期刊
ACS NANO
卷 12, 期 11, 页码 11169-11177出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsnano.8b05695
关键词
enhanced photoelectric response; heterogeneous nanochannels; self-assembly; tetra(4-sulfonatophenyl)porphyrin; hourglass-shaped alumina
类别
资金
- National Key Research and Development Program of China [2017YFA0206902, 2017YFA0206900]
- National Natural Science Foundation [21471012, 21771016]
- Fundamental Research Funds for the Central Universities
Photoresponsive nanochannel systems whose ionic transportation properties can be controlled by the photoelectric effect, such as for green chlorophyll pigments in plants, are attracting widespread attention. Herein, we prepared photoresponsive heterogeneous nano channels by decorating self-assembled tetra(4-sulfonatophenyl)porphyrin (TPPS) nanofiber membranes on a membrane of hourglass-shaped alumina (Al2O3) nanochannels using the diffusion-limited patterning (DLP) method. The close arrangement of large-area nanofibers promoted the photoresponse sensitivity of the heterogeneous nanochannels, which showed the highest ionic transportation current. With illumination comparable to sunlight in intensity, the photoresponsive ionic current was approximately 9.7 mu A, demonstrating photoswitching, which could be used to regulate the reversible transformation of ionic currents. Meanwhile, the cooperative effect of the TPPS nanofibers assembled at the entrance to the nanochannels and the TPPS molecules inside the nanochannels allowed the heterogeneous nanochannels to exhibit a good rectifying performance.
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