Solid-state intramolecular motions in continuous fibers driven by ambient humidity for fluorescent sensors

One striking feature of molecular rotors is their ability to change conformation with detectable optical signals through molecular motion when stimulated. However, due to the strong intermolecular interactions, synthetic molecular rotors have often relied on fluid environments. Here, we take advantage of the solid-state intramolecular motion of aggregation-induced emission (AIE) molecular rotors and one-dimensional fibers, developing highly sensitive optical fiber sensors that respond to ambient humidity rapidly and reversibly with observable chromatic fluorescence change. Moisture environments induce the swelling of the polymer fibers, activating intramolecular motions of AIE molecules to result in red-shifted fluorescence and linear response to ambient humidity. In this case, polymer fiber provides a process-friendly architecture and a physically tunable medium for the embedded AIE molecules to manipulate their fluorescence response characteristics. Assembly of sensor fibers could be built into hierarchical structures, which are adaptive to diverse-configuration for spatial-temporal humidity mapping, and suitable for device integration to build light-emitting sensors as well as touchless positioning interfaces for intelligence systems.     

Van der Waals superlatticesOA

<正>Semiconductor technology has enabled many essential devices,including transistors for computing and communication,diodes for solid-state lighting and photovoltaics.Behind all these devices,the material foundation is a series of highly elaborated heterostructures and superlattices[1].To this end,integrating different materials into heterostructures or superlattices with well-defined spatial modulation of chemical compositions and electronic structures is central for generating designed e...     

Identification of twist-angle-dependent excitons in WS2/WSe2 heterobilayersOA

Stacking atomically thin films enables artificial construction of van der Waals heterostructures with exotic functionalities such as superconductivity, the quantum Hall effect, and engineered light-matter interactions.In particular, heterobilayers composed of monolayer transition metal dichalcogenides have attracted significant interest due to their controllable interlayer coupling and trapped valley excitons in moiré superlattices. However, the identification of twist-angle-modulated optical tr...     

指向关键能力培养的生物学作业设计与实践

关键能力是高考评价体系“四层”的考查重点,作业是能力培养的重要载体.本文对生物学作业进行模型化、流程化和进阶化的设计,目的是建构思维模型、领悟探究过程和训练逻辑思维,促进学生思维的发展,以落实关键能力的培养.     

论中国个人名称标目的区分问题

中国人的姓氏具有姓氏数量相对于总人口的比例严重短缺、各汉字姓氏在人口中的实际分布严重失衡、取名用字高度集中等特点。在中文编目规范控制过程中对中国个人名称标目进行区分尤为重要。中国个人名称标目的区分问题包括对古代个人名称和现代个人名称标目形式的问题;标目附加成分选取标准的控制原则、附加成分类型的划分和属性的分析等。将文献计量学的概念引入规范控制研究领域,会进一步丰富编目规则修订工作的信息来源,有助于拓展规范控制的研究领域。参考文献12。     

现代科技期刊的稿流

稿流是物流在知识创新和传播领域中的特殊形式,而现代稿流则是基于信息化网络平台,全面集纳稿件挖掘、编辑出版、发行推广等多目标的办刊思想、稿件处理体系及新型出版机制.针对科技期刊,阐述现代稿流所具备的开放性系统、个性化服务、标准化生产、信息共享等特点,以及稿源挖掘、文稿供应、稿件管理、审查与商修、整理加工、数字出版与推介、学习型组织平台等7大功能.现代稿流将办刊活动纳入整个社会科技传播的大范畴之中,将推动科技成果的生产与传播.     

共词分析法应用的规范化研究——主题词和关键词的聚类效果对比分析

主题词和关键词是共词聚类分析法中最常用的分析对象,但在相同的条件下,两者是否有相近的聚类效果？针对同一文献标本,采用同样的常规处理过程,对关键词和主题词的聚类效果进行对比统计分析,结果显示在高频词、类团成员及聚类质量上,存在较大差别。表明在共词聚类分析法的具体应用中,选择不同的对象时,不能简单套用相同的数据处理过程。最后,就共词聚类分析法的应用、处理规范等方面提出一些意见和建议。     

Internet英文搜索引擎评析

本文对Ｉｎｔｅｒｎｅｔ 上的英文搜索引擎作分析比较,目的在于探索各种类型的英文搜索引擎之间的检索理论、检索方法的异同,检索技术和易用性上的差别,以期达到帮助用户使用的目的和为今后的搜索引擎的发展提供意见和建议。     

免疫细胞分离鉴定综合实验设计

在传统免疫细胞分离检测实验教学的基础上,利用高性能正置荧光显微镜和流式细胞仪以不同技术检测鉴定免疫细胞,对实验教学内容和教学方法进行了改革和实践.将教学与临床科研相结合,利用大型贵重仪器以及合理安排实验时间开发综合实验.结果表明,学生不仅可以更有效消化医学免疫学课程基础知识,了解学科新技术的发展,而且可以培养学生的科研...     

现浇混凝土裂缝缺陷的成因及防治和处理

分析混凝土裂缝缺陷产生的原因,研究得出裂缝的防治办法。