检索结果-南通市图书馆

self-assembly of gold nanoparticles into nanoholes through annealing in the fabrication of square lattices of nanocylinders

在线全文

学校读者我要写书评

暂无评论

Chinese Optics Letters 2007年第11期5卷 657-659页

作者：张新平 Baoquan Sun Hongcang Guo 田金荣宋晏蓉王丽 College of Applied Sciences Beijing University of Technology Beijing 100022 Cavendish Laboratory University of Cambridge Cambridge CB30HE UK Fourth Physics Institute University of Stuttgart Stuttgart D-70569 Germany

We demonstrate the self-assembly of solution-processible gold nanoparticles into the nanoholes consisting of patterned substrate through annealing, which facilitates successful fabrication of square lattices of gold n... 详细信息

关键词： Annealing Aspect ratio Gold Nanoparticles self assembly

self-assembly as a route to one-dimensional lanthanum(Ⅲ) salicylaldimine coordination polymer

在线全文

学校读者我要写书评

暂无评论

Journal of Rare Earths 2010年第S1期28卷 51-55页

作者： Wanda Radecka-Paryzek Izabela Pospieszna-Markiewicz Maciej Kubicki Faculty of Chemistry Adam Mickiewicz University

The self-assembled formation of a one-dimensional lanthanum salicylald imine coordination polymer was proved by the X-ray diffraction analysis of new l anthanum(Ⅲ) nitrate complex containing N,N’-bis(salicylidene)-1,5-pentanediami ne ligand(H2L) . It was obtained in situ in a one-step,metal-templated condensa tion of salicylaldehyde with 1,5-pentanediamine(cadaverine,biogenic polyamine) and characterized by microanalysis and spectroscopic(IR,ESI-MS,UV-Vis,and 1 H NMR) data. The [La(NO3) 3(μ-H2L) 2]∞ complex displayed 10-coordinate distorted bicapped dodecahedron geometry with unusual coordination pattern of undeprotonat ed salicylaldimines which acted as μ-bridging ditopic ligands using exclusivel y the oxygens as donor atoms with the nitrogen atoms not being involved in the c oordination environment.

关键词： self assembly lanthanum salicylaldimine crystal structure coordina tion polymer rare earths

self-assembly Behavior of Metal Halide Perovskite Nanocrystals

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Chemistry 2022年第18期40卷 2239-2248页

作者： Zhuoying Yang Shaomin Peng Fan Lin Pengfei Wang Guichuan Xing Lin Yu Key Laboratory of Clean Chemistry Technology of Guangdong Regular Higher Education Institutions Guangdong Provincial Key Laboratory of Plant Resources BiorefinerySchool of Chemical Engineering and Light IndustryGuangdong University of TechnologyGuangzhouGuangdong510006 China Joint Key Laboratory of the Ministry of Education Institute of Applied Physics and Materials EngineeringUniversity of MacaoMacaoSAR999078 China

The self-assembled metal halide perovskite(MHP)nanocrystal superlattices have attracted many researchers due to their exceptional optical and electrical *** bottom-up self-assembly can be facile to generate ideal and periodic *** superlattices’stability can be improved and the photoluminescence lifetime can be extended by an order of ***,due to lack of a comprehensive and systematic understanding of the internal interactions on self-assembled processes now,superlattices cannot be obtained controllably and play full use of their ***,gaining a deep insight of interaction forces about self-assemblies is the premise of designing and controlling the degree of self-assembly so as to prepare ideal *** this review,the definitions and functions of driving forces including van der Waals forces,electrostatic interactions and hydrogen bonds are ***,we aim to explore the dominant factors affecting the driving forces,which can make a difference in the process of MHP *** on current researches,we emphasize on three aspects−the core of nanocrystals,surface ligands and solvents−to clarify their critical roles in controlling the driving ***,the outlooks and perspectives of how to facilitate the MHP self-assembly and their application on blue light emitting diodes are discussed.

关键词： Metal halide perovskite self assembly Nanostructures Surface ligand|Solvent effects

Design and self-assembly of a Novel Tetranuclear Zinc(Ⅱ) Complex via Reaction of 1,3-Thiazolidine-2-thione(tzdtH) with Zn(NO_ 3)_ 2

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chemical Research in Chinese Universities 2006年第5期22卷 665-668页

作者： WEI Xian-yin HUANG Ru-dan YU Li-qiong ZHU Qin-lei ZHANG Zhong-qiang LIU Li-ping Department of Chemistry School of Science Beijing Institute of Technology Beijing 100081 P. R. China Department of Chemistry Hengshui University Hengshui 053000 P. R. China

The self-assembly of clusters in inorganic systems is an interesting subject. The self-assembly of big molecules has been well established in biological systems. In addition, the coordination chemistry of metal-sulfur-nitrogen cluster complexes has been a very active and attracting field for many years as a result of the novelty and versatility of the crystal structures and reactivities of such clusters, as well as their potential applications as the models for the active sites in non-heme proteins. At the same time, there is currently considerable interest in the formation of metal complexes with heterocyclic ligands because of the diverse characteristics of ligands and their consequential wide range of applications.

关键词： self assembly Tetranuclear cluster Zinc complex Crystal structure

Pepsin nanofilm self-assembly on the positively charged poly (ethylene terephthalate) substrate

在线全文

学校读者我要写书评

暂无评论

Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2002年第5期 68-70页

作者：徐立恒陈志春李扬眉吕德水林贤福袁骏

Pepsin was assembled on the surface of prepared poly (ethylene terephthalate) (PET NH 3 +) substrates. The composition and structure of the pepsin / PET NH 3 +assembling films in different condition were characterized... 详细信息

关键词： Pepsin self assembly PET NH 3 + substrate XPS and AFM

Laser-accelerated self-assembly of colloidal particles at the water–air interface

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Chinese Optics Letters 2017年第5期15卷 40-44页

作者：钟敏成王自强李银妹 School of Instrument Science and Opto-electronic Engineering Hefei University of Technology Department of Optics and Optical Engineering University of Science and Technology of China

We experimentally demonstrate that optical tweezers can be used to accelerate the self-assembly of colloidal particles at a water-air interface in this Letter. The thermal flow induced by optical tweezers dominates the growth acceleration at the interface. Furthermore, optical tweezers are used to create a local growth peak at the growing front, which is used to study the preferential incorporation positions of incoming particles. The results show that the particles surfed with a strong Marangoni flow tend to fill the gap and smoothen the steep peaks. When the peak is smooth, the incoming particles incorporate the crystal homogeneously at the growing front.

关键词： Colloids Optical tweezers self assembly

Nanoscale 3D ordered polymer networks

在线全文

学校读者我要写书评

暂无评论

Science China Chemistry 2018年第1期61卷 25-32页

作者： Edwin L. Thomas Department of Materials Science and NanoEngineering Rice University Houston TX 77030 USA

Structures having nanoscale 3D geometries are valuable as multifunctional materials, where multi-continuous microphases can synergistically influence mechanical, optical, transport and other properties. Such very high interface surface to volume ratio structures occur in a variety of materials including natural materials such as butter fly wings and sea urchin exoskeletons and in synthetic self-assembled structures such as surfactant/water systems and block polymers. Quantitative morphological characterization of such complex geometric structures is quite challenging. Unit cell sizes range from 10-300 nm with corresponding feature sizes on the 2-50 nm scale. Since these nanoscale network structures are bicontinuous, when one constituent is removed, the structure is still self supporting. Removal of one component produces a nanoporous material that may be in-filled with another component, or the surfaces of the nanopores can be coated with ultra-thin layers by atomic layer deposition to offer multiftmctional capabilities. Due to the ability to individually tailor the properties of the network（s） and matrix, for example, to create strong dielectric or impedance contrast, such spatially periodic structures are excellent for the interference of waves （electromagnetic for photonic applications and acoustic for phononic applications） that can lead to bandgaps and hence the control of wave propagation in the material. This mini-review will focus on networks formed by bottom up self assembly of block polymers. In addition to structural issues, we emphasize the special physical properties related to bi- or tri-continuous networks.

关键词： self assembly block polymer network morphologies bicontinuous

Growth in solution of hooked Ni–Fe fibers by oriented rotation and attachment approaches

在线全文

学校读者我要写书评

暂无评论

International Journal of Minerals,Metallurgy and Materials 2016年第4期23卷 466-473页

作者： Yong Zhang Fang Liu Wei-ze Zhang School of Materials Science and Engineering Dalian Jiaotong UniversityDalian 116028China The Eighteenth Bureau of Chinese Railway Co.Ltd. Guiyang 561000China

Inspired by the curved branches of fractal trees, hooked Ni–Fe fibers were grown in situ in Ni–Fe composite coatings on a spheroidal graphite cast iron substrate. These hooked Ni–Fe fibers exhibited inclination angles of about 39°, which was in accordance with the theoretical prediction of 37°. Ni–Fe nanostructures self-assembled to form dendrites and evolved into hooked fibers by an oriented attachment reaction. The orientation rotation of Ni–Fe nanostructures played an important role in the growth of curved hooked Ni–Fe fibers. During sliding wear tests, the volume loss of the spheroidal graphite cast iron substrate was 2.2 times as large as that of the Ni–Fe coating reinforced by hooked fibers. The good load-transferring ability of hooked Ni–Fe fibers led to an improvement in their wear properties during wear tests.

关键词： metal fiber fiber growth oriented attachments composite coatings self assembly nanostructures

NOVEL SYNTHESIS OF LONG MULTI-BLOCK HETEROPOLYMER CHAINS WITH AN ORDERED SEQUENCE AND CONTROLLABLE BLOCK LENGTHS

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Polymer Science 2001年第5期19卷 451-454页

作者： Chi Wu Zuo-wei Xie Guang-zhao Zhang Guo-fu Zi Department of Chemistry, The Chinese University of Hong Kong Shatin, N.T., Hong Kong China 香港中文大学香港

It had very long been a dream in polymer science to synthesize long multi-block polymer chains with an orderedchain sequence and controllable block lengths. Using ionic or living free radical polymerization or furnishing each end ofpolymer blocks with a reactive functional group, one can only prepare heteropolymer chains with few long blocks, such asdiblock and triblock copolymers. The most plausible result so far was a pentablock copolymer. Recently, using a combinationof polymer physics and synthetic chemistry, we have invented self-assembly assisted polycondensation (SAAP). Thiscommunication reports the results of using this novel. method to connect 10-100 triblock polymer chains together to formlong multi-block heteropolymer chains with an ordered sequence and controllable block lengths.

关键词： multi-block copolymer self assembly self assembly assisted polypolymerization novel polymer synthesis