Crystal capillary origami capsule with self-assembled nanostructures

Nanoscale ◽  
2021 ◽  
Author(s):  
Kwangseok Park ◽  
Hyoungsoo Kim
Keyword(s):  
Final Structure ◽  
Self Assembling ◽  
Unit Cells ◽  
3D Assembly ◽  
Self Assembled ◽  
New Applications

Self-assembling mechanism of elasto-capillary opens new applications in micro and nanotechnology by providing 3D assembly structures with 2D planar unit cells, so-called capillary origami. To date, the final structure has...

Hierarchical nanostructures self-assembled from δ-MnO2 ultrathin nanosheets and Mn3O4 octahedrons for efficient room-temperature HCHO oxidation

2021 ◽  
Author(s):  
Lifang Qi ◽  
Yao Le ◽  
Chao Wang ◽  
Rui Lei ◽  
Tian Wu
Keyword(s):  
Room Temperature ◽  
Hierarchical Nanostructures ◽  
Low Level ◽  
Ultrathin Nanosheets ◽  
Self Assembling ◽  
Formaldehyde Oxidation ◽  
Self Assembled

Self-assembling ultrathin active δ-MnO2 nanosheets and Mn3O4 octahedrons into hierarchical texture enhances room-temperature formaldehyde oxidation at a low-level of Pt.

scholarly journals Superhydrophilic Coating of Pine Wood by Plasma Functionalization of Self-Assembled Polystyrene Spheres

Coatings ◽  
2021 ◽  
Vol 11 (2) ◽  
pp. 114
Author(s):  
Sebastian Dahle ◽  
John Meuthen ◽  
René Gustus ◽  
Alexandra Prowald ◽  
Wolfgang Viöl ◽  
...  
Keyword(s):  
Dip Coating ◽  
Face Centered Cubic ◽  
Wood Substrate ◽  
Polystyrene Spheres ◽  
Pine Wood ◽  
Self Assembling ◽  
Monodisperse Polystyrene ◽  
Self Assembled ◽  
Face Centered ◽  
Plasma Functionalization

Self-assembling films typically used for colloidal lithography have been applied to pine wood substrates to change the surface wettability. Therefore, monodisperse polystyrene (PS) spheres have been deposited onto a rough pine wood substrate via dip coating. The resulting PS sphere film resembled a polycrystalline face centered cubic (FCC)-like structure with typical domain sizes of 5–15 single spheres. This self-assembled coating was further functionalized via an O2 plasma. This plasma treatment strongly influenced the particle sizes in the outermost layer, and hydroxyl as well as carbonyl groups were introduced to the PS spheres’ surfaces, thus generating a superhydrophilic behavior.

Self-assembled nano-aggregates of fluorinases demonstrate enhanced enzymatic activity, thermostability and reusability

2020 ◽  
Vol 8 (2) ◽  
pp. 648-656
Author(s):  
Chunhao Tu ◽  
Jin Zhou ◽  
Lei Peng ◽  
Shuli Man ◽  
Long Ma
Keyword(s):  
Aqueous Solution ◽  
Enzyme Activity ◽  
Enzymatic Activity ◽  
Self Assembling ◽  
Self Assembled

Three SAP (self-assembling peptide)-tagged fluorinases (FLAs) are successfully prepared. All three SAP-tagged FLAs bear enzymatic activity and they form nano-sized particles in aqueous solution. One of them displays improved enzyme activity, thermostability and reusability.

Self-assembling a natural small molecular inhibitor that shows aggregation-induced emission and potentiates antitumor efficacy

2021 ◽  
Vol 6 (1) ◽  
pp. 33-42
Author(s):  
Xiaona Chen ◽  
Zhen Hu ◽  
Liqian Zhou ◽  
Fu Zhang ◽  
Jianqin Wan ◽  
...  
Keyword(s):  
Antitumor Activity ◽  
Antitumor Efficacy ◽  
Aggregation Induced Emission ◽  
Self Assembling ◽  
Self Assembled ◽  
High Antitumor Activity

Self-assembled dasatinib nanoparticles exhibited aggregation-induced emission with high antitumor activity.

Effects of Substrates on the Self-Assembling of FePt Nanocrystals

2001 ◽  
Vol 674 ◽  
Author(s):  
Min Chen ◽  
David E. Nikles
Keyword(s):  
Chemical Reduction ◽  
Average Diameter ◽  
Iron Pentacarbonyl ◽  
Fept Nanoparticles ◽  
Hexagonal Close Packed ◽  
Self Assembling ◽  
Hydrocarbon Solvents ◽  
Carbon Coated ◽  
Self Assembled ◽  
Hexagonal Arrays

ABSTRACTFe48Pt52 nanoparticles were synthesized by the simultaneous chemical reduction of platinum acetylacetonate and thermal decomposition of iron pentacarbonyl. As-prepared the particles were spherical with an average diameter of 3 nm and a polydispersity of less than 5%. The particles were superparamagnetic and had a fcc structure. Highly ordered self-assembled supercrystals of particles were formed in TEM grids by deposition from dispersions in hydrocarbon solvents. Nanoparticles deposited on amorphous carbon-coated and SiO2-coated Cu grids tend to assemble into small domains of hexagonal arrays. Larger domains of hexagonal arrays formed on Si3N4 membrane TEM grids. For thin multilayers, the FePt nanoparticles tends to assemble into hexagonal close-packed lattices (ABABAB stacking). For the thicker multilayers, ABCABC stacking was observed. Small angle X-ray reflectivity of the particles on a Si (100) substrate show highly ordered multiplanar structure with d-spacing of 6.2 nm. The coercivity of self-assembled FePt films strongly depended on the annealing temperature. After annealing at 700°C for 30 minutes, the particles transformed from FCC to “FCT” phase and the coercivity of film increased up to 11570 Oe. However, the particle size increased to 16 nm due to sintering.

Direct functionalization of self-assembled nanotubes overcomes unfavorable self-assembling processes

2009 ◽  
pp. 3457 ◽  
Author(s):  
Thi-Thanh-Tam Nguyen ◽  
François-Xavier Simon ◽  
Marc Schmutz ◽  
Philippe J. Mésini
Keyword(s):  
Self Assembling ◽  
Direct Functionalization ◽  
Self Assembled

scholarly journals The Origin of Nanoscopic Grooving on Vesicle Walls in Submarine Basaltic Glass: Implications for Nanotechnology

2009 ◽  
Vol 2009 ◽  
pp. 1-14 ◽  
Author(s):  
Jason E. French ◽  
Karlis Muehlenbachs
Keyword(s):  
Integrated Circuits ◽  
North Atlantic Ocean ◽  
Magmatic Fluid ◽  
Driving Mechanism ◽  
Pattern Complexity ◽  
The North ◽  
Self Assembling ◽  
Numerical Predictions ◽  
New Applications ◽  
Ocean Ridge

Dendritic networks of nanoscopic grooves measuring 50–75 nm wide by<50 nm deep occur on the walls of vesicles in the glassy margins of mid-ocean ridge pillow basalts worldwide. Until now, their exact origin and significance have remained unclear. Here we document examples of such grooved patterns on vesicle walls in rocks from beneath the North Atlantic Ocean, and give a fluid mechanical explanation for how they formed. According to this model, individual nanogrooves represent frozen viscous fingers of magmatic fluid that were injected into a thin spheroidal shell of hot glass surrounding each vesicle. The driving mechanism for this process is provided by previous numerical predictions of tangential tensile stress around some vesicles in glassy rocks upon cooling through the glass transition. The self-assembling nature of the dendritic nanogrooves, their small size, and overall complexity in form, are interesting from the standpoint of exploring new applications in the field of nanotechnology. Replicating such structures in the laboratory would compete with state-of-the-art nanolithography techniques, both in terms of pattern complexity and size, which would be useful in the fabrication of a variety of grooved nanodevices. Dendritic nanogrooving inSiO2glass might be employed in the manufacturing of integrated circuits.

scholarly journals Polymeric Organo-Silane Coatings for Aluminum Alloy Corrosion Protection by Self-Assembled Metho

2012 ◽  
Vol 9 (1) ◽  
pp. 435-442 ◽  
Author(s):  
Yabin Wang ◽  
Yanni Li ◽  
Fang Wang
Keyword(s):  
Aluminum Alloy ◽  
Corrosion Protection ◽  
Electrochemical Techniques ◽  
Aluminum Surface ◽  
Corrosion Resistant ◽  
Hot Air ◽  
Self Assembling ◽  
Defective Layer ◽  
Self Assembled ◽  
Aluminum Alloy Surface

The protective performances of coating formed by organo-silane with a linear alkyl chain for promoting aluminum alloy corrosion protection were evaluated by electrochemical techniques. The coatings were self-assembled in the hydrolyzed hydroalcoholic bath ofn-octyltriethoxysilane (OS) and cured at hot air oven by different time. The coatings prepared by the less self-assembled number and shorter cured time, were always porous and scarcely protective. On the contrary, those built by the more self-assembled number and the longer cured time had higher coverage on aluminum surface and favorable corrosion resistant property. The best results were obtained whenn-octyltri-ethoxysilane (OS) was hydrolyzed 25 h, self-assembling of OS was conducted for five times and the multi-layers were cured at 120 for 1∼2 hours. In this case, the thicker, high cross-linked and more scarcely defective layer was formed on aluminum alloy surface.

scholarly journals Chitosan Based Self-assembled Nanoparticles in Drug Delivery

2018 ◽  
Author(s):  
Carlos Peniche ◽  
Hazel Peniche ◽  
Javier Pérez
Keyword(s):  
Drug Delivery ◽  
Chitosan Nanoparticles ◽  
Biological Properties ◽  
Polyelectrolyte Complexes ◽  
Non Invasive ◽  
Self Assembling ◽  
Hydrophobic Moiety ◽  
Specificity And Sensitivity ◽  
Self Assembled ◽  
Routes Of Drug Administration

Chitosan is a cationic polysaccharide usually obtained by alkaline deacetylation of chitin poly(N-acetylglucosamine). It is biocompatible, biodegradable, mucoadhesive and non-toxic. These excellent biological properties make chitosan a good candidate as platform for developing drug delivery systems with improved biodistribution, increased specificity and sensitivity, and reduced pharmacological toxicity. In particular, chitosan nanoparticles have been found appropriate for non-invasive routes of drug administration: oral, nasal, pulmonary and ocular routes. These applications are facilitated by the absorption-enhancing effect of chitosan. Many different procedures have been proposed for obtaining chitosan nanoparticles. Particularly, the introduction of hydrophobic moieties into chitosan molecules by grafting to generate a hydrophobic-hydrophilic balance promoting self-assembling is a current and appealing approach. The grafting agent can be a hydrophobic moiety to form micelles that can entrap lipophilic drugs or it can be the drug itself. Another suitable way to generate self-assembled chitosan nanoparticles is through the formation of polyelectrolyte complexes with polyanions. This paper reviews the main approaches developed for preparing chitosan nanoparticles by self-assembling by both procedures and illustrates the state of the art of their application in drug delivery.

scholarly journals Peptide Nanomaterials for Drug Delivery Applications

2020 ◽  
Vol 21 (4) ◽  
pp. 401-412 ◽  
Author(s):  
Sreekanth Pentlavalli ◽  
Sophie Coulter ◽  
Garry Laverty
Keyword(s):  
Drug Delivery ◽  
Self Assembly ◽  
Diverse Range ◽  
Drug Molecules ◽  
Sustained Drug Delivery ◽  
Self Assembling ◽  
Wide Range ◽  
Methods Of Synthesis ◽  
Self Assembled

Self-assembled peptides have been shown to form well-defined nanostructures which display outstanding characteristics for many biomedical applications and especially in controlled drug delivery. Such biomaterials are becoming increasingly popular due to routine, standardized methods of synthesis, high biocompatibility, biodegradability and ease of upscale. Moreover, one can modify the structure at the molecular level to form various nanostructures with a wide range of applications in the field of medicine. Through environmental modifications such as changes in pH and ionic strength and the introduction of enzymes or light, it is possible to trigger self-assembly and design a host of different self-assembled nanostructures. The resulting nanostructures include nanotubes, nanofibers, hydrogels and nanovesicles which all display a diverse range of physico-chemical and mechanical properties. Depending on their design, peptide self-assembling nanostructures can be manufactured with improved biocompatibility and in vivo stability and the ability to encapsulate drugs with the capacity for sustained drug delivery. These molecules can act as carriers for drug molecules to ferry cargo intracellularly and respond to stimuli changes for both hydrophilic and hydrophobic drugs. This review explores the types of self-assembling nanostructures, the effects of external stimuli on and the mechanisms behind the assembly process, and applications for such technology in drug delivery.

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