On the Remarkable Role of Surface Topography of the Bottom Electrodes in Blocking Leakage Currents in Molecular Diodes

2014 ◽  
Vol 136 (18) ◽  
pp. 6554-6557 ◽  
Author(s):  
Li Yuan ◽  
Li Jiang ◽  
Damien Thompson ◽  
Christian A. Nijhuis
Keyword(s):  
Surface Topography ◽  
Leakage Currents ◽  
Molecular Diodes

The role of surface topography and normal load in the initiation of ratchetting-peak friction, seizure, scuffing, and elastic shakedown

2021 ◽  
pp. 1-12
Author(s):  
Vimal Edachery ◽  
V. Swamybabu ◽  
Gurupatham Anand ◽  
Paramasamy Manikandan ◽  
Satish V. Kailas
Keyword(s):  
Steady State ◽  
Surface Topography ◽  
Sliding Wear ◽  
Friction And Wear ◽  
Critical Parameter ◽  
Normal Load ◽  
Sliding Direction ◽  
Elastic Shakedown ◽  
Lubrication Conditions

Abstract Surface topography is a critical parameter that can influence friction and wear in engineering applications. In this work, the influence of surface topography directionality on seizure and scuffing initiation during tribological interactions is explored. For this, unidirectional sliding wear experiments were carried out in immersed lubrication conditions for various normal loads. The tribological interactions were studied using EN31-60 HRC flats and SAE52100-60HRC pins in a sphere on flat configuration. The results show that, in some cases, the sliding interactions in the initial cycles lead to a high friction coefficient of up to ∼0.68 in lubricated conditions, which was termed as ‘peak friction’, and this was accompanied by scuffing. The existence of peak friction was found to be dependent on surface topography directionality, especially when the directionality in topography was parallel to the sliding direction. Continuous ratchetting was found to be the cause of peak friction which was accompanied by seizure and scuffing. When the topography directionality was perpendicular or independent of sliding direction, elastic shakedown occurred at earlier cycles and prevented peak friction initiation, scuffing and also facilitated for higher steady-state friction values.

Role of rough surface topography on gas slip flow in microchannels

2012 ◽  
Vol 86 (1) ◽  
Author(s):  
Chengbin Zhang ◽  
Yongping Chen ◽  
Zilong Deng ◽  
Mingheng Shi
Keyword(s):  
Surface Topography ◽  
Rough Surface ◽  
Slip Flow

Adhesion of Polyethylene to Metals: The Role of Surface Topography

1979 ◽  
Vol 10 (3) ◽  
pp. 177-191 ◽  
Author(s):  
J. R. G. Evans ◽  
D. E. Packham
Keyword(s):  
Surface Topography

The Role of Surface Topography on Fatigue Behaviour of Nickel Based Superalloys

2014 ◽  
Vol 891-892 ◽  
pp. 48-53 ◽  
Author(s):  
Dennise Tanoko Ardi ◽  
Yue Gang Li ◽  
Kelvin Hau Kong Chan ◽  
Liam Blunt ◽  
M.R. Bache
Keyword(s):  
Fatigue Life ◽  
Surface Topography ◽  
Low Cycle Fatigue ◽  
Three Dimensional ◽  
Fatigue Behaviour ◽  
Fatigue Performance ◽  
Cycle Fatigue ◽  
Nickel Based Superalloy ◽  
Topographic Parameters

Advanced areal (three-dimensional) characterisation of surface topography was applied to laboratory scale fatigue test specimens manufactured from the nickel based superalloy Alloy720Li. Finishing was deliberately manipulated to offer four distinct grades of topography. Subsequent low cycle fatigue performance was then correlated to a range of parameters selected to represent the surface topography. The aim of the ongoing study is to predict fatigue performance and aid to establish correlations between topographic parameters and fatigue life.

scholarly journals How Escherichia coli lands and forms cell clusters on a surface: a new role of surface topography

2016 ◽  
Vol 6 (1) ◽  
Author(s):  
Huan Gu ◽  
Aaron Chen ◽  
Xinran Song ◽  
Megan E. Brasch ◽  
James H. Henderson ◽  
...  
Keyword(s):  
Escherichia Coli ◽  
Surface Topography ◽  
Cell Clusters
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