共查询到20条相似文献，搜索用时 15 毫秒
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Morag A Philosof-Mazor L Volinsky R Mentovich E Richter S Jelinek R 《Advanced materials (Deerfield Beach, Fla.)》2011,23(37):4327-4331
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Xinwei Ge Pu Chun Ke Thomas P. Davis Feng Ding 《Small (Weinheim an der Bergstrasse, Germany)》2015,11(37):4894-4899
It has been under debate if a self‐assembled monolayer (SAM) with two immiscible ligands of different chain lengths and/or bulkiness can form a stripe‐like pattern on a nanoparticle (NP) surface. The entropic gain upon such pattern formation due to difference in chain lengths and/or bulkiness has been proposed as the driving force in literature. Using atomistic discrete molecular dynamics simulations it is shown that stripe‐like pattern could indeed emerge, but only for a subset of binary SAM systems. In addition to entropic contributions, the formation of a striped pattern also strongly depends upon interligand interactions governed by the physicochemical properties of the ligand constituents. Due to the interplay between entropy and enthalpy, a binary SAM system can be categorized into three different types depending on whether and under what condition a striped pattern can emerge. The results help clarify the ongoing debate and our proposed principle can aid in the engineering of novel binary SAMs on a NP surface. 相似文献
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Matthew Rycenga Joseph M. McLellan Younan Xia 《Advanced materials (Deerfield Beach, Fla.)》2008,20(12):2416-2420
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Benjamin Le Ouay Stefan Guldin Zhi Luo Sergio Allegri Francesco Stellacci 《Advanced Materials Interfaces》2016,3(15)
A synthetic route is presented for the realization of ultrathin freestanding nanoparticle membranes that are built of gold nanoparticles protected with trimethoxysilane‐bearing ligands. The mechanism relies on interfacial assembly in an oil–water mixture. Upon shaking, nanoparticles are transported to the liquid–liquid interface of the oil droplets and form a network through the formation of Si–O–Si bridges. Reticulation of the nanoparticles during the dynamic process of droplet coalescence allows the formation of ultrathin membranes of only a few nanoparticle layers in thickness and square centimeters in dimension. The membranes can be manipulated, such as locally perforated, without causing their collapse. Furthermore they can be transferred onto solid or holey substrates. The synthetic route is compatible with a coassembly of dopants. As an example, membranes were doped with single walled carbon nanotubes, which resulted in a sizable increase of their electric conductivity. 相似文献
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利用Ｌａｎｇｍｕｉｒ膜天平“面膨胀计”研究二状态下的聚合反应具有两个方面的意义，即一方面通过高分子化制备聚合的单分子膜和ＬＢ膜，克服膜的 强度低、耐热和耐介质性能差的缺点，使之实用化；另一方面通过ＬＢ技术实现分子的有目的组合来合成全新品种的聚合物，为设计新一代高分子的超分子结构以及研究低维状态下的聚合反应开辟新路径。 相似文献
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Karim Aissou Muhammad Mumtaz Giuseppe Portale Cyril Brochon Eric Cloutet Guillaume Fleury Georges Hadziioannou 《Small (Weinheim an der Bergstrasse, Germany)》2017,13(20)
The directed self‐assembly of diblock copolymer chains (poly(1,1‐dimethyl silacyclobutane)‐block‐polystyrene, PDMSB‐b‐PS) into a thin film double gyroid structure is described. A decrease of the kinetics of a typical double‐wave pattern formation is reported within the 3D‐nanostructure when the film thickness on mesas is lower than the gyroid unit cell. However, optimization of the solvent‐vapor annealing process results in very large grains (over 10 µm²) with specific orientation (i.e., parallel to the air substrate) and direction (i.e., along the groove direction) of the characteristic (211) plane, demonstrated by templating sub‐100‐nm‐thick PDMSB‐b‐PS films. 相似文献
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Naureen Akhtar Alexey O. Polyakov Aisha Aqeel Pavlo Gordiichuk Graeme R. Blake Jacob Baas Heinz Amenitsch Andreas Herrmann Petra Rudolf Thomas T. M. Palstra 《Small (Weinheim an der Bergstrasse, Germany)》2014,10(23):4912-4919
Perovskite‐based organic–inorganic hybrids hold great potential as active layers in electronics or optoelectronics or as components of biosensors. However, many of these applications require thin films grown with good control over structure and thickness—a major challenge that needs to be addressed. The work presented here is an effort towards this goal and concerns the layer‐by‐layer deposition at ambient conditions of ferromagnetic organic–inorganic hybrids consisting of alternating CuCl4‐octahedra and organic layers. The Langmuir‐Blodgett technique used to assemble these structures provides intrinsic control over the molecular organization and film thickness down to the molecular level. Magnetic characterization reveals that the coercive field for these thin films is larger than that for solution‐grown layered bulk crystals. The strategy presented here suggests a promising cost effective route to facilitate the excellently controlled growth of sophisticated materials on a wide variety of substrates that have properties relevant for the high density storage media and spintronic devices. 相似文献
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Son JG Hannon AF Gotrik KW Alexander-Katz A Ross CA 《Advanced materials (Deerfield Beach, Fla.)》2011,23(5):634-639
Poly(styrene-block-dimethylsiloxane) (PS-b-PDMS) block copolymers with a period as low as 13 nm have been self-assembled on a template formed from PS-b-PDMS of a 34–40 nm period, which is itself templated by micron-scale substrate features prepared using conventional lithography. This hierarchical process provides a simple method for directing the self-assembly of sub-10 nm features and registering them on the substrate. 相似文献
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Tumor Therapy: NIR Light Propulsive Janus‐like Nanohybrids for Enhanced Photothermal Tumor Therapy (Small 39/2016) 
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下载免费PDF全文 Pei‐Pei Yang Yun‐Gang Zhai Guo‐Bin Qi Yao‐Xin Lin Qiang Luo Yang Yang An‐Ping Xu Chao Yang Yong‐Sheng Li Lei Wang Hao Wang 《Small (Weinheim an der Bergstrasse, Germany)》2016,12(39):5422-5422