Abstract
We have observed the emergence of a large anisotropic magnetization and significant photoinduced changes in the magentization that appear at the interface between a gold film and an azobenzene-containing self-assembled monolayer. The magnetization value was extremely high, up to 50 μB per adsorbed molecule. These photomagnetic effects can be attributed to a photoinduced change in the loss of d charge due to photoisomerization of the azobenzene monolayer, which is accompanied by inversion of the surface dipoles. Furthermore, we have also observed reversible changes in the work function of the gold film by alternating UV and visible light, showing that the value of the surface dipole moment is changed as a result of photoisomerization. This allowed us to control the magnetization by alternating the photoillumination between UV and visible light, and we have clarified the mechanism for these photomagnetic effects. A novel strategy such as this, which enables significant reversible phototuning of the magnetic order, has great potential for applications in future magneto-optical devices.
| Original language | English |
|---|---|
| Pages (from-to) | 865-870 |
| Number of pages | 6 |
| Journal | Journal of the American Chemical Society |
| Volume | 131 |
| Issue number | 2 |
| DOIs | |
| Publication status | Published - 2009 Jan 21 |
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ASJC Scopus subject areas
- Chemistry(all)
- Catalysis
- Biochemistry
- Colloid and Surface Chemistry
Cite this
Reversible phototuning of the large anisotropic magnetization at the interface between a self-assembled photochromic monolayer and gold. / Suda, Masayuki; Kameyama, Naoto; Lkegami, Aya; Einaga, Yasuaki.
In: Journal of the American Chemical Society, Vol. 131, No. 2, 21.01.2009, p. 865-870.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Reversible phototuning of the large anisotropic magnetization at the interface between a self-assembled photochromic monolayer and gold
AU - Suda, Masayuki
AU - Kameyama, Naoto
AU - Lkegami, Aya
AU - Einaga, Yasuaki
PY - 2009/1/21
Y1 - 2009/1/21
N2 - We have observed the emergence of a large anisotropic magnetization and significant photoinduced changes in the magentization that appear at the interface between a gold film and an azobenzene-containing self-assembled monolayer. The magnetization value was extremely high, up to 50 μB per adsorbed molecule. These photomagnetic effects can be attributed to a photoinduced change in the loss of d charge due to photoisomerization of the azobenzene monolayer, which is accompanied by inversion of the surface dipoles. Furthermore, we have also observed reversible changes in the work function of the gold film by alternating UV and visible light, showing that the value of the surface dipole moment is changed as a result of photoisomerization. This allowed us to control the magnetization by alternating the photoillumination between UV and visible light, and we have clarified the mechanism for these photomagnetic effects. A novel strategy such as this, which enables significant reversible phototuning of the magnetic order, has great potential for applications in future magneto-optical devices.
AB - We have observed the emergence of a large anisotropic magnetization and significant photoinduced changes in the magentization that appear at the interface between a gold film and an azobenzene-containing self-assembled monolayer. The magnetization value was extremely high, up to 50 μB per adsorbed molecule. These photomagnetic effects can be attributed to a photoinduced change in the loss of d charge due to photoisomerization of the azobenzene monolayer, which is accompanied by inversion of the surface dipoles. Furthermore, we have also observed reversible changes in the work function of the gold film by alternating UV and visible light, showing that the value of the surface dipole moment is changed as a result of photoisomerization. This allowed us to control the magnetization by alternating the photoillumination between UV and visible light, and we have clarified the mechanism for these photomagnetic effects. A novel strategy such as this, which enables significant reversible phototuning of the magnetic order, has great potential for applications in future magneto-optical devices.
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U2 - 10.1021/ja808231c
DO - 10.1021/ja808231c
M3 - Article
C2 - 19072284
AN - SCOPUS:67849092023
VL - 131
SP - 865
EP - 870
JO - Journal of the American Chemical Society
JF - Journal of the American Chemical Society
SN - 0002-7863
IS - 2
ER -