Abstract
The short-range interaction force between a mica surface and an AFM probe tip in electrolyte solutions was measured by atomic force microscopy (AFM) to directly evaluate the thickness of the adsorbed layer on the surface. The magnetic effects were estimated by comparing the thickness in the magnetized solution with that in nonmagnetized solution. It was found that (i) the magnetic exposure thickens the adsorbed layer on the surface in electrolyte solutions, (ii) the magnetic effects are easily destroyed by the external disturbance, (iii) there exists a memory in the magnetic effects, which remains for at least a day, (iv) the magnetic effects appear mostly in the solutions of structure-disordering cations, such as Cs+, Rb+, and K+, and (v) the results are consistent with those obtained in preceding macroscopic experiments. It is hypothesized from these results that the water molecules weekly bound around the structure-disordering ions are quasistabilized and structured by the magnetic exposure and that the magnetic thickening of the adsorbed layer is caused by the adsorption of these structured ions on the surface.
| Original language | English |
|---|---|
| Pages (from-to) | 363-368 |
| Number of pages | 6 |
| Journal | Journal of Colloid and Interface Science |
| Volume | 204 |
| Issue number | 2 |
| DOIs | |
| Publication status | Published - Aug 15 1998 |
| Externally published | Yes |
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Keywords
- Adsorbed layer
- Atomic force microscope
- Magnetic effect
- Memory effect
- Structure-disordering ion
ASJC Scopus subject areas
- Colloid and Surface Chemistry
- Physical and Theoretical Chemistry
- Surfaces and Interfaces
Cite this
Magnetic effects on thickness of adsorbed layer in aqueous solutions evaluated directly by atomic force microscope. / Higashitani, Ko; Oshitani, Jun.
In: Journal of Colloid and Interface Science, Vol. 204, No. 2, 15.08.1998, p. 363-368.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Magnetic effects on thickness of adsorbed layer in aqueous solutions evaluated directly by atomic force microscope
AU - Higashitani, Ko
AU - Oshitani, Jun
PY - 1998/8/15
Y1 - 1998/8/15
N2 - The short-range interaction force between a mica surface and an AFM probe tip in electrolyte solutions was measured by atomic force microscopy (AFM) to directly evaluate the thickness of the adsorbed layer on the surface. The magnetic effects were estimated by comparing the thickness in the magnetized solution with that in nonmagnetized solution. It was found that (i) the magnetic exposure thickens the adsorbed layer on the surface in electrolyte solutions, (ii) the magnetic effects are easily destroyed by the external disturbance, (iii) there exists a memory in the magnetic effects, which remains for at least a day, (iv) the magnetic effects appear mostly in the solutions of structure-disordering cations, such as Cs+, Rb+, and K+, and (v) the results are consistent with those obtained in preceding macroscopic experiments. It is hypothesized from these results that the water molecules weekly bound around the structure-disordering ions are quasistabilized and structured by the magnetic exposure and that the magnetic thickening of the adsorbed layer is caused by the adsorption of these structured ions on the surface.
AB - The short-range interaction force between a mica surface and an AFM probe tip in electrolyte solutions was measured by atomic force microscopy (AFM) to directly evaluate the thickness of the adsorbed layer on the surface. The magnetic effects were estimated by comparing the thickness in the magnetized solution with that in nonmagnetized solution. It was found that (i) the magnetic exposure thickens the adsorbed layer on the surface in electrolyte solutions, (ii) the magnetic effects are easily destroyed by the external disturbance, (iii) there exists a memory in the magnetic effects, which remains for at least a day, (iv) the magnetic effects appear mostly in the solutions of structure-disordering cations, such as Cs+, Rb+, and K+, and (v) the results are consistent with those obtained in preceding macroscopic experiments. It is hypothesized from these results that the water molecules weekly bound around the structure-disordering ions are quasistabilized and structured by the magnetic exposure and that the magnetic thickening of the adsorbed layer is caused by the adsorption of these structured ions on the surface.
KW - Adsorbed layer
KW - Atomic force microscope
KW - Magnetic effect
KW - Memory effect
KW - Structure-disordering ion
UR - http://www.scopus.com/inward/record.url?scp=0032529542&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0032529542&partnerID=8YFLogxK
U2 - 10.1006/jcis.1998.5590
DO - 10.1006/jcis.1998.5590
M3 - Article
AN - SCOPUS:0032529542
VL - 204
SP - 363
EP - 368
JO - Journal of Colloid and Interface Science
JF - Journal of Colloid and Interface Science
SN - 0021-9797
IS - 2
ER -