Average molecular orientations in the adsorbed water layers on silicon oxide in ambient conditions

2008 ◽  
Vol 10 (32) ◽  
pp. 4981 ◽  
Author(s):  
Anna L. Barnette ◽  
David B. Asay ◽  
Seong H. Kim
Keyword(s):  
Silicon Oxide ◽  
Adsorbed Water ◽  
Ambient Conditions ◽  
Water Layers

Temperature and Field Dependence of Protonated Water Cluster Emission from Field Adsorbed Water Layers on Platinum

2001 ◽  
Author(s):  
Christopher J. Rothfuss ◽  
Valentin K. Medvedev ◽  
Eric M. Stuve
Keyword(s):  
Field Dependence ◽  
Water Cluster ◽  
Adsorbed Water ◽  
Cluster Emission ◽  
Water Layers

The Microscopic Structure of Adsorbed Water on Hydrophobic Surfaces under Ambient Conditions

Nano Letters ◽  
2011 ◽  
Vol 11 (12) ◽  
pp. 5581-5586 ◽  
Author(s):  
Peigen Cao ◽  
Ke Xu ◽  
Joseph O. Varghese ◽  
James R. Heath
Keyword(s):  
Adsorbed Water ◽  
Microscopic Structure ◽  
Ambient Conditions ◽  
Hydrophobic Surfaces

scholarly journals Dissipation induced by attractive interaction in dynamic force microscopy: contribution of adsorbed water layers

2002 ◽  
Vol 499 (2-3) ◽  
pp. 152-160 ◽  
Author(s):  
L Nony ◽  
T Cohen-Bouhacina ◽  
J.-P Aimé
Keyword(s):  
Adsorbed Water ◽  
Attractive Interaction ◽  
Dynamic Force ◽  
Force Microscopy ◽  
Water Layers

Vertical and Lateral Order in Adsorbed Water Layers on Anatase TiO2(101)

Langmuir ◽  
2004 ◽  
Vol 20 (19) ◽  
pp. 8379-8384 ◽  
Author(s):  
Antonio Tilocca ◽  
Annabella Selloni
Keyword(s):  
Adsorbed Water ◽  
Anatase Tio2 ◽  
Water Layers

Chemical Vapor Deposited Graphene for Opto-Electronic Applications

2016 ◽  
Vol 39 ◽  
pp. 57-68
Author(s):  
Vikram Passi ◽  
Amit Gahoi ◽  
Sarah Riazimehr ◽  
Stefan Wagner ◽  
Andreas Bablich ◽  
...  
Keyword(s):  
Contact Resistance ◽  
Spectral Response ◽  
Single Layer ◽  
Chemical Vapor ◽  
Adsorbed Water ◽  
Single Layer Graphene ◽  
Ambient Conditions ◽  
Transfer Length ◽  
Type Silicon ◽  
P Type

In this work, fabrication and characterisation of graphene photodiodes and transfer length method structures is presented. Graphene growth is carried out using a thermal chemical vapor deposition process on copper foils and subsequently transferred onto silicon-dioxide/silicon substrate. Comparison of electrical and optical characteristics of the photodiodes, which are fabricated on both n-type and p-type silicon, is shown. The photodiodes fabricated on n-type silicon show good rectifying behaviour when compared with photodiodes fabricated on p-type silicon. Spectral response of graphene photodiodes is measured to be less than 0.2 mAW-1 which is attributed to the light absorbance of 2.3% for single layer graphene. Transfer length method device structures are also fabricated and contact resistance is calculated and plotted as a function of spacing between the contacts. The calculated contact resistance (RcW) is 0.87 kΩ.µm. The latter structures are also characterised under various ambient conditions, before and after annealing. The value of contact resistance reduces from 0.87 kΩ.µm to 0.75 kΩ.µm after annealing. This reduction is attributed to the improvement in bonding between graphene and metal. Measurements under vacuum show an increase in contact resistance which is attributed to the removal of adsorbed water molecules on the surface on graphene. The sheet resistivity of graphene is calculated to be between 1.17 kΩ/□ and 3.67 kΩ/□.

Contact Forces between TiO2Nanoparticles Governed by an Interplay of Adsorbed Water Layers and Roughness

Langmuir ◽  
2015 ◽  
Vol 31 (41) ◽  
pp. 11288-11295 ◽  
Author(s):  
Jens Laube ◽  
Samir Salameh ◽  
Michael Kappl ◽  
Lutz Mädler ◽  
Lucio Colombi Ciacchi
Keyword(s):  
Adsorbed Water ◽  
Contact Forces ◽  
Water Layers

scholarly journals Effects of Gas Adsorption in Nanotribology and Demonstration of In-Situ Vapor Phase Lubrication of MEMS Devices

2007 ◽  
Author(s):  
David B. Asay ◽  
Michael T. Dugger ◽  
Seong H. Kim
Keyword(s):  
Vapor Phase ◽  
Microelectromechanical Systems ◽  
Silicon Oxide ◽  
Gas Adsorption ◽  
Extended Period ◽  
Adsorbed Water ◽  
Oxide Surface ◽  
Mems Devices ◽  
Vapor Phase Lubrication

This paper discusses the important role of gas adsorption in nanotribology and demonstrates in-situ vapor phase lubrication of microelectromechanical systems (MEMS) devices. We have elucidated the molecular ordering and thickness of the adsorbed water layer on the clean silicon oxide surface and found the molecular-level origin for the high adhesion between nano-asperity silicon oxide contacts in humid ambient. The same gas adsorption process can be utilized for continuous supply of lubricant molecules to form a few Å thick lubricant films on solid surfaces. Using alcohol vapor adsorption, we demonstrated that the adhesion, friction, and wear of the silicon oxide surface can significantly be reduced. This process made it possible to operate sliding MEMS without failure for an extended period of time.

scholarly journals Diffusivity and Mobility of Adsorbed Water Layers at TiO2 Rutile and Anatase Interfaces

Crystals ◽  
2015 ◽  
Vol 6 (1) ◽  
pp. 1 ◽  
Author(s):  
Niall English
Keyword(s):  
Adsorbed Water ◽  
Water Layers ◽  
Tio2 Rutile
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