Roles of chemistry modification for laser textured metal alloys to achieve extreme surface wetting behaviors

Nanostructured and Oriented Metal-Organic Framework Films enabling Extreme Surface Wetting Properties

10.26434/chemrxiv.8191265.v2 ◽

2019 ◽

Author(s):

Andre Mähringer ◽

Julian Rotter ◽

Dana D. Medina

Keyword(s):

Metal Organic Framework ◽

Extreme Temperature ◽

Contact Angles ◽

Surface Wetting ◽

Extreme Surface ◽

Wetting Properties ◽

Glass Substrates ◽

Tilted Surface ◽

Metal Organic ◽

Organic Framework

Herein, we report on the synthesis of highly oriented and nanostructured metal-organic framework (MOF) films featuring extreme surface wetting properties. The Ni- and Co- derivatives of the metal-catecholate series (M-CAT-1) were synthesized as highly crystalline bulk materials and thin films. Oriented pillar-like nanostructured M-CAT-1 films exhibiting pronounced needlelike morphology on gold substrates were established by incorporating a crystallization promoter into the film synthesis. These nanostructured M-CAT-1 MOF films feature extreme wetting phenomena, specifically superhydrophilic and underwater superoleophobic properties with water and underwater oil-contact angles of 0º and up to 174º, respectively. Self-cleaning capabilities for the nanostructured, needle-like M-CAT-1 films were illustrated by measuring time-dependent oil droplet rolling-off a tilted surface. The deposition of the nanostructured Ni-CAT-1 on large glass substrates allowed for the realization of an efficient transparent anti-fog coating enabling a clear view even at extreme temperature gaps up to ca. 120 ºC. This work illustrates the strong link between MOF film morphology and induced surface properties based on these framework materials.

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Nanostructured and oriented metal–organic framework films enabling extreme surface wetting properties

Beilstein Journal of Nanotechnology ◽

10.3762/bjnano.10.196 ◽

2019 ◽

Vol 10 ◽

pp. 1994-2003 ◽

Cited By ~ 2

Author(s):

Andre Mähringer ◽

Julian M Rotter ◽

Dana D Medina

Keyword(s):

Metal Organic Framework ◽

Extreme Temperature ◽

Contact Angles ◽

Surface Wetting ◽

Extreme Surface ◽

Framework Materials ◽

Wetting Properties ◽

Tilted Surface ◽

Metal Organic ◽

Organic Framework

We report on the synthesis of highly oriented and nanostructured metal–organic framework (MOF) films featuring extreme surface wetting properties. The Ni- and Co- derivatives of the metal–catecholate series (M-CAT-1) were synthesized as highly crystalline bulk materials and thin films. Oriented pillar-like nanostructured M-CAT-1 films exhibiting pronounced needle-like morphology on gold substrates were established by incorporating a crystallization promoter into the film synthesis. These nanostructured M-CAT-1 MOF films feature extreme wetting phenomena, specifically superhydrophilic and underwater superoleophobic properties with water and underwater oil-contact angles of 0° and up to 174°, respectively. The self-cleaning capability of the nanostructured, needle-like M-CAT-1 films was illustrated by measuring time-dependent oil droplet rolling-off a tilted surface. The deposition of the nanostructured Ni-CAT-1 film on a large glass substrate allowed for the realization of an efficient, transparent, antifog coating, enabling a clear view even at extreme temperature gaps up to ≈120 °C. This work illustrates the strong link between MOF film morphology and surface properties based on these framework materials.

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Investigating and biomimicking the surface wetting behaviors of ginkgo leaf

Soft Matter ◽

10.1039/c4sm01844c ◽

2014 ◽

Vol 10 (44) ◽

pp. 8800-8803 ◽

Cited By ~ 15

Author(s):

Shuaijun Pan ◽

Rui Guo ◽

Weijian Xu

Keyword(s):

Surface Wetting ◽

Wetting Behaviors ◽

Ginkgo Leaf

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Surface Wetting and Energy Properties of Cellulose Acetate, Polyester and Polypropylene Fibers

International Nonwovens Journal ◽

10.1177/1558925099os-800119 ◽

1999 ◽

Vol os-8 (1) ◽

pp. 1558925099OS-80

Author(s):

Bhupender S. Gupta ◽

Hyun Suk Whang

Keyword(s):

Cellulose Acetate ◽

Contact Angles ◽

Work Of Adhesion ◽

Surface Wetting ◽

Cross Sectional ◽

Fiber Size ◽

Receding Contact ◽

Sectional Shape ◽

Wetting Behaviors ◽

Wetting Force

Using a dynamic wetting force device, involving a sensitive Wilhelmy balance, surface wetting behaviors of polyester, polypropylene, and cellulose acetate fibers, the last two in several different sizes and cross-sectional shapes, were examined. Assessed were the values of the advancing and the receding contact angles and the work of adhesion with water as the fluid. Conducting tests with deionized water and methylene iodide allowed us to assess the value of the total surface energy along with the values of the polar and the dispersion components of it. In a limited number of tests, the surface properties of polyester and polypropylene films were also determined and compared with those of the fibers. The results generally showed that the energy was largely dispersive, hysteresis in contact angles was low, and while the fiber size and cross-sectional shape did not influence the contact angles or the energy, the surface roughness and crystallinity played significant roles.

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Nanostructured and Oriented Metal-Organic Framework Films enabling Extreme Surface Wetting Properties

10.26434/chemrxiv.8191265 ◽

2019 ◽

Author(s):

Andre Mähringer ◽

Julian Rotter ◽

Dana D. Medina

Keyword(s):

Metal Organic Framework ◽

Extreme Temperature ◽

Contact Angles ◽

Surface Wetting ◽

Extreme Surface ◽

Wetting Properties ◽

Glass Substrates ◽

Tilted Surface ◽

Metal Organic ◽

Organic Framework

Herein, we report on the synthesis of highly oriented and nanostructured metal-organic framework (MOF) films featuring extreme surface wetting properties. The Ni- and Co- derivatives of the metal-catecholate series (M-CAT-1) were synthesized as highly crystalline bulk materials and thin films. Oriented pillar-like nanostructured M-CAT-1 films exhibiting pronounced needlelike morphology on gold substrates were established by incorporating a crystallization promoter into the film synthesis. These nanostructured M-CAT-1 MOF films feature extreme wetting phenomena, specifically superhydrophilic and underwater superoleophobic properties with water and underwater oil-contact angles of 0º and up to 174º, respectively. Self-cleaning capabilities for the nanostructured, needle-like M-CAT-1 films were illustrated by measuring time-dependent oil droplet rolling-off a tilted surface. The deposition of the nanostructured Ni-CAT-1 on large glass substrates allowed for the realization of an efficient transparent anti-fog coating enabling a clear view even at extreme temperature gaps up to ca. 120 ºC. This work illustrates the strong link between MOF film morphology and induced surface properties based on these framework materials.

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Nanostructured and Oriented Metal-Organic Framework Films enabling Extreme Surface Wetting Properties

10.26434/chemrxiv.8191265.v1 ◽

2019 ◽

Author(s):

Andre Mähringer ◽

Julian Rotter ◽

Dana D. Medina

Keyword(s):

Metal Organic Framework ◽

Extreme Temperature ◽

Contact Angles ◽

Surface Wetting ◽

Extreme Surface ◽

Wetting Properties ◽

Glass Substrates ◽

Tilted Surface ◽

Metal Organic ◽

Organic Framework

Herein, we report on the synthesis of highly oriented and nanostructured metal-organic framework (MOF) films featuring extreme surface wetting properties. The Ni- and Co- derivatives of the metal-catecholate series (M-CAT-1) were synthesized as highly crystalline bulk materials and thin films. Oriented pillar-like nanostructured M-CAT-1 films exhibiting pronounced needlelike morphology on gold substrates were established by incorporating a crystallization promoter into the film synthesis. These nanostructured M-CAT-1 MOF films feature extreme wetting phenomena, specifically superhydrophilic and underwater superoleophobic properties with water and underwater oil-contact angles of 0º and up to 174º, respectively. Self-cleaning capabilities for the nanostructured, needle-like M-CAT-1 films were illustrated by measuring time-dependent oil droplet rolling-off a tilted surface. The deposition of the nanostructured Ni-CAT-1 on large glass substrates allowed for the realization of an efficient transparent anti-fog coating enabling a clear view even at extreme temperature gaps up to ca. 120 ºC. This work illustrates the strong link between MOF film morphology and induced surface properties based on these framework materials.

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Specimen Preparation of Near Surface Ion Irradiated Samples

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100117820 ◽

1985 ◽

Vol 43 ◽

pp. 170-171

Author(s):

K. F. Russell ◽

L. L. Horton

Keyword(s):

Radiation Damage ◽

Heavy Ions ◽

Target Material ◽

Metal Alloys ◽

Specimen Surface ◽

Specimen Preparation ◽

Particle Accelerators ◽

Near Surface ◽

Graaff Accelerator ◽

Van De Graaff

Beams of heavy ions from particle accelerators are used to produce radiation damage in metal alloys. The damaged layer extends several microns below the surface of the specimen with the maximum damage and depth dependent upon the energy of the ions, type of ions, and target material. Using 4 MeV heavy ions from a Van de Graaff accelerator causes peak damage approximately 1 μm below the specimen surface. To study this area, it is necessary to remove a thickness of approximately 1 μm of damaged metal from the surface (referred to as “sectioning“) and to electropolish this region to electron transparency from the unirradiated surface (referred to as “backthinning“). We have developed electropolishing techniques to obtain electron transparent regions at any depth below the surface of a standard TEM disk. These techniques may be applied wherever TEM information is needed at a specific subsurface position.

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