The Rheological and Structural Properties of Fmoc-Peptide-Based Hydrogels: The Effect of Aromatic Molecular Architecture on Self-Assembly and Physical Characteristics

Langmuir ◽  
2012 ◽  
Vol 28 (4) ◽  
pp. 2015-2022 ◽  
Author(s):  
Ron Orbach ◽  
Iris Mironi-Harpaz ◽  
Lihi Adler-Abramovich ◽  
Estelle Mossou ◽  
Edward P. Mitchell ◽  
...  
Keyword(s):  
Structural Properties ◽  
Self Assembly ◽  
Physical Characteristics ◽  
Molecular Architecture

scholarly journals DNA-Guided Assembly for Fibril Proteins

Mathematics ◽  
2021 ◽  
Vol 9 (4) ◽  
pp. 404
Author(s):  
Alexandru Amărioarei ◽  
Frankie Spencer ◽  
Gefry Barad ◽  
Ana-Maria Gheorghe ◽  
Corina Iţcuş ◽  
...  
Keyword(s):  
Computational Model ◽  
Structural Properties ◽  
Self Assembly ◽  
Structural Characteristics ◽  
Computational Modelling ◽  
Shape Reconstruction ◽  
Raw Material ◽  
Dna Assembly ◽  
Mesh Structure ◽  
Elementary Fibril

Current advances in computational modelling and simulation have led to the inclusion of computer scientists as partners in the process of engineering of new nanomaterials and nanodevices. This trend is now, more than ever, visible in the field of deoxyribonucleic acid (DNA)-based nanotechnology, as DNA’s intrinsic principle of self-assembly has been proven to be highly algorithmic and programmable. As a raw material, DNA is a rather unremarkable fabric. However, as a way to achieve patterns, dynamic behavior, or nano-shape reconstruction, DNA has been proven to be one of the most functional nanomaterials. It would thus be of great potential to pair up DNA’s highly functional assembly characteristics with the mechanic properties of other well-known bio-nanomaterials, such as graphene, cellulos, or fibroin. In the current study, we perform projections regarding the structural properties of a fibril mesh (or filter) for which assembly would be guided by the controlled aggregation of DNA scaffold subunits. The formation of such a 2D fibril mesh structure is ensured by the mechanistic assembly properties borrowed from the DNA assembly apparatus. For generating inexpensive pre-experimental assessments regarding the efficiency of various assembly strategies, we introduced in this study a computational model for the simulation of fibril mesh assembly dynamical systems. Our approach was based on providing solutions towards two main circumstances. First, we created a functional computational model that is restrictive enough to be able to numerically simulate the controlled aggregation of up to 1000s of elementary fibril elements yet rich enough to provide actionable insides on the structural characteristics for the generated assembly. Second, we used the provided numerical model in order to generate projections regarding effective ways of manipulating one of the the key structural properties of such generated filters, namely the average size of the openings (gaps) within these meshes, also known as the filter’s aperture. This work is a continuation of Amarioarei et al., 2018, where a preliminary version of this research was discussed.

scholarly journals Luminescent Supramolecular Nano- or Microstructures Formed in Aqueous Media by Amphiphile-Noble Metal Complexes

2020 ◽  
Vol 2020 ◽  
pp. 1-24 ◽  
Author(s):  
Carmen Cretu ◽  
Loredana Maiuolo ◽  
Domenico Lombardo ◽  
Elisabeta I. Szerb ◽  
Pietro Calandra
Keyword(s):  
Noble Metal ◽  
Smart Materials ◽  
Self Assembly ◽  
Noble Metals ◽  
Photophysical Properties ◽  
Aqueous Media ◽  
Molecular Architecture ◽  
Stimuli Responsive ◽  
Panoramic View ◽  
Amphiphilic Molecules

The involvement of metal ions within the self-assembly spontaneously occurring in surfactant-based systems gives additional and interesting features. The electronic states of the metal, together with the bonds that can be established with the organic amphiphilic counterpart, are the factors triggering new photophysical properties. Moreover, the availability of stimuli-responsive supramolecular amphiphile assemblies, able to disassemble in a back-process, provides reversible switching particularly useful in novel approaches and applications giving rise to truly smart materials. In particular, small amphiphiles with an inner distribution, within their molecular architecture, of various polar and apolar functional groups, can give a wide variety of interactions and therefore enriched self-assemblies. If it is joined with the opportune presence and localization of noble metals, whose chemical and photophysical properties are undiscussed, then very interesting materials can be obtained. In this minireview, the basic concepts on self-assembly of small amphiphilic molecules with noble metals are shown with particular reference to the photophysical properties aiming at furnishing to the reader a panoramic view of these exciting problematics. In this respect, the following will be shown: (i) the principles of self-assembly of amphiphiles that involve noble metals, (ii) examples of amphiphiles and amphiphile-noble metal systems as representatives of systems with enhanced photophysical properties, and (iii) final comments and perspectives with some examples of modern applications.

scholarly journals Azobenzene moiety variation directing self-assembly and photoresponsive behavior of azo-surfactants

2014 ◽  
Vol 2 (39) ◽  
pp. 8303-8312 ◽  
Author(s):  
Shuhua Peng ◽  
Qipeng Guo ◽  
Patrick G. Hartley ◽  
Timothy C. Hughes
Keyword(s):  
Self Assembly ◽  
Alkyl Chain ◽  
Molecular Architecture ◽  
Azobenzene Moiety

We report two photoresponsive amphiphiles with comparable structures consisting of hydrophilic oligooxyethylene units, a hydrophobic alkyl chain and a light-sensitive azobenzene moiety, demonstrating that self-assembly and photoresponsive behaviour is extremely sensitive to the position of the photoactive moiety within the surfactant molecular architecture.

Control of the Mesoscopic Organization of Conjugated Thiophene Oligomers, Induced by Self-Assembly Properties

1993 ◽  
Vol 328 ◽  
Author(s):  
Francis Garnier ◽  
A. Yassar ◽  
R. Hajlaoui ◽  
G. Horowitz ◽  
F. Deloffre
Keyword(s):  
Structural Properties ◽  
Organic Semiconductors ◽  
Self Assembly ◽  
Field Effect Transistors ◽  
Charge Carrier Mobility ◽  
Molecular Engineering ◽  
Molecular Organization ◽  
Conjugated Oligomers ◽  
Planar Molecules ◽  
Mesoscopic Level

ABSTRACTConjugated oligomers form a fascinating class of molecular semiconductors, which open the perspective of control of electronic and structural properties through the variation of their chemical structure. For analysing the correlation between charge transport and structural properties, sexithiophene, 6T, was substituted by hexyl groups, both on the terminal α positions (α,ωDH6T) and as pendant groups in β position (β,β′DH6T). Structural characterizations by X-ray diffraction show that vacuum evaporated thin films of 6T and α,ωDH6T consist of layered structure in a monoclinic arrangement, with all-planar Molecules standing on the substrate, and that a much longer range ordering is observed when passing from 6T to α,ωDH6T, evidencing a large increase of molecular organization at the mesoscopic level. Electrical characterizations also indicate a significant enhancement of anisotropy of conductivity, with a ratio of 120 in favor of the conductivity along the stacking axis for α,ωDH6T. The charge carrier mobility, measured on field-effect transistors fabricated from these conjugated oligomers, also shows a large increase by a factor of 25 when passing from 6T to α,ωDH6T, and reaches a value close to 10-1cm2V-1s-1. In contrast, ββ′DH6T presents very low conductivity and mobility. These observations are attributed to the self-assembly properties brought by alkyl groups in α,ω position, and confirm the large potential of molecular engineering of organic semiconductors.

Molecular Architecture via Coordination:  Self-Assembly of Nanoscale Hexagonal Metallodendrimers with Designed Building Blocks

2006 ◽  
Vol 128 (31) ◽  
pp. 10014-10015 ◽  
Author(s):  
Hai-Bo Yang ◽  
Neeladri Das ◽  
Feihe Huang ◽  
Adam M. Hawkridge ◽  
David C. Muddiman ◽  
...  
Keyword(s):  
Self Assembly ◽  
Building Blocks ◽  
Molecular Architecture

Effect of Molecular Architecture on the Self-Assembly of Bottlebrush Copolymers

2020 ◽  
Vol 124 (50) ◽  
pp. 11519-11529
Author(s):  
Karim R. Gadelrab ◽  
Alfredo Alexander-Katz
Keyword(s):  
Self Assembly ◽  
The Self ◽  
Molecular Architecture
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