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

2020 ◽  
Author(s):  
Sebastian Dahle ◽  
John Meuthen ◽  
René Gustus ◽  
Alexandra Prowald ◽  
Wolfgang Viöl ◽  
...  
Keyword(s):  
Dip Coating ◽  
Particle Sizes ◽  
Carbonyl Groups ◽  
Wood Substrate ◽  
Polystyrene Spheres ◽  
Pine Wood ◽  
Self Assembling ◽  
Monodisperse Polystyrene ◽  
Self Assembled ◽  
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 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 behaviour.

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.

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.

Cooperation and competition of hydrogen and halogen bonds in 2D self-assembled nanostructures based on bromine substituted coumarins

2019 ◽  
Vol 43 (44) ◽  
pp. 17182-17187 ◽  
Author(s):  
Bao Zha ◽  
Jinxing Li ◽  
Juntian Wu ◽  
Xinrui Miao ◽  
Min Zhang
Keyword(s):  
Coumarin Derivatives ◽  
Carbonyl Groups ◽  
Halogen Bonds ◽  
Cooperation And Competition ◽  
Self Assembled ◽  
Substituted Coumarins

Three coumarin derivatives (Co16, 6-Br-Co16 and 6,8-Br-Co16) with ester, ether, and carbonyl groups and different numbers of bromine substituents on the coumarin cores were synthesized.

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.

scholarly journals Superhydrophobic Self-Assembled Silane Monolayers on Hierarchical 6082 Aluminum Alloy for Anti-Corrosion Applications

2020 ◽  
Vol 10 (8) ◽  
pp. 2656 ◽  
Author(s):  
Amani Khaskhoussi ◽  
Luigi Calabrese ◽  
Edoardo Proverbio
Keyword(s):  
Aluminum Alloy ◽  
Surface Energy ◽  
High Water ◽  
Dip Coating ◽  
Aluminum Surface ◽  
Sliding Angle ◽  
Water Contact ◽  
Electrochemical Tests ◽  
Self Assembled ◽  
6082 Aluminum Alloy

In this work, a two-stage methodology to design super-hydrophobic surfaces was proposed. The first step consists of creating a rough nano/micro-structure and the second step consists of reducing the surface energy using octadecyltrimethoxysilane. The surface roughening was realized by three different short-term pretreatments: (i) Boiling water, (ii) HNO3/HCl etching, or (iii) HF/HCl etching. Then, the surface energy was reduced by dip-coating in diluted solution of octadecyltrimethoxysilane to allow the formation of self-assembled silane monolayers on a 6082-T6 aluminum alloy surface. Super-hydrophobic aluminum surfaces were investigated by SEM-EDS, FTIR, profilometry, and contact and sliding angles measurements. The resulting surface morphologies by the three approaches were structured by a dual hierarchical nano/micro-roughness. The surface wettability varied with the applied roughening pretreatment. In particular, an extremely high water contact angle (around 180°) and low sliding angle (0°) were evidenced for the HF/HCl-etched silanized surface. The results of electrochemical tests demonstrate a remarkable enhancement of the aluminum alloy corrosion resistance through the proposed superhydrophobic surface modifications. Thus, the obtained results evidenced that the anti-wetting behavior of the aluminum surface can be optimized by coupling an appropriate roughening pretreatment with a self-assembled silane monolayer deposition (to reduce surface energy) for anticorrosion application.

scholarly journals Preparation of Arrays of Isolated Spherical Cavities by Self-Assembly of Polystyrene Spheres on Self-Assembled Pre-patterned Macroporous Films

2004 ◽  
Vol 16 (1) ◽  
pp. 90-93 ◽  
Author(s):  
M. E. Abdelsalam ◽  
P. N. Bartlett ◽  
J. J. Baumberg ◽  
S. Coyle
Keyword(s):  
Self Assembly ◽  
Polystyrene Spheres ◽  
Spherical Cavities ◽  
Self Assembled

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
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