scholarly journals Bistable self-assembly in homogeneous colloidal systems for flexible modular architectures

Soft Matter ◽  
2016 ◽  
Vol 12 (10) ◽  
pp. 2737-2743 ◽  
Author(s):  
G. Steinbach ◽  
D. Nissen ◽  
M. Albrecht ◽  
E. V. Novak ◽  
P. A. Sánchez ◽  
...  
Keyword(s):  
Self Assembly ◽  
Colloidal Systems ◽  
Modular Architectures

Deployment strategy for controlled morphologies in sessile, mixed colloidal droplets

RSC Advances ◽  
2015 ◽  
Vol 5 (109) ◽  
pp. 89586-89593 ◽  
Author(s):  
Prasenjit Kabi ◽  
Saptarshi Basu ◽  
Swetaprovo Chaudhuri
Keyword(s):  
Self Assembly ◽  
Effective Medium ◽  
Complex Structures ◽  
Colloidal Systems ◽  
Deployment Strategy

Deployment order and self assembly of colloidal systems offer an effective medium to micro-engineer complex structures without involving sophisticated fabrication procedures.

scholarly journals Multivalency Pattern Recognition to Sort Colloidal Assemblies

2020 ◽  
Author(s):  
Sebastian Loescher ◽  
Andreas Walther
Keyword(s):  
Pattern Recognition ◽  
Self Assembly ◽  
Soft Matter ◽  
Biological Response ◽  
Interaction Patterns ◽  
Colloidal Systems ◽  
Binding Motifs ◽  
Important Principle ◽  
Additional Control ◽  
20 Nm

<i>Multivalent interactions are an important principle for self-assembly, and have been widely used to assemble colloidal systems. However, binding partners on colloids are typically statistically distributed, which falls short of the possibilities arising from geometrically controlled multivalency patterns as for instance found in viruses. Herein, we use the ultimate precision provided by 3D DNA origamis to introduce colloidal scale multivalency pattern recognition via designing geometrically precise interaction patterns at patches of patchy nanocylinder. This gives rise to self-sorting of colloidal assemblies despite having the same type and number of supramolecular binding motifs – solely based on the pattern located on a 20 x 20 nm cross section. The degree of sorting can be modulated by the geometric overlap of patterns and homo, mixed and alternating supracolloidal polymerizations are demonstrated. We demonstrate that geometric positioning of multivalency patterns provides additional control to organize soft matter, and we believe the concept to be of importance for engineering biological response and to be generalizable for other precision nanoparticles and soft matter objects.</i>

High Internal Phase Polymeric Emulsions by Self-Assembly of Colloidal Systems

2003 ◽  
Vol 36 (12) ◽  
pp. 4466-4471 ◽  
Author(s):  
Raffaele Mezzenga ◽  
Janne Ruokolainen ◽  
Glenn H. Fredrickson ◽  
Edward J. Kramer
Keyword(s):  
Self Assembly ◽  
Colloidal Systems ◽  
Internal Phase

scholarly journals Concentration-driven phase transition and self-assembly in drying droplets of diluting whole blood

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Anusuya Pal ◽  
Amalesh Gope ◽  
John D. Obayemi ◽  
Germano S. Iannacchione
Keyword(s):  
Phase Transition ◽  
Self Assembly ◽  
Whole Blood ◽  
Morphological Analysis ◽  
Hierarchical Structures ◽  
Contact Angle Measurement ◽  
Angle Measurement ◽  
Colloidal Systems ◽  
Functional Complexity ◽  
Sharp Phase Transition

Abstract Multi-colloidal systems exhibit a variety of structural and functional complexity owing to their ability to interact amongst different components into self-assembled structures. This paper presents experimental confirmations that reveal an interesting sharp phase transition during the drying state and in the dried film as a function of diluting concentrations ranging from 100% (undiluted whole blood) to 12.5% (diluted concentrations). An additional complementary contact angle measurement exhibits a monotonic decrease with a peak as a function of drying. This peak is related to a change in visco-elasticity that decreases with dilution, and disappears at the dilution concentration for the observed phase transition equivalent to 62% (v/v). This unique behavior is clearly commensurate with the optical image statistics and morphological analysis; and it is driven by the decrease in the interactions between various components within this bio-colloid. The implications of these phenomenal systems may address many open-ended questions of complex hierarchical structures.

scholarly journals The Role of Proteins in Biosilicification

Scientifica ◽  
2012 ◽  
Vol 2012 ◽  
pp. 1-22 ◽  
Author(s):  
Daniel Otzen
Keyword(s):  
Self Assembly ◽  
Organic Matrix ◽  
Specific Protein ◽  
Colloidal Systems ◽  
Protein Properties ◽  
Modified Peptides ◽  
Fundamental Biology ◽  
Living Organisms ◽  
Insight Into

Although the use of silicon dioxide (silica) as a constituent of living organisms is mainly restricted to diatoms and sponges, the ways in which this process is controlled by nature continue to inspire and fascinate. Both diatoms and sponges carry out biosilificiation using an organic matrix but they adopt very different strategies. Diatoms use small and heavily modified peptides called silaffins, where the most characteristic feature is a modulation of charge by attaching long chain polyamines (LCPAs) to lysine groups. Free LCPAs can also cooperate with silaffins. Sponges use the enzyme silicatein which is homologous to the cysteine protease cathepsin. Both classes of proteins form higher-order structures which act both as structural templates and mechanistic catalysts for the polycondensation reaction. In both cases, additional proteins are continuously being discovered which modulate the process further. This paper concentrates on the role of these proteins in the biosilification process as well as in various applications, highlighting areas where focus on specific protein properties may provide further insight. The field of biosilification is a crossroads of different disciplines, where insight into the energetics and mechanisms of molecular self-assembly combine with fundamental biology, complex multicomponent colloidal systems, and an impressive array of potential technological applications.

Terminology for aggregation and self-assembly in polymer science (IUPAC Recommendations 2013)

2012 ◽  
Vol 85 (2) ◽  
pp. 463-492 ◽  
Author(s):  
Richard G. Jones ◽  
Christopher K. Ober ◽  
Philip Hodge ◽  
Pavel Kratochvíl ◽  
Graeme Moad ◽  
...  
Keyword(s):  
Supramolecular Chemistry ◽  
Self Assembly ◽  
Polymer Science ◽  
Colloidal Systems ◽  
The Past ◽  
Different Shapes

In the past, aggregation and self-assembly have been associated principally with micellar and colloidal systems of molecules; however, with the advent of supramolecular chemistry, molecular self-assembly has been opened to a much wider understanding that has facilitated access to a variety of different shapes and sizes, along with the construction of new and fascinating molecular topologies. This document aims at defining more than 150 terms related to aggregation and self-assembly in the particular case of macromolecules. The list is restricted to the most commonly encountered terms.

scholarly journals Computational prediction of an icosahedral quasicrystal

2014 ◽  
Vol 70 (a1) ◽  
pp. C890-C890
Author(s):  
Michael Engel ◽  
Pablo Damasceno ◽  
Carolyn Phillips ◽  
Sharon Glotzer
Keyword(s):  
Self Assembly ◽  
Computational Prediction ◽  
Real Space ◽  
Icosahedral Quasicrystal ◽  
Icosahedral Symmetry ◽  
Structure Model ◽  
Colloidal Systems ◽  
Naturally Occurring ◽  
Higher Dimensional ◽  
Icosahedral Quasicrystals

From the first quasicrystal discovered in the laboratory 30 years ago to the only known specimen of naturally occurring quasicrystals, quasicrystals with icosahedral symmetry have received great attention. There are more than one hundred stable icosahedral quasicrystals in metallic alloys; all are identified by their diffraction spectra. Despite this abundance, resolving the positions of the atoms within the solid has been possible only indirectly. Moreover, unlike dodecagonal and other axial quasicrystals, icosahedral quasicrystals have been observed neither in simulations nor in non-atomic (e.g. micellar or colloidal) systems, where real-space information would be available. Here we present an icosahedral quasicrystal discovered in computer simulation via self-assembly from the liquid phase. We provide a structure model by analyzing atomic surfaces and report the presence of phason flips. Our results constitute a direct microscopic confirmation of the higher-dimensional crystallographic description of icosahedral quasicrystals.

Empty liquid state and self-assembly of high valence non-spherical colloidal systems

Soft Matter ◽  
2013 ◽  
Vol 9 (47) ◽  
pp. 11178 ◽  
Author(s):  
S. Varga ◽  
E. Meneses-Juárez ◽  
G. Odriozola
Keyword(s):  
Self Assembly ◽  
Liquid State ◽  
Colloidal Systems

scholarly journals Multivalency Pattern Recognition to Sort Colloidal Assemblies

2020 ◽  
Author(s):  
Sebastian Loescher ◽  
Andreas Walther
Keyword(s):  
Pattern Recognition ◽  
Self Assembly ◽  
Soft Matter ◽  
Biological Response ◽  
Interaction Patterns ◽  
Colloidal Systems ◽  
Binding Motifs ◽  
Important Principle ◽  
Additional Control ◽  
20 Nm

<i>Multivalent interactions are an important principle for self-assembly, and have been widely used to assemble colloidal systems. However, binding partners on colloids are typically statistically distributed, which falls short of the possibilities arising from geometrically controlled multivalency patterns as for instance found in viruses. Herein, we use the ultimate precision provided by 3D DNA origamis to introduce colloidal scale multivalency pattern recognition via designing geometrically precise interaction patterns at patches of patchy nanocylinder. This gives rise to self-sorting of colloidal assemblies despite having the same type and number of supramolecular binding motifs – solely based on the pattern located on a 20 x 20 nm cross section. The degree of sorting can be modulated by the geometric overlap of patterns and homo, mixed and alternating supracolloidal polymerizations are demonstrated. We demonstrate that geometric positioning of multivalency patterns provides additional control to organize soft matter, and we believe the concept to be of importance for engineering biological response and to be generalizable for other precision nanoparticles and soft matter objects.</i>

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