Photoconductive coaxial nanotubes of molecularly connected electron donor and acceptor layers.
Controlled self-assembly of a trinitrofluorenone-appended gemini-shaped amphiphilic hexabenzocoronene selectively formed nanotubes or microfibers with different photochemical properties. In these nanotubes, which are 16 nanometers in diameter and several micrometers long, a molecular layer of electron-accepting trinitrofluorenone laminates an electron-donating graphitic layer of pi-stacked hexabenzocoronene. The coaxial nanotubular structure allows photochemical generation of spatially separated charge carriers and a quick photoconductive response with a large on/off ratio greater than 10(4). In sharp contrast, the microfibers consist of a charge-transfer complex between the hexabenzocoronene and trinitrofluorenone parts and exhibit almost no photocurrent generation.
Yamamoto
Yohei
Y
Exploratory Research for Advanced Technology-Solution Oriented Research for Science and Technology (ERATO-SORST), Japan Science and Technology Agency, National Museum of Emerging Science and Innovation, 2-41 Aomi, Koto-ku, Tokyo 135-0064, Japan.
Fukushima
Takanori
T
Suna
Yuki
Y
Ishii
Noriyuki
N
Saeki
Akinori
A
Seki
Shu
S
Tagawa
Seiichi
S
Taniguchi
Masateru
M
Kawai
Tomoji
T
Aida
Takuzo
T