共查询到20条相似文献,搜索用时 15 毫秒
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柔性电子作为新兴的研究热点, 涉及材料、 化学、 物理等多个基础学科的交叉, 以及在生物医用、 可穿戴设备及人工智能等多个领域的应用. 柔性电子设备的制造加工过程中会用到弹性基底、 导电层、 功能层等多种性质各异的材料, 其互相之间的整合受到它们表面性质和界面结合力的限制; 器件的功能、 可靠性、 对环境的敏感性等也受到了器件表界面性质的影响; 因此, 对材料和器件表界面的处理在柔性电子学中具有重要作用. 本文对柔性电子学中常用的表界面化学过程分为3大类进行介绍: 表面电化学过程, 基于特定化合物反应产生的电流制备电化学传感器, 利用电流/电压控制表面负载化合物; 表面修饰, 通过表面改性提高材料的加工性能, 共价修饰分子层或其它材料赋予器件特殊功能性质或保护层; 不同材料之间的界面连接, 通过共价连接或化学反应辅助的物理交联实现不同材料的结合, 提高柔性器件的稳定性, 实现柔性设备的整合. 对各应用进行总结和举例后, 讨论了存在的问题, 并对未来的发展方向及前景进行了展望. 相似文献
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Vaclav Nemec 《Journal of Structural Chemistry》1993,34(6):895-895
II Siberian Seminar on Molecular Electronics 相似文献
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A number of methodologies for immobilizing metal nanoparticles in 2‐dimensional aggregate structures on various substrates, some with concomitant tuning of the surface plasmon resonance (SPR), have been reported. Many of them involve special functionalization of the nanoparticles, multiple fabrication steps or lengthy procedures. The present study demonstrates that monolayer Langmuir–Blodgett (LB) film of a hemicyanine‐based amphiphile with cationic headgroup is an easily fabricated platform for harnessing citrate‐stabilized gold nanoparticles. It is shown that a single immersion step can be used to immobilize the nanoparticles uniformly on large area films and that systematic variation of the immersion time from 10 min to 6 h leads to controlled assembly of the particles and tuning of the SPR band over ~100 nm. A model for the structural reorganization in the LB film that facilitates the assembly of nanoparticles is presented and the advantages of the current methodology over earlier protocols are pointed out. The versatility of LB films in terms of the molecular level control of fabrication it enables and the variety of film structures that can be realized, point to the wide scope for future explorations, expanding upon the present observations. 相似文献
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冠醚作为第一代大环主体分子,具有柔性的空腔,因其对金属离子、有机阳离子的络合作用而被广泛用于构筑超分子组装体。磺化冠醚是一种水溶性良好的阴离子型冠醚衍生物,相比于冠醚,它具有更多的键合位点,对金属离子、有机阳离子具有更强的键合和良好的选择性。本文从磺化冠醚的合成,对碱金属离子、镧系金属的络合,对有机阳离子客体的组装等方面介绍了磺化冠醚的研究进展。然后从热力学、晶体结构学的角度综合分析了磺化冠醚键合与组装的模式及驱动力。最后讨论了磺化冠醚的分子键合与组装发展所面临的挑战,并对其应用前景进行了展望。 相似文献
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What is the most favorite and original chemistry developed in your research group?The most favorite and original chemistry developed in my research group is about the reconstitution of motor proteins in artificially designed and assembled units.It is based on the molecular assembly technique,but the method is different from the conventional approach. 相似文献
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Reinhard Wolf Masumi Asakawa Peter R. Ashton Marcos Gmez-Lpez Christoph Hamers Stephan Menzer Ian W. Parsons Neil Spencer J. Fraser Stoddart Malcolm S. Tolley David J. Williams 《Angewandte Chemie (International ed. in English)》1998,37(7):975-979
A color change from purple to green takes place on addition of tetrathiafulvalene (TTF) to the macrobicyclic receptor 1 4+, which is composed of a cyclobis(paraquat-p-phenylene) tetracation that shares one of its paraphenylene rings with a 1,5-naphthoparaphenylene-[36]crown-10 macrocycle. The TTF molecule forces the macrobicycle to turn inside out (see schematic drawing below) and displaces the self-complexed 1,5-dioxynaphthalene ring system from the center of the tetracationic cyclophane. 相似文献
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Yang-Jin Cho So-Yoen Kim Jie-Won Lee Prof. Won-Sik Han Prof. Chul Hoon Kim Prof. Ho-Jin Son Prof. Sang Ook Kang 《Chemistry (Weinheim an der Bergstrasse, Germany)》2019,25(34):8149-8156
A new type of solid-state photochromism was observed in an AB2-type molecular assembly comprising a central silole and two peripheral o-carborane units, and in this assembly, depending on the assembling positions of those units at the adjoining benzene ring, two different regioisomers were formed: Si-m-Cb and Si-p-Cb . Each isomer showed different solid-state photochromism depending on its solid-state molecular conformation and was either in the crystalline or amorphous state. The crystals of each meta- or para-isomer, CSi-m-Cb or CSi-p-Cb, showed yellow or blue emission, and mechanically grinding those crystals into amorphous powders of ASi-m-Cb and ASi-p-Cb, switched their emissions to blue and yellow, respectively. Photophysical studies revealed that the electronic interaction between silole and o-carborane units determined the emission color. The crystal and DFT-optimized structures each account for the crystalline and amorphous structures, respectively, and are correlated well with the electronic interactions in the molecular assembly in the solid state, thus enabling the prediction of the solid-state molecular conformational change. 相似文献
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Qianqian Fan Zirui Liu Feng Qiu Prof. Yong Mao Prof. Qingju Liu Prof. Longzhou Zhang 《Chemistry (Weinheim an der Bergstrasse, Germany)》2022,28(63):e202202700
The artificially accurate design of nonmetal electrocatalysts’ active site has been a huge challenge because no pure active species with the specific structure could be strictly controlled by traditional synthetic methods. Species with a multiconfiguration in the catalyst hinder identification of the active site and the subsequent comprehension of the reaction mechanism. We have developed a novel electro-assisted molecular assembly strategy to obtain a pure pentagon ring on perfect graphene avoiding other reconstructed structures. More importantly, the active atom was confirmed by the subtle passivation process as the topmost carbon atom. Recognition of the carbon-defect electrocatalysis reaction mechanism was first downsized to the single-atom scale from the experimental perspective. It is expected that this innovative electro-assisted molecular assembly strategy could be extensively applied in the active structure-controlled synthesis of nonmetal electrocatalysts and verification of the exact active atom. 相似文献
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The reversibility of boronic acid and diol interaction makes it an ideal candidate for the design of self‐assembled molecular structures. Reversibility is required to ensure that the thermodynamically most stable structure is formed. Reversibility also ensures that any errors produced during the assembly process are not permanent. 相似文献
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In this paper, according to the molecular fragment principle, a series of eight ternary luminescent lanthanide complex systems were assembled, and whose compositions were determined with elemental analysis and infrared spectrum: Ln(MA)3(L)·H2O, where Ln = Sm, Eu, Tb, Dy; HMA = α‐methylacrylic acid; L = 1,10‐phenanthroline (phen), 2,2′‐bipyridine (bipy). The photophysical properties of these functional molecular systems were studied with ultraviolet‐visible absorption spectrum, and fluorescence excitation and emission spectrum. It was found that the heterocylic compounds (phen and bipy) act as the main energy donor and luminescence sensitizer for their suitable energy match and effective energy transfer to the emission energy level of Ln3+ ions. MMA ligand was only used as the terminal structural ligand to influence the luminescence. Especially terbium complex systems show the strongest luminescence for the optimum energy match and transfer between phen (bipy) and Tb3+ ion. 相似文献
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Zhuoyao Li Guilin Wang Chengyu Zhang Cong Wei Xiang Wang Prof. Yongqian Gao Prof. Hai Li Prof. Xiao Huang Dr. Haifeng Yuan Prof. Gang Lu 《Chemistry (Weinheim an der Bergstrasse, Germany)》2019,25(45):10561-10565
Developing simple and cost-efficient methods for fabricating molecular patterns is of great importance in the field of nanoscience and nanotechnology. Here, a simple and convenient method was developed for fabricating nanopatterns composed of positively charged silane molecules by using silver nanowires as templates. The as-obtained silane pattern copies the shape of the silver nanowires and is only 0.7 nm thick, which can later be used for templated assembly of small molecules and nanoparticles of opposite charges. As a proof of concept, the resultant assembly could be further used for surface-enhanced Raman scattering. 相似文献
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Supramolecular Assembly through Interactions between Molecular Dipoles and Alkali Metal Ions 下载免费PDF全文
Dr. Tomoko K. Shimizu Dr. Jaehoon Jung Dr. Hiroshi Imada Dr. Yousoo Kim 《Angewandte Chemie (International ed. in English)》2014,53(50):13729-13733
Establishing a way to fabricate well‐ordered molecular structures is a necessary step toward advancement in organic optoelectronic devices. Here, we propose to use interactions between electric dipoles of molecules and alkali metal ions to form a well‐developed homogeneous monolayer of diarylethene molecules on the Cu(111) surface with the aid of NaCl co‐deposition. Scanning tunneling microscopy and density functional theory calculation results indicate that the formation of a row‐type structure occurs as a result of interactions between the Na+ ions and the diarylethene molecular dipoles, drastically changing the adsorption configuration from that without Na+. 相似文献