Shape Complementarity Modulated Self-Assembly of Nanoring and Nanosphere Hetero-nanostructures

2020 ◽  
Vol 142 (27) ◽  
pp. 11680-11684
Author(s):  
Na Li ◽  
Fan Wu ◽  
Zihong Han ◽  
Xiaofeng Wang ◽  
Yi Liu ◽  
...  
Keyword(s):  
Self Assembly ◽  
Shape Complementarity

scholarly journals Programmable Self-Assembly of Gold Nanoarrows via Regioselective Adsorption

Research ◽  
2021 ◽  
Vol 2021 ◽  
pp. 1-10
Author(s):  
Cheng Chen ◽  
Liheng Zheng ◽  
Fucheng Guo ◽  
Zheyu Fang ◽  
Limin Qi
Keyword(s):  
Self Assembly ◽  
Building Blocks ◽  
The Self ◽  
Colloidal Nanoparticles ◽  
Local Curvature ◽  
Shape Complementarity ◽  
Regioselective Functionalization ◽  
Geometric Morphology ◽  
Multiple Assembly

Programing the self-assembly of colloidal nanoparticles into predetermined superstructures represents an attractive strategy to realize functional assemblies and novel nanodevices, but it remains a challenge. Herein, gold nanoarrows (GNAs) showing a distinct convex-concave structure were employed as unique building blocks for programmable self-assembly involving multiple assembly modes. Regioselective adsorption of 1,10-decanedithiol on the vertexes, edges, and facets of GNAs allowed for programmable self-assembly of GNAs with five distinct assembly modes, and regioselective blocking with 1-dodecanethiol followed by adsorption of 1,10-decanedithiol gave rise to programmable self-assembly with six assembly modes including three novel wing-engaged modes. The assembly mode was essentially determined by regioselective adsorption of the dithiol linker dictated by the local curvature together with the shape complementarity of GNAs. This approach reveals how the geometric morphology of nanoparticles affects their regioselective functionalization and drives their self-assembly.

scholarly journals Design of catalytic metal-organic assemblies via shape complementarity and conformational constraints in dual curvature ligands

2021 ◽  
Author(s):  
Cui-Lian Liu ◽  
Eduard Bobylev ◽  
Brice Kauffmann ◽  
Koen Robeyns ◽  
Yann Garcia ◽  
...  
Keyword(s):  
Self Assembly ◽  
Building Blocks ◽  
Alder Reaction ◽  
The Self ◽  
Supramolecular Catalysis ◽  
Shape Complementarity ◽  
Large Structures ◽  
Metal Organic ◽  
Non Covalent Interactions ◽  
Covalent Interactions

Non-covalent interactions play an essential role in the folding and self-assembly of large biological assemblies. These interactions are not only a driving force for the formation of large structures but also control conformation and com-plementary shapes of subcomponents that promote the diversity of structures and functions of the resulting assemblies. Understanding how non-covalent interactions direct self-assembly and the effect of conformation and complementary shapes on self-assembled structures will help design artificial supramolecular systems with extended components and functions. Herein, we develop a strategy for controlling more complex self-assembly with lower symmetry and flexible building blocks that combine endohedral non-covalent interactions with a dual curvature in the ligand backbone to give additional shape complementarity. A Diels-Alder reaction was used to break the symmetry of the diazaanthracene units of the ligands to give dual curvature ligands with different shapes and endohedral groups (L1-L3). The self-assembly studies of these ligands demonstrated that non-covalent interactions and shape complementary effectively control the self-assembly and enable the design of cages for supramolecular catalysis.

scholarly journals Shape and size complementarity induced formation of supramolecular protein assemblies with metal-oxo clusters

2020 ◽  
Author(s):  
Laurens Vandebroek ◽  
Hiroki Noguchi ◽  
Kenichi Kamata ◽  
Jeremy R. H. Tame ◽  
Luc Van Meervelt ◽  
...  
Keyword(s):  
Self Assembly ◽  
Crystal Packing ◽  
Supramolecular Assemblies ◽  
Protein Assemblies ◽  
X Ray Crystallography ◽  
Shape Complementarity ◽  
Solution Studies ◽  
The Family ◽  
Hybrid Biomaterials ◽  
Metal Oxo Clusters

AbstractThe controlled formation of protein supramolecular assemblies is challenging but it could provide an important route for the development of hybrid biomaterials. In this work, we demonstrate formation of well-defined complexes formed between the 8-fold symmetrical designer protein Tako8 and soluble metal-oxo clusters from the family of Anderson-Evans, Keggin and ZrIV- substituted Wells-Dawson polyoxometalates. A combination of x-ray crystallography and solution studies showed that metal-oxo clusters are able to serve as linker nodes for the bottom-up creation of protein based supramolecular assemblies. Our findings indicate that clusters with larger size and negative charge are capable of modulating the crystal packing of the protein, highlighting the need for a size and shape complementarity with the protein node for optimal alteration of the crystalline self-assembly.

Crystallization and self-assembly of shape-complementary sequence-defined peptoids

2021 ◽  
Author(s):  
Sunting Xuan ◽  
Xi Jiang ◽  
Nitash P. Balsara ◽  
Ronald N. Zuckermann
Keyword(s):  
Protein Binding ◽  
Self Assembly ◽  
Biological Systems ◽  
Base Pairing ◽  
Complementary Sequence ◽  
Binding Interactions ◽  
Crystal Lattices ◽  
Shape Complementarity ◽  
Dna Base

Shape complementarity between polymers is a hallmark of biological systems (e.g. DNA base pairing and protein binding interactions). Here we explore the role of shape complementarity between sequence-defined N-alkyl peptoids in crystal lattices.

In vitro and in vivo polysaccharides assembly: ultrastructural and cytochemical study of growing plant cell wall components.

1978 ◽  
Vol 36 (2) ◽  
pp. 434-435
Author(s):  
D. Reis ◽  
B. Vian ◽  
J. C. Roland
Keyword(s):  
Cell Wall ◽  
Self Assembly ◽  
Plant Cell Wall ◽  
Higher Plants ◽  
Three Dimensional ◽  
Cytochemical Study ◽  
Wall Components

Wall morphogenesis in higher plants is a problem still open to controversy. Until now the possibility of a transmembrane control and the involvement of microtubules were mostly envisaged. Self-assembly processes have been observed in the case of walls of Chlamydomonas and bacteria. Spontaneous gelling interactions between xanthan and galactomannan from Ceratonia have been analyzed very recently. The present work provides indications that some processes of spontaneous aggregation could occur in higher plants during the formation and expansion of cell wall.Observations were performed on hypocotyl of mung bean (Phaseolus aureus) for which growth characteristics and wall composition have been previously defined.In situ, the walls of actively growing cells (primary walls) show an ordered three-dimensional organization (fig. 1). The wall is typically polylamellate with multifibrillar layers alternately transverse and longitudinal. Between these layers intermediate strata exist in which the orientation of microfibrils progressively rotates. Thus a progressive change in the morphogenetic activity occurs.

The Nature of Rapidly Extracted Phycocyanin from the Blue-Green Alga Plectonema Boryanum

1971 ◽  
Vol 29 ◽  
pp. 366-367
Author(s):  
M. Kessel ◽  
R. MacColl
Keyword(s):  
Self Assembly ◽  
Analytical Ultracentrifugation ◽  
Uranyl Acetate ◽  
The Self ◽  
Major Protein ◽  
Subunit Structure ◽  
Blue Green Alga ◽  
Thin Sections ◽  
Blue Green Algae ◽  
Cacodylate Buffer

The major protein of the blue-green algae is the biliprotein, C-phycocyanin (Amax = 620 nm), which is presumed to exist in the cell in the form of distinct aggregates called phycobilisomes. The self-assembly of C-phycocyanin from monomer to hexamer has been extensively studied, but the proposed next step in the assembly of a phycobilisome, the formation of 19s subunits, is completely unknown. We have used electron microscopy and analytical ultracentrifugation in combination with a method for rapid and gentle extraction of phycocyanin to study its subunit structure and assembly.To establish the existence of phycobilisomes, cells of P. boryanum in the log phase of growth, growing at a light intensity of 200 foot candles, were fixed in 2% glutaraldehyde in 0.1M cacodylate buffer, pH 7.0, for 3 hours at 4°C. The cells were post-fixed in 1% OsO4 in the same buffer overnight. Material was stained for 1 hour in uranyl acetate (1%), dehydrated and embedded in araldite and examined in thin sections.

Video real-time imaging of artificial membranes during freeze-drying by cryo-electron microscopy

1988 ◽  
Vol 46 ◽  
pp. 16-17
Author(s):  
Alan S. Rudolph ◽  
Ronald R. Price
Keyword(s):  
Real Time ◽  
Self Assembly ◽  
Freeze Drying ◽  
Video Capture ◽  
Drying Process ◽  
Artificial Membranes ◽  
The Past ◽  
Cryo Electron Microscopy ◽  
Spherical Structures ◽  
Capture Techniques

We have employed cryoelectron microscopy to visualize events that occur during the freeze-drying of artificial membranes by employing real time video capture techniques. Artificial membranes or liposomes which are spherical structures within internal aqueous space are stabilized by water which provides the driving force for spontaneous self-assembly of these structures. Previous assays of damage to these structures which are induced by freeze drying reveal that the two principal deleterious events that occur are 1) fusion of liposomes and 2) leakage of contents trapped within the liposome [1]. In the past the only way to access these events was to examine the liposomes following the dehydration event. This technique allows the event to be monitored in real time as the liposomes destabilize and as water is sublimed at cryo temperatures in the vacuum of the microscope. The method by which liposomes are compromised by freeze-drying are largely unknown. This technique has shown that cryo-protectants such as glycerol and carbohydrates are able to maintain liposomal structure throughout the drying process.

Biomimetic materials: An introduction

1992 ◽  
Vol 50 (2) ◽  
pp. 1020-1021 ◽  
Author(s):  
M. Sarikaya ◽  
J. T. Staley ◽  
I. A. Aksay
Keyword(s):  
Self Assembly ◽  
Structural Control ◽  
Hierarchical Structures ◽  
Ceramic Composites ◽  
Advanced Materials ◽  
Length Scale ◽  
Spider Webs ◽  
Biomimetic Materials ◽  
Synthetic Materials ◽  
All Ceramic

Biomimetics is an area of research in which the analysis of structures and functions of natural materials provide a source of inspiration for design and processing concepts for novel synthetic materials. Through biomimetics, it may be possible to establish structural control on a continuous length scale, resulting in superior structures able to withstand the requirements placed upon advanced materials. It is well recognized that biological systems efficiently produce complex and hierarchical structures on the molecular, micrometer, and macro scales with unique properties, and with greater structural control than is possible with synthetic materials. The dynamism of these systems allows the collection and transport of constituents; the nucleation, configuration, and growth of new structures by self-assembly; and the repair and replacement of old and damaged components. These materials include all-organic components such as spider webs and insect cuticles (Fig. 1); inorganic-organic composites, such as seashells (Fig. 2) and bones; all-ceramic composites, such as sea urchin teeth, spines, and other skeletal units (Fig. 3); and inorganic ultrafine magnetic and semiconducting particles produced by bacteria and algae, respectively (Fig. 4).

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