scholarly journals Cooperative Assembly of Asymmetric Carbonaceous Bivalve-Like Superstructures from Multiple Building Blocks

Research ◽  
2018 ◽  
Vol 2018 ◽  
pp. 1-10 ◽  
Author(s):  
Lei Xie ◽  
Haiyan Wang ◽  
Chunhong Chen ◽  
Shanjun Mao ◽  
Yiqing Chen ◽  
...  
Keyword(s):  
Self Assembly ◽  
Materials Science ◽  
Building Blocks ◽  
Hydrothermal Carbonization ◽  
Solid Particles ◽  
Porous Polymers ◽  
One Pot ◽  
In Suit ◽  
Cooperative Assembly ◽  
Ordered Porous

The assembly of superstructures from building blocks is of fundamental importance for engineering materials with distinct morphologies and properties, and deepening our understanding of self-assembly processes in nature. Up to now, it is still a great challenge in materials science to construct multiple-component superstructure with unprecedented architectural complexity and symmetry from molecular. Here, we demonstrate an improved one-pot hydrothermal carbonization of biomass strategy that is capable of fabricating unprecedented asymmetric carbonaceous bivalve-like superstructures with in suit generated solid particles and ordered porous polymers as two kinds of building blocks. In our system, different building blocks can be controllably generated, and they will assemble into complex superstructures through a proposed “cooperative assembly of particles and ordered porous polymers” mechanism. We believe that this assembly principle will open up new potential fields for the synthesis of superstructures with diverse morphologies, compositions, and properties.

DNA-based self-assembly of nanostructures

2017 ◽  
Author(s):  
Joshua D. Carter ◽  
Chenxiang Lin ◽  
Yan Liu ◽  
Hao Yan ◽  
Thomas H. LaBean
Keyword(s):  
Self Assembly ◽  
Materials Science ◽  
Directed Assembly ◽  
Building Blocks ◽  
Hierarchical Assembly ◽  
Synthetic Dna ◽  
Nanoscale Manufacturing ◽  
Covalently Linked ◽  
Design Construction ◽  
Proteins And Peptides

This article examines the DNA-based self-assembly of nanostructures. It first reviews the development of DNA self-assembly and DNA-directed assembly, focusing on the main strategies and building blocks available in the modern molecular construction toolbox, including the design, construction, and analysis of nanostructures composed entirely of synthetic DNA, as well as origami nanostructures formed from a mixture of synthetic and biological DNA. In particular, it considers the stepwise covalent synthesis of DNA nanomaterials, unmediated assembly of DNA nanomaterials, hierarchical assembly, nucleated assembly, and algorithmic assembly. It then discusses DNA-directed assembly of heteromaterials such as proteins and peptides, gold nanoparticles, and multicomponent nanostructures. It also describes the use of complementary DNA cohesion as 'smart glue' for bringing together covalently linked functional groups, biomolecules, and nanomaterials. Finally, it evaluates the potential future of DNA-based self-assembly for nanoscale manufacturing for applications in medicine, electronics, photonics, and materials science.

Zeolates: A Coordination Chemistry View of Metal-Ligand Bonding in Intrazeolite MOCVD Type Precursors and Semiconductor Nanoclusters

1992 ◽  
Vol 277 ◽  
Author(s):  
Geoffrey A. Ozin ◽  
Carol L. Bowes ◽  
Mark R. Steele
Keyword(s):  
Self Assembly ◽  
Materials Science ◽  
Zeolite Y ◽  
Chemical Vapour ◽  
Internal Surface ◽  
Building Blocks ◽  
Structural Features ◽  
Organic Chemical ◽  
Wide Range ◽  
Shape Selective

ABSTRACTVarious MOCVD (metal-organic chemical vapour deposition) type precursors and their self-assembled semiconductor nanocluster products [1] have been investigated in zeolite Y hosts. From analysis of in situ observations (FTIR, UV-vis reflectance, Mössbauer, MAS-NMR) of the reaction sequences and structural features of the precursors and products (EXAFS and Rietveld refinement of powder XRD data) the zeolite is viewed as providing a macrospheroidal, multidendate coordination environment towards encapsulated guests. By thinking about the α- and β-cages of the zeolite Y host effectively as a zeolate ligand composed of interconnected aluminosilicate “crown ether-like” building blocks, the materials chemist is able to better understand and exploit the reactivity and coordination properties of the zeolite internal surface for the anchoring and self-assembly of a wide range of encapsulated guests. This approach helps with the design of synthetic strategies for creating novel guest-host inclusion compounds having possible applications in areas of materials science such as nonlinear optics, quantum electronics, and size/shape selective catalysis.

scholarly journals Aptamer Functionalized DNA Hydrogel for Wise-Stage Controlled Protein Release

2018 ◽  
Vol 8 (10) ◽  
pp. 1941 ◽  
Author(s):  
Chen Liu ◽  
Jialun Han ◽  
Yuxuan Pei ◽  
Jie Du
Keyword(s):  
Self Assembly ◽  
Protein Delivery ◽  
Stable State ◽  
Building Blocks ◽  
One Pot ◽  
Protein Capture ◽  
Whole Process ◽  
Good Biocompatibility ◽  
Release Program ◽  
Dna Hydrogel

With the simple functionalization method and good biocompatibility, an aptamer-integrated DNA hydrogel is used as the protein delivery system with an adjustable release rate and time by using complementary sequences (CSs) as the biomolecular trigger. The aptamer-functionalized DNA hydrogel was prepared via a one-pot self-assembly process from two kinds of DNA building blocks (X-shaped and L-shaped DNA units) and a single-stranded aptamer. The gelling process was achieved under physiological conditions within one minute. In the absence of the triggering CSs, the aptamer grafted in the hydrogel exhibited a stable state for protein-specific capture. While hybridizing with the triggering CSs, the aptamer is turned into a double-stranded structure, resulting in the fast dissociation of protein with a wise-stage controlled release program. Further, the DNA hydrogel with excellent cytocompatibility has been successfully applied to human serum, forming a complex matrix. The whole process of protein capture and release were biocompatible and could not refer to any adverse factor of the protein or cells. Thus, the aptamer-functionalized DNA hydrogel will be a good candidate for controlled protein delivery.

scholarly journals Concurrent Control over Sequence and Dispersity in Multiblock Copolymers

2020 ◽  
Author(s):  
Maria-Nefeli Antonopoulou ◽  
Richard Whitfield ◽  
Nghia Truong ◽  
Athina Anastasaki
Keyword(s):  
Self Assembly ◽  
Material Design ◽  
Building Blocks ◽  
Polymer Science ◽  
One Pot ◽  
Concurrent Control ◽  
Molecular Weights ◽  
Monomer Sequence ◽  
High Dispersity ◽  
Synthetic Macromolecules

<p>Controlling monomer sequence in synthetic macromolecules is a major challenge in polymer science and the order of building blocks has already been demonstrated to determine macromolecular folding, self-assembly and fundamental polymer properties. Dispersity is another key parameter in material design, with both low and high dispersity polymers displaying complementary properties and functions. However, synthetic approaches that can simultaneously control both sequence and dispersity remain experimentally unattainable. Here we report a simple, one pot, and rapid synthesis of sequence-controlled multiblocks with on demand control over dispersity while maintaining high livingness, excellent agreement between theoretical and experimental molecular weights and quantitative yields. Key to our approach is the regulation in chain transfer agent activity during controlled radical polymerization that enables the preparation of multiblocks with gradually ascending (<i>Ɖ</i>=1.16 →1.60), descending (<i>Ɖ</i>=1.66 →1.22), alternating low and high dispersity values (<i>Ɖ</i>=1.17 →1.61 →1.24 →1.70 →1.26) or any combination thereof. The enormous potential of our methodology was further demonstrated through the impressive synthesis of highly ordered pentablock, octablock and decablock copolymers yielding the first generation of multiblocks with concurrent control over both sequence and dispersity.</p>

Mesoporous Hybrid Thin Films: Building Blocks for Complex Materials with Spatial Organization

2007 ◽  
Vol 1007 ◽  
Author(s):  
Galo J. Soler-Illia ◽  
Paula C. Angelomé ◽  
M. Cecilia Fuertes ◽  
Alejandro Wolosiuk ◽  
Sara A. Bilmes ◽  
...  
Keyword(s):  
Thin Films ◽  
Self Assembly ◽  
Spatial Organization ◽  
Sol Gel ◽  
Building Blocks ◽  
Film Deposition ◽  
One Pot ◽  
Selective Functionalization ◽  
Hybrid Thin Films ◽  
Sol Gel Synthesis

ABSTRACTMesoporous Hybrid Thin Films (MHTF) of a variety of compositions and embedded organic functions are produced by combining sol-gel synthesis, template self-assembly and surface modification. One-pot or post-grafting strategies permit to modify the pore surface behavior. Highly controlled MHTF issued from a reproducible and modular synthesis can be used as building blocks for more complex structures, presenting order at larger scales, and novel properties derived from this multiscale order. Multilayer stacks of MHTF presenting specific and different functions and frameworks located in a well-defined position have been produced by combining sequential film deposition, selective functionalization and dissolution. These systems present new properties such as localized chemistry or modulable photonic crystal behavior.

scholarly journals Spontaneous Aminolytic Cyclization and Self-Assembly of Dipeptide Methyl Esters in Water

2020 ◽  
Author(s):  
Charalampos Pappas ◽  
Nadeesha Wijerathne ◽  
Jugal Kishore Sahoo ◽  
Ankit Jain ◽  
Daniela Kroiss ◽  
...  
Keyword(s):  
Self Assembly ◽  
Chemical Nature ◽  
Methyl Esters ◽  
Building Blocks ◽  
Short Peptides ◽  
Cyclic Dipeptides ◽  
Spontaneous Formation ◽  
And Function ◽  
Cooperative Assembly

Dipeptides are known to spontaneously cyclize to diketopiperazines, and in some cases these cyclic dipeptides have been shown to self-assemble to form supramolecular nanostructures.<b> </b>Herein, we demonstrate the <i>in situ</i> cyclization of dipeptide methyl esters in aqueous buffer by intramolecular aminolysis, leading to the formation of diverse supramolecular nanostructures. The chemical nature of the amino acid side chains dictates the supramolecular arrangement and resulting nanoscale architectures. For c[LF], supramolecular gels are formed, and the concentration of starting materials influences the mechanical properties of hydrogels. Moreover, by adding metalloporphyrin to the starting dipeptide ester solution, these become incorporated through cooperative assembly,<b> </b>resulting in the formation of nanofibers able to catalyse the oxidation of organic phenol in water. The approach taken here, which combines the chemically activated assembly with the versatility of short peptides might pave the way for achieving the spontaneous formation of supramolecular order and function using simple building blocks.<br>

scholarly journals Concurrent Control over Sequence and Dispersity in Multiblock Copolymers

2020 ◽  
Author(s):  
Maria-Nefeli Antonopoulou ◽  
Richard Whitfield ◽  
Nghia Truong ◽  
Athina Anastasaki
Keyword(s):  
Self Assembly ◽  
Material Design ◽  
Building Blocks ◽  
Polymer Science ◽  
One Pot ◽  
Concurrent Control ◽  
Molecular Weights ◽  
Monomer Sequence ◽  
High Dispersity ◽  
Synthetic Macromolecules

<p>Controlling monomer sequence in synthetic macromolecules is a major challenge in polymer science and the order of building blocks has already been demonstrated to determine macromolecular folding, self-assembly and fundamental polymer properties. Dispersity is another key parameter in material design, with both low and high dispersity polymers displaying complementary properties and functions. However, synthetic approaches that can simultaneously control both sequence and dispersity remain experimentally unattainable. Here we report a simple, one pot, and rapid synthesis of sequence-controlled multiblocks with on demand control over dispersity while maintaining high livingness, excellent agreement between theoretical and experimental molecular weights and quantitative yields. Key to our approach is the regulation in chain transfer agent activity during controlled radical polymerization that enables the preparation of multiblocks with gradually ascending (<i>Ɖ</i>=1.16 →1.60), descending (<i>Ɖ</i>=1.66 →1.22), alternating low and high dispersity values (<i>Ɖ</i>=1.17 →1.61 →1.24 →1.70 →1.26) or any combination thereof. The enormous potential of our methodology was further demonstrated through the impressive synthesis of highly ordered pentablock, octablock and decablock copolymers yielding the first generation of multiblocks with concurrent control over both sequence and dispersity.</p>

Bionanocomposite from self-assembled building blocks of nacre-like crystalline polymorph of chitosan with clay nanoplatelets

RSC Advances ◽  
2016 ◽  
Vol 6 (40) ◽  
pp. 33501-33509 ◽  
Author(s):  
Sergey Sarin ◽  
Sophia Kolesnikova ◽  
Irina Postnova ◽  
Chang-Sik Ha ◽  
Yury Shchipunov
Keyword(s):  
Self Assembly ◽  
Building Blocks ◽  
One Pot ◽  
Evaporation Induced Self Assembly ◽  
Self Assembled ◽  
Pot Technique

Films containing a new crystalline polymorph are prepared by a one-pot technique combining the formation of building blocks of clay nanoplatelets with chitosan macromolecules and their evaporation-induced self-assembly.

scholarly journals An Amphiphilic-DNA Platform for the Design of Crystalline Frameworks with Programmable Structure and Functionality

2018 ◽  
Author(s):  
Ryan A. Brady ◽  
Nicholas J. Brooks ◽  
Vito Foderà ◽  
Pietro Cicuta ◽  
Lorenzo Di Michele
Keyword(s):  
Self Assembly ◽  
Rational Design ◽  
Dna Nanotechnology ◽  
Building Blocks ◽  
Lattice Parameter ◽  
One Pot ◽  
Dna Crystals ◽  
Dna Materials ◽  
Fine Tune ◽  
Highly Porous

<div> <div> <div> <p>The reliable preparation of functional, ordered, nanostructured frameworks would be a game changer for many emerging technologies, from energy storage to nanomedicine. Underpinned by the excellent molecular recognition of nucleic acids, along with their facile synthesis and breadth of available functionalizations, DNA Nanotechnology is widely acknowledged as a prime route for the rational design of nanostructured materials. Yet, the preparation of crystalline DNA frameworks with programmable structure and functionality remains a challenge. Here we demonstrate the potential of simple amphiphilic DNA motifs, dubbed C-stars, as a versatile platform for the design of programmable DNA crystals. In contrast to all-DNA materials, in which structure depends on the precise molecular details of individual building blocks, the self-assembly of C-stars is controlled uniquely by their topology and symmetry. Exploiting this robust self-assembly principle we design a range of topologically identical, but structurally and chemically distinct C-stars that following a one-pot reaction self- assemble into highly porous, functional, crystalline frameworks. Simple design variations allow us to fine-tune the lattice parameter and thus control the partitioning of macromolecules within the frameworks, embed responsive mo- tifs that can induce isothermal disassembly, and include chemical moieties to capture target proteins specifically and reversibly.</p></div> </div> </div>

scholarly journals An Amphiphilic-DNA Platform for the Design of Crystalline Frameworks with Programmable Structure and Functionality

2018 ◽  
Author(s):  
Ryan A. Brady ◽  
Nicholas J. Brooks ◽  
Vito Foderà ◽  
Pietro Cicuta ◽  
Lorenzo Di Michele
Keyword(s):  
Self Assembly ◽  
Rational Design ◽  
Dna Nanotechnology ◽  
Building Blocks ◽  
Lattice Parameter ◽  
One Pot ◽  
Dna Crystals ◽  
Dna Materials ◽  
Fine Tune ◽  
Highly Porous

<div> <div> <div> <p>The reliable preparation of functional, ordered, nanostructured frameworks would be a game changer for many emerging technologies, from energy storage to nanomedicine. Underpinned by the excellent molecular recognition of nucleic acids, along with their facile synthesis and breadth of available functionalizations, DNA Nanotechnology is widely acknowledged as a prime route for the rational design of nanostructured materials. Yet, the preparation of crystalline DNA frameworks with programmable structure and functionality remains a challenge. Here we demonstrate the potential of simple amphiphilic DNA motifs, dubbed C-stars, as a versatile platform for the design of programmable DNA crystals. In contrast to all-DNA materials, in which structure depends on the precise molecular details of individual building blocks, the self-assembly of C-stars is controlled uniquely by their topology and symmetry. Exploiting this robust self-assembly principle we design a range of topologically identical, but structurally and chemically distinct C-stars that following a one-pot reaction self- assemble into highly porous, functional, crystalline frameworks. Simple design variations allow us to fine-tune the lattice parameter and thus control the partitioning of macromolecules within the frameworks, embed responsive mo- tifs that can induce isothermal disassembly, and include chemical moieties to capture target proteins specifically and reversibly.</p></div> </div> </div>

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