Pressure-dependent topographic evolutions of cold-sintered zinc oxide surfaces

AFM force spectroscopy detected trends of interaction strengths, between different chemical groups and different ZnO facets, which reflect various interaction modes of adsorbed species on the catalyst that result in different reaction intermediates.

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Corrosion Protection Study of Carbon Steel and 316 Stainless Steel Alloys Coated by Nanoparticles

Baghdad Science Journal ◽

10.21123/bsj.11.1.116-122 ◽

2014 ◽

Vol 11 (1) ◽

pp. 116-122

Author(s):

Baghdad Science Journal

Keyword(s):

Stainless Steel ◽

Zinc Oxide ◽

Carbon Steel ◽

Atomic Force Microscope ◽

Corrosion Protection ◽

Saline Water ◽

Steel Alloys ◽

Protection Efficiency ◽

316 Stainless Steel ◽

Atomic Force

The Corrosion protection effectiveness of Alimina(Al2O3,50nm)and Zinc oxide (ZnO,30nm) nanoparticales were studied on carbon steel and 316 stainless steel alloys in saline water (3.5%NaCl)at four temperatures: (20,30,40,50 OC)using three electrodes potentiostat. An average corrosion protection efficiencies of 65 %and 80% was achieved using Al2O3 NP's on carbon steel and stainless steel samples respectively, and it seems that no effect of rising temperature on the performances of the coated layers. While ZnO NP'S showed protection efficiency around 65% for the two alloys and little effected by temperature rising on the performanes of the coated layers. The morphology of the coated spesiemses was examined by Atomic force microscope.

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Nanoscale Surface Patterning

MRS Proceedings ◽

10.1557/proc-776-q8.19 ◽

2003 ◽

Vol 776 ◽

Author(s):

Meng Yu ◽

Albena Ivanisevic

Keyword(s):

Atomic Force Microscope ◽

Silicon Oxide ◽

Microcontact Printing ◽

Surface Patterning ◽

Oxide Surfaces ◽

Atomic Force ◽

Diallyldimethylammonium Chloride ◽

Surface Patterns ◽

And Control ◽

Polymer Packing

AbstractWe present a methodology based on Dip-Pen Nanolithography 1 to fabricate nanoscale surface patterns composed of polyelectrolytes. Two widely used polymers Poly(diallyldimethylammonium chloride) (PDDA) and Poly(sodium 4-styrenesulfonate) PSS were chosen as the DPN “inks”. Patterns were created and evaluated on silicon oxide surfaces using an Atomic Force Microscope (AFM). To compare the polymer packing and the height of the nanopatterns, additional fabrication was performed using microcontact printing. We were able to generate structures with better polymer packing using DPN and control the height of the polymer structures more reproducibly compared to microcontact printing.

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Manipulation of defects on oxide surfaces via barrier reduction induced by atomic force microscope tips

Physical Review B ◽

10.1103/physrevb.73.245435 ◽

2006 ◽

Vol 73 (24) ◽

Cited By ~ 28

Author(s):

Mathew B. Watkins ◽

Alexander L. Shluger

Keyword(s):

Atomic Force Microscope ◽

Oxide Surfaces ◽

Atomic Force

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Effects on Morphology Change on the Mg-Doped Zinc-Oxide Surface Measured by Changing the AFM Feedback Speed

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.275-277.2357 ◽

2013 ◽

Vol 275-277 ◽

pp. 2357-2362

Author(s):

Zhe Fan ◽

Dong Qing Yuan ◽

Xiao Ping Ma ◽

Yan Huang ◽

Zhen Zhou

Keyword(s):

Zinc Oxide ◽

Surface Morphology ◽

Atomic Force Microscope ◽

Measuring Method ◽

Oxide Surface ◽

Contact Mode ◽

Zinc Oxide Films ◽

Atomic Force ◽

Definition Of ◽

Mg Doped

Use Atomic Force Microscope to analyze surface morphology of the laboratory prepared Mg-doped zinc oxide films and standard gratings. Main measuring method is the use of semi-contact mode of the Atomic Force Microscope (tapping mode). When parameters such as frequencies and gains do not change, we focus on the differences of the results under different feedback speed (FB) working on the specimens, and sum up the relations between the feedback speed (FB) and the definition of the surface morphology of the specimens.

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Characterization of photosystem II with the atomic-force microscope

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100130365 ◽

1992 ◽

Vol 50 (2) ◽

pp. 1146-1147

Author(s):

Kathleen M. Marr ◽

Mary K. Lyon

Keyword(s):

Photosystem Ii ◽

Atomic Force Microscope ◽

Three Dimensional ◽

Biologically Active ◽

Atomic Force ◽

Freeze Etching ◽

Image Averaging ◽

Oxygen Evolving ◽

Averaging Techniques

Photosystem II (PSII) is different from all other reaction centers in that it splits water to evolve oxygen and hydrogen ions. This unique ability to evolve oxygen is partly due to three oxygen evolving polypeptides (OEPs) associated with the PSII complex. Freeze etching on grana derived insideout membranes revealed that the OEPs contribute to the observed tetrameric nature of the PSIl particle; when the OEPs are removed, a distinct dimer emerges. Thus, the surface of the PSII complex changes dramatically upon removal of these polypeptides. The atomic force microscope (AFM) is ideal for examining surface topography. The instrument provides a topographical view of individual PSII complexes, giving relatively high resolution three-dimensional information without image averaging techniques. In addition, the use of a fluid cell allows a biologically active sample to be maintained under fully hydrated and physiologically buffered conditions. The OEPs associated with PSII may be sequentially removed, thereby changing the surface of the complex by one polypeptide at a time.

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Imaging polymers, proteins and dna in aqueous solutions with the atomic force microscope

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100152136 ◽

1989 ◽

Vol 47 ◽

pp. 32-33

Author(s):

S.A.C. Gould ◽

B. Drake ◽

C.B. Prater ◽

A.L. Weisenhorn ◽

S.M. Lindsay ◽

...

Keyword(s):

Amino Acids ◽

Dna Sequencing ◽

Aqueous Solutions ◽

Atomic Force Microscope ◽

Piezoelectric Crystal ◽

Atomic Force ◽

Structure Of Molecules ◽

Optical Lever

The atomic force microscope (AFM) is an instrument that can be used to image many samples of interest in biology and medicine. Images of polymerized amino acids, polyalanine and polyphenylalanine demonstrate the potential of the AFM for revealing the structure of molecules. Images of the protein fibrinogen which agree with TEM images demonstrate that the AFM can provide topographical data on larger molecules. Finally, images of DNA suggest the AFM may soon provide an easier and faster technique for DNA sequencing.The AFM consists of a microfabricated SiO2 triangular shaped cantilever with a diamond tip affixed at the elbow to act as a probe. The sample is mounted on a electronically driven piezoelectric crystal. It is then placed in contact with the tip and scanned. The topography of the surface causes minute deflections in the 100 μm long cantilever which are detected using an optical lever.

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The atomic-force microscope and its future in biology

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100149350 ◽

1993 ◽

Vol 51 ◽

pp. 704-705

Author(s):

Jean-Paul Revel

Keyword(s):

Silicon Nitride ◽

Laser Beam ◽

Atomic Force Microscope ◽

Scanning Tunneling Microscope ◽

Point Of View ◽

Scanning Tunneling ◽

Close Relative ◽

Tunneling Microscope ◽

Atomic Force ◽

Sharp Point

The last few years have been marked by a series of remarkable developments in microscopy. Perhaps the most amazing of these is the growth of microscopies which use devices where the place of the lens has been taken by probes, which record information about the sample and display it in a spatial from the point of view of the context. From the point of view of the biologist one of the most promising of these microscopies without lenses is the scanned force microscope, aka atomic force microscope.This instrument was invented by Binnig, Quate and Gerber and is a close relative of the scanning tunneling microscope. Today's AFMs consist of a cantilever which bears a sharp point at its end. Often this is a silicon nitride pyramid, but there are many variations, the object of which is to make the tip sharper. A laser beam is directed at the back of the cantilever and is reflected into a split, or quadrant photodiode.

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