Molecular routes to the formation of ordered inorganic arrays

1994 ◽  
Vol 52 ◽  
pp. 478-479
Author(s):  
Brigid R. Hey wood ◽  
Caroline German
Keyword(s):  
Self Assembly ◽  
Chemical Properties ◽  
Inorganic Materials ◽  
Inorganic Particles ◽  
Inorganic Solids ◽  
Ordered Assembly ◽  
External Forces ◽  
Physical And Chemical ◽  
Reliable Methods ◽  
And Chemical Properties

Anisotropic inorganic materials are desirable as they possess unique physical and chemical properties resulting from the manner in which the particulate components assemble. The facility to control the ordering of colloidal inorganic particles could presage dramatic improvements in the fabrication of ceramics, catalysts or paints. Biological systems have already harnessed the manifold advantages of such materials, consider shells, teeth, bones etc.(Figures 1 & 2). Synthetic strategies for the formation of nanodimensional inorganic solids abound but there are few reliable methods currently available for directing their subsequent aggregation. Some degree of ordering can be achieved by the application of external forces (magnetic, electrical) but the aggregates readily dissemble once the stimulus is removed. The requirement is, therefore, for an effective molecular route to the ordered assembly and construction of hierarchical inorganic microstructures.The present work forms part of an extended programme of research investigating crystal tectonics, the ordering of nanodimensional inorganic solids. Here, the controlled morphological tailoring of inorganic crystals to yield a form which favours self-assembly has been investigated.

scholarly journals Current Progress in Cross-Linked Peptide Self-Assemblies

2020 ◽  
Vol 21 (20) ◽  
pp. 7577
Author(s):  
Noriyuki Uchida ◽  
Takahiro Muraoka
Keyword(s):  
Self Assembly ◽  
Three Dimensional ◽  
Chemical Properties ◽  
Water Soluble ◽  
Cross Linking ◽  
Physical And Chemical Properties ◽  
Cell Scaffold ◽  
Scaffold Materials ◽  
Physical And Chemical ◽  
And Chemical Properties

Peptide-based fibrous supramolecular assemblies represent an emerging class of biomaterials that can realize various bioactivities and structures. Recently, a variety of peptide fibers with attractive functions have been designed together with the discovery of many peptide-based self-assembly units. Cross-linking of the peptide fibers is a key strategy to improve the functions of these materials. The cross-linking of peptide fibers forming three-dimensional networks in a dispersion can lead to changes in physical and chemical properties. Hydrogelation is a typical change caused by cross-linking, which makes it applicable to biomaterials such as cell scaffold materials. Cross-linking methods, which have been conventionally developed using water-soluble covalent polymers, are also useful in supramolecular peptide fibers. In the case of peptide fibers, unique cross-linking strategies can be designed by taking advantage of the functions of amino acids. This review focuses on the current progress in the design of cross-linked peptide fibers and their applications.

scholarly journals Changes in physical and chemical properties of niosome membrane induced by cholesterol: a promising approach for niosome bilayer intervention

RSC Advances ◽  
2017 ◽  
Vol 7 (78) ◽  
pp. 49463-49472 ◽  
Author(s):  
Mohammad Hadi Nematollahi ◽  
Abbas Pardakhty ◽  
Masoud Torkzadeh-Mahanai ◽  
Mehrnaz Mehrabani ◽  
Gholamreza Asadikaram
Keyword(s):  
Self Assembly ◽  
Nonionic Surfactants ◽  
Chemical Properties ◽  
The Self ◽  
Physical And Chemical Properties ◽  
Physical And Chemical ◽  
And Chemical Properties

Recently, the self-assembly property of nonionic surfactants has been utilized to create vesicles as alternatives to liposomes.

Nano-Delivery Materials: Review of Development and Application in Drug/Gene Transport

2019 ◽  
Vol 803 ◽  
pp. 158-166 ◽  
Author(s):  
Yu Lin Li ◽  
Bin Huan Sun
Keyword(s):  
Mesoporous Silica Nanoparticles ◽  
Chemical Properties ◽  
Inorganic Materials ◽  
Preparation Methods ◽  
Gene Carriers ◽  
Biomedical Diagnosis ◽  
Gene Vectors ◽  
Inorganic Nanomaterials ◽  
Physical And Chemical ◽  
And Chemical Properties

As the nanotechnology rapidly develops, the combination of nanotechnology and biotechnology to build nanoparticles with biological functionalization has brought new opportunities for the development and application of biomedical diagnosis. Many new non-viral drug/gene vectors were constructed by using nanoparticles as drug/gene carriers, especially by making conventional inorganic materials into nanoparticles and performing functional modifications. In this paper, the physical and chemical properties, preparation methods and application in drug/gene transport of several nanomaterials including mesoporous silica nanoparticles, gold nanoparticles, dendrimers, graphene oxide and carbon nanotubes are reviewed respectively. At the same time, the merit and dismerit of different nanocarriers and their application scenarios are compared. It has been found that the excellent biocompatibility and large specific surface area of inorganic nanomaterials have great potential for drug/gene delivery. Although there are many bottlenecks and challenges for nanomaterials to settle during drug delivery development and industrial production, the improvement of inorganic nanomaterials and the development of new nanocarriers can promote the wider progress of nanocarriers in drug/gene transport.

scholarly journals Fabrication of Carboxylmethyl Chitosan Nanocarrier via Self-Assembly for Efficient Delivery of Phenylethyl Resorcinol in B16 Cells

Polymers ◽  
2020 ◽  
Vol 12 (2) ◽  
pp. 408 ◽  
Author(s):  
Pei Zhang ◽  
Huixia Guo ◽  
Chenguang Liu
Keyword(s):  
Drug Delivery ◽  
Cellular Uptake ◽  
Self Assembly ◽  
Chemical Properties ◽  
The Body ◽  
Efficient Delivery ◽  
Mean Size ◽  
Physical And Chemical ◽  
Drug Nanocarriers ◽  
And Chemical Properties

Micro-molecular drugs have special advantages to cope with challenging diseases, however their structure, physical and chemical properties, stability, and pharmacodynamics have more requirements for the way they are delivered into the body. Carrier-based drug delivery systems can circumvent many limited factors of drug delivery and increase their bioavailability. In this context, stable drug nanocarriers of alkaline amino acids (arginine, Arg) modified conjugated linoleic acid-carboxymethyl chitosan (CLA-CMCS) conjugate were developed, which could generate supramolecular micelles to effectively encapsulate the tyrosinase inhibitor phenylethyl resorcinol (PR). The resulting CCA-NPs were spherical nanoparticles with a mean size around 175 nm. The 3-(4,5-dimethyl-2-thiazolyl)-2,5-diphenyl-2-H-tetrazolium bromide (MTT) assay and cellular uptake investigation demonstrated that the CCA-NPs were non-cytotoxic and had excellent cell transport ability. In addition, these CCA-NPs were able to effectively deliver PR and inhibited melanin formation to reduce pigmentation by enhancing cellular uptake. In conclusion, our research indicated that nanocarriers based on self-assembly amphiphilic polymers constituted a promising and effective drug delivery system in hyperpigmentation targeting.

scholarly journals Bioinspired supramolecular nanosheets of zinc chlorophyll assemblies

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
Sunao Shoji ◽  
Tetsuya Ogawa ◽  
Shogo Matsubara ◽  
Hitoshi Tamiaki
Keyword(s):  
Self Assembly ◽  
Chemical Properties ◽  
The Self ◽  
Nano Materials ◽  
Flat Surfaces ◽  
Model Molecule ◽  
Chlorophyll Derivative ◽  
Physical And Chemical ◽  
Antenna Systems ◽  
And Chemical Properties

Abstract Two-dimensional sheet-like supramolecules have attracted much attention from the viewpoints of their potential application as functional (nano)materials due to unique physical and chemical properties. One of the supramolecular sheet-like nanostructures in nature is visible in the self-assemblies of bacteriochlorophyll-c–f pigments inside chlorosomes, which are major components in the antenna systems of photosynthetic green bacteria. Herein, we report artificial chlorosomal supramolecular nanosheets prepared by the self-assembly of a synthetic zinc 31-methoxy-chlorophyll derivative having amide and urea groups in the substituent at the 17-position. The semi-synthetic zinc chlorophyll derivative kinetically formed dimeric species and transformed into more thermodynamically stable chlorosomal J-aggregates in the solid state. The kinetically and thermodynamically formed self-assemblies had particle-like and sheet-like supramolecular nanostructures, respectively. The resulting nanosheets of biomimetic chlorosomal J-aggregates had flat surfaces and well-ordered supramolecular structures. The artificial sheet-like nanomaterial mimicking chlorosomal bacteriochlorophyll-c–f J-aggregates was first constructed by the model molecule, and is potentially useful for various applications including artificial light-harvesting antennas and photosyntheses.

Enhanced photothermal behavior derived from controllable self-assembly of Cu1.94S microstructures

2019 ◽  
Vol 48 (14) ◽  
pp. 4495-4503
Author(s):  
Xiao Shao ◽  
Tianyong Zhang ◽  
Bin Li ◽  
Minghao Zhou ◽  
Xiaoyuan Ma ◽  
...  
Keyword(s):  
Self Assembly ◽  
Chemical Properties ◽  
The Self ◽  
Physical And Chemical Properties ◽  
Assembly Process ◽  
Physical And Chemical ◽  
And Chemical Properties

New ordered architectures or morphologies could be obtained through the self-assembly process and usually generate new physical and chemical properties.

Sugar Coated Semiconductors: Model Surfaces to Study Biological Adhesion

1989 ◽  
Vol 174 ◽  
Author(s):  
Mark Mastandrea ◽  
Mark D. Bednarski
Keyword(s):  
Surface Science ◽  
Self Assembly ◽  
Chemical Properties ◽  
Biological Molecules ◽  
Van Der Waals Interactions ◽  
Biological Adhesion ◽  
Macromolecular Systems ◽  
Fundamental Forces ◽  
Physical And Chemical ◽  
And Chemical Properties

AbstractCertain molecules when placed in contact with a surface can bind to form well-ordered two dimensional arrays. This process is called molecular selfassembly (MSA), and it is emerging as an important method to control the interactions between a surface and its environment (interfacial properties). Molecular self-assembly uses the fundamental forces between molecules (Van der Waals interactions, hydrophobic effects and hydrogen bonding) to form highly ordered macromolecular systems. This process has been used to synthesize molecular films on a variety of surfaces including glass, gold, alumina, platinum, and silicon. The objective of this paper is to describe the application of molecular self-assembled films to the study of biological systems. Specifically, we will describe methods to synthesize and characterize surfaces that contain molecules that bind to bacteria and viruses. We will also evaluate the use of surface science techniques to characterize the physical and chemical properties of these surfaces, and we will attempt to correlate these properties with the adhesion of biological molecules.

Statistical criteria of stellar population types

1966 ◽  
Vol 24 ◽  
pp. 101-110
Author(s):  
W. Iwanowska
Keyword(s):  
Stellar Population ◽  
Chemical Properties ◽  
Spectrophotometric Study ◽  
Physical And Chemical Properties ◽  
Population Type ◽  
The Galaxy ◽  
Distribution Parameters ◽  
Physical And Chemical ◽  
Statistical Criteria ◽  
And Chemical Properties

In connection with the spectrophotometric study of population-type characteristics of various kinds of stars, a statistical analysis of kinematical and distribution parameters of the same stars is performed at the Toruń Observatory. This has a twofold purpose: first, to provide a practical guide in selecting stars for observing programmes, second, to contribute to the understanding of relations existing between the physical and chemical properties of stars and their kinematics and distribution in the Galaxy.

Tailoring microstructures of materials through biomimetics

1993 ◽  
Vol 51 ◽  
pp. 500-501
Author(s):  
Mehmet Sarikaya ◽  
Ilhan A. Aksay
Keyword(s):  
Chemical Properties ◽  
Design And Synthesis ◽  
Structure Sensitive ◽  
Macro Scale ◽  
Methods Of Synthesis ◽  
Successive Level ◽  
Engineering Materials ◽  
Physical And Chemical ◽  
And Chemical Properties ◽  
Synthesis Of Materials

Biomimetics involves investigation of structure, function, and methods of synthesis of biological composite materials. The goal is to apply this information to the design and synthesis of materials for engineering applications.Properties of engineering materials are structure sensitive through the whole spectrum of dimensions from nanometer to macro scale. The goal in designing and processing of technological materials, therefore, is to control microstructural evolution at each of these dimensions so as to achieve predictable physical and chemical properties. Control at each successive level of dimension, however, is a major challenge as is the retention of integrity between successive levels. Engineering materials are rarely fabricated to achieve more than a few of the desired properties and the synthesis techniques usually involve high temperature or low pressure conditions that are energy inefficient and environmentally damaging.In contrast to human-made materials, organisms synthesize composites whose intricate structures are more controlled at each scale and hierarchical order.

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