Dually Reactive Multilayer Coatings Enable Orthogonal Manipulation of Underwater Superoleophobicity and Oil Adhesion via Post-Functionalization

2022 ◽  
Author(s):  
Angana Borbora ◽  
Robert L. Dupont ◽  
Yang Xu ◽  
Xiaoguang Wang ◽  
Uttam Manna
Keyword(s):  
Metal Oxides ◽  
Surface Topography ◽  
Multilayer Coatings ◽  
Fish Scale ◽  
Polymeric Hydrogels ◽  
The Creation ◽  
Underwater Superoleophobicity ◽  
Post Functionalization

Fish scale-inspired underwater superoleophobic coatings with low oil adhesion can be achieved through the creation of hierarchical surface topography on water-compatible materials (including polymeric hydrogels, metal oxides, and electrostatic multilayers)....

Aloe vera mucilage derived highly tolerant underwater superoleophobic coatings

2018 ◽  
Vol 6 (45) ◽  
pp. 22465-22471 ◽  
Author(s):  
Arpita Shome ◽  
Adil Majeed Rather ◽  
Uttam Manna
Keyword(s):  
Michael Addition ◽  
Addition Reaction ◽  
Aloe Vera ◽  
Fish Scale ◽  
Michael Addition Reaction ◽  
Underwater Superoleophobicity

An aloe vera mucilage (AVM) derived highly tolerant and stretchable fish-scale-mimicked coating is introduced by the strategic use of Michael addition reaction. The naturally derived and nature-inspired coating is capable of sustaining various challenging exposures—without compromising the embedded underwater superoleophobicity.

Mussel and fish scale-inspired underwater superoleophobic kapok membranes for continuous and simultaneous removal of insoluble oils and soluble dyes in water

2015 ◽  
Vol 3 (36) ◽  
pp. 18475-18482 ◽  
Author(s):  
Junping Zhang ◽  
Lei Wu ◽  
Yujie Zhang ◽  
Aiqin Wang
Keyword(s):  
High Stability ◽  
Adsorption Properties ◽  
Water Soluble ◽  
Simultaneous Removal ◽  
Fish Scale ◽  
High Adsorption ◽  
Underwater Superoleophobicity

Kapok membranes with excellent underwater superoleophobicity, high adsorption properties for water-soluble dyes, and high stability and flexibility are fabricated.

Characterization of the surface topography and nano-hardness of Cu/Ni multilayer structures

Open Physics ◽  
2011 ◽  
Vol 9 (6) ◽  
Author(s):  
Edyta Kulej ◽  
Barbara Kucharska ◽  
Grzegorz Pyka ◽  
Monika Gwoździk
Keyword(s):  
Mechanical Properties ◽  
Surface Topography ◽  
Multilayer Structure ◽  
Thickness Ratio ◽  
Multilayer Structures ◽  
Multilayer Coatings ◽  
Force Microscopy ◽  
Atomic Force ◽  
Sublayer Thickness

AbstractThis article describes the results of a study of Cu/Ni multilayer coatings applied on a monocrystalline Si(100) silicon substrate by the deposition magnetron sputtering technique. Composed of 100 bilayers each, the multilayers were differentiated by the Ni sublayer thickness (1.2 to 3 nm), while maintaining the constant Cu sublayer thickness (2 nm). The multilayer coatings were characterized by assessing their surface topography using atomic force microscopy and their mechanical properties with nano-hardness measurements by the Berkovich method. The tests showed that the hardness of multilayers was substantially influenced by the thickness ratio of Cu and Ni sublayers and by surface roughness. The highest hardness and, at the same time, the lowest roughness was exhibited by a multilayer structure with a Cu-to-Ni sublayer thickness ratio of 2:1.5.

Hierarchical assembly of smectic liquid crystal defects at undulated interfaces

Soft Matter ◽  
2020 ◽  
Vol 16 (36) ◽  
pp. 8352-8358
Author(s):  
Ryan S. Preusse ◽  
Elizabeth R. George ◽  
S. Ali Aghvami ◽  
Timothy M. Otchy ◽  
Mohamed Amine Gharbi
Keyword(s):  
Liquid Crystal ◽  
Surface Topography ◽  
Crystal Defects ◽  
Hierarchical Assembly ◽  
Smectic A ◽  
Smectic Liquid Crystal ◽  
The Creation ◽  
Effect Of Surface

Effect of surface topography in the creation of disclinations and the assembly of defects in a smectic A liquid crystal.

The role of affect in feelings of obligation

2020 ◽  
Vol 43 ◽  
Author(s):  
Stefen Beeler-Duden ◽  
Meltem Yucel ◽  
Amrisha Vaish
Keyword(s):  
Positive Emotions ◽  
The Creation ◽  
Sense Of Obligation

Abstract Tomasello offers a compelling account of the emergence of humans’ sense of obligation. We suggest that more needs to be said about the role of affect in the creation of obligations. We also argue that positive emotions such as gratitude evolved to encourage individuals to fulfill cooperative obligations without the negative quality that Tomasello proposes is inherent in obligations.

The Broad Applications of the Scanning Electron Microscope

1969 ◽  
Vol 27 ◽  
pp. 20-21
Author(s):  
C. T. Nightingale ◽  
S. E. Summers ◽  
T. P. Turnbull
Keyword(s):  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Light Microscopy ◽  
Surface Topography ◽  
Great Depth ◽  
Resolving Power ◽  
Depth Of Field ◽  
Pictorial Representations ◽  
Scanning Electron

The ease of operation of the scanning electron microscope has insured its wide application in medicine and industry. The micrographs are pictorial representations of surface topography obtained directly from the specimen. The need to replicate is eliminated. The great depth of field and the high resolving power provide far more information than light microscopy.

Effects of Ion Beam Milling on Surface Topography

1973 ◽  
Vol 31 ◽  
pp. 84-85
Author(s):  
P.G. Pawar ◽  
P. Duhamel ◽  
G.W. Monk
Keyword(s):  
Surface Topography ◽  
Ion Beam ◽  
Solid Material ◽  
Beam Current ◽  
Atomic Mass ◽  
Micro Milling ◽  
Ion Milling ◽  
Controlled Atmospheres ◽  
Milling Operations ◽  
Sufficient Energy

A beam of ions of mass greater than a few atomic mass units and with sufficient energy can remove atoms from the surface of a solid material at a useful rate. A system used to achieve this purpose under controlled atmospheres is called an ion miliing machine. An ion milling apparatus presently available as IMMI-III with a IMMIAC was used in this investigation. Unless otherwise stated, all the micro milling operations were done with Ar+ at 6kv using a beam current of 100 μA for each of the two guns, with a specimen tilt of 15° from the horizontal plane.It is fairly well established that ion bombardment of the surface of homogeneous materials can produce surface topography which resembles geological erosional features.

Low-Loss Images in a Stem/Tem Microscope

1976 ◽  
Vol 34 ◽  
pp. 496-497 ◽  
Author(s):  
David C. Joy ◽  
Dennis M. Maher
Keyword(s):  
High Resolution ◽  
Surface Topography ◽  
Beam Direction ◽  
Low Loss ◽  
Specimen Holder ◽  
Glancing Angle ◽  
High Resolution Images ◽  
Set Up ◽  
Conventional Manner ◽  
Objective Type

High-resolution images of the surface topography of solid specimens can be obtained using the low-loss technique of Wells. If the specimen is placed inside a lens of the condenser/objective type, then it has been shown that the lens itself can be used to collect and filter the low-loss electrons. Since the probeforming lenses in TEM instruments fitted with scanning attachments are of this type, low-loss imaging should be possible.High-resolution, low-loss images have been obtained in a JEOL JEM 100B fitted with a scanning attachment and a thermal, fieldemission gun. No modifications were made to the instrument, but a wedge-shaped, specimen holder was made to fit the side-entry, goniometer stage. Thus the specimen is oriented initially at a glancing angle of about 30° to the beam direction. The instrument is set up in the conventional manner for STEM operation with all the lenses, including the projector, excited.

HREM Study of electron-induced surface radiation damage in ReO3

1991 ◽  
Vol 49 ◽  
pp. 636-637
Author(s):  
R. Ai ◽  
H.-J. Fan ◽  
L. D. Marks
Keyword(s):  
Transition Metal ◽  
Metal Ions ◽  
Metal Oxides ◽  
Electron Irradiation ◽  
Transition Metal Oxides ◽  
Carbon Film ◽  
Transition Metal Ions ◽  
Surface Radiation ◽  
Valence Transition ◽  
Electron Microscopes

It has been known for a long time that electron irradiation induces damage in maximal valence transition metal oxides such as TiO2, V2O5, and WO3, of which transition metal ions have an empty d-shell. This type of damage is excited by electronic transition and can be explained by the Knoteck-Feibelman mechanism (K-F mechanism). Although the K-F mechanism predicts that no damage should occur in transition metal oxides of which the transition metal ions have a partially filled d-shell, namely submaximal valence transition metal oxides, our recent study on ReO3 shows that submaximal valence transition metal oxides undergo damage during electron irradiation.ReO3 has a nearly cubic structure and contains a single unit in its cell: a = 3.73 Å, and α = 89°34'. TEM specimens were prepared by depositing dry powders onto a holey carbon film supported on a copper grid. Specimens were examined in Hitachi H-9000 and UHV H-9000 electron microscopes both operated at 300 keV accelerating voltage. The electron beam flux was maintained at about 10 A/cm2 during the observation.

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