Observation of dynamic water microadsorption on Au surface
Abstract
Experimental and theoretical research on water wettability, adsorption, and condensation on solid surfaces has been ongoing for many decades because of the availability of new materials, new detection and measurement techniques, novel applications, and different scales of dimensions. Au is a metal of special interest because it is chemically inert, has a high surface energy, is highly conductive, and has a relatively high melting point. It has wide applications in semiconductor integrated circuitry, microelectromechanical systems, microfluidics, biochips, jewelry, coinage, and even dental restoration. Therefore, its surface condition, wettability, wear resistance, lubrication, and friction attract a lot of attention from both scientists and engineers. In this paper, the authors experimentally investigated Au{sub 2}O{sub 3} growth, wettability, roughness, and adsorption utilizing atomic force microscopy, scanning electron microscopy, reflectance spectrometry, and contact angle measurement. Samples were made using a GaAs substrate. Utilizing a super-hydrophilic Au surface and the proper surface conditions of the surrounding GaAs, dynamic microadsorption of water on the Au surface was observed in a clean room environment. The Au surface area can be as small as 12 μm{sup 2}. The adsorbed water was collected by the GaAs groove structure and then redistributed around the structure. A model was developed to qualitativelymore »
- Authors:
-
- TriQuint Semiconductor, Inc., 500 W Renner Road, Richardson, Texas 75080 (United States)
- Publication Date:
- OSTI Identifier:
- 22258569
- Resource Type:
- Journal Article
- Journal Name:
- Journal of Vacuum Science and Technology. A, Vacuum, Surfaces and Films
- Additional Journal Information:
- Journal Volume: 32; Journal Issue: 3; Other Information: (c) 2014 American Vacuum Society; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0734-2101
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; ADSORPTION; ATOMIC FORCE MICROSCOPY; GALLIUM ARSENIDES; GOLD; GOLD OXIDES; MELTING POINTS; ROUGHNESS; SCANNING ELECTRON MICROSCOPY; SEMICONDUCTOR MATERIALS; SPECTROSCOPY; SUBSTRATES; SURFACE AREA; SURFACE ENERGY; SURFACES; WATER; WEAR RESISTANCE; WETTABILITY
Citation Formats
Huang, Xiaokang, Gupta, Gaurav, Gao, Weixiang, Tran, Van, Nguyen, Bang, McCormick, Eric, Cui, Yongjie, Yang, Yinbao, Hall, Craig, and Isom, Harold. Observation of dynamic water microadsorption on Au surface. United States: N. p., 2014.
Web. doi:10.1116/1.4870929.
Huang, Xiaokang, Gupta, Gaurav, Gao, Weixiang, Tran, Van, Nguyen, Bang, McCormick, Eric, Cui, Yongjie, Yang, Yinbao, Hall, Craig, & Isom, Harold. Observation of dynamic water microadsorption on Au surface. United States. https://doi.org/10.1116/1.4870929
Huang, Xiaokang, Gupta, Gaurav, Gao, Weixiang, Tran, Van, Nguyen, Bang, McCormick, Eric, Cui, Yongjie, Yang, Yinbao, Hall, Craig, and Isom, Harold. 2014.
"Observation of dynamic water microadsorption on Au surface". United States. https://doi.org/10.1116/1.4870929.
@article{osti_22258569,
title = {Observation of dynamic water microadsorption on Au surface},
author = {Huang, Xiaokang and Gupta, Gaurav and Gao, Weixiang and Tran, Van and Nguyen, Bang and McCormick, Eric and Cui, Yongjie and Yang, Yinbao and Hall, Craig and Isom, Harold},
abstractNote = {Experimental and theoretical research on water wettability, adsorption, and condensation on solid surfaces has been ongoing for many decades because of the availability of new materials, new detection and measurement techniques, novel applications, and different scales of dimensions. Au is a metal of special interest because it is chemically inert, has a high surface energy, is highly conductive, and has a relatively high melting point. It has wide applications in semiconductor integrated circuitry, microelectromechanical systems, microfluidics, biochips, jewelry, coinage, and even dental restoration. Therefore, its surface condition, wettability, wear resistance, lubrication, and friction attract a lot of attention from both scientists and engineers. In this paper, the authors experimentally investigated Au{sub 2}O{sub 3} growth, wettability, roughness, and adsorption utilizing atomic force microscopy, scanning electron microscopy, reflectance spectrometry, and contact angle measurement. Samples were made using a GaAs substrate. Utilizing a super-hydrophilic Au surface and the proper surface conditions of the surrounding GaAs, dynamic microadsorption of water on the Au surface was observed in a clean room environment. The Au surface area can be as small as 12 μm{sup 2}. The adsorbed water was collected by the GaAs groove structure and then redistributed around the structure. A model was developed to qualitatively describe the dynamic microadsorption process. The effective adsorption rate was estimated by modeling and experimental data. Devices for moisture collection and a liquid channel can be made by properly arranging the wettabilities or contact angles of different materials. These novel devices will be very useful in microfluid applications or biochips.},
doi = {10.1116/1.4870929},
url = {https://www.osti.gov/biblio/22258569},
journal = {Journal of Vacuum Science and Technology. A, Vacuum, Surfaces and Films},
issn = {0734-2101},
number = 3,
volume = 32,
place = {United States},
year = {Thu May 15 00:00:00 EDT 2014},
month = {Thu May 15 00:00:00 EDT 2014}
}