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chenrf77

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[资源] Photoconductive Coaxial Nanotubes(Science 很有意思啊)

Photoconductive Coaxial Nanotubes
of Molecularly Connected Electron
Donor and Acceptor Layers
Yohei Yamamoto,1 Takanori Fukushima,1,2* Yuki Suna,1 Noriyuki Ishii,3 Akinori Saeki,4
Shu Seki,4 Seiichi Tagawa,4 Masateru Taniguchi,4 Tomoji Kawai,4 Takuzo Aida1,2*
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 p-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 104. In sharp contrast, the microfibers consist of a
charge-transfer complex between the hexabenzocoronene and trinitrofluorenone parts and exhibit
almost no photocurrent generation.

觉得有意思的就顶一下了！