Rational growth of branched nanowire heterostructures with synthetically encoded properties and function
Author(s)Tian, Bozhi; Jiang, Xiaocheng; Xiang, Jie; Qian, Fang; Zheng, Gengfeng; Wang, Hongtao; Mai, Liqiang; Lieber, Charles M.; ... Show more Show less
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Branched nanostructures represent unique, 3D building blocks for the “bottom-up” paradigm of nanoscale science and technology. Here, we report a rational, multistep approach toward the general synthesis of 3D branched nanowire (NW) heterostructures. Single-crystalline semiconductor, including groups IV, III–V, and II–VI, and metal branches have been selectively grown on core or core/shell NW backbones, with the composition, morphology, and doping of core (core/shell) NWs and branch NWs well controlled during synthesis. Measurements made on the different composition branched NW structures demonstrate encoding of functional p-type/n-type diodes and light-emitting diodes (LEDs) as well as field effect transistors with device function localized at the branch/backbone NW junctions. In addition, multibranch/backbone NW structures were synthesized and used to demonstrate capability to create addressable nanoscale LED arrays, logic circuits, and biological sensors. Our work demonstrates a previously undescribed level of structural and functional complexity in NW materials, and more generally, highlights the potential of bottom-up synthesis to yield increasingly complex functional systems in the future.
DepartmentDavid H. Koch Institute for Integrative Cancer Research at MIT
Proceedings of the National Academy of Sciences
Proceedings of the National Academy of Sciences (PNAS)
Jiang, X. et al. “Rational growth of branched nanowire heterostructures with synthetically encoded properties and function.” Proceedings of the National Academy of Sciences 108.30 (2011): 12212-12216. Web. 1 Feb. 2012.
Final published version