title: Segregated and alternately stacked donor/acceptor nanodomains in tubular morphology tailored with zinc porphyrin-C60 amphiphilic dyads: clear geometrical effects on photoconduction.
abstract: Amphiphilic zinc porphyrin (P(Zn); electron donor, D)-fullerene (C(60); electron acceptor, A) dyads 2 and 3, bearing an identical hydrophilic wedge with triethylene glycol chains but different linkers between the P(Zn) and C(60) units, self-assemble into nanotubes with essentially different dimensional and geometrical features from one another. The nanotube from dyad 2 with an ester linker consists of a bilayer wall formed with coaxially segregated D and A nanodomains along the tube axis (coaxial D-A heterojunction), thereby displaying explicit photoconductivity with ambipolar carrier transport properties. In contrast, the nanotube from dyad 3 with a rigid arylacetylene linker consists of a monolayer wall with an alternate geometry of D/A stacking, resulting in poor photoconducting outputs. Such a geometrical difference also significantly affects the photovoltaic properties.
authors.affiliation: ERATO-SORST Nanospace Project, Japan Science and Technology Agency (JST), 2-3-6 Aomi, Koto-ku, Tokyo 135-0064, Japan. racharvet@yahoo.com
authors.forename: Richard
authors.initials: R
authors.lastname: Charvet
authors.forename: Yohei
authors.initials: Y
authors.lastname: Yamamoto
authors.forename: Takayuki
authors.initials: T
authors.lastname: Sasaki
authors.forename: Jungeun
authors.initials: J
authors.lastname: Kim
authors.forename: Kenichi
authors.initials: K
authors.lastname: Kato
authors.forename: Masaki
authors.initials: M
authors.lastname: Takata
authors.forename: Akinori
authors.initials: A
authors.lastname: Saeki
authors.forename: Shu
authors.initials: S
authors.lastname: Seki
authors.forename: Takuzo
authors.initials: T
authors.lastname: Aida