Portal de Periódicos da CAPES

Precise pitch-scaling of carbon nanotube arrays within three-dimensional DNA nanotrenches

2020; American Association for the Advancement of Science; Volume: 368; Issue: 6493 Linguagem: Inglês

10.1126/science.aaz7440

1095-9203

Wei Sun, Jie Shen, Zhao Zhao, Noel Arellano, Charles Rettner, Jianshi Tang, Tianyang Cao, Zhiyu Zhou, Toan Ta, Jason K. Streit, Jeffrey Fagan, Thomas E. Schaus, Ming Zheng, Shu‐Jen Han, William M. Shih, Hareem Maune, Peng Yin,

Nanopore and Nanochannel Transport Studies

DNA 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