Precision stacking of nanoparticle laden sessile droplets to control solute deposit morphology

2015 ◽  
Vol 106 (6) ◽  
pp. 063101 ◽  
Author(s):  
Prasenjit Kabi ◽  
Saptarshi Basu ◽  
Apratim Sanyal ◽  
Swetaprovo Chaudhuri
Keyword(s):  
Deposit Morphology

scholarly journals Epitaxial growth by monolayer restricted galvanic displacement

2012 ◽  
Vol 77 (9) ◽  
pp. 1239-1242
Author(s):  
Rastko Vasilic
Keyword(s):  
Epitaxial Growth ◽  
Deposition Process ◽  
Scanning Tunneling ◽  
Deposit Morphology ◽  
Galvanic Displacement ◽  
Tunneling Microscopy ◽  
Efficient Tool ◽  
Dimensional Growth ◽  
Key Parameter

The development of a new method for epitaxial growth of metals in solution by galvanic displacement of layers pre-deposited by underpotential deposition (UPD) was discussed and experimentally illustrated throughout the lecture. Cyclic voltammetry (CV) and scanning tunneling microscopy (STM) are employed to carry out and monitor a ?quasi-perfect?, two-dimensional growth of Ag on Au(111), Cu on Ag(111), and Cu on Au(111) by repetitive galvanic displacement of underpotentially deposited monolayers. A comparative study emphasizes the displacement stoichiometry as an efficient tool for thickness control during the deposition process and as a key parameter that affects the deposit morphology. The excellent quality of layers deposited by monolayer-restricted galvanic displacement is manifested by a steady UPD voltammetry and ascertained by a flat and uniform surface morphology maintained during the entire growth process.

The electrochemical reduction of PdCl42− and PdCl62− in polyaniline: Influence of Pd deposit morphology on methanol oxidation in alkaline solution

2011 ◽  
Vol 56 (17) ◽  
pp. 6060-6070 ◽  
Author(s):  
David W. Hatchett ◽  
Nicole M. Millick ◽  
John M. Kinyanjui ◽  
Sujitra Pookpanratana ◽  
Marcus Bär ◽  
...  
Keyword(s):  
Electrochemical Reduction ◽  
Methanol Oxidation ◽  
Alkaline Solution ◽  
Deposit Morphology

scholarly journals Diversity in Aβ deposit morphology and secondary proteome insolubility across models of Alzheimer-type amyloidosis

2020 ◽  
Vol 8 (1) ◽  
Author(s):  
Guilian Xu ◽  
Susan E. Fromholt ◽  
Paramita Chakrabarty ◽  
Fanchao Zhu ◽  
Xuefei Liu ◽  
...  
Keyword(s):  
Deposit Morphology ◽  
Alzheimer Type

Large-scale flume modelling of segregation processes in debris flows

2020 ◽  
Author(s):  
Julia Kimball ◽  
W Andrew Take
Keyword(s):  
Debris Flows ◽  
Large Scale ◽  
Multicomponent Mixture ◽  
Granular Flows ◽  
Particle Sizes ◽  
Deposit Morphology ◽  
Multicomponent Mixtures ◽  
Particle Segregation ◽  
Experimental Strategies ◽  
Landslide Deposit

<p>Debris flows are powerful natural hazards posing risk to life, infrastructure, and property.  Understanding the particle scale interactions in these flows is a key component in the development of models to predict the mobility, distal reach, and hazard posed by a given event. In this study we focus on the process of segregation in debris flows, using a large-scale landslide flume to explore segregation in mixtures of 25 mm, 12 mm, 6 mm, and 3 mm diameter particle sizes. Sample volumes, consisting of a multicomponent mixture of materials, up to 1 m<sup>3</sup> in size are released at the top of a 6.8 m long, 2.1 m wide slope, inclined at 30 degrees to the horizontal to initiate flow. Subsequent analysis is completed to determine the extent of vertical and longitudinal segregation of the post-landslide deposit morphology. A range of experimental strategies are explored to provide quantitative measures of particle segregation. Particle size is identified via image analysis and various techniques are applied for the longitudinal sectioning of the deposit, using measurements of segregation at the sidewall of the transparent flume, contrasted with planes measured from within the centre of the deposit. Further, replicate experiments are shown to quantify the probabilistic variation in segregation for multicomponent mixtures of dry granular flows, as well as initially saturated granular flows, to explore the effect of pore fluid on segregation processes.</p>

scholarly journals In situ video-STM studies of the mechanisms and dynamics of electrochemical bismuth nanostructure formation on Au

2016 ◽  
Vol 193 ◽  
pp. 171-185 ◽  
Author(s):  
H. Matsushima ◽  
S.-W. Lin ◽  
S. Morin ◽  
O. M. Magnussen
Keyword(s):  
Scanning Tunneling Microscopy ◽  
Temporal Resolution ◽  
Atomic Resolution ◽  
Scanning Tunneling ◽  
Deposit Morphology ◽  
Tunneling Microscopy ◽  
Atomic Arrangement ◽  
Surface Plane ◽  
Structural Fluctuations

The microscopic mechanisms of Bi electrodeposition on Au(111) and Au(100) electrodes in the overpotential regime were studied by in situ scanning tunneling microscopy with high spatial and temporal resolution. Atomic resolution images of the needle-like Bi(110) deposits formed on Au(111) reveal the central influence of covalent Bi–Bi bonds on the deposit morphology. In the straight steps along the needle edges the Bi atoms are interlinked by these bonds, whereas at the needle tip and at kinks along the needle edges dangling bonds exist, explaining the rapid structural fluctuations at these sites. For ultrathin Bi deposits on Au(100) a more open atomic arrangement was found within the surface plane, which was tentatively assigned to an epitaxially stabilised Bi(111) film. Furthermore, well-defined nanowires, consisting of zigzag chains of Bi surface atoms, were observed on this surface.

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