DNA-directed nanofabrication of high-performance carbon nanotube field-effect transistors
2020; American Association for the Advancement of Science; Volume: 368; Issue: 6493 Linguagem: Inglês
10.1126/science.aaz7435
ISSN1095-9203
AutoresMengyu Zhao, Yahong Chen, Kexin Wang, Zhaoxuan Zhang, Jason K. Streit, Jeffrey Fagan, Jianshi Tang, Ming Zheng, Chaoyong Yang, Zhi Zhu, Wei Sun,
Tópico(s)Quantum-Dot Cellular Automata
ResumoDNA bricks build nanotube transistors Semiconducting carbon nanotubes (CNTs) are an attractive platform for field-effect transistors (FETs) because they potentially can outperform silicon as dimensions shrink. Challenges to achieving superior performance include creating highly aligned and dense arrays of nanotubes as well as removing coatings that increase contact resistance. Sun et al. aligned CNTs by wrapping them with single-stranded DNA handles and binding them into DNA origami bricks that formed an array of channels with precise intertube pitches as small as 10.4 nanometers. Zhao et al. then constructed single and multichannel FETs by attaching the arrays to a polymer-templated silicon wafer. After adding metal contacts across the CNTs to fix them to the substrate, they washed away all of the DNA and then deposited electrodes and gate dielectrics. The FETs showed high on-state performance and fast on-off switching. Science , this issue p. 874 , p. 878
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