TY - JOUR
T1 - Impact of magnetic field on molecular alignment and electrical conductivity in phthalocyanine nanowires
AU - Takami, Seiichi
AU - Furumi, Seiichi
AU - Shirai, Yasuhiro
AU - Sakka, Yoshio
AU - Wakayama, Yutaka
PY - 2012/5/7
Y1 - 2012/5/7
N2 - We demonstrate the effective use of a magnetic field to improve molecular alignment, and the resulting enhancement of the electrical conductivity of organic molecular nanowires. The structures of phthalocyanine nanowires, which are produced in porous alumina templates, are characterized by X-ray diffraction. Careful analyses reveal that the crystal morphologies of the phthalocyanine nanowires, e.g., domain size, columnar alignment and face-to-face spacing, are improved by using a 12 T magnetic field. This is because of the anisotropic magnetic susceptibility of the π-conjugated phthalocyanine macrocycle. Electrical measurements of individual nanowires performed with a multi-probe scanning electron microscope show that such highly ordered molecular packing results in a seventeen-fold increase in conductivity.
AB - We demonstrate the effective use of a magnetic field to improve molecular alignment, and the resulting enhancement of the electrical conductivity of organic molecular nanowires. The structures of phthalocyanine nanowires, which are produced in porous alumina templates, are characterized by X-ray diffraction. Careful analyses reveal that the crystal morphologies of the phthalocyanine nanowires, e.g., domain size, columnar alignment and face-to-face spacing, are improved by using a 12 T magnetic field. This is because of the anisotropic magnetic susceptibility of the π-conjugated phthalocyanine macrocycle. Electrical measurements of individual nanowires performed with a multi-probe scanning electron microscope show that such highly ordered molecular packing results in a seventeen-fold increase in conductivity.
UR - http://www.scopus.com/inward/record.url?scp=84859783518&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84859783518&partnerID=8YFLogxK
U2 - 10.1039/c2jm30179b
DO - 10.1039/c2jm30179b
M3 - Article
AN - SCOPUS:84859783518
VL - 22
SP - 8629
EP - 8633
JO - Journal of Materials Chemistry
JF - Journal of Materials Chemistry
SN - 0959-9428
IS - 17
ER -