scholarly journals Mono-patchy zwitterionic microcolloids as building blocks for pH-controlled self-assembly

Soft Matter ◽  
2019 ◽  
Vol 15 (11) ◽  
pp. 2430-2438 ◽  
Author(s):  
Fatemeh Naderi Mehr ◽  
Dmitry Grigoriev ◽  
Nikolay Puretskiy ◽  
Alexander Böker
Keyword(s):  
Self Assembly ◽  
Building Blocks ◽  
Free Surfaces ◽  
Patchy Particles ◽  
Self Assembled ◽  
Oppositely Charged ◽  
Ph Controlled

Not only in theory but also experimentally, mono-patchy particles can be self-assembled via pH-controlled electrostatic attractions between their oppositely charged patchy and patch-free surfaces.

scholarly journals Mikto-Arm Stars as Soft-Patchy Particles: From Building Blocks to Mesoscopic Structures

Polymers ◽  
2021 ◽  
Vol 13 (7) ◽  
pp. 1114
Author(s):  
Petra Bačová ◽  
Dimitris G. Mintis ◽  
Eirini Gkolfi ◽  
Vagelis Harmandaris
Keyword(s):  
Polymer Nanocomposites ◽  
Self Assembly ◽  
Nearest Neighbor ◽  
Building Blocks ◽  
Model System ◽  
The Self ◽  
Mutual Orientation ◽  
Patchy Particles ◽  
Self Assembled ◽  
The Individual

We present an atomistic molecular dynamics study of self-assembled mikto-arm stars, which resemble patchy-like particles. By increasing the number of stars in the system, we propose a systematic way of examining the mutual orientation of these fully penetrable patchy-like objects. The individual stars maintain their patchy-like morphology when creating a mesoscopic (macromolecular) self-assembled object of more than three stars. The self-assembly of mikto-arm stars does not lead to a deformation of the stars, and their shape remains spherical. We identified characteristic sub-units in the self-assembled structure, differing by the mutual orientation of the nearest neighbor stars. The current work aims to elucidate the possible arrangements of the realistic, fully penetrable patchy particles in polymer matrix and to serve as a model system for further studies of nanostructured materials or all-polymer nanocomposites using the mikto-arm stars as building blocks.

scholarly journals Self-Assembly of Shape-Tunable Oblate Colloidal Particles into Orientationally Ordered Crystals, Glassy Crystals and Plastic Crystals

Soft Matter ◽  
2021 ◽  
Author(s):  
Jiawei Lu ◽  
Xiangyu Bu ◽  
Xinghua Zhang ◽  
Bing Liu
Keyword(s):  
Crystal Structures ◽  
Self Assembly ◽  
Colloidal Particles ◽  
Building Blocks ◽  
Fundamental Question ◽  
The Self ◽  
Plastic Crystals ◽  
Self Assembled ◽  
Glassy Crystals ◽  
The Relationship

The shapes of colloidal particles are crucial to the self-assembled superstructures. Understanding the relationship between the shapes of building blocks and the resulting crystal structures is an important fundamental question....

Self-Assembly of Proteins into Three-Dimensional Structures Using Bio-Conjugation

2014 ◽  
Vol 1663 ◽  
Author(s):  
Garima Thakur ◽  
Kovur Prashanthi ◽  
Thomas Thundat
Keyword(s):  
Self Assembly ◽  
Three Dimensional ◽  
Gold Surface ◽  
Building Blocks ◽  
Growth Conditions ◽  
Base Layer ◽  
Chemical Structures ◽  
Molecular Building Blocks ◽  
Ring Structures ◽  
Self Assembled

ABSTRACTSelf–assembly of molecular building blocks provides an interesting route to produce well-defined chemical structures. Tailoring the functionalities on the building blocks and controlling the time of self-assembly could control the properties as well as the structure of the resultant patterns. Spontaneous self-assembly of biomolecules can generate bio-interfaces for myriad of potential applications. Here we report self-assembled patterning of human serum albumin (HSA) protein in to ring structures on a polyethylene glycol (PEG) modified gold surface. The structure of the self-assembled protein molecules and kinetics of structure formation entirely revolved around controlling the nucleation of the base layer. The formation of different sizes of ring patterns is attributed to growth conditions of the PEG islands for bio-conjugation. These assemblies might be beneficial in forming structurally ordered architectures of active proteins such as HSA or other globular proteins.

scholarly journals Self-assembled liposomal nanoparticles in photodynamic therapy

2013 ◽  
Vol 5 (3) ◽  
Author(s):  
Magesh Sadasivam ◽  
Pinar Avci ◽  
Gaurav K. Gupta ◽  
Shanmugamurthy Lakshmanan ◽  
Rakkiyappan Chandran ◽  
...  
Keyword(s):  
Photodynamic Therapy ◽  
Self Assembly ◽  
Building Blocks ◽  
Dimensional Structure ◽  
3 Dimensional ◽  
Drug Delivery Vehicles ◽  
Judicious Choice ◽  
Delivery Vehicles ◽  
Self Assembled ◽  
Liposomal Nanoparticles

AbstractPhotodynamic therapy (PDT) employs the combination of non-toxic photosensitizers (PS) together with harmless visible light of the appropriate wavelength to produce reactive oxygen species that kill unwanted cells. Because many PS are hydrophobic molecules prone to aggregation, numerous drug delivery vehicles have been tested to solubilize these molecules, render them biocompatible and enhance the ease of administration after intravenous injection. The recent rise in nanotechnology has markedly expanded the range of these nanoparticulate delivery vehicles beyond the well-established liposomes and micelles. Self-assembled nanoparticles are formed by judicious choice of monomer building blocks that spontaneously form a well-oriented 3-dimensional structure that incorporates the PS when subjected to the appropriate conditions. This self-assembly process is governed by a subtle interplay of forces on the molecular level. This review will cover the state of the art in the preparation and use of self-assembled liposomal nanoparticles within the context of PDT.

Self-assembled 4-(1,2-diphenylbut-1-en-1-yl)aniline based nanoparticles: podophyllotoxin and aloin as building blocks

2017 ◽  
Vol 15 (5) ◽  
pp. 1106-1109 ◽  
Author(s):  
Gaia Fumagalli ◽  
Michael S. Christodoulou ◽  
Benedetta Riva ◽  
Inigo Revuelta ◽  
Cristina Marucci ◽  
...  
Keyword(s):  
Self Assembly ◽  
Building Blocks ◽  
Self Assembled

The ability of 4-(1,2-diphenylbut-1-en-1-yl)aniline as a self-assembly inducer is reported.

scholarly journals Reorganization of Self-Assembled DNA-Based Polymers Using Orthogonally Addressable Building Blocks

2021 ◽  
Author(s):  
Serena Gentile ◽  
Erica Del Grosso ◽  
Leonard J. Prins ◽  
Francesco Ricci
Keyword(s):  
Self Assembly ◽  
Rational Design ◽  
Building Blocks ◽  
Binding Domain ◽  
Non Covalent Interactions ◽  
Sticky Ends ◽  
Self Assembled ◽  
Block Structures ◽  
Covalent Interactions

Taking advantage of the addressability and programmability of DNA/DNA non-covalent interactions we report here the rational design of orthogonal DNA-based addressable tiles that self-assemble into polymer-like structures that can be reconfigured and reorganized by external inputs. The different tiles share the same 5-nucleotide sticky ends responsible for self-assembly but are rationally designed to contain a specific regulator-binding domain that can be orthogonally targeted by different DNA regulator strands (activators and inhibitors). We show that by sequentially adding specific activators and inhibitors it is possible to re-organize in a dynamic and reversible way the formed polymer-like structures to display well-defined distributions: homopolymers made of a single tile, random polymers in which different tiles are distributed randomly and block structures in which the tiles are organized in segments.

scholarly journals Multilayer Self-Assemblies as Electronic and Optical Materials

1997 ◽  
Vol 488 ◽  
Author(s):  
DeQuan Li ◽  
M. Lütt ◽  
Xiaobo Shi ◽  
M. R. Fitzsimmons
Keyword(s):  
Thin Film ◽  
Self Assembly ◽  
Film Growth ◽  
Building Blocks ◽  
Layer Growth ◽  
The Self ◽  
Growth Surface ◽  
Layer By Layer ◽  
Self Assembled ◽  
Average Electron

AbstractThe layer-by-layer growth of film structures consisting of sequential depositions of oppositely charged polymers and macrocycles (ring-shaped molecules) have been constructed using molecular self-assembly techniques. These self-assembled thin films were characterized with X-ray reflectometry, which yielded (1) the average electron density, (2) the average thicknesses, and (3) the roughness of the growth surface of the self-assembled multilayer of macrocycles and polymers. These observations suggest that inorganic-organic interactions play an important role during the initial stages of thin-film growth, but less so as the thin film becomes thicker. Optical absorption techniques were also used to characterize the self-assembled multilayers. Phorphyrin and phthalocyanine derivatives were chosen as the building blocks of the self-assembled multilayers because of their interesting optical properties.

Static and dynamic screening effects in the electrostatic self-assembly of nano-particles

2014 ◽  
Vol 16 (46) ◽  
pp. 25449-25460 ◽  
Author(s):  
V. N. Kuzovkov ◽  
E. A. Kotomin
Keyword(s):  
Self Assembly ◽  
3D Structure ◽  
Nano Particles ◽  
Dynamic Screening ◽  
Charged Nanoparticles ◽  
Self Assembled ◽  
Oppositely Charged

3D structure of self-assembled and oppositely charged nanoparticles.

SELF-ASSEMBLY FABRICATION OF GRAPHENE-BASED MATERIALS WITH OPTICAL–ELECTRONIC, TRANSIENT OPTICAL AND ELECTROCHEMICAL PROPERTIES

2012 ◽  
Vol 11 (06) ◽  
pp. 1240032 ◽  
Author(s):  
JIAYI ZHU ◽  
JUNHUI HE
Keyword(s):  
Thin Film ◽  
Thin Films ◽  
Self Assembly ◽  
Large Scale ◽  
Building Blocks ◽  
Precipitation Method ◽  
Hybrid Thin Film ◽  
Lbl Assembly ◽  
Metal Metal ◽  
Oppositely Charged

Directed self-assembly of nano or microsized materials as building blocks is a very exciting research topic to construct large-scale but still uniform 2D or 3D architectures. Graphene shows great potential as an advanced building block for fabricating varied graphene-based functional films or architectures together with other metal, metal oxide and semiconductor nanomaterials. In our work, we demonstrated an approach to fabrication of flexible, transparent conductive thin films via layer-by-layer (LbL) assembly of oppositely charged reduced graphene oxides (RGOs). The graphene thin films showed remarkable optical–electronic properties. Inspired by this, we further fabricated transparent conductive hybrid thin film via LbL assembly of oppositely charged RGO nanosheets and Pt nanoparticles. The graphene– Pt hybrid thin film showed transient optical property as well as appropriate conductive and wetting properties. Moreover, we demonstrated graphene wrapped- MnO2 (GW- MnO2 ) nanocomposites by self-assembly of honeycomb MnO2 nanospheres and graphene sheets via an electrostatic co-precipitation method. The hybrid materials had a good electrochemical performance.

scholarly journals Patchy Nanoparticle Synthesis and Self-Assembly

2020 ◽  
Author(s):  
Ahyoung Kim ◽  
Lehan Yao ◽  
Falon Kalutantirige ◽  
Shan Zhou ◽  
Qian Chen
Keyword(s):  
Self Assembly ◽  
Nanoparticle Synthesis ◽  
Building Blocks ◽  
Design And Synthesis ◽  
Patchy Particles ◽  
Living Organisms ◽  
Directional Bonding ◽  
Patchy Nanoparticles ◽  
Assembly Pathways ◽  
Physical Principles

Biological building blocks (i.e., proteins) are encoded with the information of target structure into the chemical and morphological patches, guiding their assembly into the levels of functional structures that are crucial for living organisms. Learning from nature, researchers have been attracted to the artificial analogues, “patchy particles,” which have controlled geometries of patches that serve as directional bonding sites. However, unlike the abundant studies of micron-scale patchy particles, which demonstrated complex assembly structures and unique behaviors attributed to the patches, research on patchy nanoparticles (NPs) has remained challenging. In the present chapter, we discuss the recent understandings on patchy NP design and synthesis strategies, and physical principles of their assembly behaviors, which are the main factors to program patchy NP self-assembly into target structures that cannot be achieved by conventional non-patched NPs. We further summarize the self-assembly of patchy NPs under external fields, in simulation, and in kinetically controlled assembly pathways, to show the structural richness patchy NPs bring. The patchy NP assembly is novel by their structures as well as the multicomponent features, and thus exhibits unique optical, chemical, and mechanical properties, potentially aiding applications in catalysts, photonic crystals, and metamaterials as well as fundamental nanoscience.

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