Role of sulfur in catalyzing fluorine atom fast etching of silicon with smooth surface morphology

2019 ◽  
Vol 37 (6) ◽  
pp. 061303 ◽  
Author(s):  
Priyanka Arora ◽  
Tam Nguyen ◽  
Aseem Chawla ◽  
Sang-Ki Nam ◽  
Vincent M. Donnelly
Keyword(s):  
Surface Morphology ◽  
Fluorine Atom ◽  
Smooth Surface

A Comparative Study of GaN Films Grown on Different Faces of Sapphire by ECR-Assisted MBE

1992 ◽  
Vol 242 ◽  
Author(s):  
T. D. Moustakas ◽  
R. J. Molnar ◽  
T. Lei ◽  
G. Menon ◽  
C. R. Eddy
Keyword(s):  
Surface Morphology ◽  
Low Temperatures ◽  
Smooth Surface ◽  
Growth Process ◽  
X Ray Diffraction ◽  
Epitaxial Relationship ◽  
X Ray ◽  
Sapphire Substrates ◽  
Growth Method ◽  
Step Growth

ABSTRACTGaN films were grown on c-plane (0001), a-plane (1120) and r-plane (1102) sapphire substrates by the ECR-assisted MBE method. The films were grown using a two-step growth process, in which a GaN buffer is grown first at relatively low temperatures and the rest of the film is grown at higher temperatures. RHEED studies indicate that this growth method promotes lateral growth and leads to films with smooth surface morphology. The epitaxial relationship to the substrate, the crystalline quality and the surface morphology were investigated by RHEED, X-ray diffraction and SEM studies.

The Role of Bionic Modifications in Reducing Adhesion and Draft of Agricultural and Earthmoving Machinery

2013 ◽  
Vol 461 ◽  
pp. 553-561
Author(s):  
Rashid Qaisrani ◽  
Jian Qiao Li ◽  
Mohammad Iqbal
Keyword(s):  
Energy Consumption ◽  
Surface Morphology ◽  
Construction Materials ◽  
Force Analysis ◽  
Lubrication Mechanism ◽  
Limited Application ◽  
Practical Field ◽  
Adhesion Friction

Soil adheres to the surfaces of soil engaging components of earthmoving machinery and equipment. It has been pbserved that up to 50% of energy may be consumed in overcoming adhesion and friction of soil to the surfaces of soil engaging components of agricultural and earthmoving machinery. Surface morphology, chemical composition, elasticity, lubrication mechanism and electric osmosis play significant roles in reducing adhesion, friction and energy consumption of various equipment. Some of these techniques have very limited application in the practical field conditions because of the time and amount of fluid required to achieve the desired results. Whereas other techniques are effective in reducing adhesion and friction and improving work quality of these machines and equipment. This paper analyses the forces including the drafts of conventional and bionic bulldozing blades operating under identical conditions using mathematical modelling. The force analysis showed that both adhesion and friction play major role in reducing drafts of earrthmoving machinery. It is also worth stating that both the surface morphology and the construction materials play important role in reducing adhesion and friction of ground eganging components of earthmoving machinery.

Electrochemical Deposition of (Bi,Sb)2Te3 for Thermoelectric Microdevices

2000 ◽  
Vol 626 ◽  
Author(s):  
Jean-Pierre Fleurial ◽  
Jennifer A. Herman ◽  
G. Jeffrey Snyder ◽  
Margaret A. Ryan ◽  
Alexander Borshchevsky ◽  
...  
Keyword(s):  
Surface Morphology ◽  
Electrochemical Deposition ◽  
Smooth Surface ◽  
Room Temperature ◽  
Aqueous Electrolyte ◽  
Experimental Methods ◽  
Thick Photoresist ◽  
P Type ◽  
Nanoporous Templates ◽  
Deposited Films

ABSTRACTNew experimental methods have been developed to electrochemically deposit p-type Sb-rich Bi2-xSbxTe3, Pb-doped and Bi-doped Bi2Te3, and PbTe thick films. Some of the deposited films were dense and had a smooth surface morphology. These films were deposited potentiostatically at room temperature in an acidic aqueous electrolyte. Experimental deposition of Bi2Te3 alloys into various thick nanoporous templates made out of anodized alumina has also been achieved. Miniaturized thermoelements for microdevices (25 μm tall, 60 μm diameter) were grown by plating through thick photoresist templates. The experimental techniques developed, as well as the transport properties of some of the films and filled templates, will be presented.

Modulating the grain size, phase and optoelectronic quality of perovskite films with cesium iodide for high-performance solar cells

2018 ◽  
Vol 6 (29) ◽  
pp. 7880-7889 ◽  
Author(s):  
Siraj Sidhik ◽  
Andrea Cerdán Pasarán ◽  
Christopher Rosiles Pérez ◽  
Tzarara López-Luke ◽  
Elder De la Rosa
Keyword(s):  
Grain Size ◽  
Solar Cells ◽  
High Performance ◽  
Smooth Surface ◽  
Cesium Iodide

The role of cesium in retarding perovskite crystallization for enhanced grain size and ultra-smooth surface giving an efficiency of ∼19%.

Non-noble metal catalysts for transfer hydrogenation of levulinic acid: The role of surface morphology and acid-base pairs

2020 ◽  
Vol 18 ◽  
pp. 100501
Author(s):  
Jinyao Wang ◽  
Jiefeng Liu ◽  
Xiao Yu ◽  
Wenxiang Zhang ◽  
Guangyu Zhang ◽  
...  
Keyword(s):  
Surface Morphology ◽  
Noble Metal ◽  
Levulinic Acid ◽  
Metal Catalysts ◽  
Transfer Hydrogenation ◽  
Acid Base ◽  
Base Pairs ◽  
Noble Metal Catalysts

Surface treatment and its effect on the electrochemical behavior of Ti–15Mo–3Nb–3Al alloy

RSC Advances ◽  
2016 ◽  
Vol 6 (43) ◽  
pp. 36345-36355 ◽  
Author(s):  
R. V. Lakshmi ◽  
Parthasarathi Bera ◽  
Chinnasamy Anandan
Keyword(s):  
Chemical Composition ◽  
Surface Morphology ◽  
Surface Treatment ◽  
Electrochemical Behavior ◽  
Sol Gel

The effect of alkaline and acidic treatments on the surface morphology, chemical composition and electrochemical behavior of Ti β–21S alloy is studied. Also, the role of GPTMS–TIP sol–gel coating in obviating the effects is explored.

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