AI Article Synopsis
- Low-dimensional nanomaterials, like carbon nanotubes (CNT) and graphene, have unique electronic properties that are advantageous for photodetection.
- A mixed-dimensional heterostructure combining these materials can enhance photodetection capabilities, demonstrated by a CNT-graphene photodetector that can switch between high and low spatial resolution modes.
- The ability to control spatial resolution electrically, shown by the detection of 334 nm interference fringes, highlights the potential of these mixed-dimensional devices in future nanoelectronics and optoelectronics.
Article Abstract
Low-dimensional nanomaterials, such as one-dimensional (1D) nanomaterials and layered 2D materials, have exhibited significance for their respective unique electronic and optoelectronic properties. Here we show that a mixed-dimensional heterostructure with building blocks from multiple dimensions will present a synergistic effect on photodetection. A carbon nanotube (CNT)-[Formula: see text]-graphene photodetector is representative on this issue. Its spatial resolution can be electrically switched between high-resolution mode (HRM) and low-resolution mode (LRM) revealed by scanning photocurrent microscopy (SPCM). The reconfigurable spatial resolution can be attributed to the asymmetric geometry and the gate-tunable Fermi levels of these low-dimensional materials. Significantly, an interference fringe with 334 nm in period was successfully discriminated by the device working at HRM, confirming the efficient electrical control. Electrical control of spatial resolution in CNT-[Formula: see text]-graphene devices reveals the potential of the mixed-dimensional architectures in future nanoelectronics and nano-optoelectronics.
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| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6452663 | PMC |
| http://dx.doi.org/10.1073/pnas.1817229116 | DOI Listing |
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