理论和实验研究进展缓慢. 相比于传统的材料手段, 交变载荷产生的应变具有幅值和频率的可变性以及连续的调控性, 在实验中可以完全排除噪声、缺陷、空位、基底效应等其他外部或材料本征的影响因素. 该综述从经典固液界面热力学表述出发, 简要介绍了电催化体系中的力?电?化学耦合效应, 归纳总结目前电催化体系中应变施加的实验手段和分析方法, 并基于目前相关研究着重讨论在交变载荷作用下应变对金属表面电催化反应的作用机理, 最后从力学角度展望了表面力学在电催化体系中的研究重点及发展趋势.      

高频脉管制冷机的研究进展(下)

介绍了斯特林脉管制冷机(高频脉管制冷机)国内外最新研究现状以及发展趋势。分析了由于高频脉管制冷机的效率可以达到甚至超过斯特林制冷机,从而在空间领域、红外传感器件和高温超导器件的冷却领域获得广泛应用。指出了线性压缩机是高频脉管制冷机的重要部件之一,提高线性压缩机的性能及机械寿命是提高高频脉管制冷机性能和寿命的一条重要途径。     

沙丘背风侧不同铁路结构形式对风沙环境的适应性分析

当铁路穿越大风沙漠地区时,风沙灾害会对铁路工程及其正常运营产生严重威胁,而设计一种合理的铁路结构形式能够减小风沙沉积对铁路工程的危害.在本文中,以敦煌至格尔木铁路沙山沟段落为研究对象,采用多相流的方法对越过沙丘的风沙运动过程进行数值模拟,分别讨论了风沙运动对位于沙丘背风坡的铁路路基工程和桥梁工程的影响.主要的模拟结果显示:路基工程明显降低了风速并且将沙丘后的回流区分成了两部分,而桥梁工程的导流效应则压缩了沙丘背风坡的回流区;轨道间的道碴增大了铁路表面的粗糙度,在轨道间有少量沙粒沉积,而路基工程两侧则有大量积沙;铁路表面的积沙量与摩阻风速呈现出非线性关系,随着摩阻风速的增大,路基工程沙粒沉积的增加速度大于风蚀能力的增加速度,而桥梁工程则正好相反.在防止风沙危害铁路方面,设置桥梁工程明显优于路基工程.本研究为风沙运动对铁路工程的影响提供了理论支持,也为今后的铁路工程设计提供了新的思路与研究工具.