scholarly journals Face and edge directed self-assembly of Pd12 tetrahedral nano-cages and their self-sorting

2016 ◽  
Vol 7 (9) ◽  
pp. 5893-5899 ◽  
Author(s):  
Prodip Howlader ◽  
Partha Sarathi Mukherjee
Keyword(s):  
Self Assembly ◽  
Water Soluble ◽  
Self Assembled ◽  
Aromatic Nitro

A di-tetrazole ligand was used to occupy the edges of a tetrahedron to generate an edge-directed self-assembled Pd12 water soluble cage which was used as a vessel to encapsulate aromatic nitro-olefins. A face directed Pd12 tetrahedral cage was also constructed occupying the triangular faces of the tetrahedron by a tri-tetrazole ligand.

Water-induced self-assembly of mixed gelator system (ceramide and lecithin) for edible oil structuring

2019 ◽  
Vol 10 (7) ◽  
pp. 3923-3933 ◽  
Author(s):  
Shenglan Guo ◽  
Mingyue Song ◽  
Xiaoting He ◽  
Fuyu Yang ◽  
Yong Cao ◽  
...  
Keyword(s):  
Sunflower Oil ◽  
Self Assembly ◽  
Edible Oil ◽  
Water Soluble ◽  
Fat Replacers ◽  
Self Assembled

In the presence of a small amount of water, CER and LEC were self-assembled to form oleogels in sunflower oil. This can be used to produce hard-stock fat replacers as well as for incorporating water-soluble nutrients into oil-based products.

Layer-by-layer Stacking Method for 3-D Nano Structure Fabrication Using Block Copolymer Self Assembly

2011 ◽  
Vol 1312 ◽  
Author(s):  
Shin’ichi Warisawa ◽  
Ryosuke Kanameda ◽  
Reo Kometani ◽  
Sunao Ishihara
Keyword(s):  
Self Assembly ◽  
Water Soluble ◽  
Layer By Layer ◽  
Soluble Polymer ◽  
Water Soluble Polymer ◽  
Nano Structure ◽  
Cylindrical Structures ◽  
Patterned Substrate ◽  
Layer Stacking ◽  
Self Assembled

ABSTRACTIn this paper, we present layer-by-layer stacking method to fabricate self-assembled structures of block copolymers (BCP) toward the out-of-plane direction. Layer-by-layer stacking is realized by transferring a BCP film on one substrate to another. Specifically, a water-soluble polymer film is coated on the former substrate, which is placed and fixed in contact with a target substrate. Consequently, the BCP film is released from the substrate and transferred to the target substrate when immersed in de-ionized water. In our experiment, PS-b-PMMA is used to form and transfer self-assembled structures, and polyvinyl alcohol is used as a water-soluble polymer. We prepared two kinds of target substrates; one has horizontal cylindrical structures by BCP self assembly, and the other has groove structures by EB lithography. In the case of BCP patterned substrate, BCP film with vertical cylindrical structures is transferred onto the line structures of BCP. In the case of EB lithography patterned substrate, BCP film with vertical cylindrical structures is transferred in a doubly suspended condition. Furthermore, vertical and horizontal cylindrical structures are also observed to align along the grooves.

Enhanced photophysics from self-assembled cyclometalated Ir(iii) complexes in water

2016 ◽  
Vol 52 (50) ◽  
pp. 7846-7849 ◽  
Author(s):  
Michelle M. McGoorty ◽  
Rony S. Khnayzer ◽  
Felix N. Castellano
Keyword(s):  
Self Assembly ◽  
Water Soluble ◽  
Self Assembled

Two water-soluble anionic cyclometalated Ir(iii) complexes, Ir(ppy)2BPS [1] and Ir(F-mppy)2BPS [2] have been synthesized and display clear evidence of self-assembly in water.

In situ construction of a self-assembled AIE probe for tumor hypoxia imaging

Nanoscale ◽  
2020 ◽  
Vol 12 (14) ◽  
pp. 7509-7513 ◽  
Author(s):  
Tianhao Xue ◽  
Kuanchun Shao ◽  
Jingyuan Xiang ◽  
Xinyi Pan ◽  
Zixuan Zhu ◽  
...  
Keyword(s):  
Fluorescent Probe ◽  
Self Assembly ◽  
Tumor Hypoxia ◽  
Water Soluble ◽  
Hypoxia Imaging ◽  
Self Assembled

A novel hypoxia-responsive fluorescent probe of a hydrophilic azobenzene containing copolymer combined with a carbamate linkage and anionic water-soluble tetraphenylethene by using the in situ self-assembly concept for tumor hypoxia imaging is reported.

Self-Assembled Combination of Graphene with Au Nanoparticle-Doped Copper-Hexacyanoferrate Multilayer for Sensitive Detection of Hydrazine

2012 ◽  
Vol 586 ◽  
pp. 18-23 ◽  
Author(s):  
Dong Jiao Zhao ◽  
Fei Yan ◽  
Yao Fang Xuan ◽  
Xiao Ping Dong ◽  
Feng Na Xi
Keyword(s):  
Self Assembly ◽  
Three Dimensional ◽  
Water Soluble ◽  
Sensitive Detection ◽  
Au Nanoparticle ◽  
Copper Hexacyanoferrate ◽  
Self Assembled ◽  
Modified Graphene ◽  
Net Positive Charge

Based on self-assembled combination of graphene with Au nanoparticle-doped copper hexacyanoferrate (CuHCF) multilayers, a electrochemical biosensor for sensitive detection of hydrazine has been reported. Graphene was functionalized by wrapping with poly(diallyldimethylammonium chloride) (PDDA). Such polyelectrolyte modified graphene (PDDA-G) was water-soluble and possessed net positive charge. Based on electrostatic self-assembly, graphene multilayers modified electrode (ITO/G-M) was fabricated. After binding with mercaptopropionic acid stabled Au nanoparticles (MPA-AuNPs), three dimensional graphene-AuNPs electrode was obtained. CuHCF multilayers were then formed on AuNPs center by successive self-assembly and solution epitaxy. Due to the synergistic effect of graphene and AuNPs, the developed biosensor (ITO/G-M/CuHCF-M) exhibited fast and sensitive amperometric response for the determination of hydrazine in near physiological pH. The linear response for the determination of hydrazine ranged from 4.0 × 10-7 to 1.3 × 10-4 M with a detection limit of 7.2 × 10-8 M. The biosensor exhibited high reproducibility and stability resulted from simple and reproducible self-assembly methodology.

Self-assembly of a water soluble perylene and surfactant into fluorescent supramolecular ensembles sensitive to acetylcholinesterase activity

RSC Advances ◽  
2016 ◽  
Vol 6 (69) ◽  
pp. 64374-64382 ◽  
Author(s):  
G. Grisci ◽  
E. Kozma ◽  
W. Mróz ◽  
K. Pagano ◽  
L. Ragona ◽  
...  
Keyword(s):  
Enzymatic Activity ◽  
Self Assembly ◽  
Acetylcholinesterase Activity ◽  
Water Soluble ◽  
Perylene Diimide ◽  
Self Assembled ◽  
Supramolecular Ensembles

A self-assembled supramolecular probe based on perylene diimide exhibits a ratiometric response to the enzymatic activity of AChE by a surfactochromic effect.

Nanoscale Self-Assembly Using Ion and Electron Beam Techniques: A Rapid Review

MRS Advances ◽  
2020 ◽  
Vol 5 (64) ◽  
pp. 3507-3520
Author(s):  
Chunhui Dai ◽  
Kriti Agarwal ◽  
Jeong-Hyun Cho
Keyword(s):  
Electron Beam ◽  
Self Assembly ◽  
Ion Beam ◽  
Three Dimensional ◽  
The Self ◽  
Stress Generation ◽  
Rapid Review ◽  
High Yield ◽  
3D Nanostructures ◽  
Self Assembled

AbstractNanoscale self-assembly, as a technique to transform two-dimensional (2D) planar patterns into three-dimensional (3D) nanoscale architectures, has achieved tremendous success in the past decade. However, an assembly process at nanoscale is easily affected by small unavoidable variations in sample conditions and reaction environment, resulting in a low yield. Recently, in-situ monitored self-assembly based on ion and electron irradiation has stood out as a promising candidate to overcome this limitation. The usage of ion and electron beam allows stress generation and real-time observation simultaneously, which significantly enhances the controllability of self-assembly. This enables the realization of various complex 3D nanostructures with a high yield. The additional dimension of the self-assembled 3D nanostructures opens the possibility to explore novel properties that cannot be demonstrated in 2D planar patterns. Here, we present a rapid review on the recent achievements and challenges in nanoscale self-assembly using electron and ion beam techniques, followed by a discussion of the novel optical properties achieved in the self-assembled 3D nanostructures.

Self-Assembly of a Chiral Cubic Three-Connected Net from the High Symmetry Molecules C60 and SnI4

2020 ◽  
Author(s):  
Daniel B. Straus ◽  
Robert J. Cava
Keyword(s):  
Organic Synthesis ◽  
Self Assembly ◽  
Van Der Waals ◽  
Van Der Waals Forces ◽  
High Symmetry ◽  
Molecular Chirality ◽  
Chiral Materials ◽  
Self Assembled ◽  
Chiral Centers

The design of new chiral materials usually requires stereoselective organic synthesis to create molecules with chiral centers. Less commonly, achiral molecules can self-assemble into chiral materials, despite the absence of intrinsic molecular chirality. Here, we demonstrate the assembly of high-symmetry molecules into a chiral van der Waals structure by synthesizing crystals of C<sub>60</sub>(SnI<sub>4</sub>)<sub>2</sub> from icosahedral buckminsterfullerene (C<sub>60</sub>) and tetrahedral SnI4 molecules through spontaneous self-assembly. The SnI<sub>4</sub> tetrahedra template the Sn atoms into a chiral cubic three-connected net of the SrSi<sub>2</sub> type that is held together by van der Waals forces. Our results represent the remarkable emergence of a self-assembled chiral material from two of the most highly symmetric molecules, demonstrating that almost any molecular, nanocrystalline, or engineered precursor can be considered when designing chiral assemblies.

scholarly journals Nano- and Micropatterning on Optical Fibers by Bottom-Up Approach: The Importance of Being Ordered

2021 ◽  
Vol 11 (7) ◽  
pp. 3254
Author(s):  
Marco Pisco ◽  
Francesco Galeotti
Keyword(s):  
Optical Fiber ◽  
Optical Fibers ◽  
Self Assembly ◽  
Ordered Structures ◽  
Bottom Up ◽  
Photonic Structures ◽  
Fiber Technology ◽  
Optical Fiber Probes ◽  
Fiber Probes ◽  
Self Assembled

The realization of advanced optical fiber probes demands the integration of materials and structures on optical fibers with micro- and nanoscale definition. Although researchers often choose complex nanofabrication tools to implement their designs, the migration from proof-of-principle devices to mass production lab-on-fiber devices requires the development of sustainable and reliable technology for cost-effective production. To make it possible, continuous efforts are devoted to applying bottom-up nanofabrication based on self-assembly to decorate the optical fiber with highly ordered photonic structures. The main challenges still pertain to “order” attainment and the limited number of implementable geometries. In this review, we try to shed light on the importance of self-assembled ordered patterns for lab-on-fiber technology. After a brief presentation of the light manipulation possibilities concerned with ordered structures, and of the new prospects offered by aperiodically ordered structures, we briefly recall how the bottom-up approach can be applied to create ordered patterns on the optical fiber. Then, we present un-attempted methodologies, which can enlarge the set of achievable structures, and can potentially improve the yielding rate in finely ordered self-assembled optical fiber probes by eliminating undesired defects and increasing the order by post-processing treatments. Finally, we discuss the available tools to quantify the degree of order in the obtained photonic structures, by suggesting the use of key performance figures of merit in order to systematically evaluate to what extent the pattern is really “ordered”. We hope such a collection of articles and discussion herein could inspire new directions and hint at best practices to fully exploit the benefits inherent to self-organization phenomena leading to ordered systems.

scholarly journals Self-assembled interpenetrating networks by orthogonal self assembly of surfactants and hydrogelators

2009 ◽  
Vol 143 ◽  
pp. 345 ◽  
Author(s):  
Aurelie M. Brizard ◽  
Marc C. A. Stuart ◽  
Jan H. van Esch
Keyword(s):  
Self Assembly ◽  
Interpenetrating Networks ◽  
Self Assembled
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