1887
banner image
No data available.
Please log in to see this content.
You have no subscription access to this content.
No metrics data to plot.
The attempt to load metrics for this article has failed.
The attempt to plot a graph for these metrics has failed.
Wetting-induced electrorheological effect
Rent:
Rent this article for
USD
10.1063/1.2199749
    + View Affiliations - Hide Affiliations
    Affiliations:
    1 Department of Chemistry, HKUST, Clear Water Bay, Kowloon, Hong Kong, China and the Institute of Nano Science and Technology, HKUST, Clear Water Bay, Kowloon, Hong Kong, China
    2 Department of Physics, HKUST, Clear Water Bay, Kowloon, Hong Kong, China and the Institute of Nano Science and Technology, HKUST, Clear Water Bay, Kowloon, Hong Kong, China
    3 Department of Chemistry, HKUST, Clear Water Bay, Kowloon, Hong Kong, China and the Institute of Nano Science and Technology, HKUST, Clear Water Bay, Kowloon, Hong Kong, China
    4 Department of Physics, HKUST, Clear Water Bay, Kowloon, Hong Kong, China and the Institute of Nano Science and Technology, HKUST, Clear Water Bay, Kowloon, Hong Kong, China
    a) Author to whom correspondence should be addressed; electronic mail: phwen@ust.hk
    J. Appl. Phys. 99, 106104 (2006); http://dx.doi.org/10.1063/1.2199749
/content/aip/journal/jap/99/10/10.1063/1.2199749
http://aip.metastore.ingenta.com/content/aip/journal/jap/99/10/10.1063/1.2199749
View: Figures

Figures

Image of FIG. 1.
FIG. 1.

(Color online) A comparison between silicone oil-based GER fluid (left upper inset), which has excellent yield stress characteristic (red and green symbols), and hydrocarbon oil-based mixture (left lower inset) which exhibits no yield stress (blue symbols). The square voltage pulse applied to the sample is shown in the figure. The height of the pulse corresponds to the voltage denoted on the horizontal axis across a gap. Duration of the pulse is . Here the concentration is denoted by the amount of suspending fluid, in unit of ml, mixed with each gram of powder. Hence 0.3 means each gram of powder is mixed with of oil.

Image of FIG. 2.
FIG. 2.

(Color online) Yield stress as a function of applied electric field for the hydrocarbon oil-based GER fluid (with the oleic acid additive). Here 0.3 means each gram of solid powder is mixed with of hydrocarbon oil. Inset shows the changed appearance of the mixture after adding a very small amount of oleic acid. For comparison, see the lower left inset of Fig. 1. Measurement conditions are the same as those data shown in Fig. 1. The jagged tops of the yield stress curves are due to the stick-slip phenomenon when the sample is “solidified” across the measuring gap.

Image of FIG. 3.
FIG. 3.

(Color online) Pictorial cartoons of the wetting effect. (a) shows that when the fluid does not wet the solid particles, the two phases tend to phase separate, and the solid particles would form aggregates. (b) shows that with the addition of oleic acid, wetting is mediated by the surfactant, and dispersion of the nanoparticles becomes possible. Here red denotes oil, blue denotes the solid particles, and the wiggly lines denote the surfactant (oleic acid in this case). (c) and (d) are SEM images that correspond the cases (a) and (b), respectively.

Loading

Article metrics loading...

/content/aip/journal/jap/99/10/10.1063/1.2199749
2006-05-22
2014-04-20
Loading

Full text loading...

This is a required field
Please enter a valid email address
752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Wetting-induced electrorheological effect
http://aip.metastore.ingenta.com/content/aip/journal/jap/99/10/10.1063/1.2199749
10.1063/1.2199749
SEARCH_EXPAND_ITEM